Estuarine Ecology of Juvenile Salmon in Western Alaska: a Review
Christian E. Zimmerman, Nicola Hillgruber
2009, Book chapter, American Fisheries Society Symposium
In the late 1990s and early 2000s, large declines in numbers of chum salmon Oncorhynchus keta and Chinook salmon O. tshawytscha returning to the Arctic-YukonKuskokwim (AYK) region (Alaska, USA) illuminated the need for an improved understanding of the variables controlling salmon abundance at all life stages. In addressing questions about...
Improving conceptual models of water and carbon transfer through peat
Jeffery M. McKenzie, Donald I. Siegel, Donald O. Rosenberry
Andrew J. Baird, Lisa R. Belyea, Xavier Comas, A.S. Reeve, Lee D. Slater, editor(s)
2009, Book chapter, Carbon cycling in northern peatlands: Geophysical Monograph Series
Northern peatlands store 500 × 1015 g of organic carbon and are very sensitive to climate change. There is a strong conceptual model of sources, sinks, and pathways of carbon within peatlands, but challenges remain both in understanding the hydrogeology and the linkages between carbon cycling and peat pore water...
Polybrominated diphenyl ether flame retardants in eggs may reduce reproductive success of ospreys in Oregon and Washington, USA
Charles J. Henny, J. L. Kaiser, R. A. Grove, Branden L. Johnson, R. J. Letcher
2009, Ecotoxicology (18) 802-813
Spatial and temporal assessments and reports of polybrominated diphenyl ether (PBDE) flame retardants in birds remain sparse. In the present study, PBDEs were detected in all 120 osprey (Pandion haliaetus) eggs collected. The eggs were collected from nests along the Columbia, Willamette and Yakima rivers of Oregon (OR) and Washington...
Status and trends of prey fish populations in Lake Michigan, 2008
David B. Bunnell, Charles P. Madenjian, Jeffrey D. Holuszko, Timothy J. Desorcie, Jean V. Adams
2009, Report
The Great Lakes Science Center (GLSC) has conducted lake-wide surveys of the fish community in Lake Michigan each fall since 1973 using standard 12-m bottom trawls towed along contour at depths of 9 to 110 m at each of seven index transects. The resulting data on relative abundance, size structure,...
Identification guide to skates (Family Rajidae) of the Canadian Atlantic and adjacent regions
Kenneth J. Sulak, P. D. MacWhirter, K.E. Luke, A.D. Norem, J.M. Miller, J.A. Cooper, L.E. Harris
2009, Report
Ecosystem-based management requires sound information on the distribution and abundance of species both common and rare. Therefore, the accurate identification for all marine species has assumed a much greater importance. The identification of many skate species is difficult as several are easily confused and has been found to be problematic...
Status of pelagic prey fishes and pelagic macroinvertebrates in Lake Michigan, 2008
David M. Warner, Randall M. Claramunt, Jeffrey D. Holuszko, Timothy J. Desorcie
2009, Conference Paper
Acoustic surveys were conducted in late summer/early fall during the years 1992-1996 and 2001-2008 to estimate pelagic prey fish biomass in Lake Michigan. Midwater trawling during the surveys provided a measure of species and size composition of the fish community for use in scaling acoustic data and providing species-specific abundance...
Surveillance and status of fish stocks in western Lake Erie, 2008
Michael T. Bur, William Edwards, Michael J. Porta, Martin A. Stapanian, Patrick Kocovsky
2009, Conference Paper
The Lake Erie Biological Station has conducted bottom trawl assessments of fish populations in western Lake Erie near East Harbor State Park, Ohio each summer and autumn since 1961. The catches of most age-0 forage fishes in 2008 were less than their 15-year means. Mean densities for five species exceeded...
Systematic approaches to comprehensive analyses of natural organic matter
Jerry A. Leenheer
2009, Annals of Environmental Science (3) 1-130
The more that is learned of the chemistry of aquatic natural organic matter (NOM) the greater is the scientific appreciation of the vast complexity of this subject. This complexity is due not only to a multiplicity of precursor molecules in any environment but to their associations with each other and...
Great Lakes prey fish populations: A cross-basin overview of status and trends in 2008
Owen T. Gorman, David B. Bunnell
2009, Conference Paper
Assessments of prey fishes in the Great Lakes have been conducted annually since the 1970s by the Great Lakes Science Center, sometimes assisted by partner agencies. Prey fish assessments differ among lakes in the proportion of a lake covered, seasonal timing, bottom trawl gear used, sampling design, and the manner...
Ages and lengths of yellow perch Perca flavescens, white perch Morone americana, and lake whitefish Coregonus clupeaformis in commercial trap nets in western Lake Erie
Martin A. Stapanian, William Edwards, Michael J. Porta, Michael T. Bur, Patrick Kocovsky
2009, Conference Paper
We collected samples of yellow perch (Perca flavescens) and white perch (Morone americana) in spring, and of lake whitefish (Coregonus clupeaformis) in autumn, from commercial trap nets set in western Lake Erie in 2008. The yellow perch sample (N = 153) was dominated (72%, of the total sample) by...
Eruption-related lahars and sedimentation response downstream of Mount Hood: Field guide to volcaniclastic deposits along the Sandy River, Oregon
Tom C. Pierson, William E. Scott, James W. Vallance, Patrick T. Pringle
Jim O’Connor, Rebecca Dorsey, Ian Madin, editor(s)
2009, Book chapter, Volcanoes to vineyards: Geologic field trips through the dynamic landscape of the Pacific Northwest
Late Holocene dome-building eruptions at Mount Hood during the Timberline and Old Maid eruptive periods resulted in numerous dome-collapse pyroclastic flows and lahars that moved large volumes of volcaniclastic sediment into temporary storage in headwater canyons of the Sandy River. During each eruptive period, accelerated sediment loading to the river...
Otters, Marine
James A. Estes, James L. Bodkin, M. Ben-David
William F. Perrin, Bernd Wursing, J.G.M. Thewissen, editor(s)
2009, Book chapter, Encyclopedia of marine mammals (second edition)
The otters (Mustelidae; Lutrinae) provide an exceptional perspective into the evolution of marine living by mammals. Most extant marine mammals (e.g. the cetaceans, pinnipeds, and sirenians) have been so highly modified by long periods of selection for life in the sea that they bear little resemblance to their terrestrial ancestors....
Combined use of frequency‐domain electromagnetic and electrical resistivity surveys to delineate the freshwater/saltwater interface near saline lakes in the Nebraska Sand Hills, Nebraska, USA
John T. Ong, Eric A. White, John W. Lane Jr., Todd Halihan, Vitaly A Zlotnik
Dwain K. Butler, editor(s)
2009, Conference Paper, Proceedings of the Symposium on the Application of Geophysics to Engineering and Environmental Problems 2009
We investigate the use of frequency‐domain electromagnetic (FDEM) and electrical resistivity (ER) surveys for rapid and detailed characterization of the direction of lake‐aquifer fluxes and the configuration of salt plumes generated from saline lakes. This methodology was developed and applied at several lakes in the Nebraska Sand Hills, Nebraska, in...
SToRM: A numerical model for environmental surface flows
Francisco J. Simoes
2009, Conference Paper, 33rd IAHR Congress: Water Engineering for a Sustainable Environment
SToRM (System for Transport and River Modeling) is a numerical model developed to simulate free surface flows in complex environmental domains. It is based on the depth-averaged St. Venant equations, which are discretized using unstructured upwind finite volume methods, and contains both steady and unsteady solution techniques. This article provides...
Linking habitat quality with trophic performance of steelhead along forest gradients in the South Fork Trinity River Watershed, California
Sarah G. McCarthy, Jeffrey J. Duda, John M. Emlen, Garth R. Hodgson, David A. Beauchamp
2009, Transactions of the American Fisheries Society (138) 506-521
We examined invertebrate prey, fish diet, and energy assimilation in relation to habitat variation for steelhead Oncorhynchus mykiss (anadromous rainbow trout) and rainbow trout in nine low-order tributaries of the South Fork Trinity River, northern California. These streams spanned a range of environmental conditions, which allowed us to use bioenergetics...
Does a lack of design and repeatability compromise scientific criticism? A Response to Smith et al. (2009)
Michael B. Wunder, Keith A. Hobson, Jeff Kelly, Peter P. Marra, Leonard I Wassenaar, Craig A. Stricker, Richard R. Doucett
2009, The Auk (126) 922-926
In a recent paper published in The Auk, Smith et al. (2009) raised serious concerns over an apparent lack of reproducibility in their study of stable hydrogen isotope values (δDf ) in raptor feathers. The authors based their concerns on results obtained from different laboratories to which they submitted original...
Movement and habitat use of sika and white-tailed deer on Assateague Island National Seashore, Maryland
Duane R. Diefenbach, Sonja Christensen
2009, Technical Report NPS/NER/NRTR—2009/140
This research project was conducted to describe habitat use of sika deer (Cervus nippon) and white-tailed deer (Odocoileus virginianus) and possibly attribute the effects of ungulate herbivory to specific deer species, if spatial separation in habitat use could be identified. Sturm (2007) conducted an exclosure study to document the effect...
A review of plague persistence with special emphasis on fleas
Jeffrey Wimsatt, Dean E. Biggins
2009, Journal of Vector Borne Diseases (46) 85-99
Sylvatic plague is highly prevalent during infrequent epizootics that ravage the landscape of western North America. During these periods, plague dissemination is very efficient. Epizootics end when rodent and flea populations are decimated and vectored transmission declines. A second phase (enzootic plague) ensues when plague is difficult to detect from...
Interactions between soil thermal and hydrological dynamics in the response of Alaska ecosystems to fire disturbance
Shuhua Yi, A. David McGuire, Jennifer Harden, Eric Kasischke, Kristen L. Manies, Larry Hinzman, Anna K. Liljedahl, J. Randerson, Heping Liu, Vladimir E. Romanovsky, Sergey S. Marchenko, Yongwon Kim
2009, Journal of Geophysical Research: Biogeosciences (114)
Soil temperature and moisture are important factors that control many ecosystem processes. However, interactions between soil thermal and hydrological processes are not adequately understood in cold regions, where the frozen soil, fire disturbance, and soil drainage play important roles in controlling interactions among these processes. These interactions were investigated with...
Sensitivity analysis, calibration, and testing of a distributed hydrological model using error‐based weighting and one objective function
L. Foglia, Mary C. Hill, Steffen W. Mehl, P. Burlando
2009, Water Resources Research (45)
We evaluate the utility of three interrelated means of using data to calibrate the fully distributed rainfall‐runoff model TOPKAPI as applied to the Maggia Valley drainage area in Switzerland. The use of error‐based weighting of observation and prior information data, local sensitivity analysis, and single‐objective function nonlinear regression provides quantitative...
Airborne gamma-ray and magnetic anomaly signatures of serpentinite in relation to soil geochemistry, northern California
A. E. McCafferty, B. S. Van Gosen
2009, Applied Geochemistry (24) 1524-1537
Serpentinized ultramafic rocks and associated soils in northern California are characterized by high concentrations of Cr and Ni, low levels of radioelements (K, Th, and U) and high amounts of ferrimagnetic minerals (primarily magnetite). Geophysical attributes over ultramafic rocks, which include airborne gamma-ray and magnetic anomaly data, are quantified and...
Migratory patterns and population structure among breeding and wintering red-breasted mergansers (Mergus serrator) and common mergansers (M. merganser)
John M. Pearce, K. G. McCracken, Thomas K. Christensen, Y.N. Zhuravlev
2009, The Auk (126) 784-798
Philopatry has long been assumed to structure populations of waterfowl and other species of birds genetically, especially via maternally transmitted mitochondrial DNA (mtDNA), yet other migratory behaviors and nesting ecology (use of ground vs. cavity sites) may also contribute to population genetic structure. We investigated the effects of migration and...
Dust emission at Franklin Lake Playa, Mojave Desert (USA): Response to meteorological and hydrologic changes 2005-2008
Richard L. Reynolds, Rian Bogle, John Vogel, Harland L. Goldstein, James Yount
2009, Natural Resources and Environmental Issues (15)
Playa type, size, and setting; playa hydrology; and surface-sediment characteristics are important controls on the type and amount of atmospheric dust emitted from playas. Soft, evaporite-rich sediment develops on the surfaces of some Mojave Desert (USA) playas (wet playas), where the water table is shallow (< 4 m). These areas...
Derivation of habitat-specific dissolved oxygen criteria for Chesapeake Bay and its tidal tributaries
Richard A. Batiuk, Denise L. Breitburg, Robert J. Diaz, Thomas M. Cronin, David H. Secor, Glen Thursby
2009, Journal of Experimental Marine Biology and Ecology (381) S204-S215
The Chesapeake 2000 Agreement committed its state and federal signatories to “define the water quality conditions necessary to protect aquatic living resources” in the Chesapeake Bay (USA) and its tidal tributaries. Hypoxia is one of the key water quality issues addressed as a result of the above Agreement. This paper...
Volumetric visualization of multiple-return LIDAR data: Using voxels
Jason M. Stoker
2009, Photogrammetric Engineering and Remote Sensing (75) 109-112
Elevation data are an important component in the visualization and analysis of geographic information. The creation and display of 3D models representing bare earth, vegetation, and surface structures have become a major focus of light detection and ranging (lidar) remote sensing research in the past few years. Lidar is an...
