Oryx callotis (Artiodactyla: Bovidae)
Dana N. Lee, Richard W. Dolman, David M. Leslie Jr.
2013, Mammalian Species (45)
Oryx callotis O. Thomas, 1982 (fringe-eared oryx) is a relatively large, long-bodied bovid, with an appropriate common name because of its distinguishing tufts of hair extending from the ends of the ears. It occupies arid lands in Kenya and Tanzania. O. callotis can go up to a month without drinking water if succulent...
Landsat imagery reveals declining clarity of Maine’s lakes during 1995-2010
Ian M. McCullough, Cynthia S. Loftin, Steven A. Sader
2013, Freshwater Science (32) 741-752
Water clarity is a strong indicator of regional water quality. Unlike other common water-quality metrics, such as chlorophyll a, total P, or trophic status, clarity can be accurately and efficiently estimated remotely on a regional scale. Satellite-based remote sensing is useful in regions with many lakes where traditional field-sampling techniques may...
Shifts in controls on the temporal coherence of throughfall chemical flux in Acadia National Park, Maine, USA
Sarah J. Nelson, Katherine E. Webster, Cynthia S. Loftin, Kathleen C. Weathers
2013, Biogeochemistry (116) 147-160
Major ion and mercury (Hg) inputs to terrestrial ecosystems include both wet and dry deposition (total deposition). Estimating total deposition to sensitive receptor sites is hampered by limited information regarding its spatial heterogeneity and seasonality. We used measurements of throughfall flux, which includes atmospheric inputs to forests and the net...
Habitat, wildlife and one health: Arcanobacterium pyogenes in Maryland and Upper Eastern Shore white-tailed deer populations
Melissa M. Turner, Christopher S. DePerno, Mark C. Conner, T. Brian Eyler, Richard A. Lancia, Robert W. Klaver, Michael K. Stoskopf
2013, Infection Ecology and Epidemiology (3)
Background: Understanding the distribution of disease in wildlife is key to predicting the impact of emerging zoonotic one health concerns, especially for wildlife species with extensive human and livestock interfaces. The widespread distribution and complex interactions of white-tailed deer (Odocoileus virginianus) with humans suggest deer population health and management may...
Connectedness of land use, nutrients, primary production, and fish assemblages in oxbow lakes
Leandro E. Miranda, Caroline S. Andrews, Robert Kroger
2013, Aquatic Sciences (76) 41-50
We explored the strength of connectedness among hierarchical system components associated with oxbow lakes in the alluvial valley of the Lower Mississippi River. Specifically, we examined the degree of canonical correlation between land use (agriculture and forests), lake morphometry (depth and size), nutrients (total nitrogen and total phosphorus), primary production...
Nesting habitat and productivity of Swainson's Hawks in southeastern Arizona
Catherine Nishida, Clint W. Boal, Stephen DeStefano, Royden J. Hobbs
2013, Journal of Raptor Research (47) 377-384
We studied Swainson's Hawks (Buteo swainsoni) in southeastern Arizona to assess the status of the local breeding population. Nest success (≥1 young fledged) was 44.4% in 1999 with an average of 1.43 ± 0.09 (SE) young produced per successful pair. Productivity was similar in 2000, with 58.2% nesting success and...
Hydraulically controlled discrete sampling from open boreholes
Philip T. Harte
2013, Groundwater (51) 822-827
Groundwater sampling from open boreholes in fractured-rock aquifers is particularly challenging because of mixing and dilution of fluid within the borehole from multiple fractures. This note presents an alternative to traditional sampling in open boreholes with packer assemblies. The alternative system called ZONFLO (zonal flow) is based on hydraulic control...
Phelsuma grandis (Madagascar day gecko)
Kenneth L. Krysko, James G. Duquesnel, Robert N. Reed
2013, Herpetological Review (44) 626-626
No abstract available....
Accuracy of stream habitat interpolations across spatial scales
Kenneth R. Sheehan, Stuart A. Welsh
2013, Journal of Geographic Information System (5) 606-612
Stream habitat data are often collected across spatial scales because relationships among habitat, species occurrence, and management plans are linked at multiple spatial scales. Unfortunately, scale is often a factor limiting insight gained from spatial analysis of stream habitat data. Considerable cost is often expended to collect data at several...
A Common Loon incubates rocks as surrogates for eggs
Stephen DeStefano, Kiana K. G. Koenen, Jillian W. Pereira
2013, Northeastern Naturalist (20) 143-147
A nesting Gavia immer (Common Loon) was discovered incubating 2 rocks on a floating nest platform on the Quabbin reservoir in central Massachusetts for 43 days, well beyond the typical period of 28 days, before we moved in to investigate. The rocks were likely unearthed in the soil and vegetation used on...
Identification and specialization as a waterfowl hunter
Susan A. Schroeder, David C. Fulton, Jeffrey S. Lawrence, Steven D. Cordts
2013, Leisure Science (35) 218-234
Like specialization, identity offers a way for differentiating and understanding recreationists and for gaining insight into the question of participant progression in an activity. We examined how identity related to measures of specialization among lapsed and current waterfowl hunters. Lapsed hunters included those who had purchased a Minnesota waterfowl stamp...
Evaluating spatial overlap and relatedness of white-tailed deer in a chronic wasting disease management zone
Michael D. Samuel, Seth B. Magle, Timothy R. Van Deelen, Stacie J. Robinson, Nancy E. Mathews
2013, PLoS ONE (8)
Wildlife disease transmission, at a local scale, can occur from interactions between infected and susceptible conspecifics or from a contaminated environment. Thus, the degree of spatial overlap and rate of contact among deer is likely to impact both direct and indirect transmission of infectious diseases such chronic wasting disease (CWD)...
Larval gizzard shad characteristics in Lake Oahe, South Dakota: A species at the northern edge of its range
Mark J. Fincel, Steven R. Chipps, Brian D. S. Graeb, Kris R. Edwards
2013, Journal of Freshwater Ecology (28) 17-26
Gizzard shad, Dorosoma cepedianum, have generally been restricted to the lower Missouri River impoundments in South Dakota. In recent years, gizzard shad numbers have increased in Lake Oahe, marking the northern-most natural population. These increases could potentially affect recreational fishes. Specifically, questions arise about larval gizzard shad growth dynamics and if age-0...
Niche overlap, threshold food densities, and limits to prey depletion for a diving duck assemblage in an estuarine bay
James R. Lovvorn, Susan De La Cruz, John Y. Takekawa, Laura E. Shaskey, Samantha E. Richman
2013, Marine Ecology Progress Series (476) 251-268
Planning for marine conservation often requires estimates of the amount of habitat needed to support assemblages of interacting species. During winter in subtidal San Pablo Bay, California, the 3 main diving duck species are lesser scaup Aythya affinis (LESC), greater scaup A. marila (GRSC), and surf scoter Melanitta perspicillata (SUSC), which all feed almost entirely on...
Storm surges and climate change implications for tidal marshes: Insight from the San Francisco Bay Estuary, California, USA
Karen M. Thorne, Kevin J. Buffington, Kathleen Swanson, John Y. Takekawa
2013, International Journal of Climate Change: Impacts and Responses (4) 169-190
Tidal marshes are dynamic ecosystems, which are influenced by oceanic and freshwater processes and daily changes in sea level. Projected sea-level rise and changes in storm frequency and intensity will affect tidal marshes by altering suspended sediment supply, plant communities, and the inundation duration and depth of the marsh platform....
Body and diet composition of sympatric black and grizzly bears in the Greater Yellowstone Ecosystem
Charles C. Schwartz, Jennifer K. Fortin, Justin E. Teisberg, Mark A. Haroldson, Christopher Servheen, Charles T. Robbins, Frank T. van Manen
2013, Journal of Wildlife Management (78) 68-78
The Greater Yellowstone Ecosystem (GYE) has experienced changes in the distribution and availability of grizzly bear (Ursus arctos) food resources in recent decades. The decline of ungulates, fish, and whitebark pine seeds (Pinus albicaulis) has prompted questions regarding their ability to adapt. We examined body composition and diet of grizzly...
Quantitative and qualitative approaches to identifying migration chronology in a continental migrant
William S. Beatty, Dylan C. Kesler, Elisabeth B. Webb, Andrew H. Raedeke, Luke W. Naylor, Dale D. Humburg
2013, PLoS ONE 1-9
The degree to which extrinsic factors influence migration chronology in North American waterfowl has not been quantified, particularly for dabbling ducks. Previous studies have examined waterfowl migration using various methods, however, quantitative approaches to define avian migration chronology over broad spatio-temporal scales are limited, and the implications for using different...
A non-marine source of variability in Adélie Penguin demography
William R. Fraser, Donna L. Patterson-Fraser, Christine Ribic, Oscar Schofield, Hugh Ducklow
2013, Oceanography (26) 207-209
A primary research objective of the Palmer Long Term Ecological Research (LTER) program has been to identify and understand the factors that regulate the demography of Adélie penguins (Pygoscelis adeliae). In this context, our work has been focused on variability in the marine environment on which this species depends for...
Bacterial etiology in diseased fishes, primarily smallmouth bass Micropterus dolomieu, within the Chesapeake Bay drainage in 2009-2011
Clifford E. Starliper, Vicki Blazer, Luke R. Iwanowicz, Heather L. Walsh
2013, Proceedings of the West Virginia Academy of Science (85) 18-32
No abstract available....
Movements, cover-type selection, and survival of fledgling Ovenbirds in managed deciduous and mixed coniferous-deciduous forests
Henry M. Streby, David E. Andersen
2013, Forest Ecology and Management (287) 9-16
We used radio telemetry to monitor movements, cover-type selection, and survival for fledglings of the mature-forest nesting Ovenbird (Seiurus aurocapilla) at two managed forest sites in north-central Minnesota. Both sites contained forested wetlands, regenerating clearcut stands of various ages, and logging roads, but differed in mature forest composition; one deciduous...
Fifty years after Welles and Welles: Distribution and genetic structure of Desert Bighorn Sheep in Death Valley National Park
Clinton W. Epps, John D. Wehausen, William B. Sloan, Stacy Holt, Tyler G. Creech, Rachel S. Crowhurst, Jef R. Jaeger, Kathleen M. Longshore, Ryan J. Monello
2013, Conference Paper, 1st Death Valley Natural History Conference Proceedings
The status of desert bighorn sheep (Ovis canadensis nelsoni) populations in the mountains around Death Valley was first evaluated in 1938, shortly after designation of Death Valley National Monument. However, the most comprehensive evaluation of bighorn sheep in the region was conducted by Ralph and Florence Welles during 1955-1961. They...
First report of fasciation in Pitcher's Thistle, Cirsium pitcheri (Asteraceae)
Noel B. Pavlovic, Megan K Korte, Kathryn McEachern, Ralph Grundel
2013, The Michigan Botanist (52) 58-66
We document the first reported occurrence of fasciation in the federally threatened Pitcher’s thistle, Cirsium pitcheri (Asteraceae). In 2013, we discovered two adult plants of Pitcher’s thistle out of a total of 176 plants at West Beach, near Miller, Indiana, USA, that exhibited both normal and fasciated growth. Unlike plants...
Factors related to occurrence and distribution of selected bacterial and protozoan pathogens in Pennsylvania streams
Joseph W. Duris, Andrew G. Reif, Donna A. Crouse, Natasha M. Isaacs
2013, Water Research (47) 300-314
The occurrence and distribution of fecal indicator bacteria (FIB) and bacterial and protozoan pathogens are controlled by diverse factors. To investigate these factors in Pennsylvania streams, 217 samples were collected quarterly from a 27-station water-quality monitoring network from July 2007 through August 2009. Samples were analyzed for concentrations of Escherichia coli (EC)...
Hysteresis of unsaturated hydromechanical properties of a silty soil
Ning Lu, Murat Kaya, Brian D. Collins, Jonathan W. Godt
2013, Journal of Geotechnical and Geoenvironmental Engineering (139) 507-510
Laboratory tests to examine hysteresis in the hydrologic and mechanical properties of partially saturated soils were conducted on six intact specimens collected from a landslide-prone area of Alameda County, California. The results reveal that the pore-size distribution parameter remains statistically unchanged between the wetting and drying paths; however, the wetting...
Impact of valley fills on streamside salamanders in southern West Virginia
Petra Bohall Wood, Jennifer M. Williams
2013, Journal of Herpetology (47) 119-125
Valley fills associated with mountaintop-removal mining bury stream headwaters and affect water quality and ecological function of reaches below fills. We quantified relative abundance of streamside salamanders in southern West Virginia during 2002 in three streams below valley fills (VFS) and in three reference streams (RS). We surveyed 36 10-...
