No abstract available.
","largerWorkTitle":"Ambio","language":"English","publisher":"Royal Swedish Academy of Sciences","doi":"10.1579/0044-7447(2007)36[2:PTTMDA]2.0.CO;2","issn":"00447447","usgsCitation":"Hurley, J., Krabbenhoft, D., Wiener, J.G., and Babiarz, C., 2007, Preface to the Madison declaration and critical synthesis papers on mercury pollution: Ambio, v. 36, no. 1, p. 2-2, https://doi.org/10.1579/0044-7447(2007)36[2:PTTMDA]2.0.CO;2.","productDescription":"1 p.","startPage":"2","endPage":"2","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240786,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213185,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1579/0044-7447(2007)36[2:PTTMDA]2.0.CO;2"}],"volume":"36","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8214e4b0c8380cd7b8c4","contributors":{"authors":[{"text":"Hurley, James P.","contributorId":147931,"corporation":false,"usgs":false,"family":"Hurley","given":"James P.","affiliations":[{"id":6913,"text":"Wisconsin Department of Natural Resources","active":true,"usgs":false}],"preferred":false,"id":439627,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Krabbenhoft, David P. 0000-0003-1964-5020 dpkrabbe@usgs.gov","orcid":"https://orcid.org/0000-0003-1964-5020","contributorId":118001,"corporation":false,"usgs":true,"family":"Krabbenhoft","given":"David P.","email":"dpkrabbe@usgs.gov","affiliations":[{"id":677,"text":"Wisconsin Water Science Center","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":false,"id":439626,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wiener, James G.","contributorId":93853,"corporation":false,"usgs":false,"family":"Wiener","given":"James","email":"","middleInitial":"G.","affiliations":[{"id":17913,"text":"River Studies Center, University of Wisconsin-La Crosse","active":true,"usgs":false}],"preferred":false,"id":439625,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Babiarz, Christopher L.","contributorId":101822,"corporation":false,"usgs":false,"family":"Babiarz","given":"Christopher L.","affiliations":[],"preferred":false,"id":439628,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70033214,"text":"70033214 - 2007 - Sediment discharge into a subsiding Louisiana deltaic estuary through a Mississippi River diversion","interactions":[],"lastModifiedDate":"2012-03-12T17:21:23","indexId":"70033214","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1587,"text":"Estuarine, Coastal and Shelf Science","active":true,"publicationSubtype":{"id":10}},"title":"Sediment discharge into a subsiding Louisiana deltaic estuary through a Mississippi River diversion","docAbstract":"Wetlands of the Mississippi River deltaic plain in southeast Louisiana have been hydrologically isolated from the Mississippi River by containment levees for nearly a century. The ensuing lack of fluvial sediment inputs, combined with natural submergence processes, has contributed to high coastal land loss rates. Controlled river diversions have since been constructed to reconnect the marshes of the deltaic plain with the river. This study examines the impact of a pulsed diversion management plan on sediment discharge into the Breton Sound estuary, in which duplicate 185 m3 s-1-diversions lasting two weeks each were conducted in the spring of 2002 and 2003. Sediment delivery during each pulse was highly variable (11,300-43,800 metric tons), and was greatest during rising limbs of Mississippi River flood events. Overland flow, a necessary transport mechanism for river sediments to reach the subsiding backmarsh regions, was induced only when diversion discharge exceeded 100 m3 s-1. These results indicate that timing and magnitude of diversion events are both important factors governing marsh sediment deposition in the receiving basins of river diversions. Though the diversion serves as the primary source of river sediments to the estuary, the inputs observed here were several orders of magnitude less than historical sediment discharge through crevasses and uncontrolled diversions in the region, and are insufficient to offset present rates of relative sea level rise. ?? 2006 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Estuarine, Coastal and Shelf Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.ecss.2006.06.035","issn":"02727714","usgsCitation":"Snedden, G., Cable, J., Swarzenski, C., and Swenson, E., 2007, Sediment discharge into a subsiding Louisiana deltaic estuary through a Mississippi River diversion: Estuarine, Coastal and Shelf Science, v. 71, no. 1-2, p. 181-193, https://doi.org/10.1016/j.ecss.2006.06.035.","startPage":"181","endPage":"193","numberOfPages":"13","costCenters":[],"links":[{"id":213562,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecss.2006.06.035"},{"id":241196,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8983e4b08c986b316dfd","contributors":{"authors":[{"text":"Snedden, G.A. 0000-0001-7821-3709","orcid":"https://orcid.org/0000-0001-7821-3709","contributorId":37535,"corporation":false,"usgs":true,"family":"Snedden","given":"G.A.","affiliations":[],"preferred":false,"id":439863,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cable, J.E.","contributorId":25963,"corporation":false,"usgs":true,"family":"Cable","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":439862,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Swarzenski, C.","contributorId":96096,"corporation":false,"usgs":true,"family":"Swarzenski","given":"C.","email":"","affiliations":[],"preferred":false,"id":439864,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Swenson, E.","contributorId":99784,"corporation":false,"usgs":true,"family":"Swenson","given":"E.","affiliations":[],"preferred":false,"id":439865,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70033219,"text":"70033219 - 2007 - Impacts of waste from concentrated animal feeding operations on water quality","interactions":[],"lastModifiedDate":"2018-10-26T07:57:46","indexId":"70033219","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1542,"text":"Environmental Health Perspectives","active":true,"publicationSubtype":{"id":10}},"title":"Impacts of waste from concentrated animal feeding operations on water quality","docAbstract":"Waste from agricultural livestock operations has been a long-standing concern with respect to contamination of water resources, particularly in terms of nutrient pollution. However, the recent growth of concentrated animal feeding operations (CAFOs) presents a greater risk to water quality because of both the increased volume of waste and to contaminants that may be present (e.g., antibiotics and other veterinary drugs) that may have both environmental and public health importance. Based on available data, generally accepted livestock waste management practices do not adequately or effectively protect water resources from contamination with excessive nutrients, microbial pathogens, and pharmaceuticals present in the waste. Impacts on surface water sources and wildlife have been documented in many agricultural areas in the United States. Potential impacts on human and environmental health from long-term inadvertent exposure to water contaminated with pharmaceuticals and other compounds are a growing public concern. This workgroup, which is part of the Conference on Environmental Health Impacts of Concentrated Animal Feeding Operations: Anticipating Hazards-Searching for Solutions, identified needs for rigorous ecosystem monitoring in the vicinity of CAFOs and for improved characterization of major toxicants affecting the environment and human health. Last, there is a need to promote and enforce best practices to minimize inputs of nutrients and toxicants from CAFOs into freshwater and marine ecosystems.
","language":"English","publisher":"National Institute of Environmental Health Sciences","doi":"10.1289/ehp.8839","issn":"00916765","usgsCitation":"Burkholder, J., Libra, B., Weyer, P., Heathcote, S., Kolpin, D., Thorne, P., and Wichman, M., 2007, Impacts of waste from concentrated animal feeding operations on water quality: Environmental Health Perspectives, v. 115, no. 2, p. 308-312, https://doi.org/10.1289/ehp.8839.","productDescription":"5 p.","startPage":"308","endPage":"312","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":351,"text":"Iowa Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":487774,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1289/ehp.8839","text":"Publisher Index Page"},{"id":240724,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"115","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3901e4b0c8380cd61781","contributors":{"authors":[{"text":"Burkholder, J.","contributorId":7091,"corporation":false,"usgs":true,"family":"Burkholder","given":"J.","email":"","affiliations":[],"preferred":false,"id":439880,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Libra, B.","contributorId":73016,"corporation":false,"usgs":true,"family":"Libra","given":"B.","email":"","affiliations":[],"preferred":false,"id":439885,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Weyer, P.","contributorId":76947,"corporation":false,"usgs":true,"family":"Weyer","given":"P.","email":"","affiliations":[],"preferred":false,"id":439886,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Heathcote, S.","contributorId":20163,"corporation":false,"usgs":true,"family":"Heathcote","given":"S.","email":"","affiliations":[],"preferred":false,"id":439882,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kolpin, D.","contributorId":18128,"corporation":false,"usgs":true,"family":"Kolpin","given":"D.","email":"","affiliations":[],"preferred":false,"id":439881,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Thorne, P.S.","contributorId":31986,"corporation":false,"usgs":true,"family":"Thorne","given":"P.S.","email":"","affiliations":[],"preferred":false,"id":439883,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Wichman, M.","contributorId":49983,"corporation":false,"usgs":true,"family":"Wichman","given":"M.","affiliations":[],"preferred":false,"id":439884,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":70033223,"text":"70033223 - 2007 - The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70033223","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3301,"text":"River Research and Applications","active":true,"publicationSubtype":{"id":10}},"title":"The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California","docAbstract":"This paper reports basinwide patterns of hydrograph alteration via statistical and graphical analysis from a network of long-term streamflow gauges located various distances downstream of major dams and confluences in the Sacramento River basin in California, USA. Streamflow data from 10 gauging stations downstream of major dams were divided into hydrologic series corresponding to the periods before and after dam construction. Pre- and post-dam flows were compared with respect to hydrograph characteristics representing frequency, magnitude and shape: annual flood peak, annual flow trough, annual flood volume, time to flood peak, flood drawdown time and interarrival time. The use of such a suite of characteristics within a statistical and graphical framework allows for generalising distinct strategies of flood control operation that can be identified without any a priori knowledge of operations rules. Dam operation is highly dependent on the ratio of reservoir capacity to annual flood volume (impounded runoff index). Dams with high values of this index generally completely cut off flood peaks thus reducing time to peak, drawdown time and annual flood volume. Those with low values conduct early and late flow releases to extend the hydrograph, increasing time to peak, drawdown time and annual flood volume. The analyses reveal minimal flood control benefits from foothill dams in the lower Sacramento River (i.e. dissipation of the down-valley flood control signal). The lower part of the basin is instead reliant on a weir and bypass system to control lowland flooding. Data from a control gauge (i.e. with no upstream dams) suggest a background signature of global climate change expressed as shortened flood hydrograph falling limbs and lengthened flood interarrival times at low exceedence probabilities. This research has implications for flood control, water resource management, aquatic and riparian ecosystems and for rehabilitation strategies involving flow alteration and/or manipulation of sediment supplies. Copyright ?? 2006 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"River Research and Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/rra.968","issn":"15351459","usgsCitation":"Singer, M., 2007, The influence of major dams on hydrology through the drainage network of the Sacramento River basin, California: River Research and Applications, v. 23, no. 1, p. 55-72, https://doi.org/10.1002/rra.968.","startPage":"55","endPage":"72","numberOfPages":"18","costCenters":[],"links":[{"id":213187,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/rra.968"},{"id":240790,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-10-26","publicationStatus":"PW","scienceBaseUri":"505bad2de4b08c986b323a2a","contributors":{"authors":[{"text":"Singer, M.B.","contributorId":67274,"corporation":false,"usgs":true,"family":"Singer","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":439906,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70033316,"text":"70033316 - 2007 - Effects of capillarity and microtopography on wetland specific yield","interactions":[],"lastModifiedDate":"2020-09-10T17:52:41.800191","indexId":"70033316","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3750,"text":"Wetlands","onlineIssn":"1943-6246","printIssn":"0277-5212","active":true,"publicationSubtype":{"id":10}},"title":"Effects of capillarity and microtopography on wetland specific yield","docAbstract":"Hydrologic models aid in describing water flows and levels in wetlands. Frequently, these models use a specific yield conceptualization to relate water flows to water level changes. Traditionally, a simple conceptualization of specific yield is used, composed of two constant values for above- and below-surface water levels and neglecting the effects of soil capillarity and land surface microtopography. The effects of capillarity and microtopography on specific yield were evaluated at three wetland sites in the Florida Everglades. The effect of capillarity on specific yield was incorporated based on the fillable pore space within a soil moisture profile at hydrostatic equilibrium with the water table. The effect of microtopography was based on areal averaging of topographically varying values of specific yield. The results indicate that a more physically-based conceptualization of specific yield incorporating capillary and microtopographic considerations can be substantially different from the traditional two-part conceptualization, and from simpler conceptualizations incorporating only capillarity or only microtopography. For the sites considered, traditional estimates of specific yield could underor over-estimate the more physically based estimates by a factor of two or more. The results suggest that consideration of both capillarity and microtopography is important to the formulation of specific yield in physically based hydrologic models of wetlands.
","language":"English","publisher":"Springer","doi":"10.1672/0277-5212(2007)27[693:EOCAMO]2.0.CO;2","usgsCitation":"Sumner, D.M., 2007, Effects of capillarity and microtopography on wetland specific yield: Wetlands, v. 27, no. 3, p. 693-701, https://doi.org/10.1672/0277-5212(2007)27[693:EOCAMO]2.0.CO;2.","productDescription":"9 p.","startPage":"693","endPage":"701","numberOfPages":"9","costCenters":[],"links":[{"id":241169,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a06a2e4b0c8380cd51345","contributors":{"authors":[{"text":"Sumner, D. M.","contributorId":100827,"corporation":false,"usgs":true,"family":"Sumner","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":440306,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70033546,"text":"70033546 - 2007 - The effects of flooding and sedimentation on seed germination of two bottomland hardwood tree species","interactions":[],"lastModifiedDate":"2017-05-17T09:33:08","indexId":"70033546","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3750,"text":"Wetlands","onlineIssn":"1943-6246","printIssn":"0277-5212","active":true,"publicationSubtype":{"id":10}},"title":"The effects of flooding and sedimentation on seed germination of two bottomland hardwood tree species","docAbstract":"Flooding and sedimentation are two of the dominant disturbances that influence tree species composition and succession in floodplain forests. The importance of these disturbances may be most notable during the germination and establishment phases of plant succession. Channelization of most alluvial systems in the southeastern United States has caused dramatic and systematic alterations to both hydrologic and sedimentation processes of floodplain systems. We determined the influence of these altered abiotic processes on the germination and growth of two common floodplain tree species: swamp chestnut oak (Quercus michauxii Nutt.) and overcup oak (Q. lyrata Walt.). Flood durations of 0 days, 15 days, and 30 days prior to germination was a factor in germination, but the effect varied by species. For instance, ovcrcup oak, which has a higher tolerance to flooding than swamp chestnut oak, had higher germination rates in the flooded treatments (15-day x?? = 78% and 30-day x?? = 85%) compared to the non-flooded treatment (x?? = 54%). In contrast, germination rates of swamp chestnut oak were negatively affected by the 30-day flood treatment. Sediment deposition rates of 2 cm of top soil, 2 cm of sand, and 8 cm of sand also affected germination, but were secondary to flood duration. The main effect of the sediment treatment in this experiment was a reduction in above-ground height of seedlings. Our study provides evidence for the importance of both flooding and sedimentation in determining tree species composition in floodplain systems, and that tolerance levels to such stressors vary by species. ?? 2007, The Society of Wetland Scientists.","language":"English","publisher":"Springer","doi":"10.1672/0277-5212(2007)27[588:TEOFAS]2.0.CO;2","issn":"02775","usgsCitation":"Pierce, A.R., and King, S., 2007, The effects of flooding and sedimentation on seed germination of two bottomland hardwood tree species: Wetlands, v. 27, no. 3, p. 588-594, https://doi.org/10.1672/0277-5212(2007)27[588:TEOFAS]2.0.CO;2.","productDescription":"7 p.","startPage":"588","endPage":"594","costCenters":[],"links":[{"id":242117,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bab7be4b08c986b322e8f","contributors":{"authors":[{"text":"Pierce, Aaron R.","contributorId":94421,"corporation":false,"usgs":false,"family":"Pierce","given":"Aaron","email":"","middleInitial":"R.","affiliations":[{"id":33463,"text":"Nicholls State University, Thibodaux, LA","active":true,"usgs":false}],"preferred":false,"id":441387,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"King, S.L.","contributorId":105663,"corporation":false,"usgs":true,"family":"King","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":441388,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70033606,"text":"70033606 - 2007 - Effects of habitat management treatments on plant community composition and biomass in a Montane wetland","interactions":[],"lastModifiedDate":"2020-09-10T18:58:21.304105","indexId":"70033606","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3750,"text":"Wetlands","onlineIssn":"1943-6246","printIssn":"0277-5212","active":true,"publicationSubtype":{"id":10}},"title":"Effects of habitat management treatments on plant community composition and biomass in a Montane wetland","docAbstract":"Grazing and burning are commonly applied practices that can impact the diversity and biomass of wetland plant communities. We evaluated the vegetative response of wetlands and adjacent upland grasslands to four treatment regimes (continuous idle, fall prescribed burning followed by idle, annual fall cattle grazing, and rotation of summer grazing and idle) commonly used by the U.S. Fish and Wildlife Service. Our study area was Grays Lake, a large, montane wetland in southeastern Idaho that is bordered by extensive wet meadows. We identified seven plant cover types, representing the transition from dry meadow to deep wetland habitats: mixed deep marsh, spikerush slough, Baltic rush (Juncus balticus), moist meadow, alkali, mesic meadow, and dry meadow. We compared changes in community composition and total aboveground biomass of each plant cover type between 1998, when all units had been idled for three years, and 1999 (1 yr post-treatment) and 2000 (2 yr post-treatment). Analysis using non-metric multidimensional scaling indicated that compositional changes varied among cover types, treatments, and years following treatment. Treatment-related changes in community composition were greatest in mixed deep marsh, Baltic rush, and mesic meadow. In mixed deep marsh and Baltic rush, grazing and associated trampling contributed to changes in the plant community toward more open water and aquatic species and lower dominance of Baltic rush; grazing and trampling also seemed to contribute to increased cover in mesic meadow. Changing hydrological conditions, from multiple years of high water to increasing drought, was an important factor influencing community composition and may have interacted with management treatments. Biomass differed among treatments and between years within cover types. In the wettest cover types, fall burning and grazing rotation treatments had greater negative impact on biomass than the idle treatment, but in drier cover types, summer grazing stimulated biomass production. Our results illustrate the spatial and temporal complexity of the transition between dry meadow and wetland habitats, and variable interactions among plant communities, treatments, and annual wetland conditions.
","language":"English","publisher":"Springer","doi":"10.1672/0277-5212(2007)27[570:EOHMTO]2.0.CO;2","usgsCitation":"Austin, J.E., Keough, J.R., and Pyle, W., 2007, Effects of habitat management treatments on plant community composition and biomass in a Montane wetland: Wetlands, v. 27, no. 3, p. 570-587, https://doi.org/10.1672/0277-5212(2007)27[570:EOHMTO]2.0.CO;2.","productDescription":"18 p.","startPage":"570","endPage":"587","costCenters":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":241987,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Idaho","otherGeospatial":"Gray's Lake","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -111.4320945739746,\n 42.995482339084376\n ],\n [\n -111.37870788574219,\n 42.995482339084376\n ],\n [\n -111.37870788574219,\n 43.04593448499866\n ],\n [\n -111.4320945739746,\n 43.04593448499866\n ],\n [\n -111.4320945739746,\n 42.995482339084376\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"27","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a070ae4b0c8380cd51522","contributors":{"authors":[{"text":"Austin, Jane E. 0000-0001-8775-2210 jaustin@usgs.gov","orcid":"https://orcid.org/0000-0001-8775-2210","contributorId":146411,"corporation":false,"usgs":true,"family":"Austin","given":"Jane","email":"jaustin@usgs.gov","middleInitial":"E.","affiliations":[{"id":480,"text":"Northern Prairie Wildlife Research Center","active":true,"usgs":true}],"preferred":true,"id":441643,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Keough, Janet R.","contributorId":49300,"corporation":false,"usgs":true,"family":"Keough","given":"Janet","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":441645,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pyle, W.H.","contributorId":52518,"corporation":false,"usgs":true,"family":"Pyle","given":"W.H.","email":"","affiliations":[],"preferred":false,"id":441644,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70033634,"text":"70033634 - 2007 - The importance of subsurface geology for water source and vegetation communities in Cherokee Marsh, Wisconsin","interactions":[],"lastModifiedDate":"2020-09-10T19:08:23.416541","indexId":"70033634","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3750,"text":"Wetlands","onlineIssn":"1943-6246","printIssn":"0277-5212","active":true,"publicationSubtype":{"id":10}},"title":"The importance of subsurface geology for water source and vegetation communities in Cherokee Marsh, Wisconsin","docAbstract":"Restoration of disturbed wetland systems is an important component of wetland mitigation, yet uncertainty remains about how hydrologic processes affect biologic processes and wetlands patterns. To design more effective restoration strategies and re-establish native plant communities in disturbed wetlands, it is imperative to understand undisturbed systems. A site within Cherokee Marsh located in Madison, Wisconsin, USA, contains a relatively undisturbed area of wetland consisting of plant communities common within the prairie landscape including a fen, sedge meadow, and shallow marsh. These distinct communities are found within an area of minimal topographic relief, yet transitions from one community to the next occur over short distances. This study sought to characterize the geologic, hydrologic, and chemical gradients associated with these shifts in vegetation to gain insight into the factors controlling the spatial differences in dominant plant species, which could be critical for restoration success. Vegetation analyses revealed a transition of dominant sedge species, which appeared to correspond to changes in hydrology from a ground-water dominated to a surface-water dominated system (as determined by water isotopes). Along the same vegetation transect, subsurface coring results show a heterogeneous composition of peat and till with lateral and vertical variations in stratigraphy, which relates to variability in ground-water discharge as evidenced by hydroperiods and stable isotope composition. Applications of this type of approach throughout the glaciated terrains of the midwestern and northeastern United States and Canada can improve future wetland restoration and management.
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To examine diel zinc cycles in streams affected by acid rock drainage, we have developed a novel instrument, the Zn-DigiScan, to continuously monitor in situ zinc concentrations in near real-time. Initial results from a 3-day deployment at Fisher Creek, Montana have demonstrated the ability of the Zn-DigiScan to record diel Zn cycling at levels below 100 μg/l. Longer deployments of this instrument could be used to examine the effects of episodic events such as rainstorms and snowmelt pulses on zinc loading in streams affected by acid rock drainage.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Monitoring and Assessment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Springer","doi":"10.1007/s10661-006-9569-y","issn":"01676369","usgsCitation":"Chapin, T.P., Nimick, D.A., Gammons, C.H., and Wanty, R.B., 2007, Diel cycling of zinc in a stream impacted by acid rock drainage: Initial results from a new in situ Zn analyzer: Environmental Monitoring and Assessment, v. 133, no. 1-3, p. 161-167, https://doi.org/10.1007/s10661-006-9569-y.","productDescription":"7 p.","startPage":"161","endPage":"167","numberOfPages":"7","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":238586,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211317,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10661-006-9569-y"}],"country":"United States","state":"Montana","otherGeospatial":"Fisher Creek","volume":"133","issue":"1-3","noUsgsAuthors":false,"publicationDate":"2006-12-16","publicationStatus":"PW","scienceBaseUri":"505a00c0e4b0c8380cd4f8cf","contributors":{"authors":[{"text":"Chapin, Thomas P.","contributorId":96184,"corporation":false,"usgs":true,"family":"Chapin","given":"Thomas","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":430689,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nimick, David A. dnimick@usgs.gov","contributorId":421,"corporation":false,"usgs":true,"family":"Nimick","given":"David","email":"dnimick@usgs.gov","middleInitial":"A.","affiliations":[{"id":5050,"text":"WY-MT Water Science Center","active":true,"usgs":true},{"id":573,"text":"Special Applications Science Center","active":true,"usgs":true}],"preferred":true,"id":430691,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gammons, Chris","contributorId":140801,"corporation":false,"usgs":false,"family":"Gammons","given":"Chris","affiliations":[{"id":13574,"text":"Montana Tech of the University of Montana, Butte, MT","active":true,"usgs":false}],"preferred":false,"id":430688,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wanty, Richard B. 0000-0002-2063-6423 rwanty@usgs.gov","orcid":"https://orcid.org/0000-0002-2063-6423","contributorId":443,"corporation":false,"usgs":true,"family":"Wanty","given":"Richard","email":"rwanty@usgs.gov","middleInitial":"B.","affiliations":[{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true}],"preferred":true,"id":430690,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70031037,"text":"70031037 - 2007 - Nitrate in aquifers beneath agricultural systems","interactions":[],"lastModifiedDate":"2012-03-12T17:21:16","indexId":"70031037","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Nitrate in aquifers beneath agricultural systems","docAbstract":"Research from several regions of the world provides spatially anecdotal evidence to hypothesize which hydrologic and agricultural factors contribute to groundwater vulnerability to nitrate contamination. Analysis of nationally consistent measurements from the U.S. Geological Survey's NAWQA program confirms these hypotheses for a substantial range of agricultural systems. Shallow unconfined aquifers are most susceptible to nitrate contamination associated with agricultural systems. Alluvial and other unconsolidated aquifers are the most vulnerable and also shallow carbonate aquifers that provide a substantial but smaller contamination risk. Where any of these aquifers are overlain by permeable soils the risk of contamination is larger. Irrigated systems can compound this vulnerability by increasing leaching facilitated by additional recharge and additional nutrient applications. The system of corn, soybean, and hogs produced significantly larger concentrations of groundwater nitrate than all other agricultural systems because this system imports the largest amount of N-fertilizer per unit production area. Mean nitrate under dairy, poultry, horticulture, and cattle and grains systems were similar. If trends in the relation between increased fertilizer use and groundwater nitrate in the United States are repeated in other regions of the world, Asia may experience increasing problems because of recent increases in fertilizer use. Groundwater monitoring in Western and Eastern Europe as well as Russia over the next decade may provide data to determine if the trend in increased nitrate contamination can be reversed. If the concentrated livestock trend in the United States is global, it may be accompanied by increasing nitrogen contamination in groundwater. Concentrated livestock provide both point sources in the confinement area and intense non-point sources as fields close to facilities are used for manure disposal. Regions where irrigated cropland is expanding, such as in Asia, may experience the greatest impact of this practice on groundwater nitrate. ?? USDA 2007.","largerWorkTitle":"Water Science and Technology","language":"English","doi":"10.2166/wst.2007.436","issn":"02731223","isbn":"1843395975; 9781843395973","usgsCitation":"Burkart, M.R., and Stoner, J., 2007, Nitrate in aquifers beneath agricultural systems, in Water Science and Technology, v. 56, no. 1, p. 59-69, https://doi.org/10.2166/wst.2007.436.","startPage":"59","endPage":"69","numberOfPages":"11","costCenters":[],"links":[{"id":211452,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2166/wst.2007.436"},{"id":238743,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"56","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a66a3e4b0c8380cd72ec2","contributors":{"editors":[{"text":"Tanik A.Ozturk I.Yazgan M.S.Heath R.","contributorId":128447,"corporation":true,"usgs":false,"organization":"Tanik A.Ozturk I.Yazgan M.S.Heath R.","id":536656,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Burkart, M. R.","contributorId":42190,"corporation":false,"usgs":true,"family":"Burkart","given":"M.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":429716,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stoner, J.D.","contributorId":58261,"corporation":false,"usgs":true,"family":"Stoner","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":429717,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":1016445,"text":"1016445 - 2007 - Nutrient vectors and riparian processing: A review with special reference to African semiarid savanna ecosystems","interactions":[],"lastModifiedDate":"2021-05-25T12:00:56.605058","indexId":"1016445","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1478,"text":"Ecosystems","active":true,"publicationSubtype":{"id":10}},"title":"Nutrient vectors and riparian processing: A review with special reference to African semiarid savanna ecosystems","docAbstract":"This review article describes vectors for nitrogen and phosphorus delivery to riparian zones in semiarid African savannas, the processing of nutrients in the riparian zone and the effect of disturbance on these processes. Semiarid savannas exhibit sharp seasonality, complex hillslope hydrology and high spatial heterogeneity, all of which ultimately impact nutrient fluxes between riparian, upland and aquatic environments. Our review shows that strong environmental drivers such as fire and herbivory enhance nitrogen, phosphorus and sediment transport to lower slope positions by shaping vegetative patterns. These vectors differ significantly from other arid and semiarid ecosystems, and from mesic ecosystems where the impact of fire and herbivory are less pronounced and less predictable. Also unique is the presence of sodic soils in certain hillslopes, which substantially alters hydrological flowpaths and may act as a trap where nitrogen is immobilized while sediment and phosphorus transport is enhanced. Nutrients and sediments are also deposited in the riparian zone during seasonal, intermittent floods while, during the dry season, subsurface movement of water from the stream into riparian soils and vegetation further enrich riparian zones with nutrients. As is found in mesic ecosystems, nutrients are immobilized in semiarid riparian corridors through microbial and plant uptake, whereas dissimilatory processes such as denitrification may be important where labile nitrogen and carbon are in adequate supply and physical conditions are suitable-such as in seeps, wallows created by animals, ephemeral wetlands and stream edges. Interaction between temporal hydrologic connectivity and spatial heterogeneity are disrupted by disturbances such as large floods and extended droughts, which may convert certain riparian patches from sinks to sources for nitrogen and phosphorus. In the face of increasing anthropogenic pressure, the scientific challenges are to provide a basic understanding of riparian biogeochemistry in semiarid African savannas to adequately address the temporal and spatial impact of disturbances, and to apply this knowledge to better regional land and water management. An integrated, multidisciplinary approach applied in protected as well as human-disturbed ecosystems in southern Africa is essential for underpinning a strong environmental basis for sustainable human-related expansion.
","language":"English","publisher":"Springer","doi":"10.1007/s10021-007-9092-1","usgsCitation":"Jacobs, S.M., Bechtold, J., Biggs, H.C., Grimm, N.B., Lorentz, S., McClain, M., Naiman, R., Perakis, S., Pinay, G., and Scholes, M., 2007, Nutrient vectors and riparian processing: A review with special reference to African semiarid savanna ecosystems: Ecosystems, v. 10, no. 8, p. 1231-1249, https://doi.org/10.1007/s10021-007-9092-1.","productDescription":"19 p.","startPage":"1231","endPage":"1249","costCenters":[{"id":290,"text":"Forest and Rangeland Ecosystem Science Center","active":false,"usgs":true}],"links":[{"id":134245,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Africa","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -15.820312499999988,\n 26.43122806450644\n ],\n [\n -19.335937499999986,\n 17.644022027872712\n ],\n [\n -15.468749999999986,\n 5.9657536710655235\n ],\n [\n -2.1093749999999862,\n 1.0546279422758869\n ],\n [\n 7.3828125,\n 2.4601811810210052\n ],\n [\n 11.6015625,\n -10.833305983642491\n ],\n [\n 10.8984375,\n -19.31114335506464\n ],\n [\n 13.7109375,\n -27.371767300523032\n ],\n [\n 16.875,\n -34.30714385628803\n ],\n [\n 22.8515625,\n -36.87962060502676\n ],\n [\n 52.03125,\n -27.68352808378776\n ],\n [\n 51.328125,\n 2.8113711933311403\n ],\n [\n 51.67968749999999,\n 12.211180191503997\n ],\n [\n 43.06640625,\n 12.554563528593656\n ],\n [\n 42.01171875,\n 15.623036831528264\n ],\n [\n 36.035156250000014,\n 25.799891182088334\n ],\n [\n 33.046875000000014,\n 31.503629305773003\n ],\n [\n 21.445312500000014,\n 33.43144133557529\n ],\n [\n 19.33593750000001,\n 30.751277776257812\n ],\n [\n 10.371093750000012,\n 37.857507156252\n ],\n [\n -8.78906249999999,\n 35.17380831799956\n ],\n [\n -15.820312499999988,\n 26.43122806450644\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"10","issue":"8","noUsgsAuthors":false,"publicationDate":"2007-10-10","publicationStatus":"PW","scienceBaseUri":"4f4e4afce4b07f02db69672b","contributors":{"authors":[{"text":"Jacobs, Shayne M.","contributorId":78701,"corporation":false,"usgs":true,"family":"Jacobs","given":"Shayne","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":324261,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bechtold, J.S.","contributorId":52141,"corporation":false,"usgs":true,"family":"Bechtold","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":324259,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Biggs, Harry C.","contributorId":37299,"corporation":false,"usgs":true,"family":"Biggs","given":"Harry","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":324257,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Grimm, N. 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Physical, Chemical, and Biological Responses of Streams to Increasing Watershed Urbanization in the Piedmont Ecoregion of Georgia and Alabama, 2003","interactions":[],"lastModifiedDate":"2017-01-12T10:15:31","indexId":"sir20065101B","displayToPublicDate":"2006-07-28T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-5101","chapter":"B","title":"Chapter B. 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Response variables measured include stream hydrology and water temperature, instream habitat, field properties (pH, conductivity, dissolved oxygen, turbidity), nutrients, pesticides, suspended sediment, sulfate, chloride, Escherichia coli (E. coli) concentrations, and characterization of algal, invertebrate and fish communities. In addition, semipermeablemembrane devices (SPMDs)?passive samplers that concentrate hydrophobic organic contaminants such as polycyclicaromatic hydrocarbons (PAHs)?were used to evaluate water-quality conditions during the 4 weeks prior to biological sampling. Changes in physical, chemical, and biological conditions were evaluated using both nonparametric correlation analysis and nonmetric multidimensional scaling (MDS) ordinations and associated comparisons of dataset similarity matrices.\r\n\r\nMany of the commonly reported effects of watershed urbanization on streams were observed in this study, such as altered hydrology and increases in some chemical constituent levels. Analysis of water-chemistry data showed that specific conductance, chloride, sulfate, and pesticides increased as urbanization increased. Nutrient concentrations were not directly correlated to increases in development, but were inversely correlated to percent forest in the watershed. Analyses of SPMD-derived data showed that bioassays and certain chemical constituents such as pyrene and benzophenanthrene, both PAHs found in coal tar, were strongly correlated with measures of watershed urbanization. Hydrologic variability metrics indicated that as urban development increased, streams became flashier, with characteristic high flows having shorter duration. The hydrologic effects associated with urbanization were greatest during the fall and least apparent during the winter. No correlations were observed between increasing urbanization and stream temperature or changes in stream habitat.\r\n\r\nAlgal, invertebrate, and fish communities exhibited statistically significant changes as watersheds became increasingly urban, with the strongest responses observed in the invertebrate community followed by fishes, then algal diatom communities. Invertebrate communities were the most responsive to increasing urbanization with Ephemeroptera, Plecoptera, and Tricoptera taxa, especially Plecoptera (stoneflies) responding negatively and most strongly to increasing urbanization. Invertebrate communities were influenced more significantly by water quality, although significant responses to altered hydrology also were noted. In terms of the fish community, the percentage of cyprinids present in the stream was the only Index of Biotic Integrity metric that responded negatively to increases in watershed urbanization. Fish community response to urbanization was intermediate relative to algae and invertebrates with respect to significant metric responses as well as the overall community response to increasing urbanization. Measures of hydrologic variability were the most influential environmental variables affecting the algal community.\r\n\r\nAlthough sites were originally chosen to represent a gradient of increasing urbanization, a cluster analysis performed on the component metrics of the urban index categorized sites into four distinct groups. 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","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Treatise on geochemistry","language":"English","publisher":"Elsevier","doi":"10.1016/B0-08-043751-6/05074-X","isbn":"9780080437514","usgsCitation":"Nordstrom, D.K., 2007, Modeling low-temperature geochemical processes, chap. 2 of Treatise on geochemistry, v. 5, p. 1-38, https://doi.org/10.1016/B0-08-043751-6/05074-X.","productDescription":"38 p.","startPage":"1","endPage":"38","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"links":[{"id":356700,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5c10dc40e4b034bf6a7fd847","contributors":{"editors":[{"text":"Drever, J.I.","contributorId":58407,"corporation":false,"usgs":true,"family":"Drever","given":"J.I.","affiliations":[],"preferred":false,"id":743259,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Nordstrom, D. 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U.S. Geological Survey scientists have completed a major assessment of the environmental effects of historical mining in the Animas River watershed focusing on the area upstream of Silverton, Colo.?the Mineral Creek, Cement Creek, and upper Animas River basins. The study demonstrated how the watershed approach can be used to assess and rank mining-affected sites for possible cleanup. The study was conducted in collaboration with State and Federal land-management agencies and regional stakeholders groups.\r\n\r\nThis book is available for purchase at Information Services, U.S. Geological Survey (1-888-ASK-USGS).","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/pp1651","collaboration":"Prepared in cooperation with the USDA Forest Service, U.S. Bureau of Land Management, and U.S. Environmental Protection Agency","usgsCitation":"2007, Integrated investigations of environmental effects of historical mining in the Animas River Watershed, San Juan County, Colorado (Version 1.0): U.S. Geological Survey Professional Paper 1651, 1096 p., https://doi.org/10.3133/pp1651.","productDescription":"1096 p.","additionalOnlineFiles":"Y","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology 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Juan\",\"state\":\"CO\"}}]}","edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49dce4b07f02db5e17aa","contributors":{"editors":[{"text":"Church, Stan E. schurch@usgs.gov","contributorId":803,"corporation":false,"usgs":true,"family":"Church","given":"Stan","email":"schurch@usgs.gov","middleInitial":"E.","affiliations":[],"preferred":false,"id":657138,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"Von Guerard, Paul","contributorId":40620,"corporation":false,"usgs":true,"family":"Von Guerard","given":"Paul","affiliations":[],"preferred":false,"id":657139,"contributorType":{"id":2,"text":"Editors"},"rank":2},{"text":"Finger, Susan E. sfinger@usgs.gov","contributorId":1317,"corporation":false,"usgs":true,"family":"Finger","given":"Susan","email":"sfinger@usgs.gov","middleInitial":"E.","affiliations":[],"preferred":true,"id":657140,"contributorType":{"id":2,"text":"Editors"},"rank":3}]}} ,{"id":70160265,"text":"70160265 - 2006 - Hydrologic landscape units and adaptive management of intermountain wetlands","interactions":[],"lastModifiedDate":"2017-05-18T12:40:09","indexId":"70160265","displayToPublicDate":"2015-09-07T08:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Hydrologic landscape units and adaptive management of intermountain wetlands","docAbstract":"daptive management is often proposed to assist in the management of national wildlife refuges and allows the exploration of alternatives as well as the addition of ne w knowledge as it becomes available. The hydrological landscape unit can be a good foundation for such efforts. Red Rock Lakes National Wildlife Refuge (NWR) is in an intermountain basin dominated by vertical tectonics in the Northern Rocky Mountains. A geographic information system was used to define the boundaries for the hydrologic landscape units there. Units identified include alluvial fan, interfan, stream alluvi um and basin flat. Management alternatives can be informed by ex amination of processes that occu r on the units. For example, an ancient alluvial fan unit related to Red Rock Creek appear s to be isolated from stream flow today, with recharge dominated by precipitation and bedrock springs; while other alluvial fan units in the area have shallow ground water recharged from mountain streams and precipitation. The scale of hydrologic processes in interfan units differs from that in alluvial fan hydrologic landscape units. These differences are important when the refuge is evaluating habitat management activities. Hydrologic landscape units provide scientific unde rpinnings for the refuge’s comprehensive planning process. New geologic, hydrologic, and biologic knowledge can be integrated into the hydrologic landscape unit definition and improve adaptive management.
","largerWorkTitle":"Adaptive Management of Water Resources: American Water Resources Association Summer Specialty Conference.","language":"English","publisher":"AWRA","usgsCitation":"Custer, S.G., and Sojda, R., 2006, Hydrologic landscape units and adaptive management of intermountain wetlands, in Adaptive Management of Water Resources: American Water Resources Association Summer Specialty Conference., 6 p.","productDescription":"6 p.","numberOfPages":"6","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":312303,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":312302,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.awra.org/proceedings/0606pro_toc.html"}],"country":"United States","state":"Montana","otherGeospatial":"Centenial Valley, Red Rock Lakes NWR","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -112.67578124999999,\n 44.457309801319305\n ],\n [\n -112.67578124999999,\n 45.47554027158593\n ],\n [\n -110.98388671874999,\n 45.47554027158593\n ],\n [\n -110.98388671874999,\n 44.457309801319305\n ],\n [\n -112.67578124999999,\n 44.457309801319305\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"567147d7e4b09cfe53ca7d79","contributors":{"authors":[{"text":"Custer, Stephen G.","contributorId":104944,"corporation":false,"usgs":true,"family":"Custer","given":"Stephen","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":582343,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sojda, R.S.","contributorId":99075,"corporation":false,"usgs":true,"family":"Sojda","given":"R.S.","email":"","affiliations":[],"preferred":false,"id":582344,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70160399,"text":"70160399 - 2006 - Coping with climate change","interactions":[],"lastModifiedDate":"2016-02-22T13:23:37","indexId":"70160399","displayToPublicDate":"2015-08-03T08:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":651,"text":"ActionBioscience","active":true,"publicationSubtype":{"id":10}},"title":"Coping with climate change","docAbstract":"What have we learned so far about how climate change is affecting our global environment? Studies show that it adversely affects human and natural systems by
\n• reducing biodiversity
\n• altering hydrological systems
\n• impairing biological and chemical cycles
\n• making it more difficult to restore degraded ecosystems
\nClimate is not the only factor in the deterioration of natural systems.We are making big changes to the landscape, altering land use and land cover in major ways. These changes combined present a challenge to environmental management. Adaptive management is a scientific approach to managing the adverse impacts of climate and landscape change.
","language":"English","publisher":"American Institute of Biological Sciences","usgsCitation":"Prato, T., and Fagre, D.B., 2006, Coping with climate change: ActionBioscience.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":314003,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":312513,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.actionbioscience.org/environment/prato_fagre.html"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"568f9a48e4b0e7a44bc63d63","contributors":{"authors":[{"text":"Prato, Tony","contributorId":97394,"corporation":false,"usgs":true,"family":"Prato","given":"Tony","affiliations":[],"preferred":false,"id":582837,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fagre, Daniel B. 0000-0001-8552-9461 dan_fagre@usgs.gov","orcid":"https://orcid.org/0000-0001-8552-9461","contributorId":2036,"corporation":false,"usgs":true,"family":"Fagre","given":"Daniel","email":"dan_fagre@usgs.gov","middleInitial":"B.","affiliations":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"preferred":true,"id":582838,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":79238,"text":"ds151 - 2006 - Geochemical data for mercury, methylmercury, and other constituents in sediments from Englebright Lake, California, 2002","interactions":[],"lastModifiedDate":"2020-03-21T11:55:07","indexId":"ds151","displayToPublicDate":"2012-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":310,"text":"Data Series","code":"DS","onlineIssn":"2327-638X","printIssn":"2327-0271","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"151","title":"Geochemical data for mercury, methylmercury, and other constituents in sediments from Englebright Lake, California, 2002","docAbstract":"This report presents geochemical data from two 2002 sampling campaigns conducted in Englebright Lake on the Yuba River in northern California. A deep coring campaign was done in May-June 2002 and a shallow sampling campaign was completed in October 2002. This work assessed the chemical composition of material deposited in the reservoir between 1940, the year Englebright Dam was completed, and 2002 as part of the Upper Yuba River Studies Program, an effort designed to evaluate the feasibility of introducing anadromous fish, including steelhead and spring-run Chinook salmon, upstream from Englebright Dam. Results of analyses of total mercury (HgT) in 444 subsamples, methylmercury (MeHg) in 243 subsamples, and other trace and major elements in 202 subsamples are presented. Data quality was evaluated on the basis of analyses of replicate pairs of subsamples, standard reference materials, blanks, and spike additions.Deep coring penetrated the full thickness of material deposited after 1940 at six locations in the reservoir; the cores reached a maximum depth of 32.8 meters below the reservoir floor. At the three deep coring sites closest to Englebright Dam, concentrations of HgT (dry basis) were consistently in the range of 100 to 500 ng/g (nanogram per gram), in sediment dominantly of silt size (median grain size of 0.004 to 0.063 mm [millimeter]). At the deep coring sites located farther upstream, the upper parts of the profile had lower concentrations of HgT, generally ranging from 2 to 100 ng/g, in sediment dominantly of sand size (median grain size from 0.063 to 2 mm). The lower part of the vertical profiles at three upstream coring sites had higher concentrations of HgT than the upper and middle parts of these profiles, and had finer median grain size. The highest median concentration of MeHg (1.1 ng/g) was in the top 2 cm (centimeter) of the shallow box cores. This vertical interval also had the highest value of the ratio of MeHg to HgT, 0.41 percent. Median concentrations of MeHg and median values of MeHg/HgT decreased systematically with depth from 0-4 to 4-8 to 8-12 cm in the shallow cores. However, similar systematic decreases were not observed at the meter scale in the deep cores of the MEM (MEthylMercury) series. The overall median of the ratio MeHg/HgT in the deep cores was 0.25 percent, not much less than the overall median value for the shallow cores (0.33 percent). Mercury-203 radiotracer divalent inorganic mercury (203Hg(II)) was used to determine microbial mercury-methylation potential rates for 11 samples collected from three reservoir locations and various depths in the sediment profile. For the five shallow mercury-methylation subsamples, ancillary geochemical parameters were assayed, including microbial sulfate reduction rates, sulfur speciation (sediment acid volatile sulfide, total reduced sulfur, and pore-water sulfate), iron speciation (sediment acid extractable iron(II), amorphous iron(III), crystalline iron(III) and pore-water iron(II)), pore-water chloride and dissolved organic carbon, and pH, oxidation-reduction potential (Eh) and whole-sediment organic content. The highest potential rates of microbial mercury methylation were measured in shallow (0 to 8 cm depth) sediments (5 to 30 nanograms of mercury per gram dry sediment per day), whereas potential rates for subsamples collected from depths greater than 500 cm were consistently below the detection limit of the radiotracer method (< 0.02 nanogram of mercury per gram dry sediment per day). Chemical analyses of trace and major elements in bed sediment are presented for 202 samples from deep cores from five locations in Englebright Lake. The mean values and standard deviations for selected trace elements were as follows (in micrograms per gram): antimony, 2.4 ± 1.6; arsenic, 69 ± 48; chromium, 134 ± 23; lead, 33 ± 25; and nickel, 87 ± 24. Concentrated samples of heavy-mineral grains, prepared using nine large-volume composite samples from","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ds151","collaboration":"Prepared in cooperation with the CALFED Ecosystem Restoration Program California Bay--Delta Authority and the California Resources Agency","usgsCitation":"Alpers, C.N., Hunerlach, M.P., Marvin-DePasquale, M.C., Antweiler, R.C., Lasorsa, B.K., De Wild, J.F., and Snyder, N., 2006, Geochemical data for mercury, methylmercury, and other constituents in sediments from Englebright Lake, California, 2002: U.S. Geological Survey Data Series 151, 107 p., https://doi.org/10.3133/ds151.","productDescription":"107 p.","numberOfPages":"107","onlineOnly":"Y","additionalOnlineFiles":"Y","temporalStart":"2002-01-01","temporalEnd":"2002-12-31","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":190683,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":274140,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/ds/2006/151/ds_151.pdf","text":"Report"},{"id":274139,"rank":3,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/ds/2006/151/"}],"country":"United States","state":"California","otherGeospatial":"Englebright Lake","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -121.27121,39.24487 ], [ -121.27121,39.29387 ], [ -121.21188,39.29387 ], [ -121.21188,39.24487 ], [ -121.27121,39.24487 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b23e4b07f02db6ae387","contributors":{"authors":[{"text":"Alpers, Charles N. 0000-0001-6945-7365 cnalpers@usgs.gov","orcid":"https://orcid.org/0000-0001-6945-7365","contributorId":411,"corporation":false,"usgs":true,"family":"Alpers","given":"Charles","email":"cnalpers@usgs.gov","middleInitial":"N.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":512523,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hunerlach, Michael P.","contributorId":66668,"corporation":false,"usgs":true,"family":"Hunerlach","given":"Michael","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":512529,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marvin-DePasquale, Mark C.","contributorId":38655,"corporation":false,"usgs":true,"family":"Marvin-DePasquale","given":"Mark","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":512526,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Antweiler, Ronald C. 0000-0001-5652-6034 antweil@usgs.gov","orcid":"https://orcid.org/0000-0001-5652-6034","contributorId":1481,"corporation":false,"usgs":true,"family":"Antweiler","given":"Ronald","email":"antweil@usgs.gov","middleInitial":"C.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":512524,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lasorsa, Brenda K.","contributorId":45398,"corporation":false,"usgs":true,"family":"Lasorsa","given":"Brenda","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":512528,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"De Wild, John F.","contributorId":31800,"corporation":false,"usgs":true,"family":"De Wild","given":"John","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":512525,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Snyder, Noah P.","contributorId":43848,"corporation":false,"usgs":true,"family":"Snyder","given":"Noah P.","affiliations":[],"preferred":false,"id":512527,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":5224628,"text":"5224628 - 2006 - Importance of riparian forests in urban catchments contingent on sediment and hydrologic regimes","interactions":[],"lastModifiedDate":"2016-12-07T10:37:29","indexId":"5224628","displayToPublicDate":"2010-06-16T12:18:55","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1547,"text":"Environmental Management","active":true,"publicationSubtype":{"id":10}},"title":"Importance of riparian forests in urban catchments contingent on sediment and hydrologic regimes","docAbstract":"Forested riparian corridors are thought to minimize impacts of landscape disturbance on stream ecosystems; yet, the effectiveness of streamside forests in mitigating disturbance in urbanizing catchments is unknown. We expected that riparian forests would provide minimal benefits for fish assemblages in streams that are highly impaired by sediment or hydrologic alteration. We tested this hypothesis in 30 small streams along a gradient of urban disturbance (1–65% urban land cover). Species expected to be sensitive to disturbance (i.e., fluvial specialists and “sensitive” species that respond negatively to urbanization) were best predicted by models including percent forest cover in the riparian corridor and a principal components axis describing sediment disturbance. Only sites with coarse bed sediment and low bed mobility (vs. sites with high amounts of fine sediment) had increased richness and abundances of sensitive species with higher percent riparian forests, supporting our hypothesis that response to riparian forests is contingent on the sediment regime. Abundances of Etheostoma scotti, the federally threatened Cherokee darter, were best predicted by models with single variables representing stormflow (r2 = 0.34) and sediment (r2 = 0.23) conditions. Lentic-tolerant species richness and abundance responded only to a variable representing prolonged duration of low-flow conditions. For these species, hydrologic alteration overwhelmed any influence of riparian forests on stream biota. These results suggest that, at a minimum, catchment management strategies must simultaneously address hydrologic, sediment, and riparian disturbance in order to protect all aspects of fish assemblage integrity.
","language":"English","publisher":"Springer","doi":"10.1007/s00267-005-0029-1","usgsCitation":"Roy, A., Freeman, M.C., Freeman, B.J., Wenger, S., Meyer, J., and Ensign, W., 2006, Importance of riparian forests in urban catchments contingent on sediment and hydrologic regimes: Environmental Management, v. 47, no. 4, p. 523-539, https://doi.org/10.1007/s00267-005-0029-1.","productDescription":"17 p.","startPage":"523","endPage":"539","numberOfPages":"17","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201663,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"47","issue":"4","noUsgsAuthors":false,"publicationDate":"2006-02-07","publicationStatus":"PW","scienceBaseUri":"4f4e49fde4b07f02db5f5f45","contributors":{"authors":[{"text":"Roy, A.H.","contributorId":24065,"corporation":false,"usgs":true,"family":"Roy","given":"A.H.","email":"","affiliations":[],"preferred":false,"id":342150,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Freeman, Mary C. 0000-0001-7615-6923","orcid":"https://orcid.org/0000-0001-7615-6923","contributorId":99659,"corporation":false,"usgs":true,"family":"Freeman","given":"Mary","email":"","middleInitial":"C.","affiliations":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"preferred":false,"id":342154,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Freeman, B. J.","contributorId":8031,"corporation":false,"usgs":true,"family":"Freeman","given":"B.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":342149,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wenger, S.J.","contributorId":51883,"corporation":false,"usgs":true,"family":"Wenger","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":342151,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Meyer, J.L.","contributorId":73316,"corporation":false,"usgs":true,"family":"Meyer","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":342153,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ensign, W.E.","contributorId":66382,"corporation":false,"usgs":true,"family":"Ensign","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":342152,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":5224612,"text":"5224612 - 2006 - A spatially explicit decision support model for restoration of forest bird habitat","interactions":[],"lastModifiedDate":"2012-02-02T00:15:06","indexId":"5224612","displayToPublicDate":"2010-06-16T12:18:54","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1321,"text":"Conservation Biology","active":true,"publicationSubtype":{"id":10}},"title":"A spatially explicit decision support model for restoration of forest bird habitat","docAbstract":"The historical area of bottomland hardwood forest in the Mississippi Alluvial Valley has been reduced by >75%. Agricultural production was the primary motivator for deforestation; hence, clearing deliberately targeted higher and drier sites. Remaining forests are highly fragmented and hydrologically altered, with larger forest fragments subject to greater inundation, which has negatively affected many forest bird populations. We developed a spatially explicit decision support model, based on a Partners in Flight plan for forest bird conservation, that prioritizes forest restoration to reduce forest fragmentation and increase the area of forest core (interior forest >1 km from 'hostile' edge). Our primary objective was to increase the number of forest patches that harbor >2000 ha of forest core, but we also sought to increase the number and area of forest cores >5000 ha. Concurrently, we targeted restoration within local (320 km2) landscapes to achieve >60% forest cover. Finally, we emphasized restoration of higher-elevation bottomland hardwood forests in areas where restoration would not increase forest fragmentation. Reforestation of 10% of restorable land in the Mississippi Alluvial Valley (approximately 880,000 ha) targeted at priorities established by this decision support model resulted in approximately 824,000 ha of new forest core. This is more than 32 times the amount of core forest added through reforestation of randomly located fields (approximately 25,000 ha). The total area of forest core (1.6 million ha) that resulted from targeted restoration exceeded habitat objectives identified in the Partners in Flight Bird Conservation Plan and approached the area of forest core present in the 1950s.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Conservation Biology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","collaboration":"doi: 10.1111/j.1523-1739.2005.00303.x 6496_Twedt.pdf","usgsCitation":"Twedt, D., Uihlein, W., and Elliott, A., 2006, A spatially explicit decision support model for restoration of forest bird habitat: Conservation Biology, v. 20, no. 1, p. 100-110.","productDescription":"100-110","startPage":"100","endPage":"110","numberOfPages":"11","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":198250,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":17549,"rank":200,"type":{"id":11,"text":"Document"},"url":"https://www3.interscience.wiley.com/journal/118564086/abstract","linkFileType":{"id":5,"text":"html"}}],"volume":"20","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b17e4b07f02db6a6387","contributors":{"authors":[{"text":"Twedt, D.J. 0000-0003-1223-5045","orcid":"https://orcid.org/0000-0003-1223-5045","contributorId":105009,"corporation":false,"usgs":true,"family":"Twedt","given":"D.J.","affiliations":[],"preferred":false,"id":342082,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Uihlein, W.B. III","contributorId":44636,"corporation":false,"usgs":true,"family":"Uihlein","given":"W.B.","suffix":"III","affiliations":[],"preferred":false,"id":342080,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Elliott, A.B.","contributorId":73712,"corporation":false,"usgs":true,"family":"Elliott","given":"A.B.","email":"","affiliations":[],"preferred":false,"id":342081,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":5224710,"text":"5224710 - 2006 - The role of the Wetland Reserve Program in conservation efforts in the Mississippi River Alluvial Valley","interactions":[],"lastModifiedDate":"2016-07-08T15:35:45","indexId":"5224710","displayToPublicDate":"2010-06-16T12:18:31","publicationYear":"2006","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3779,"text":"Wildlife Society Bulletin","onlineIssn":"1938-5463","printIssn":"0091-7648","active":true,"publicationSubtype":{"id":10}},"title":"The role of the Wetland Reserve Program in conservation efforts in the Mississippi River Alluvial Valley","docAbstract":"The Mississippi River Alluvial Valley includes the floodplain of the Mississippi River from Cairo, Illinois, USA, to the Gulf of Mexico. Originally this region supported about 10 million ha of bottomland hardwood forests, but only about 2.8 million ha remain today. Furthermore, most of the remaining bottomland forest is highly fragmented with altered hydrologic processes. During the 1990s landscape-scale conservation planning efforts were initiated for migratory birds and the threatened Louisiana black bear (Ursus americanus luteolus). These plans call for large-scale reforestation and restoration efforts in the region, particularly on private lands. In 1990 the Food, Agriculture, Conservation and Trade Act authorized the Wetlands Reserve Program (WRP). The WRP is a voluntary program administered by the United States Department of Agriculture that provides eligible landowners with financial incentives to restore wetlands and retire marginal farmlands from agricultural production. As of 30 September 2005, over 275,700 ha have been enrolled in the program in the Mississippi River Alluvial Valley, with the greatest concentration in Louisiana, Arkansas, and Mississippi, USA. Hydrologic restoration is common on most sites, with open-water wetlands, such as moist-soil units and sloughs, constituting up to 30% of a given tract. Over 33,200 ha of open-water wetlands have been created, potentially providing over 115,000,000 duck-use days. Twenty-three of 87 forest-bird conservation areas have met or exceed core habitat goals for migratory songbirds and another 24 have met minimum area requirements. The WRP played an integral role in the fulfillment of these goals. Although some landscape goals have been attained, the young age of the program and forest stands, and the lack of monitoring, has limited evaluations of the program's impact on wildlife populations.
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