Habitat requirements of the endangered California freshwater shrimp (Syncaris pacifica) in lagunitas and Olema creeks, Marin County, California, USA
Barbara A. Martin, Michael K. Saiki, Darren Fong
2009, Journal of Crustacean Biology (29) 595-604
This study was conducted to better understand the habitat requirements and environmental limiting factors of Syncaris pacifica, the California freshwater shrimp. This federally listed endangered species is native to perennial lowland streams in a few watersheds in northern California. Field sampling occurred in Lagunitas and Olema creeks at seasonal intervals...
Extraction of lidar-based dune-crest elevations for use in examining the vulnerability of beaches to inundation during hurricanes
H.F. Stockdon, K.S. Doran, A. H. Sallenger Jr.
2009, Journal of Coastal Research 59-65
The morphology of coastal sand dunes plays an important role in determining how a beach will respond to a hurricane. Accurate measurements of dune height and position are essential for assessing the vulnerability of beaches to extreme coastal change during future landfalls. Lidar topographic surveys provide rapid, accurate, high-resolution datasets...
Estimation of avian population sizes and species richness across a boreal landscape in Alaska
Colleen M. Handel, S.A. Swanson, Debora A. Nigro, Steven M. Matsuoka
2009, Wilson Journal of Ornithology (121) 528-547
We studied the distribution of birds breeding within five ecological landforms in Yukon-Charley Rivers National Preserve, a 10,194-km2 roadless conservation unit on the Alaska-Canada border in the boreal forest zone. Passerines dominated the avifauna numerically, comprising 97% of individuals surveyed but less than half of the 115 species recorded in...
Diets of three species of anurans from the cache creek watershed, California, USA
R. L. Hothem, A.M. Meckstroth, K.E. Wegner, M.R. Jennings, J.J. Crayon
2009, Journal of Herpetology (43) 275-283
We evaluated the diets of three sympatric anuran species, the native Northern Pacific Treefrog, Pseudacris regilla, and Foothill Yellow-Legged Frog, Rana boylii, and the introduced American Bullfrog, Lithobates catesbeianus, based on stomach contents of frogs collected at 36 sites in 1997 and 1998. This investigation was part of a study...
Wildlife use of back channels associated with islands on the Ohio River
A.K. Zadnik, James T. Anderson, P.B. Wood, K. Bledsoe
2009, Wetlands (29) 543-551
The back channels of islands on the Ohio River are assumed to provide habitat critical for several wildlife species. However, quantitative information on the wildlife value of back channels is needed by natural resource managers for the conservation of these forested islands and embayments in the face of increasing shoreline...
Response of Halimeda to ocean acidification: Field and laboratory evidence
L. L. Robbins, P. O. Knorr, P. Hallock
2009, Biogeosciences Discussions (6) 4895-4918
Rising atmospheric pCO2 levels are changing ocean chemistry more dramatically now than in the last 20 million years. In fact, pHvalues of the open ocean have decreased by 0.1 since the 1800s and are predicted to decrease 0.1-0.4 globally in the next 90 years. Ocean acidification will affect fundamental geochemical...
High-resolution seismic-reflection images across the ICDP-USGS Eyreville deep drilling site, Chesapeake Bay impact structure
David S. Powars, Rufus D. Catchings, Mark R. Goldman, Gregory Gohn, J. Wright Horton, Jr., Lucy E. Edwards, Michael J. Rymer, G. Gandhok
2009, Special Paper of the Geological Society of America 209-233
The U.S. Geological Survey (USGS) acquired two 1.4-km-long, high-resolution (~5 m vertical resolution) seismic-reflection lines in 2006 that cross near the International Continental Scientific Drilling Program (ICDP)–USGS Eyreville deep drilling site located above the late Eocene...
Holocene sea-level changes along the North Carolina Coastline and their implications for glacial isostatic adjustment models
B. P. Horton, W.R. Peltier, S.J. Culver, R. Drummond, S.E. Engelhart, A.C. Kemp, D. Mallinson, E.R. Thieler, S.R. Riggs, D.V. Ames, K.H. Thomson
2009, Quaternary Science Reviews (28) 1725-1736
We have synthesized new and existing relative sea-level (RSL) data to produce a quality-controlled, spatially comprehensive database from the North Carolina coastline. The RSL database consists of 54 sea-level index points that are quantitatively related to an appropriate tide level and assigned an error estimate, and a further 33 limiting...
Sediment yield from the tectonically active semiarid Western Transverse Ranges of California
J.A. Warrick, L.A.K. Mertes
2009, Geological Society of America Bulletin (121) 1054-1070
Sediment yields from the world's rivers are generally highest from steep drainage basins with weak lithology, active tectonics, or severe land-use impacts. Here, we evaluate sediment yields from the Western Transverse Ranges of California in an attempt to explain why they are two- to tenfold greater than the surrounding areas...
Foraminiferal assemblages in Biscayne Bay, Florida, USA: Responses to urban and agricultural influence in a subtropical estuary
E. A. Carnahan, A.M. Hoare, P. Hallock, B. H. Lidz, C. D. Reich
2009, Marine Pollution Bulletin (59) 221-233
This study assessed foraminiferal assemblages in Biscayne Bay, Florida, a heavily utilized estuary, interpreting changes over the past 65 years and providing a baseline for future comparisons. Analyses of foraminiferal data at the genus level revealed three distinct biotopes. The assemblage from the northern bay was characterized by stress-tolerant taxa, especially Ammonia,...
Use of airborne and terrestrial lidar to detect ground displacement hazards to water systems
J.P. Stewart, Jiawen Hu, R. E. Kayen, A.J. Lembo Jr., B.D. Collins, C.A. Davis, T. D. O’Rourke
2009, Journal of Surveying Engineering (135) 113-124
We investigate the use of multiepoch airborne and terrestrial lidar to detect and measure ground displacements of sufficient magnitude to damage buried pipelines and other water system facilities that might result, for example, from earthquake or rainfall-induced landslides. Lidar scans are performed at three sites with coincident measurements by total...
A multiscale analysis of coral reef topographic complexity using lidar-derived bathymetry
D.G. Zawada, J. C. Brock
2009, Journal of Coastal Research 6-15
Coral reefs represent one of the most irregular substrates in the marine environment. This roughness or topographic complexity is an important structural characteristic of reef habitats that affects a number of ecological and environmental attributes, including species diversity and water circulation. Little is known about the range of topographic complexity...
Spatial habitat use patterns of sea otters in coastal washington
K.L. Laidre, R.J. Jameson, E. Gurarie, S.J. Jeffries, H. Allen
2009, Journal of Mammalogy (90) 906-917
Sea otter (Enhydra lutris kenyoni) movements, home range, and activity budgets were described from data collected during very-high-frequency radiotelemetry studies of 75 individuals on the outer coast of Washington State between 1992 and 1999. Sea otters were located at least once per week from 22 accessible sites along the coast....
Wolf use of summer territory in northeastern Minnesota
D. J. Demma, L.D. Mech
2009, Journal of Wildlife Management (73) 380-384
Movements of wolves (Canis lupus) during summer 2003 and 2004 in the Superior National Forest were based around homesites but included extensive use of territories. Away from homesites, wolves used different areas daily, exhibiting rotational use. Mean daily range overlap was 22 (SE 0.02) and that of breeding wolves was...
Potential earthquake faults offshore Southern California, from the eastern Santa Barbara Channel south to Dana Point
M. A. Fisher, C.C. Sorlien, R. W. Sliter
2009, Special Paper of the Geological Society of America 271-290
Urban areas in Southern California are at risk from major earthquakes, not only quakes generated by long-recognized onshore faults but also ones that occur along poorly understood offshore faults. We summarize recent research findings concerning these lesser known faults. Research by the U.S. Geological Survey during the past five years...
A quarter-million years of paleoenvironmental change at Bear Lake, Utah and Idaho
D. S. Kaufman, Jordon Bright, W.E. Dean, J. G. Rosenbaum, K. Moser, R. Scott Anderson, Steven M. Colman, C.W. Heil Jr., Gonzalo Jiménez-Moreno, M.C. Reheis, K. R. Simmons
2009, Special Paper of the Geological Society of America 311-351
A continuous, 120-m-long core (BL00-1) from Bear Lake, Utah and Idaho, contains evidence of hydrologic and environmental change over the last two glacial-interglacial cycles. The core was taken at 41.95??N, 111.31??W, near the depocenter of the 60-m-deep, spring-fed, alkaline lake, where carbonate-bearing sediment has accumulated continuously. Chronological control is poor...
Provenance and palaeogeographic implications of Eocene-Oligocene sedimentary rocks in the northwestern Basin and Range
A.E. Egger, J.P. Colgan, C. York
2009, International Geology Review (51) 900-919
A thick sequence of uppermost Eocene to lower Oligocene volcaniclastic and sedimentary rocks is exposed at the base of the Warner Range in northeastern California. This isolated exposure provides insight into the palaeogeographic setting of the northwestern Basin and Range during this time period. Significant thinning of the unit over...
Age, geochemical composition, and distribution of Oligocene ignimbrites in the northern Sierra Nevada, California: Implications for landscape morphology, elevation, and drainage divide geography of the Nevadaplano
Elizabeth J. Cassel, Andrew T. Calvert, Stephan A. Graham
2009, International Geology Review (51) 723-742
To gain a better understanding of the topographic and landscape evolution of the Cenozoic Sierra Nevada and Basin and Range, we combine geochemical and isotopic age correlations with palaeoaltimetry data from widely distributed ignimbrites in the northern Sierra Nevada, California. A sequence of Oligocene rhyolitic ignimbrites is preserved across the...
Cumulative impacts of hurricanes on Florida mangrove ecosystems: Sediment deposition, storm surges and vegetation
T. J. Smith III, G.H. Anderson, K. Balentine, G. Tiling, G.A. Ward, K.R.T. Whelan
2009, Wetlands (29) 24-34
Hurricanes have shaped the structure of mangrove forests in the Everglades via wind damage, storm surges and sediment deposition. Immediate effects include changes to stem size-frequency distributions and to species relative abundance and density. Long-term impacts to mangroves are poorly understood at present. We examine impacts of Hurricane Wilma on...
Sedimentary constraints on late Quaternary lake-level fluctuations at Bear Lake, Utah and Idaho
J. P. Smoot, J. G. Rosenbaum
2009, Special Paper of the Geological Society of America 263-290
A variety of sedimentological evidence was used to construct the lake-level history for Bear Lake, Utah and Idaho, for the past ???25,000 years. Shorelines provide evidence of precise lake levels, but they are infrequently preserved and are poorly dated. For cored sediment similar to that in the modern lake, grain-size...
Mesohaline submerged aquatic vegetation survey along the U.S. gulf of Mexico coast, 2001 and 2002: A salinity gradient approach
J.H. Merino, J. Carter, S.L. Merino
2009, Gulf of Mexico Science (27) 9-20
Distribution of marine submerged aquatic vegetation (SAV; i.e., seagrass) in the northern Gulf of Mexico coast has been documented, but there are nonmarine submersed or SAV species occurring in estuarine salinities that have not been extensively reported. We sampled 276 SAV beds along the gulf coast in Florida, Alabama, Mississippi,...
Fine sediment affects on survival to emergence of robust redhorse
Cecil A. Jennings, E.W. Dilts, J.L. Shelton Jr., Ronald C. Peterson
2009, Environmental Biology of Fishes (87) 43-53
Robust redhorse (Moxostoma robustum) is a rare riverine sucker for which life history information is scarce. Spawning occurs over loose gravel substrate and eggs and larvae may be adversely affected by fine sediments among the gravel. A 2-year study was conducted to determine the threshold at which fine sediments are...
Large, Wetland-associated mayflies (Ephemeroptera) of glacier national park, Montana
R.L. Newell, B. R. Hossack
2009, Western North American Naturalist (69) 335-342
We describe species richness and habitat associations of mayflies (Ephemeroptera) collected during amphibian surveys of 355 water bodies in Glacier National Park (NP), Montana, in 20062008. We collected 9 taxa (in 7 genera) of mayflies that were identifiable to species. Callibaetis jerrugineus hageni was collected most frequently, followed by Siphlonurus...
Retention of riverine sediment and nutrient loads by coastal plain floodplains
G.B. Noe, C.R. Hupp
2009, Ecosystems (12) 728-746
Despite the frequent citation of wetlands as effective regulators of water quality, few quantitative estimates exist for their cumulative retention of the annual river loads of nutrients or sediments. Here we report measurements of sediment accretion and associated carbon, nitrogen, and phosphorus accumulation as sedimentation over feldspar marker horizons placed...
Survival rates of female greater sage-grouse in autumn and winter in Southeastern Oregon
R.G. Anthony, M.J. Willis
2009, Journal of Wildlife Management (73) 538-545
We estimated survival rates of 135 female greater sage-grouse (Centrocercus urophasianus) on 3 study areas in southeastern Oregon, USA during autumn and winter for 3 years. We used known-fate models in Program MARK to test for differences among study areas and years, investigate the potential influence of weather, and compute...
