We report the concentration, phosphorus (P) and nitrogen (N) content, and size and chemical fractionation of fine suspended particles (0.2‐100 µm) and colloids (3 kilodalton [kDa]‐0.1 µm) in the surface water of Everglades wetlands along regional and P‐enrichment gradients. Total suspended sediment concentrations ranged from 0.7 to 2.7 mg L−1. Total particulate P concentrations increased from 0.05 µmol L21 to 0.31 µmol L−1along the Penrichment gradient. Particles contained from 20% to 43% of total P but <12% of total N in surface water. Dissolved (<0.2 µm) organic N contained about 90% of total N, with the 3‐100‐kDa colloidal size class containing the most N of any size class. The 0.45‐2.7‐µm size fraction held the most particulate P at all sites, whereas particulate N was most abundant in the 2.7‐10‐µm size class at most sites. Standard chemical fractionation of particles identified acid‐hydrolyzable P as the most abundant species of particulate P, with little reactive or refractory organic P. Sequential chemical extraction revealed that about 65% of total particulate P was microbial, while about 25% was associated with humic and fulvic organic matter. The size and chemical fractionation information suggested that P‐rich particles mostly consisted of suspended bacteria. Suspended particles in Everglades wetlands were small in size and had low concentrations, yet they stored a large proportion of surface‐water P in intermediately reactive forms, but they held little N.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Limnology and Oceanography","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.4319/lo.2007.52.3.1166","issn":"00243590","usgsCitation":"Noe, G., Harvey, J.W., and Saiers, J.E., 2007, Characterization of suspended particles in Everglades wetlands: Limnology and Oceanography, v. 52, no. 3, p. 1166-1178, https://doi.org/10.4319/lo.2007.52.3.1166.","productDescription":"13 p.","startPage":"1166","endPage":"1178","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":477128,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.715.2908","text":"External Repository"},{"id":240457,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":265987,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.4319/lo.2007.52.3.1166"}],"country":"United States","state":"Florida","otherGeospatial":"Everglades wetlands","volume":"52","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-05-17","publicationStatus":"PW","scienceBaseUri":"5059f4dfe4b0c8380cd4bf8c","contributors":{"authors":[{"text":"Noe, Gregory B. 0000-0002-6661-2646 gnoe@usgs.gov","orcid":"https://orcid.org/0000-0002-6661-2646","contributorId":2332,"corporation":false,"usgs":true,"family":"Noe","given":"Gregory","email":"gnoe@usgs.gov","middleInitial":"B.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":false,"id":424717,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harvey, Judson W. 0000-0002-2654-9873 jwharvey@usgs.gov","orcid":"https://orcid.org/0000-0002-2654-9873","contributorId":1796,"corporation":false,"usgs":true,"family":"Harvey","given":"Judson","email":"jwharvey@usgs.gov","middleInitial":"W.","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":424715,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Saiers, James E.","contributorId":191842,"corporation":false,"usgs":false,"family":"Saiers","given":"James","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":424716,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70030354,"text":"70030354 - 2007 - Red-shouldered hawk occupancy surveys in central Minnesota, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030354","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Red-shouldered hawk occupancy surveys in central Minnesota, USA","docAbstract":"Forest-dwelling raptors are often difficult to detect because many species occur at low density or are secretive. Broadcasting conspecific vocalizations can increase the probability of detecting forest-dwelling raptors and has been shown to be an effective method for locating raptors and assessing their relative abundance. Recent advances in statistical techniques based on presence-absence data use probabilistic arguments to derive probability of detection when it is <1 and to provide a model and likelihood-based method for estimating proportion of sites occupied. We used these maximum-likelihood models with data from red-shouldered hawk (Buteo lineatus) call-broadcast surveys conducted in central Minnesota, USA, in 1994-1995 and 2004-2005. Our objectives were to obtain estimates of occupancy and detection probability 1) over multiple sampling seasons (yr), 2) incorporating within-season time-specific detection probabilities, 3) with call type and breeding stage included as covariates in models of probability of detection, and 4) with different sampling strategies. We visited individual survey locations 2-9 times per year, and estimates of both probability of detection (range = 0.28-0.54) and site occupancy (range = 0.81-0.97) varied among years. Detection probability was affected by inclusion of a within-season time-specific covariate, call type, and breeding stage. In 2004 and 2005 we used survey results to assess the effect that number of sample locations, double sampling, and discontinued sampling had on parameter estimates. We found that estimates of probability of detection and proportion of sites occupied were similar across different sampling strategies, and we suggest ways to reduce sampling effort in a monitoring program.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Wildlife Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2193/2006-013","issn":"00225","usgsCitation":"Henneman, C., McLeod, M., and Andersen, D., 2007, Red-shouldered hawk occupancy surveys in central Minnesota, USA: Journal of Wildlife Management, v. 71, no. 2, p. 526-533, https://doi.org/10.2193/2006-013.","startPage":"526","endPage":"533","numberOfPages":"8","costCenters":[],"links":[{"id":211950,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2193/2006-013"},{"id":239338,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"2","noUsgsAuthors":false,"publicationDate":"2010-12-13","publicationStatus":"PW","scienceBaseUri":"50e4a3a0e4b0e8fec6cdb8de","contributors":{"authors":[{"text":"Henneman, C.","contributorId":64879,"corporation":false,"usgs":true,"family":"Henneman","given":"C.","affiliations":[],"preferred":false,"id":426816,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McLeod, M.A.","contributorId":66437,"corporation":false,"usgs":true,"family":"McLeod","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":426817,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Andersen, D. E.","contributorId":27816,"corporation":false,"usgs":true,"family":"Andersen","given":"D. E.","affiliations":[],"preferred":false,"id":426815,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70029880,"text":"70029880 - 2007 - In situ hydrogen consumption kinetics as an indicator of subsurface microbial activity","interactions":[],"lastModifiedDate":"2018-10-17T12:44:23","indexId":"70029880","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1619,"text":"FEMS Microbiology Ecology","onlineIssn":"1574-6941","printIssn":"0168-6496","active":true,"publicationSubtype":{"id":10}},"title":"In situ hydrogen consumption kinetics as an indicator of subsurface microbial activity","docAbstract":"There are few methods available for broadly assessing microbial community metabolism directly within a groundwater environment. In this study, hydrogen consumption rates were estimated from in situ injection/withdrawal tests conducted in two geochemically varying, contaminated aquifers as an approach towards developing such a method. The hydrogen consumption first-order rates varied from 0.002 nM h-1 for an uncontaminated, aerobic site to 2.5 nM h-1 for a contaminated site where sulfate reduction was a predominant process. The method could accommodate the over three orders of magnitude range in rates that existed between subsurface sites. In a denitrifying zone, the hydrogen consumption rate (0.02 nM h-1) was immediately abolished in the presence of air or an antibiotic mixture, suggesting that such measurements may also be sensitive to the effects of environmental perturbations on field microbial activities. Comparable laboratory determinations with sediment slurries exhibited hydrogen consumption kinetics that differed substantially from the field estimates. Because anaerobic degradation of organic matter relies on the rapid consumption of hydrogen and subsequent maintenance at low levels, such in situ measures of hydrogen turnover can serve as a key indicator of the functioning of microbial food webs and may be more reliable than laboratory determinations.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"FEMS Microbiology Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1574-6941.2007.00286.x","issn":"01686496","usgsCitation":"Harris, S., Smith, R.L., and Suflita, J.M., 2007, In situ hydrogen consumption kinetics as an indicator of subsurface microbial activity: FEMS Microbiology Ecology, v. 60, no. 2, p. 220-228, https://doi.org/10.1111/j.1574-6941.2007.00286.x.","productDescription":"9 p.","startPage":"220","endPage":"228","numberOfPages":"9","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":487621,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1574-6941.2007.00286.x","text":"Publisher Index Page"},{"id":212892,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1574-6941.2007.00286.x"},{"id":240456,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"60","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a39a4e4b0c8380cd619b7","contributors":{"authors":[{"text":"Harris, S.H.","contributorId":10950,"corporation":false,"usgs":true,"family":"Harris","given":"S.H.","email":"","affiliations":[],"preferred":false,"id":424712,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Smith, Richard L. 0000-0002-3829-0125 rlsmith@usgs.gov","orcid":"https://orcid.org/0000-0002-3829-0125","contributorId":1592,"corporation":false,"usgs":true,"family":"Smith","given":"Richard","email":"rlsmith@usgs.gov","middleInitial":"L.","affiliations":[{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":38175,"text":"Toxics Substances Hydrology Program","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":424714,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Suflita, Joseph M.","contributorId":187604,"corporation":false,"usgs":false,"family":"Suflita","given":"Joseph","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":424713,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70029878,"text":"70029878 - 2007 - Development and implementation of a Bayesian-based aquifer vulnerability assessment in Florida","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029878","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2832,"text":"Natural Resources Research","onlineIssn":"1573-8981","printIssn":"1520-7439","active":true,"publicationSubtype":{"id":10}},"title":"Development and implementation of a Bayesian-based aquifer vulnerability assessment in Florida","docAbstract":"The Florida Aquifer Vulnerability Assessment (FAVA) was designed to provide a tool for environmental, regulatory, resource management, and planning professionals to facilitate protection of groundwater resources from surface sources of contamination. The FAVA project implements weights-of-evidence (WofE), a data-driven, Bayesian-probabilistic model to generate a series of maps reflecting relative aquifer vulnerability of Florida's principal aquifer systems. The vulnerability assessment process, from project design to map implementation is described herein in reference to the Floridan aquifer system (FAS). The WofE model calculates weighted relationships between hydrogeologic data layers that influence aquifer vulnerability and ambient groundwater parameters in wells that reflect relative degrees of vulnerability. Statewide model input data layers (evidential themes) include soil hydraulic conductivity, density of karst features, thickness of aquifer confinement, and hydraulic head difference between the FAS and the watertable. Wells with median dissolved nitrogen concentrations exceeding statistically established thresholds serve as training points in the WofE model. The resulting vulnerability map (response theme) reflects classified posterior probabilities based on spatial relationships between the evidential themes and training points. The response theme is subjected to extensive sensitivity and validation testing. Among the model validation techniques is calculation of a response theme based on a different water-quality indicator of relative recharge or vulnerability: dissolved oxygen. Successful implementation of the FAVA maps was facilitated by the overall project design, which included a needs assessment and iterative technical advisory committee input and review. Ongoing programs to protect Florida's springsheds have led to development of larger-scale WofE-based vulnerability assessments. Additional applications of the maps include land-use planning amendments and prioritization of land purchases to protect groundwater resources. ?? International Association for Mathematical Geology 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Natural Resources Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11053-007-9038-5","issn":"15207439","usgsCitation":"Arthur, J.D., Wood, H., Baker, A., Cichon, J., and Raines, G.L., 2007, Development and implementation of a Bayesian-based aquifer vulnerability assessment in Florida: Natural Resources Research, v. 16, no. 2, p. 93-107, https://doi.org/10.1007/s11053-007-9038-5.","startPage":"93","endPage":"107","numberOfPages":"15","costCenters":[],"links":[{"id":212867,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11053-007-9038-5"},{"id":240425,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-06-02","publicationStatus":"PW","scienceBaseUri":"505a0024e4b0c8380cd4f5ea","contributors":{"authors":[{"text":"Arthur, J. D.","contributorId":67924,"corporation":false,"usgs":true,"family":"Arthur","given":"J.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":424705,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wood, H.A.R.","contributorId":10623,"corporation":false,"usgs":true,"family":"Wood","given":"H.A.R.","email":"","affiliations":[],"preferred":false,"id":424703,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Baker, A.E.","contributorId":54022,"corporation":false,"usgs":true,"family":"Baker","given":"A.E.","email":"","affiliations":[],"preferred":false,"id":424704,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cichon, J.R.","contributorId":68115,"corporation":false,"usgs":true,"family":"Cichon","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":424706,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Raines, G. L.","contributorId":90720,"corporation":false,"usgs":true,"family":"Raines","given":"G.","middleInitial":"L.","affiliations":[],"preferred":false,"id":424707,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70029851,"text":"70029851 - 2007 - Structure-specific scalar intensity measures for near-source and ordinary earthquake ground motions","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029851","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1436,"text":"Earthquake Spectra","active":true,"publicationSubtype":{"id":10}},"title":"Structure-specific scalar intensity measures for near-source and ordinary earthquake ground motions","docAbstract":"Introduced in this paper are several alternative ground-motion intensity measures (IMs) that are intended for use in assessing the seismic performance of a structure at a site susceptible to near-source and/or ordinary ground motions. A comparison of such IMs is facilitated by defining the \"efficiency\" and \"sufficiency\" of an IM, both of which are criteria necessary for ensuring the accuracy of the structural performance assessment. The efficiency and sufficiency of each alternative IM, which are quantified via (i) nonlinear dynamic analyses of the structure under a suite of earthquake records and (ii) linear regression analysis, are demonstrated for the drift response of three different moderate- to long-period buildings subjected to suites of ordinary and of near-source earthquake records. One of the alternative IMs in particular is found to be relatively efficient and sufficient for the range of buildings considered and for both the near-source and ordinary ground motions. ?? 2007, Earthquake Engineering Research Institute.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Earthquake Spectra","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1193/1.2723158","issn":"87552930","usgsCitation":"Luco, N., and Cornell, C., 2007, Structure-specific scalar intensity measures for near-source and ordinary earthquake ground motions: Earthquake Spectra, v. 23, no. 2, p. 357-392, https://doi.org/10.1193/1.2723158.","startPage":"357","endPage":"392","numberOfPages":"36","costCenters":[],"links":[{"id":212951,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1193/1.2723158"},{"id":240521,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-05-01","publicationStatus":"PW","scienceBaseUri":"505b9c79e4b08c986b31d405","contributors":{"authors":[{"text":"Luco, N.","contributorId":34240,"corporation":false,"usgs":true,"family":"Luco","given":"N.","email":"","affiliations":[],"preferred":false,"id":424583,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cornell, C.A.","contributorId":36238,"corporation":false,"usgs":true,"family":"Cornell","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":424584,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70029853,"text":"70029853 - 2007 - Effects of prolonged exposure to perchlorate on thyroid and reproductive function in zebrafish","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70029853","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3608,"text":"Toxicological Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Effects of prolonged exposure to perchlorate on thyroid and reproductive function in zebrafish","docAbstract":"The objectives of this study were to determine the effects of prolonged exposure to perchlorate on (1) thyroid status and reproductive performance of adult zebrafish (Danio rerio) and (2) F1 embryo survival and early larval development. Using a static-renewal procedure, mixed sex populations of adult zebrafish were exposed to 0, 10, and 100 mg/l nominal concentrations of waterborne perchlorate for 10 weeks. Thyroid histology was qualitatively assessed, and females and males were separated and further exposed to their respective treatments for six additional weeks. Eight females in each tank replicate (n = 3) were paired weekly with four males from the same respective treatment, and packed-egg (spawn) volume (PEV) was measured each of the last five weeks. At least once during weeks 14-16 of exposure, other end points measured included fertilization rate, fertilized egg diameter, hatching rate, standard length, and craniofacial development of 4-day-postfertilization larvae and thyroid hormone content of 3.5-h embryos and of exposed mothers. At 10 weeks of exposure, perchlorate at both concentrations caused thyroidal hypertrophy and colloid depletion. A marked reduction in PEV was observed toward the end of the 6-week spawning period, but fertilization and embryo hatching rates were unaffected. Fertilized egg diameter and larval length were increased by parental exposure to perchlorate. Larval head depth was unaffected but the forward protrusion of the lower jaw-associated cartilage complexes, Meckel's and ceratohyal, was decreased. Exposure to both concentrations of perchlorate inhibited whole-body thyroxine content in mothers and embryos, but triiodothyronine content was unchanged. In conclusion, prolonged exposure of adult zebrafish to perchlorate not only disrupts their thyroid endocrine system but also impairs reproduction and influences early F1 development. ?? 2007 Oxford University Press.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Toxicological Sciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1093/toxsci/kfm001","issn":"10966080","usgsCitation":"Mukhi, S., and Patino, R., 2007, Effects of prolonged exposure to perchlorate on thyroid and reproductive function in zebrafish: Toxicological Sciences, v. 96, no. 2, p. 246-254, https://doi.org/10.1093/toxsci/kfm001.","startPage":"246","endPage":"254","numberOfPages":"9","costCenters":[],"links":[{"id":477218,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1093/toxsci/kfm001","text":"Publisher Index Page"},{"id":212978,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1093/toxsci/kfm001"},{"id":240553,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"96","issue":"2","noUsgsAuthors":false,"publicationDate":"2006-10-31","publicationStatus":"PW","scienceBaseUri":"505a078fe4b0c8380cd5175f","contributors":{"authors":[{"text":"Mukhi, S.","contributorId":83721,"corporation":false,"usgs":true,"family":"Mukhi","given":"S.","affiliations":[],"preferred":false,"id":424588,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Patino, R.","contributorId":39915,"corporation":false,"usgs":true,"family":"Patino","given":"R.","email":"","affiliations":[],"preferred":false,"id":424587,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70029956,"text":"70029956 - 2007 - Restoring coastal wetlands that were ditched for mosquito control: a preliminary assessment of hydro-leveling as a restoration technique","interactions":[],"lastModifiedDate":"2014-09-16T15:37:40","indexId":"70029956","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2219,"text":"Journal of Coastal Conservation","active":true,"publicationSubtype":{"id":10}},"title":"Restoring coastal wetlands that were ditched for mosquito control: a preliminary assessment of hydro-leveling as a restoration technique","docAbstract":"The wetlands surrounding Tampa Bay, Florida were extensively ditched for mosquito control in the 1950s. Spoil from ditch construction was placed adjacent to the wetlands ditches creating mound-like features (spoil-mounds). These mounds represent a loss of 14% of the wetland area in Tampa Bay. Spoil mounds interfere with tidal flow and are locations for non-native plants to colonize (e.g., Schinus terebinthifolius). Removal of the spoil mounds to eliminate exotic plants, restore native vegetation, and re-establish natural hydrology is a restoration priority for environmental managers. Hydro-leveling, a new technique, was tested in a mangrove forest restoration project in 2004. Hydro-leveling uses a high pressure stream of water to wash sediment from the spoil mound into the adjacent wetland and ditch. To assess the effectiveness of this technique, we conducted vegetation surveys in areas that were hydro-leveled and in non-hydro-leveled areas 3 years post-project. Adult Schinus were reduced but not eliminated from hydro-leveled mounds. Schinus seedlings however were absent from hydro-leveled sites. Colonization by native species was sparse. Mangrove seedlings were essentially absent (≈2 m−2) from the centers of hydro-leveled mounds and were in low density on their edges (17 m−2) in comparison to surrounding mangrove forests (105 m−2). Hydro-leveling resulted in mortality of mangroves adjacent to the mounds being leveled. This was probably caused by burial of pneumatophores during the hydro-leveling process. For hydro-leveling to be a useful and successful restoration technique several requirements must be met. Spoil mounds must be lowered to the level of the surrounding wetlands. Spoil must be distributed further into the adjacent wetland to prevent burial of nearby native vegetation. Finally, native species may need to be planted on hydro-leveled areas to speed up the re-vegetation process.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Coastal Conservation","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Springer","doi":"10.1007/s11852-007-0007-2","issn":"14000350","usgsCitation":"Smith, T.J., Tiling, G., and Leasure, P.S., 2007, Restoring coastal wetlands that were ditched for mosquito control: a preliminary assessment of hydro-leveling as a restoration technique: Journal of Coastal Conservation, v. 11, no. 1, p. 67-74, https://doi.org/10.1007/s11852-007-0007-2.","productDescription":"8 p.","startPage":"67","endPage":"74","numberOfPages":"8","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":213044,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11852-007-0007-2"},{"id":240624,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-09-18","publicationStatus":"PW","scienceBaseUri":"505aaadce4b0c8380cd86586","contributors":{"authors":[{"text":"Smith, Thomas J. III tom_j_smith@usgs.gov","contributorId":1615,"corporation":false,"usgs":true,"family":"Smith","given":"Thomas","suffix":"III","email":"tom_j_smith@usgs.gov","middleInitial":"J.","affiliations":[{"id":566,"text":"Southeast Ecological Science Center","active":true,"usgs":true}],"preferred":false,"id":425059,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tiling, Ginger","contributorId":82787,"corporation":false,"usgs":true,"family":"Tiling","given":"Ginger","email":"","affiliations":[],"preferred":false,"id":425061,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Leasure, Pamela S.","contributorId":50732,"corporation":false,"usgs":true,"family":"Leasure","given":"Pamela","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":425060,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70029958,"text":"70029958 - 2007 - Geomorphic and sedimentologic evidence for the separation of Lake Superior from Lake Michigan and Huron","interactions":[],"lastModifiedDate":"2016-05-02T10:16:08","indexId":"70029958","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2411,"text":"Journal of Paleolimnology","active":true,"publicationSubtype":{"id":10}},"title":"Geomorphic and sedimentologic evidence for the separation of Lake Superior from Lake Michigan and Huron","docAbstract":"A common break was recognized in four Lake Superior strandplain sequences using geomorphic and sedimentologic characteristics. Strandplains were divided into lakeward and landward sets of beach ridges using aerial photographs and topographic surveys to identify similar surficial features and core data to identify similar subsurface features. Cross-strandplain, elevation-trend changes from a lowering towards the lake in the landward set of beach ridges to a rise or reduction of slope towards the lake in the lakeward set of beach ridges indicates that the break is associated with an outlet change for Lake Superior. Correlation of this break between study sites and age model results for the strandplain sequences suggest that the outlet change occurred sometime after about 2,400 calendar years ago (after the Algoma phase). Age model results from one site (Grand Traverse Bay) suggest an alternate age closer to about 1,200 calendar years ago but age models need to be investigated further. The landward part of the strandplain was deposited when water levels were common in all three upper Great Lakes basins (Superior, Huron, and Michigan) and drained through the Port Huron/Sarnia outlet. The lakeward part was deposited after the Sault outlet started to help regulate water levels in the Lake Superior basin. The landward beach ridges are commonly better defined and continuous across the embayments, more numerous, larger in relief, wider, have greater vegetation density, and intervening swales contain more standing water and peat than the lakeward set. Changes in drainage patterns, foreshore sediment thickness and grain size help in identifying the break between sets in the strandplain sequences. Investigation of these breaks may help identify possible gaps in the record or missing ridges in strandplain sequences that may not be apparent when viewing age distributions and may justify the need for multiple age and glacial isostatic adjustment models. ?? 2006 Springer Science+Business Media B.V.
","language":"English","publisher":"Springer","doi":"10.1007/s10933-006-9052-3","issn":"09212728","usgsCitation":"Johnston, J., Thompson, T., Wilcox, D., and Baedke, S., 2007, Geomorphic and sedimentologic evidence for the separation of Lake Superior from Lake Michigan and Huron: Journal of Paleolimnology, v. 37, no. 3, p. 349-364, https://doi.org/10.1007/s10933-006-9052-3.","productDescription":"16 p.","startPage":"349","endPage":"364","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":476986,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"http://hdl.handle.net/20.500.12648/2302","text":"External Repository"},{"id":240655,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213070,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10933-006-9052-3"}],"volume":"37","issue":"3","noUsgsAuthors":false,"publicationDate":"2006-12-16","publicationStatus":"PW","scienceBaseUri":"505a277fe4b0c8380cd5993d","contributors":{"authors":[{"text":"Johnston, J.W.","contributorId":67260,"corporation":false,"usgs":true,"family":"Johnston","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":425067,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thompson, T.A.","contributorId":73226,"corporation":false,"usgs":true,"family":"Thompson","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":425068,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wilcox, D.A.","contributorId":55382,"corporation":false,"usgs":true,"family":"Wilcox","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":425066,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Baedke, S.J.","contributorId":14585,"corporation":false,"usgs":true,"family":"Baedke","given":"S.J.","affiliations":[],"preferred":false,"id":425065,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70194942,"text":"70194942 - 2007 - Integrated ground-water monitoring strategy for NRC-licensed facilities and sites: Case study applications","interactions":[],"lastModifiedDate":"2020-01-26T10:58:50","indexId":"70194942","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":1,"text":"Federal Government Series"},"seriesNumber":"NUREG/CR-6948, Vol. 2","title":"Integrated ground-water monitoring strategy for NRC-licensed facilities and sites: Case study applications","docAbstract":"This document discusses results of applying the Integrated Ground-Water Monitoring Strategy (the Strategy) to actual waste sites using existing field characterization and monitoring data. The Strategy is a systematic approach to dealing with complex sites. Application of such a systematic approach will reduce uncertainty associated with site analysis, and therefore uncertainty associated with management decisions about a site. The Strategy can be used to guide the development of a ground-water monitoring program or to review an existing one. The sites selected for study fall within a wide range of geologic and climatic settings, waste compositions, and site design characteristics and represent realistic cases that might be encountered by the NRC. No one case study illustrates a comprehensive application of the Strategy using all available site data. Rather, within each case study we focus on certain aspects of the Strategy, to illustrate concepts that can be applied generically to all sites. The test sites selected include:
A Data Analysis section provides examples of detailed data analysis of monitoring data.
We examined the relationship between attributes of nest sites used by Canada Geese (Branta canadensis) in the Copper River Delta, Alaska, and patterns in nest and female survival. We aimed to determine whether nest site attributes related to nest and female survival differed and whether nest site attributes related to nest survival changed within and among years. Nest site attributes that we examined included vegetation at and surrounding the nest, as well as associations with other nesting birds. Optimal nest site characteristics were different depending on whether nest survival or female survival was examined. Prior to 25 May, the odds of daily survival for nests in tall shrubs and on islands were 2.92 and 2.26 times greater, respectively, than for nests in short shrub sites. Bald Eagles (Halieaeetus leucocephalus) are the major predator during the early breeding season and their behavior was likely important in determining this pattern. After 25 May, when eagle predation is limited due to the availability of alternative prey, no differences in nest survival among the nest site types were found. In addition, nest survival was positively related to the density of other Canada Goose nests near the nest site. Although the number of detected mortalities for females was relatively low, a clear pattern was found, with mortality three times more likely at nest sites dominated by high shrub density within 50 m than at open sites dominated by low shrub density. The negative relationship of nest concealment and adult survival is consistent with that found in other studies of ground-nesting birds. Physical barriers that limited access to nest sites by predators and sites that allowed for early detection of predators were important characteristics of nest site quality for Canada Geese and nest site quality shifted within seasons, likely as a result of shifting predator-prey interactions.
","language":"English","publisher":"Cooper Ornithological Society","doi":"10.1650/0010-5422(2007)109[769:ONSAFS]2.0.CO;2","issn":"00105422","usgsCitation":"Miller, D.A., Grand, J., Fondell, T., and Anthony, R.M., 2007, Optimizing nest survival and female survival: Consequences of nest site selection for Canada Geese: Condor, v. 109, no. 4, p. 769-780, https://doi.org/10.1650/0010-5422(2007)109[769:ONSAFS]2.0.CO;2.","productDescription":"12 p.","startPage":"769","endPage":"780","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":476988,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1650/0010-5422(2007)109[769:onsafs]2.0.co;2","text":"Publisher Index Page"},{"id":240583,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213003,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1650/0010-5422(2007)109[769:ONSAFS]2.0.CO;2"}],"volume":"109","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6f07e4b0c8380cd758fe","contributors":{"authors":[{"text":"Miller, David A.","contributorId":29193,"corporation":false,"usgs":false,"family":"Miller","given":"David","email":"","middleInitial":"A.","affiliations":[{"id":6911,"text":"Iowa State University","active":true,"usgs":false}],"preferred":false,"id":424591,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Grand, J.B.","contributorId":11150,"corporation":false,"usgs":true,"family":"Grand","given":"J.B.","email":"","affiliations":[],"preferred":false,"id":424589,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fondell, T.F.","contributorId":11154,"corporation":false,"usgs":true,"family":"Fondell","given":"T.F.","email":"","affiliations":[],"preferred":false,"id":424590,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Anthony, R. Michael","contributorId":54535,"corporation":false,"usgs":false,"family":"Anthony","given":"R.","email":"","middleInitial":"Michael","affiliations":[],"preferred":false,"id":424592,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70030119,"text":"70030119 - 2007 - Visible and near-infrared multispectral analysis of rocks at Meridiani Planum, Mars, by the Mars Exploration Rover Opportunity","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70030119","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2317,"text":"Journal of Geophysical Research E: Planets","active":true,"publicationSubtype":{"id":10}},"title":"Visible and near-infrared multispectral analysis of rocks at Meridiani Planum, Mars, by the Mars Exploration Rover Opportunity","docAbstract":"Multispectral measurements in the visible and near infrared of rocks at Meridiani Planum by the Mars Exploration Rover Opportunity's Pancam are described. The Pancam multispectral data show that the outcrops of the Burns formation consist of two main spectral units which in stretched 673, 535, 432 nm color composites appear buff- and purple-colored. These units are referred to as the HFS and LFS spectral units based on higher and lower values of 482 to 535 nm slope. Spectral characteristics are consistent with the LFS outcrop consisting of less oxidized, and the HFS outcrop consisting of more oxidized, iron-bearing minerals. The LFS surfaces are not as common and appear, primarily, at the distal ends of outcrop layers and on steep, more massive surfaces, locations that are subject to greater eolian erosion. Consequently, the HFS surfaces are interpreted as a weathering rind. Further inherent spectral differences between layer's and between different outcrop map units, both untouched and patches abraded by the rover's Rock Abrasion Tool, are also described. Comparisons of the spectral parameters of the Meridiani outcrop with a set of laboratory reflectance measurements of Fe3+-bearing minerals show that the field of outcrop measurements plots near the fields of hematite, ferrihydrite, poorly crystalline goethite, and schwertmannite. Rind and fracture fill materials, observed intermittently at outcrop exposures, are intermediate in their spectral character between both the HFS and LFS spectral classes and other, less oxidized, surface materials (basaltic sands, spherules, and cobbles). Copyright 2007 by the American Geophysical Union.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research E: Planets","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006JE002773","issn":"01480227","usgsCitation":"Farrand, W.H., Bell, J., Johnson, J.R., Jolliff, B., Knoll, A., McLennan, S.M., Squyres, S.W., Calvin, W.M., Grotzinger, J., Morris, R., Soderblom, J., Thompson, S., Watters, W., and Yen, A.S., 2007, Visible and near-infrared multispectral analysis of rocks at Meridiani Planum, Mars, by the Mars Exploration Rover Opportunity: Journal of Geophysical Research E: Planets, v. 112, no. 6, https://doi.org/10.1029/2006JE002773.","costCenters":[],"links":[{"id":476980,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006je002773","text":"Publisher Index Page"},{"id":212992,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006JE002773"},{"id":240568,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"112","issue":"6","noUsgsAuthors":false,"publicationDate":"2007-04-26","publicationStatus":"PW","scienceBaseUri":"505bc289e4b08c986b32abda","contributors":{"authors":[{"text":"Farrand, W. H.","contributorId":64372,"corporation":false,"usgs":true,"family":"Farrand","given":"W.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":425789,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bell, J.F. III","contributorId":97612,"corporation":false,"usgs":true,"family":"Bell","given":"J.F.","suffix":"III","email":"","affiliations":[],"preferred":false,"id":425795,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johnson, J. R.","contributorId":69278,"corporation":false,"usgs":true,"family":"Johnson","given":"J.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":425790,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jolliff, B.L.","contributorId":21268,"corporation":false,"usgs":true,"family":"Jolliff","given":"B.L.","email":"","affiliations":[],"preferred":false,"id":425784,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Knoll, A.H.","contributorId":84885,"corporation":false,"usgs":true,"family":"Knoll","given":"A.H.","email":"","affiliations":[],"preferred":false,"id":425792,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"McLennan, S. M.","contributorId":96733,"corporation":false,"usgs":true,"family":"McLennan","given":"S.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":425794,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Squyres, S. W.","contributorId":31836,"corporation":false,"usgs":true,"family":"Squyres","given":"S.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":425785,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Calvin, W. M.","contributorId":17379,"corporation":false,"usgs":false,"family":"Calvin","given":"W.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":425783,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Grotzinger, J.P.","contributorId":76053,"corporation":false,"usgs":true,"family":"Grotzinger","given":"J.P.","affiliations":[],"preferred":false,"id":425791,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Morris, R.V.","contributorId":6978,"corporation":false,"usgs":true,"family":"Morris","given":"R.V.","affiliations":[],"preferred":false,"id":425782,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Soderblom, J.","contributorId":52699,"corporation":false,"usgs":false,"family":"Soderblom","given":"J.","affiliations":[],"preferred":false,"id":425787,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Thompson, S.D.","contributorId":63511,"corporation":false,"usgs":true,"family":"Thompson","given":"S.D.","email":"","affiliations":[],"preferred":false,"id":425788,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Watters, W.A.","contributorId":86542,"corporation":false,"usgs":true,"family":"Watters","given":"W.A.","email":"","affiliations":[],"preferred":false,"id":425793,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Yen, A. S.","contributorId":35860,"corporation":false,"usgs":true,"family":"Yen","given":"A.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":425786,"contributorType":{"id":1,"text":"Authors"},"rank":14}]}} ,{"id":70192571,"text":"70192571 - 2007 - Characterization of nutrient, organic carbon, and sediment loads and concentrations from the Mississippi River into the northern Gulf of Mexico","interactions":[],"lastModifiedDate":"2017-10-26T14:58:44","indexId":"70192571","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1584,"text":"Estuaries and Coasts","active":true,"publicationSubtype":{"id":10}},"title":"Characterization of nutrient, organic carbon, and sediment loads and concentrations from the Mississippi River into the northern Gulf of Mexico","docAbstract":"We synthesize and update the science supporting the Action Plan for Reducing, Mitigating, and Controlling Hypoxia in the Northern Gulf of Mexico (Mississippi River/Gulf of Mexico Watershed Nutrient Task Force 2001) with a focus on the spatial and temporal discharge and patterns of nutrient and organic carbon delivery to the northern Gulf of Mexico, including data through 2006. The discharge of the Mississippi River watershed over 200 years varies but is not demonstrably increasing or decreasing. About 30% of the Mississippi River was shunted westward to form the Atchafalaya River, which redistributed water and nutrient loads on the shelf. Data on nitrogen concentrations from the early 1900s demonstrate that the seasonal and annual concentrations in the lower river have increased considerably since then, including a higher spring loading, following the increase in fertilizer applications after World WarII. The loading of total nitrogen (TN) fell from 1990 to 2006, but the loading of total phosphorus (TP) has risen slightly, resulting in a decline in the TN:TP ratios. The present TN:TP ratios hover around an average indicative of potential nitrogen limitation on phytoplankton growth, or balanced growth limitation, but not phosphorus limitation. The dissolved nitrogen:dissolved silicate ratios are near the Redfield ratio indicative of growth limitations on diatoms. Although nutrient concentrations are relatively high compared to those in many other large rivers, the water quality in the Mississippi River is not unique in that nutrient loads can be described by a variety of land-use models. There is no net removal of nitrogen from water flowing through the Atchafalaya basin, but the concentrations of TP and suspended sediments are lower at the exit point (Morgan City, Louisiana) than in the water entering the Atchafalaya basin. The removal of nutrients entering offshore waters through diversion of river water into wetlands is presently less than 1% of the total loadings going directly offshore, and would be less than 8% if the 10,093 km2 of coastal wetlands were successfully engineered for that purpose. Wetland loss is an insignificant contribution to the carbon loading offshore, compared to in situ marine production. The science-based conclusions in the Action Plan about nutrient loads and sources to the hypoxic zone off Louisiana are sustained by research and monitoring occurring in the subsequent 10 years.
","language":"English","publisher":"Springer","doi":"10.1007/BF02841333","usgsCitation":"Turner, R., Rabalais, N.N., Alexander, R.B., McIsaac, G., and Howarth, R.W., 2007, Characterization of nutrient, organic carbon, and sediment loads and concentrations from the Mississippi River into the northern Gulf of Mexico: Estuaries and Coasts, v. 30, no. 5, p. 773-790, https://doi.org/10.1007/BF02841333.","productDescription":"18 p.","startPage":"773","endPage":"790","ipdsId":"IP-003277","costCenters":[{"id":451,"text":"National Water Quality Assessment Program","active":true,"usgs":true}],"links":[{"id":347502,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Gulf of Mexico, Mississippi River","volume":"30","issue":"5","publishingServiceCenter":{"id":9,"text":"Reston PSC"},"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5a07fcf2e4b09af898c8ce3a","contributors":{"authors":[{"text":"Turner, R.E.","contributorId":39749,"corporation":false,"usgs":false,"family":"Turner","given":"R.E.","email":"","affiliations":[{"id":16756,"text":"Louisiana State University, Baton Rouge, LA","active":true,"usgs":false}],"preferred":false,"id":716458,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rabalais, N. N.","contributorId":198497,"corporation":false,"usgs":false,"family":"Rabalais","given":"N.","email":"","middleInitial":"N.","affiliations":[{"id":12699,"text":"Louisiana Universities Marine Consortium","active":true,"usgs":false}],"preferred":false,"id":716459,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Alexander, Richard B. 0000-0001-9166-0626 ralex@usgs.gov","orcid":"https://orcid.org/0000-0001-9166-0626","contributorId":541,"corporation":false,"usgs":true,"family":"Alexander","given":"Richard","email":"ralex@usgs.gov","middleInitial":"B.","affiliations":[{"id":451,"text":"National Water Quality Assessment Program","active":true,"usgs":true},{"id":503,"text":"Office of Water Quality","active":true,"usgs":true}],"preferred":true,"id":716460,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"McIsaac, G.","contributorId":198496,"corporation":false,"usgs":false,"family":"McIsaac","given":"G.","email":"","affiliations":[{"id":16984,"text":"University of Illinois at Urbana-Champaign","active":true,"usgs":false}],"preferred":false,"id":716461,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Howarth, R. W.","contributorId":48126,"corporation":false,"usgs":false,"family":"Howarth","given":"R.","email":"","middleInitial":"W.","affiliations":[{"id":12722,"text":"Cornell University","active":true,"usgs":false}],"preferred":false,"id":716462,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70160499,"text":"70160499 - 2007 - Feedback effects between the food chain and induced defense strategies: Chapter 11","interactions":[],"lastModifiedDate":"2015-12-21T09:58:56","indexId":"70160499","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"seriesNumber":"1","title":"Feedback effects between the food chain and induced defense strategies: Chapter 11","docAbstract":"No abstract available.
","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"From energetics to ecosystems: The dynamics and structure of ecological systems","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"Springer","doi":"10.1007/978-1-4020-5337-5_11","usgsCitation":"Rooney, N., McCann, K.S., and Noakes, D., 2007, Feedback effects between the food chain and induced defense strategies: Chapter 11, chap. of From energetics to ecosystems: The dynamics and structure of ecological systems, p. 213-235, https://doi.org/10.1007/978-1-4020-5337-5_11.","productDescription":"23 p.","startPage":"213","endPage":"235","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":566,"text":"Southeast Ecological Science Center","active":true,"usgs":true}],"links":[{"id":312577,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"567930c7e4b0da412f4fb563","contributors":{"authors":[{"text":"Rooney, Neil","contributorId":150769,"corporation":false,"usgs":false,"family":"Rooney","given":"Neil","email":"","affiliations":[],"preferred":false,"id":583018,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McCann, K. S.","contributorId":150770,"corporation":false,"usgs":false,"family":"McCann","given":"K.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":583019,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Noakes, D.L.G.","contributorId":102674,"corporation":false,"usgs":true,"family":"Noakes","given":"D.L.G.","email":"","affiliations":[],"preferred":false,"id":583020,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":1016425,"text":"1016425 - 2007 - The state of the art in raptor electrocution research: A global review","interactions":[],"lastModifiedDate":"2021-05-19T17:50:21.526996","indexId":"1016425","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1015,"text":"Biological Conservation","active":true,"publicationSubtype":{"id":10}},"title":"The state of the art in raptor electrocution research: A global review","docAbstract":"We systematically reviewed the raptor electrocution literature to evaluate study designs and methods used in raptor electrocution research, mitigation, and monitoring, emphasizing original research published in English. Specifically, we wondered if three decades of effort to reduce raptor electrocutions has had positive effects. The majority of literature examined came from North America, western Europe, and South Africa. In spite of intensive and often sustained effort by industry and governments across three continents for 30 years, reductions in the incidence of electrocution have been demonstrated in only a few studies. Reliable rate estimates of electrocution mortality generally are unavailable, with some exceptions.\r\nNearly half of 110 studies we analyzed in detail were retrospective reviews of historical mortality records, banding data, or results of necropsies on dead birds received at pathology and veterinary facilities. Among prospective studies, less than half used unbiased approaches to sampling and many did not provide enough detail to assess the sampling design used. At this time, few researchers can demonstrate the reliability of standardized retrofitting procedures or the effectiveness of monitoring techniques. Future progress in reducing raptor mortalities on power lines will benefit from properly designed studies that generate rate estimates of mortality, address biasing factors, and include predictions concerning risk and techniques to reduce risk that can be tested in the field or laboratory.","language":"English","publisher":"Elsevier","doi":"10.1016/j.biocon.2006.09.015","usgsCitation":"Lehman, R.N., Kennedy, P., and Savidge, J.A., 2007, The state of the art in raptor electrocution research: A global review: Biological Conservation, v. 136, no. 2, p. 159-174, https://doi.org/10.1016/j.biocon.2006.09.015.","productDescription":"16 p.","startPage":"159","endPage":"174","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":133179,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"136","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a60e4b07f02db635481","contributors":{"authors":[{"text":"Lehman, Robert N.","contributorId":47746,"corporation":false,"usgs":true,"family":"Lehman","given":"Robert","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":324234,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kennedy, P.L.","contributorId":78680,"corporation":false,"usgs":true,"family":"Kennedy","given":"P.L.","email":"","affiliations":[],"preferred":false,"id":324235,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Savidge, J. A.","contributorId":36078,"corporation":false,"usgs":false,"family":"Savidge","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":324233,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70142992,"text":"70142992 - 2007 - Strategies to predict metal mobility in surficial mining environments","interactions":[],"lastModifiedDate":"2015-03-18T14:19:55","indexId":"70142992","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3853,"text":"Reviews in Engineering Geology","active":true,"publicationSubtype":{"id":10}},"title":"Strategies to predict metal mobility in surficial mining environments","docAbstract":"This report presents some strategies to predict metal mobility at mining sites. These strategies are based on chemical, physical, and geochemical information about metals and their interactions with the environment. An overview of conceptual models, metal sources, and relative mobility of metals under different geochemical conditions is presented, followed by a discussion of some important physical and chemical properties of metals that affect their mobility, bioavailability, and toxicity. The physical and chemical properties lead into a discussion of the importance of the chemical speciation of metals. Finally, environmental and geochemical processes and geochemical barriers that affect metal speciation are discussed. Some additional concepts and applications are briefly presented at the end of this report.
","language":"English","publisher":"Geological Society of America","publisherLocation":"Boulder, CO","doi":"10.1130/2007.4017(03)","usgsCitation":"Smith, K.S., 2007, Strategies to predict metal mobility in surficial mining environments: Reviews in Engineering Geology, v. 17, p. 25-45, https://doi.org/10.1130/2007.4017(03).","productDescription":"21 p.","startPage":"25","endPage":"45","numberOfPages":"21","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":298727,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"550aa1bfe4b02e76d7590c06","contributors":{"authors":[{"text":"Smith, Kathleen S. 0000-0001-8547-9804 ksmith@usgs.gov","orcid":"https://orcid.org/0000-0001-8547-9804","contributorId":182,"corporation":false,"usgs":true,"family":"Smith","given":"Kathleen","email":"ksmith@usgs.gov","middleInitial":"S.","affiliations":[{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true}],"preferred":true,"id":542398,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70029727,"text":"70029727 - 2007 - Egg flotation estimates nest age for Pacific and Red-throated Loons","interactions":[],"lastModifiedDate":"2016-06-29T10:26:31","indexId":"70029727","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3731,"text":"Waterbirds","onlineIssn":"19385390","printIssn":"15244695","active":true,"publicationSubtype":{"id":10}},"title":"Egg flotation estimates nest age for Pacific and Red-throated Loons","docAbstract":"We used Pacific Loon (Gavia pacifica) and Red-throated Loon (G. stellata) nests with known ages to gauge the efficacy of egg flotation for determining nest age in coastal Alaska. Egg flotation accurately estimated nest age for both species; the mean ± 1SD difference between known age and age determined with egg flotation was - 0.05 ± 2.00 d and -0.02 ± 1.63 d for Pacific and Red-throated Loons, respectively. Day of nest initiation did not influence the relationship between known nest age and nest age estimated with egg flotation, indicating incubation period was not shortened in nests initiated later in the season. Additionally, we found no difference in the ability of egg flotation to estimate nest age between two widely dispersed study sites for Pacific Loons, and only a small difference between two of three widely dispersed study sites for Red-throated Loons. Thus, our described relationships between egg flotation categories and nest age should be broadly applicable for these holarctic species. We conclude that for Pacific and Red-throated Loons, egg flotation is a useful technique for determining nest age in the field to better monitor nest fate, and to quantify nest age effects on nest daily survival rate.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Waterbirds","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1675/1524-4695(2007)30[207:EFENAF]2.0.CO;2","issn":"15244695","usgsCitation":"Rizzolo, D., and Schmutz, J.A., 2007, Egg flotation estimates nest age for Pacific and Red-throated Loons: Waterbirds, v. 30, no. 2, p. 207-213, https://doi.org/10.1675/1524-4695(2007)30[207:EFENAF]2.0.CO;2.","productDescription":"7 p.","startPage":"207","endPage":"213","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"links":[{"id":240273,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212738,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1675/1524-4695(2007)30[207:EFENAF]2.0.CO;2"}],"volume":"30","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a086be4b0c8380cd51af7","contributors":{"authors":[{"text":"Rizzolo, Daniel drizzolo@usgs.gov","contributorId":5631,"corporation":false,"usgs":true,"family":"Rizzolo","given":"Daniel","email":"drizzolo@usgs.gov","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true}],"preferred":true,"id":424026,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schmutz, Joel A. 0000-0002-6516-0836 jschmutz@usgs.gov","orcid":"https://orcid.org/0000-0002-6516-0836","contributorId":1805,"corporation":false,"usgs":true,"family":"Schmutz","given":"Joel","email":"jschmutz@usgs.gov","middleInitial":"A.","affiliations":[{"id":117,"text":"Alaska Science Center Biology WTEB","active":true,"usgs":true},{"id":114,"text":"Alaska Science Center","active":true,"usgs":true}],"preferred":true,"id":424027,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70029725,"text":"70029725 - 2007 - DOM in recharge waters of the Santa Ana River Basin","interactions":[],"lastModifiedDate":"2021-06-01T16:56:05.966436","indexId":"70029725","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2136,"text":"Journal - American Water Works Association","active":true,"publicationSubtype":{"id":10}},"title":"DOM in recharge waters of the Santa Ana River Basin","docAbstract":"Assessment of the composition, reactivity, and potential health effects of dissolved organic matter (DOM) is an important issue in the regulation and operation of groundwater recharge projects. The composition of DOM in various natural surface waters and reclaimed waters used to recharge the alluvial aquifers of the lower Santa Ana River Basin in California was derived primarily from terpenoid hydrocarbons and amino sugars. Lesser amounts of aromatic sulfonate and alkylphenol polyethoxylate metabolites of anionic and neutral surfactants were detected in reclaimed water, and these metabolites persisted in waters of the Santa Ana River, the Prado Wetland, and the recharge basins. Only small amounts of humic substances derived from tannins and lignins were deposited during storm flow periods in the Prado Wetland, but these amounts were responsible for significant increases in disinfection by-product formation potential in these waters. Colloids composed of bacterial cell wall fragments showed large percentage increases in all waters during storm flow periods.
","language":"English","publisher":"Wiley Online","doi":"10.1002/j.1551-8833.2007.tb07960.x","usgsCitation":"Leenheer, J., Aiken, G., Woodside, G., and O’Connor-Patel, K., 2007, DOM in recharge waters of the Santa Ana River Basin: Journal - American Water Works Association, v. 99, no. 6, p. 118-131, https://doi.org/10.1002/j.1551-8833.2007.tb07960.x.","productDescription":"14 p.","startPage":"118","endPage":"131","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":240271,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Santa Ana River Basin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -117.828369140625,\n 33.71977077483141\n ],\n [\n -116.85607910156249,\n 33.71977077483141\n ],\n [\n -116.85607910156249,\n 34.14363482031264\n ],\n [\n -117.828369140625,\n 34.14363482031264\n ],\n [\n -117.828369140625,\n 33.71977077483141\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"99","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fd51e4b0c8380cd4e787","contributors":{"authors":[{"text":"Leenheer, J.A.","contributorId":75123,"corporation":false,"usgs":true,"family":"Leenheer","given":"J.A.","affiliations":[],"preferred":false,"id":424021,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Aiken, G. R. 0000-0001-8454-0984","orcid":"https://orcid.org/0000-0001-8454-0984","contributorId":14452,"corporation":false,"usgs":true,"family":"Aiken","given":"G. R.","affiliations":[],"preferred":false,"id":424020,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Woodside, G.","contributorId":83406,"corporation":false,"usgs":true,"family":"Woodside","given":"G.","email":"","affiliations":[],"preferred":false,"id":424022,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"O’Connor-Patel, K.","contributorId":97391,"corporation":false,"usgs":true,"family":"O’Connor-Patel","given":"K.","email":"","affiliations":[],"preferred":false,"id":424023,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70029860,"text":"70029860 - 2007 - Functional groups in a single pteridosperm species: Variability and circumscription (Pennsylvanian, Nova Scotia, Canada)","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029860","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2033,"text":"International Journal of Coal Geology","active":true,"publicationSubtype":{"id":10}},"title":"Functional groups in a single pteridosperm species: Variability and circumscription (Pennsylvanian, Nova Scotia, Canada)","docAbstract":"Multiple foliar specimens of the Late Pennsylvanian fossil pteridosperm [gymnosperm] Alethopteris zeilleri (Ragot) Wagner were collected from one restricted stratigraphical horizon in the Canadian Sydney Coalfield. Variability of functional-group distribution using FTIR technique was studied in compressions, adaxial versus abaxial cuticles, and in unseparated cuticles as a function of maceration time from 48 to 168??h. The results obtained document spectral variability that could be expected within specimens of one species. For example, CH2/CH3 and Al/ox ratios can differ by as much as 20% of the values. Moreover, the experiments performed confirm that by using a previously established maceration protocol, long maceration periods do not bias FTIR spectra in terms of oxygenation overprinting. The inference that this cuticle is robust, under the given diagenetic level, probably reflects a reassuring degree of chemical fidelity of the Pennsylvanian plant to support Carboniferous chemotaxonomic observations. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Journal of Coal Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.coal.2006.06.010","issn":"01665162","usgsCitation":"Zodrow, E., and Mastalerz, M., 2007, Functional groups in a single pteridosperm species: Variability and circumscription (Pennsylvanian, Nova Scotia, Canada): International Journal of Coal Geology, v. 70, no. 4, p. 313-324, https://doi.org/10.1016/j.coal.2006.06.010.","startPage":"313","endPage":"324","numberOfPages":"12","costCenters":[],"links":[{"id":212656,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.coal.2006.06.010"},{"id":240177,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"70","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1413e4b0c8380cd548c4","contributors":{"authors":[{"text":"Zodrow, E.L.","contributorId":99328,"corporation":false,"usgs":true,"family":"Zodrow","given":"E.L.","email":"","affiliations":[],"preferred":false,"id":424634,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mastalerz, Maria","contributorId":78065,"corporation":false,"usgs":true,"family":"Mastalerz","given":"Maria","affiliations":[],"preferred":false,"id":424633,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70029723,"text":"70029723 - 2007 - Flux and age of dissolved organic carbon exported to the Arctic Ocean: A carbon isotopic study of the five largest arctic rivers","interactions":[],"lastModifiedDate":"2018-01-31T10:46:19","indexId":"70029723","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1836,"text":"Global Biogeochemical Cycles","active":true,"publicationSubtype":{"id":10}},"title":"Flux and age of dissolved organic carbon exported to the Arctic Ocean: A carbon isotopic study of the five largest arctic rivers","docAbstract":"The export and Δ14C-age of dissolved organic carbon (DOC) was determined for the Yenisey, Lena, Ob', Mackenzie, and Yukon rivers for 2004–2005. Concentrations of DOC elevate significantly with increasing discharge in these rivers, causing approximately 60% of the annual export to occur during a 2-month period following spring ice breakup. We present a total annual flux from the five rivers of ∼16 teragrams (Tg), and conservatively estimate that the total input of DOC to the Arctic Ocean is 25–36 Tg, which is ∼5–20% greater than previous fluxes. These fluxes are also ∼2.5× greater than temperate rivers with similar watershed sizes and water discharge. Δ14C-DOC shows a clear relationship with hydrology. A small pool of DOC slightly depleted in Δ14C is exported with base flow. The large pool exported with spring thaw is enriched in Δ14C with respect to current-day atmospheric Δ14C-CO2 values. A simple model predicts that ∼50% of DOC exported during the arctic spring thaw is 1–5 years old, ∼25% is 6–10 years in age, and 15% is 11–20 years old. The dominant spring melt period, a historically undersampled period, exports a large amount of young and presumably semilabile DOC to the Arctic Ocean.
","language":"English","publisher":"AGU","doi":"10.1029/2007GB002934","issn":"08866236","usgsCitation":"Raymond, P., McClelland, J., Holmes, R., Zhulidov, A., Mull, K., Peterson, B.J., Striegl, R.G., Aiken, G., and Gurtovaya, T., 2007, Flux and age of dissolved organic carbon exported to the Arctic Ocean: A carbon isotopic study of the five largest arctic rivers: Global Biogeochemical Cycles, v. 21, no. 4, https://doi.org/10.1029/2007GB002934.","costCenters":[],"links":[{"id":240235,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212708,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007GB002934"}],"volume":"21","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-11-02","publicationStatus":"PW","scienceBaseUri":"505a12a7e4b0c8380cd543b0","contributors":{"authors":[{"text":"Raymond, P.A.","contributorId":62013,"corporation":false,"usgs":true,"family":"Raymond","given":"P.A.","affiliations":[],"preferred":false,"id":424010,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McClelland, J.W.","contributorId":62015,"corporation":false,"usgs":true,"family":"McClelland","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":424011,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Holmes, R.M.","contributorId":66485,"corporation":false,"usgs":true,"family":"Holmes","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":424012,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Zhulidov, A.V.","contributorId":60020,"corporation":false,"usgs":true,"family":"Zhulidov","given":"A.V.","email":"","affiliations":[],"preferred":false,"id":424009,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mull, K.","contributorId":17045,"corporation":false,"usgs":true,"family":"Mull","given":"K.","email":"","affiliations":[],"preferred":false,"id":424006,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Peterson, B. J.","contributorId":53749,"corporation":false,"usgs":false,"family":"Peterson","given":"B.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":424008,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Striegl, Robert G. 0000-0002-8251-4659 rstriegl@usgs.gov","orcid":"https://orcid.org/0000-0002-8251-4659","contributorId":1630,"corporation":false,"usgs":true,"family":"Striegl","given":"Robert","email":"rstriegl@usgs.gov","middleInitial":"G.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true},{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true}],"preferred":false,"id":424013,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Aiken, G. R. 0000-0001-8454-0984","orcid":"https://orcid.org/0000-0001-8454-0984","contributorId":14452,"corporation":false,"usgs":true,"family":"Aiken","given":"G. R.","affiliations":[],"preferred":false,"id":424005,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Gurtovaya, T.Y.","contributorId":53604,"corporation":false,"usgs":true,"family":"Gurtovaya","given":"T.Y.","email":"","affiliations":[],"preferred":false,"id":424007,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}} ,{"id":70029729,"text":"70029729 - 2007 - Understanding shallow gas occurrences in the Gulf of Lions","interactions":[],"lastModifiedDate":"2023-08-08T11:11:14.774827","indexId":"70029729","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1742,"text":"Geo-Marine Letters","active":true,"publicationSubtype":{"id":10}},"title":"Understanding shallow gas occurrences in the Gulf of Lions","docAbstract":"New coring data have been acquired along the western Gulf of Lions showing anomalous concentrations of methane (up to 95,700 ppm) off the Rhône prodelta and the head of the southern canyons Lacaze-Duthiers and Cap de Creus. Sediment cores were acquired with box and kasten cores during 2004–2005 on several EuroSTRATAFORM cruises. Anomalous methane concentrations are discussed and integrated with organic carbon data. Sampled sites include locations where previous surveys identified acoustic anomalies in high-resolution seismic profiles, which may be related to the presence of gas. Interpretation of the collected data has enabled us to discuss the nature of shallow gas along the Gulf of Lions, and its association with recent sedimentary dynamics. The Rhône prodelta flood deposits deliver significant amounts of terrigenous organic matter that can be rapidly buried, effectively removing this organic matter from aerobic oxidation and biological uptake, and leading to the potential for methanogenesis with burial. Away from the flood-related sediments off the Rhône delta, the organic matter is being reworked and remineralized on its way along the western coast of the Gulf of Lions, with the result that the recent deposits in the canyon contain little reactive carbon. In the southernmost canyons, Lacaze-Duthiers and Cap de Creus, the gas analyses show relatively little shallow gas in the core samples. Samples with anomalous gas (up to 5,000 ppm methane) are limited to local areas where the samples also show higher amounts of organic matter. The anomalous samples at the head of the southern canyons may be related to methanogenesis of recent drape or of older sidewall canyon infills.
The Office de la Haute Vallée du Fleuve Niger (OHVN) zone in southern Mali is a small but important agricultural production region. Against a background of environmental degradation including decades of declining rainfall, soil erosion, and human pressure on forest resources, numerous farming communities stand out through the use of improved soil and water management practices that have improved agricultural and environmental conditions. Field surveys conducted in 1998–2001 indicated that environmental and agricultural conditions have improved in the past decade. In an effort to better quantify environmental trends, we conducted a study using medium- and high-resolution remotely sensed images from 1965 to 2001 in order to analyze land use and land cover trends in 21 village territories. The trends show clear indications of agricultural intensification and diversification among villages that have received assistance from the OHVN agricultural development agency. Some communities have improved environmental conditions by protecting their forest resources through community management actions. Four decades of remotely sensed images played a practical role in tracking and quantifying environmental and agricultural conditions over time.
","language":"English","publisher":"Elsevier","doi":"10.1016/j.agsy.2005.07.011","issn":"0308521X","usgsCitation":"Tappan, G., and McGahuey, M., 2007, Tracking environmental dynamics and agricultural intensification in southern Mali: Agricultural Systems, v. 94, no. 1, p. 38-51, https://doi.org/10.1016/j.agsy.2005.07.011.","productDescription":"14 p.","startPage":"38","endPage":"51","numberOfPages":"14","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":240552,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212977,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.agsy.2005.07.011"}],"volume":"94","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb6a0e4b08c986b326daa","contributors":{"authors":[{"text":"Tappan, G. Gray 0000-0002-2240-6963","orcid":"https://orcid.org/0000-0002-2240-6963","contributorId":147662,"corporation":false,"usgs":true,"family":"Tappan","given":"G. Gray","affiliations":[],"preferred":false,"id":424586,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McGahuey, M.","contributorId":18580,"corporation":false,"usgs":true,"family":"McGahuey","given":"M.","affiliations":[],"preferred":false,"id":424585,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70029719,"text":"70029719 - 2007 - Shoreline change as a proxy for subaerial beach volume change","interactions":[],"lastModifiedDate":"2018-04-09T12:36:18","indexId":"70029719","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2220,"text":"Journal of Coastal Research","active":true,"publicationSubtype":{"id":10}},"title":"Shoreline change as a proxy for subaerial beach volume change","docAbstract":"It is difficult and expensive to calculate changes in sediment volume for large sections of sandy beaches. Shoreline change could be a useful proxy for volume change because it can be collected quickly and relatively easily over long distances. In this paper, we summarize several studies that find a high correlation between shoreline change and subaerial volume change. We also examine three new data sets. On Cape Cod, Massachusetts, the correlation coefficients between the time series of shoreline change and subaerial volume change at two locations are 0.73 and 0.96. On Assateague Island, the correlation coefficient between along-coast variations in shoreline change and subaerial volume change is 0.71. On the Outer Banks of North Carolina, the average correlation coefficient between temporal variations in shoreline change and subaerial volume change is 0.84. For spatial variations, the average correlation coefficient is 0.88. It is therefore concluded that shoreline change is a useful proxy for subaerial volume change.
","language":"English","publisher":"Coastal Education and Research Foundation","doi":"10.2112/05-0442.1","issn":"07490208","usgsCitation":"Farris, A., and List, J., 2007, Shoreline change as a proxy for subaerial beach volume change: Journal of Coastal Research, v. 23, no. 3, p. 740-748, https://doi.org/10.2112/05-0442.1.","productDescription":"9 p.","startPage":"740","endPage":"748","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true},{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":477100,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.2112/05-0442.1","text":"Publisher Index Page"},{"id":240168,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Massachusetts, Maryland, North Carolina, Virginia","city":"Cape Cod","otherGeospatial":"Assateague Island, Outer Banks","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -76.5,35.75 ], [ -76.5,42.083333 ], [ -69.833333,42.083333 ], [ -69.833333,35.75 ], [ -76.5,35.75 ] ] ] } } ] }","volume":"23","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8e91e4b08c986b3189f1","contributors":{"authors":[{"text":"Farris, Amy S.","contributorId":28075,"corporation":false,"usgs":true,"family":"Farris","given":"Amy S.","affiliations":[],"preferred":false,"id":423992,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"List, Jeffrey H. jlist@usgs.gov","contributorId":2416,"corporation":false,"usgs":true,"family":"List","given":"Jeffrey H.","email":"jlist@usgs.gov","affiliations":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"preferred":false,"id":423991,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ]}