New and interesting species of the genus Muelleria (Bacillariophyta) from the Antarctic region and South Africa
B. Van De Vijver, G. Mataloni, L. Stanish, S. A. Spaulding
2010, Phycologia (49) 22-41
During a survey of the terrestrial diatom flora of some sub-Antarctic islands in the southern Indian and Atlantic Oceans and of the Antarctic continent, more than 15 taxa belonging to the genus Muelleria were observed. Nine of these taxa are described as new species using light and scanning electron microscopy....
Modern climate challenges and the geological record
Thomas M. Cronin
2010, American Paleontologist (18) 10-12
Today's changing climate poses challenges about the influence of human activity, such as greenhouse gas emissions and land use changes, the natural variability of Earth's climate, and complex feedback processes. Ice core and instrumental records show that over the last century, atmospheric carbon dioxide (CO2) concentrations have risen to 390...
Increase in lake trout reproduction in Lake Huron following the collapse of alewife: Relief from thiamine deficiency or larval predation?
J.D. Fitzsimons, S. Brown, L. Brown, D. Honeyfield, J. He, J.E. Johnson
2010, Aquatic Ecosystem Health & Management (13) 73-84
In the Great Lakes there is still uncertainty as to the population level effects of a thiamine deficiency on salmonines caused by high consumption of alewives Alosa pseudoharengus. A resurgence of lake trout Salvelinus namaycush reproduction in Lake Huron following the crash of alewife stocks between 2002 and 2004 provided...
Effects of simulated moose Alces alces browsing on the morphology of rowan Sorbus aucuparia
N.R.D. Jager, J. Pastor
2010, Wildlife Biology (16) 301-307
In much of northern Sweden moose Alces alces browse rowan Sorbus aucuparia heavily and commonly revisit previously browsed plants. Repeated browsing of rowan by moose has created some concern for its long-term survival in heavily browsed areas. We therefore measured how four years of simulated moose browsing at four population...
Hydrodynamic modeling of juvenile mussel dispersal in a large river: The potential effects of bed shear stress and other parameters
J.A. Daraio, L.J. Weber, T.J. Newton
2010, Conference Paper, Journal of the North American Benthological Society
Because unionid mussels have a parasitic larval stage, they are able to disperse upstream and downstream as larvae while attached to their host fish and with flow as juveniles after excystment from the host. Understanding unionid population ecology requires knowledge of the processes that affect juvenile dispersal prior to establishment....
Effects of egg order on organic and inorganic element concentrations and egg characteristics in tree swallows, tachycineta bicolor
Christine M. Custer, Brian R. Gray, Thomas W. Custer
2010, Environmental Toxicology and Chemistry (29) 909-921
The laying order of tree swallow eggs was identified from the Housatonic River, Berkshire County, Massachusetts, USA, and eggs were chemically analyzed individually to document possible effects of laying order on organic contaminant and inorganic element concentrations. Effects of laying order on other parameters such as egg weight, size, and...
Coal-tar-based parking lot sealcoat: An unrecognized source of PAH to settled house dust
B.J. Mahler, P. C. Van Metre, J.T. Wilson, M. Musgrove, T.L. Burbank, T.E. Ennis, T. J. Bashara
2010, Environmental Science & Technology (44) 894-900
Despite much speculation, the principal factors controlling concentrations of polycyclic aromatic hydrocarbons (PAH) in settled house dust (SHD) have not yet been identified. In response to recent reports that dust from pavement with coaltar-based sealcoat contains extremely high concentrations of PAH, we measured PAH in SHD from 23 apartments and...
Multi-species occurrence models to evaluate the effects of conservation and management actions
E.F. Zipkin, Royle J. Andrew, D.K. Dawson, S. Bates
2010, Biological Conservation (143) 479-484
Conservation and management actions often have direct and indirect effects on a wide range of species. As such, it is important to evaluate the impacts that such actions may have on both target and non-target species within a region. Understanding how species richness and composition differ as a result of...
Model selection bias and Freedman's paradox
P.M. Lukacs, K.P. Burnham, David R. Anderson
2010, Annals of the Institute of Statistical Mathematics (62) 117-125
In situations where limited knowledge of a system exists and the ratio of data points to variables is small, variable selection methods can often be misleading. Freedman (Am Stat 37:152-155, 1983) demonstrated how common it is to select completely unrelated variables as highly "significant" when the number of data points...
Sources of suspended-sediment flux in streams of the chesapeake bay watershed: A regional application of the sparrow model
J. W. Brakebill, S.W. Ator, G. E. Schwarz
2010, Journal of the American Water Resources Association (46) 757-776
We describe the sources and transport of fluvial suspended sediment in nontidal streams of the Chesapeake Bay watershed and vicinity. We applied SPAtially Referenced Regressions on Watershed attributes, which spatially correlates estimated mean annual flux of suspended sediment in nontidal streams with sources of suspended sediment and transport factors. According...
Conserving migratory land birds in the New World: Do we know enough?
John Faaborg, Richard T. Holmes, A.D. Anders, K.L. Bildstein, K.M. Dugger, S.A. Gauthreaux Jr., P. Heglund, K.A. Hobson, A.E. Jahn, Douglas H. Johnson, S.C. Latta, D.J. Levey, P.P. Marra, C.L. Merkord, E. Nol, S.I. Rothstein, T.W. Sherry, Sillett T. Scott, F. R. Thompson III, N. Warnock
2010, Ecological Applications (20) 398-418
Migratory bird needs must be met during four phases of the year: breeding season, fall migration, wintering, and spring migration; thus, management may be needed during all four phases. The bulk of research and management has focused on the breeding season, although several issues remain unsettled, including the spatial extent...
The release of dissolved nutrients and metals from coastal sediments due to resuspension
Linda H. Kalnejais, William R. Martin, Michael H. Bothner
2010, Marine Chemistry (121) 224-235
Coastal sediments in many regions are impacted by high levels of contaminants. Due to a combination of shallow water depths, waves, and currents, these sediments are subject to regular episodes of sediment resuspension. However, the influence of such disturbances on sediment chemistry and the release of solutes is poorly understood....
Modeling the relations between flow regime components, species traits, and spawning success of fishes in warmwater streams
S.W. Craven, J.T. Peterson, Mary C. Freeman, T.J. Kwak, E. Irwin
2010, Environmental Management (46) 181-194
Modifications to stream hydrologic regimes can have a profound influence on the dynamics of their fish populations. Using hierarchical linear models, we examined the relations between flow regime and young-of-year fish density using fish sampling and discharge data from three different warmwater streams in Illinois, Alabama, and Georgia. We used...
Using ecological function to develop recovery criteria for depleted species: Sea otters and kelp forests in the Aleutian archipelago
James A. Estes, M. Tim Tinker, James L. Bodkin
2010, Conservation Biology (24) 852-860
Recovery criteria for depleted species or populations normally are based on demographic measures, the goal being to maintain enough individuals over a sufficiently large area to assure a socially tolerable risk of future extinction. Such demographically based recovery criteria may be insufficient to restore the functional roles of strongly interacting...
Relationship of voluminous ignimbrites to continental arc plutons: Petrology of Jurassic ignimbrites and contemporaneous plutons in southern California
N. K. Fohey-Breting, A. P. Barth, J. L. Wooden, F.K. Mazdab, C.A. Carter, E.R. Schermer
2010, Journal of Volcanology and Geothermal Research (189) 1-11
Volcanism was broadly associated in both space and time with Mesozoic plutonism in the Cordillera continental margin arc, but the precise petrogenetic relationships between volcanic rocks and adjacent zoned plutons are not known. Igneous rocks in a tilted crustal section in California include four laterally extensive Jurassic ash flow tuffs...
Geomorphic knobs of Candor Chasma, Mars: New Mars Reconnaissance Orbiter data and comparisons to terrestrial analogs
Marjorie A. Chan, Jens Ormö, Scott L. Murchie, Chris Okubo, Goro Komatsu, James J. Wray, Patrick E. McGuire, James A. McGovern, the HiRISE TEam
2010, Icarus (205) 138-153
High Resolution Imaging Science Experiment (HiRISE) imagery and digital elevation models of the Candor Chasma region of Valles Marineris, Mars, reveal prominent and distinctive positive-relief knobs amidst light-toned layers. Three classifications of knobs, Types 1, 2, and 3, are distinguished from a combination of HiRISE and Thermal Emission Imaging System...
Current lineages of the epithelioma papulosum cyprini (EPC) cell line are contaminated with fathead minnow, Pimephales promelas, cells
J. Winton, W. Batts, P. DeKinkelin, M. LeBerre, M. Bremont, N. Fijan
2010, Journal of Fish Diseases (33) 701-704
Initially established from proliferative skin lesions of the common carp, Cyprinus carpio L., the epithelioma papulosum cyprini (EPC) cell line (Fijan, Sulimanovic, Bearzotti, Muzinic, Zwillenberg, Chilmonczyk, Vautherot & de Kinkelin 1983) has become one of the most widely used tools for research on fish viruses and the diagnosis of fish...
Rodents and lagomorphs (Mammalia) from the Hemphillian (late Miocene) of Utah
W.W. Korth, D. D. De Blieux
2010, Journal of Vertebrate Paleontology (30) 226-235
Four species of rodents (two heteromyids and two cricetids) and one lagomorph are identified from the late Tertiary Sevier River Formation of Utah. The heteromyids include a new genus and species of heteromyine, Metaliomys sevierensis, which is intermediate in morphology between the Clarendonian and early Hemphillian Diprionomys Kellogg and the...
Plant community, primary productivity, and environmental conditions following wetland re-establishment in the Sacramento-San Joaquin Delta, California
R. L. Miller, R. Fujii
2010, Wetlands Ecology and Management (18) 1-16
Wetland restoration can mitigate aerobic decomposition of subsided organic soils, as well as re-establish conditions favorable for carbon storage. Rates of carbon storage result from the balance of inputs and losses, both of which are affected by wetland hydrology. We followed the effect of water depth (25 and 55 cm)...
Recovery of Renibacterium salmoninarum from naturally infected salmonine stocks in Michigan using a modified culture protocol
M. Faisal, A.E. Eissa, C. E. Starliper
2010, Journal of Advanced Research (1) 95-102
Renibacterium salmoninarum, the causative agent of bacterial kidney disease (BKD), is a fastidious and slow-growing bacterium that is extremely difficult to grow in vitro. Herein, we describe a modified primary culture protocol that encompasses a modified bacteriological culture medium and a tissue processing procedure. In order to facilitate the release...
Incubating rainbow trout in soft water increased their later sensitivity to cadmium and zinc
Christopher A. Mebane, Daniel P. Hennessy, Frank S. Dillon
2010, Water, Air, & Soil Pollution (205) 245-250
Water hardness is well known to affect the toxicity of some metals; however, reports on the influence of hardness during incubation or acclimation on later toxicity to metals have been conflicting. We incubated rainbow trout (Oncorhynchus mykiss) near the confluence of two streams, one with soft water and...
The spatial and temporal variability of groundwater recharge in a forested basin in northern Wisconsin
W. R. Dripps, K. R. Bradbury
2010, Hydrological Processes (24) 383-392
Recharge varies spatially and temporally as it depends on a wide variety of factors (e.g. vegetation, precipitation, climate, topography, geology, and soil type), making it one of the most difficult, complex, and uncertain hydrologic parameters to quantify. Despite its inherent variability, groundwater modellers, planners, and policy makers often ignore recharge...
Designing and implementing a regional urban modeling system using the SLEUTH cellular urban model
Claire A. Jantz, Scott J. Goetz, David I. Donato, Peter R. Claggett
2010, Computers, Environment and Urban Systems (34) 1-16
This paper presents a fine-scale (30 meter resolution) regional land cover modeling system, based on the SLEUTH cellular automata model, that was developed for a 257000 km2 area comprising the Chesapeake Bay drainage basin in the eastern United States. As part of this effort, we developed a new version of the SLEUTH...
HiRISE observations of gas sublimation-driven activity in Mars' southern polar regions: III. Models of processes involving translucent ice
Ganna Portyankina, Wojciech J. Markiewicz, Nicolas Thomas, Candice J. Hansen, Moses P. Milazzo
2010, Icarus (205) 311-320
Enigmatic surface features, known as 'spiders', found at high southern martian latitudes, are probably caused by sublimation-driven erosion under the seasonal carbon dioxide ice cap. The Mars Reconnaissance Orbiter (MRO) High Resolution Imaging Science Experiment (HiRISE) has imaged this terrain in unprecedented details throughout southern spring. It has been postulated...
Yearling greater sage-grouse response to energy development in Wyoming
M.J. Holloran, R.C. Kaiser, W.A. Hubert
2010, Journal of Wildlife Management (74) 65-72
Sagebrush (Artemisia spp.)-dominated habitats in the western United States have experienced extensive, rapid changes due to development of natural-gas fields, resulting in localized declines of greater sage-grouse (Centrocercus urophasianus) populations. It is unclear whether population declines in natural-gas fields are caused by avoidance or demographic impacts, or the age classes...
