Effects of experimental water table and temperature manipulations on ecosystem CO2 fluxes in an Alaskan rich fen
M.R. Chivers, M.R. Turetsky, J. M. Waddington, J.W. Harden, A. D. McGuire
2009, Ecosystems (12) 1329-1342
Peatlands store 30% of the world's terrestrial soil carbon (C) and those located at northern latitudes are expected to experience rapid climate warming. We monitored growing season carbon dioxide (CO2) fluxes across a factorial design of in situ water table (control, drought, and flooded plots) and soil warming (control vs....
The Neoglacial landscape and human history of Glacier Bay, Glacier Bay National Park and Preserve, southeast Alaska, USA
C. Connor, G. Streveler, A. Post, D. Monteith, W. Howell
2009, Holocene (19) 381-393
The Neoglacial landscape of the Huna Tlingit homeland in Glacier Bay is recreated through new interpretations of the lower Bay's fjordal geomorphology, late Quaternary geology and its ethnographic landscape. Geological interpretation is enhanced by 38 radiocarbon dates compiled from published and unpublished sources, as well as 15 newly dated samples....
Seasonal shifts in shelter and microhabitat use of drymarchon couperi (eastern indigo snake) in Georgia
N.L. Hyslop, R.J. Cooper, J.M. Meyers
2009, Copeia (2009) 458-464
Drymarchon couperi (Eastern Indigo Snake), a threatened species of the southeastern Coastal Plain of the United States, has experienced population declines because of extensive habitat loss and degradation across its range. In Georgia and northern Florida, the species is associated with longleaf pine habitats that support Gopherus polyphemus (Gopher Tortoise)...
The contemporary cement cycle of the United States
A. Kapur, H. G. Van Oss, G. Keoleian, S.E. Kesler, A. Kendall
2009, Journal of Material Cycles and Waste Management (11) 155-165
A country-level stock and flow model for cement, an important construction material, was developed based on a material flow analysis framework. Using this model, the contemporary cement cycle of the United States was constructed by analyzing production, import, and export data for different stages of the cement cycle. The United...
A comparison of complete mitochondrial genomes of silver carp hypophthalmichthys molitrix and bighead carp hypophthalmichthys nobilis: Implications for their taxonomic relationship and phylogeny
S.-F. Li, J.-W. Xu, Q.-L. Yang, C.H. Wang, Q. Chen, D.C. Chapman, G. Lu
2009, Journal of Fish Biology (74) 1787-1803
Based upon morphological characters, Silver carp Hypophthalmichthys molitrix and bighead carp Hypophthalmichthys nobilis (or Aristichthys nobilis) have been classified into either the same genus or two distinct genera. Consequently, the taxonomic relationship of the two species at the generic level remains equivocal. This issue is addressed by sequencing complete mitochondrial...
Salt marsh-mangrove interactions in Australasia and the Americas
Neil Saintilan, Kerrylee Rogers, Karen McKee
Gerardio M. E. Perillo, Eric Wolanski, Donald R. Cahoon, Mark M. Brinson, editor(s)
2009, Book chapter
No abstract available....
Post-fledging movements of juvenile Common Mergansers (mergus merganser) in Alaska as inferred by satellite telemetry
John M. Pearce, Margaret R. Petersen
2009, Waterbirds (32) 133-137
We implanted satellite transmitters into eight juvenile Common Mergansers to investigate post-fledging movements from their natal river in southcentral Alaska. Subsequently, they moved widely throughout portions of western and southcentral Alaska up to 750 km from their natal areas during fall and winter months. Transmitters of two birds (one male...
Impact of sampling strategy on stream load estimates in till landscape of the Midwest
P. Vidon, L.E. Hubbard, E. Soyeux
2009, Environmental Monitoring and Assessment (159) 367-379
Accurately estimating various solute loads in streams during storms is critical to accurately determine maximum daily loads for regulatory purposes. This study investigates the impact of sampling strategy on solute load estimates in streams in the US Midwest. Three different solute types (nitrate, magnesium, and dissolved organic carbon (DOC)) and...
Genetic structure of lake whitefish (Coregonus clupeaformis) in Lake Michigan
J.A. VanDeHey, Brian L. Sloss, Paul J. Peeters, T.M. Sutton
2009, Canadian Journal of Fisheries and Aquatic Sciences (66) 382-393
Genetic relationships among lake whitefish (Coregonus clupeaformis) spawning aggregates in Lake Michigan were assessed and used to predict a stock or management unit (MU) model for the resource. We hypothesized that distinct spawning aggregates represented potential MUs and that differences at molecular markers underlie population differentiation. Genetic stock identification using...
Murres, capelin and ocean climate: Inter-annual associations across a decadal shift
P.M. Regular, F. Shuhood, T. Power, W.A. Montevecchi, G.J. Robertson, D. Ballam, John F. Piatt, B. Nakashima
2009, Environmental Monitoring and Assessment (156) 293-302
To ensure energy demands for reproduction are met, it is essential that marine birds breed during periods of peak food availability. We examined associations of the breeding chronology of common murres (Uria aalge) with the timing of the inshore arrival of their primary prey, capelin (Mallotus villosus) from 1980 to...
Removal of phosphorus from agricultural wastewaters using adsorption media prepared from acid mine drainage sludge
Philip L. Sibrell, Gary A. Montgomery, Kelsey L. Ritenour, Travis W. Tucker
2009, Water Research (43) 2240-2250
Excess phosphorus in wastewaters promotes eutrophication in receiving waterways. A??cost-effective method for the removal of phosphorus from water would significantly reduce the impact of such wastewaters on the environment. Acid mine drainage sludge is a waste product produced by the neutralization of acid mine drainage, and consists mainly of the...
Analysis of methods to estimate spring flows in a karst aquifer
N. Sepulveda
2009, Ground Water (47) 337-349
Hydraulically and statistically based methods were analyzed to identify the most reliable method to predict spring flows in a karst aquifer. Measured water levels at nearby observation wells, measured spring pool altitudes, and the distance between observation wells and the spring pool were the parameters used to match measured spring...
Deformation of the late Miocene to Pliocene Inyo Surface, eastern Sierra region, California
A. S. Jayko
2009, Special Paper of the Geological Society of America 313-350
A middle and late Miocene erosion surface, the Inyo Surface, underlies late Miocene mafic flows in the White Mountains and late Miocene and (or) early Pliocene flows elsewhere in the eastern Sierra region. The Inyo Surface is correlated with an erosion surface that underlies late Miocene mafic flows in the...
Ecophysiology of "halarsenatibacter silvermanii" strain SLAS-1T, gen. nov., sp. nov., a facultative chemoautotrophic arsenate respirer from salt-saturated Searles Lake, California
J.S. Blum, S. Han, B. Lanoil, C. Saltikov, B. Witte, F.R. Tabita, S. Langley, T.J. Beveridge, L. Jahnke, R.S. Oremland
2009, Applied and Environmental Microbiology (75) 1950-1960
Searles Lake occupies a closed basin harboring salt-saturated, alkaline brines that have exceptionally high concentrations of arsenic oxyanions. Strain SLAS-1T was previously isolated from Searles Lake (R. S. Oremland, T. R. Kulp, J. Switzer Blum, S. E. Hoeft, S. Baesman, L. G. Miller, and J. F. Stolz, Science 308:1305-1308, 2005)....
Using nitrate dual isotopic composition (δ15N and δ18O) as a tool for exploring sources and cycling of nitrate in an estuarine system: Elkhorn Slough, California
Scott D. Wankel, Carol Kendall, Adina Paytan
2009, Journal of Geophysical Research G: Biogeosciences (114)
Nitrate (NO3−) concentrations and dual isotopic composition (δ15N and δ18O) were measured during various seasons and tidal conditions in Elkhorn Slough to evaluate mixing of sources of NO3− within this California estuary. We found the isotopic composition of NO3− was influenced most heavily by mixing of two primary sources with unique isotopic signatures,...
Sediment storage and transport in Pancho Rico Valley during and after the Pleistocene-Holocene transition, Coast Ranges of central California (Monterey County)
A.F. Garcia, S. A. Mahan
2009, Earth Surface Processes and Landforms (34) 1136-1150
Factors influencing sediment transport and storage within the 156??6 km2 drainage basin of Pancho Rico Creek (PRC), and sediment transport from the PRC drainage basin to its c. 11000 km2 mainstem drainage (Salinas River) are investigated. Numeric age estimates are determined by optically stimulated luminescence (OSL) dating on quartz grains...
Feeding ecology of arctic-nesting sandpipers during spring migration through the prairie pothole region
J.L. Eldridge, Gary L. Krapu, Douglas H. Johnson
2009, Journal of Wildlife Management (73) 248-252
We evaluated food habits of 4 species of spring-migrant calidrid sandpipers in the Prairie Pothole Region (PPR) of North Dakota. Sandpipers foraged in several wetland classes and fed primarily on aquatic dipterans, mostly larvae, and the midge family Chironomidae was the primary food eaten. Larger sandpiper species foraged in deeper...
Hurricane frequency and landfall distribution for coastal wetlands of the Gulf coast, USA
T.W. Doyle
2009, Wetlands (29) 35-43
The regularity and severity of tropical storms are major determinants controlling ecosystem structure and succession for coastal ecosystems. Hurricane landfall rates vary greatly with high and low frequency for given coastal stretches of the southeastern United States. Site-specific meteorological data of hurricane wind speeds and direction, however, are only available...
Regional nutrient trends in streams and rivers of the United States, 1993-2003
Lori A. Sprague, David L. Lorenz
2009, Environmental Science & Technology (43) 3430-3435
Trends in flow-adjusted concentrations (indicators of anthropogenic changes) and observed concentrations (indicators of natural and anthropogenic changes) of total phosphorus and total nitrogen from 1993 to 2003 were evaluated in the eastern, central, and western United States by adapting the Regional Kendall trend test to account for seasonality and spatial...
Review of fish diversity in the Lake Huron basin
E.F. Roseman, J.S. Schaeffer, P.J. Steen
2009, Conference Paper, Aquatic Ecosystem Health and Management
Lake Huron has a rich aquatic habitat diversity that includes shallow embayments, numerous tributaries, shallow mid-lake reef complexes, archipelagos, and profundal regions. These habitats provide support for warm, cool, and cold water fish communities. Diversity of fishes in Lake Huron reflects post-glaciation colonization events, current climate conditions, accidental and intentional...
Mid-Wisconsinan environments on the eastern Great Plains
R. G. Baker, E. Arthur Bettis III, R.D. Mandel, J.A. Dorale, G. G. Fredlund
2009, Quaternary Science Reviews (28) 873-889
Few sites on the eastern Great Plains contain paleobotanical records for the mid-Wisconsin. We report on four sites, two stream cutbanks and two quarry exposures, ranging in age from >50 to ???23.4 ka. The oldest site at >50 ka contains a suite of macrofossils from prairie and disturbed ground habitats,...
Internal tidal currents in the Gaoping (Kaoping) Submarine Canyon
I.-H. Lee, Y. #NAME? Wang, J.T. Liu, W.-S. Chuang, J. Xu
2009, Journal of Marine Systems (76) 397-404
Data from five separate field experiments during 2000-2006 were used to study the internal tidal flow patterns in the Gaoping (formerly spelled Kaoping) Submarine Canyon. The internal tides are large with maximum interface displacements of about 200??m and maximum velocities of over 100cm/s. They are characterized by a first-mode velocity...
Basal-topographic control of stationary ponds on a continuously moving landslide
J. A. Coe, J.P. McKenna, J. W. Godt, R.L. Baum
2009, Earth Surface Processes and Landforms (34) 264-279
The Slumgullion landslide in the San Juan Mountains of southwestern Colorado has been moving for at least the last few hundred years and has multiple ponds on its surface. We have studied eight ponds during 30 trips to the landslide between July 1998 and July 2007. During each trip, we...
Trophic relationships of small nonnative fishes in a natural creek and several agricultural drains flowing into the Salton Sea, and their potential, effects on the endangered desert pupfish
Barbara A. Martin, Michael K. Saiki
2009, Southwestern Naturalist (54) 156-165
This study was conducted to characterize trophic relationships of small nonnative fishes and to determine if predation by these fishes contributes to the decline of desert pupfish (Cyprinodon macularius), an endangered cyprinodont on the verge of extinction. We sampled 403 hybrid Mozambique tilapias (Oreochromis mossambica by O. urolepis), 107 redbelly...
Wetland use and feeding by lesser scaup during spring migration across the upper Midwest, USA
M.J. Anteau, A. D. Afton
2009, Wetlands (29) 704-712
Low food availability and forage quality and concomitant decreased lipid reserves of lesser scaup (Aythya affinis; hereafter scaup) during spring migration in the upper Midwest may partially explain reductions in the continental population of scaup. In springs 20042005, we examined wetland use and feeding activity of scaup on 356 randomly-selected...
