Ecosystems

Publications

Filter Total Items: 31,321
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Year Published: 2019

Anticoagulant rodenticides in Strix owls indicate widespread exposure in west coast forests

Exposure of nontarget wildlife to anticoagulant rodenticides (AR) is a global conservation concern typically centered around urban or agricultural areas. Recently, however, the illegal use of ARs in remote forests of California, USA, has exposed sensitive predators, including the federally threatened northern spotted owl (Strix occidentalis...

Wiens, David; Dilione, Krista E.; Eagles-Smith, Collin A.; Herring, Garth; Lesmeister, Damon B.; Gabriel, Mourad W.; Wengert, Greta; Simon, David C.

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Year Published: 2019

Reporting the limits of detection and quantification for environmental DNA assays

BackgroundEnvironmental DNA (eDNA) analysis is increasingly being used to detect the presence and relative abundance of rare species, especially invasive or imperiled aquatic species. The rapid progress in the eDNA field has resulted in numerous studies impacting conservation and management actions. However, standardization of eDNA methods and...

Klymus, Katy E.; Merkes, Christopher M.; Allison, Michael J.; Goldberg, Caren S.; Helbing, Caren C.; Hunter, Margaret; Jackson, Craig; Lance, Richard F.; Mangan, Anna M.; Monroe, Emy M.; Piaggio, Antoinette J.; Stokdyk, Joel P.; Wilson, Chris C.; Richter, Catherine A.

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Year Published: 2019

Putative mitochondrial sex determination in the Bivalvia: insights from a hybrid transcriptome assembly in freshwater mussels

Bivalves exhibit an astonishing diversity of sexual systems, with genetic and environmental determinants of sex, and possibly the only example of mitochondrial genes influencing sex determination pathways in animals. In contrast to all other animal species in which strict maternal inheritance (SMI) of mitochondria is the rule, bivalves possess a...

Capt, Charlotte; Renaut, Sebastien; Stewart, Donald; Johnson, Nathan; Breton, Sophie

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Year Published: 2019

Photosynthetic and respiratory responses of two bog shrub species to whole ecosystem warming and elevated CO2 at the boreal-temperate ecotone

Peatlands within the boreal-temperate ecotone contain the majority of terrestrial carbon in this region, and there is concern over the fate of such carbon stores in the face of global environmental changes. The Spruce and Peatland Response Under Changing Environments (SPRUCE) facility aims to advance the understanding of how such peatlands may...

Ward, Eric; Warren, Jeffrey M .; McLennan, David A; Dusenge, Mirindi E; Way, Danielle A.; Wullschleger, Stan D.; Hanson, Paul J

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Year Published: 2019

Quantifying spirorchiid eggs in splenic histological samples from green turtles

The present study proposes a new methodology for the quantification of parasite eggs in animal tissue. Quantification of parasites are important to understand epidemiology of spirorchiid infections in sea turtles, however different methodologies for quantifying Spirorchiidae eggs in turtle tissues have been used. The most representative way to...

Felipe D'Azeredo; Meira-Filho, Meira; Work, Thierry M.

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Year Published: 2019

Drought-mediated extinction of an arid-land amphibian: Insights from a spatially explicit dynamic occupancy model

Understanding how natural and anthropogenic processes affect population dynamics of species with patchy distributions is critical to predicting their responses to environmental changes. Despite considerable evidence that demographic rates and dispersal patterns vary temporally in response to an array of biotic and abiotic processes, few...

Muths, Erin L.; Zylstra, Erin R; Swann, Don E; Hossack, Blake R.; Steidl, Robert J

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Year Published: 2019

Giant sequoias: Drama on a grand scale

No abstract available.

Stephenson, Nathan L.
Stephenson, N. 2019. . Pages 47-49 in R. Hirsch, The Nature of Yosemite: A Visual Journey. Yosemite Association, Yosemite National Park, California. [Fine arts photography book with educational text.]

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Year Published: 2019

Factors affecting post-release survival of coded-wire tagged Lake Trout Salvelinus namaycush in Lake Michigan at four historical spawning locations

Since the 1950s, fishery agencies on Lake Michigan have pursued Lake Trout Salvelinus namaycush rehabilitation through Sea Lamprey Petromyzon marinus control, harvest regulations, and by stocking millions of fish annually. Stocking was prioritized at four historically important spawning locations beginning in 1985, and coded wire tags (CWTs) were...

Kornis, Matthew S.; Bronte, Charles R.; Holey, Mark E.; Hanson, S. Dale; Treska, Theodore J.; Jonas, Jory L.; Madenjian, Charles P.; Claramunt, Randall M.; Robillard, Steven R.; Breidert, Brian; Donner, Kevin C.; Lenart, Stephen J.; Martell, Archie W.; McKee, Patrick C.; Olson, Erik J.

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Year Published: 2019

Influenza A virus detected in native bivalves in waterfowl habitat of the Delmarva Peninsula, USA

We evaluated the prevalence of influenza A virus (IAV) in different species of bivalves inhabiting natural water bodies in waterfowl habitat along the Delmarva Peninsula and Chesapeake Bay in eastern Maryland. Bivalve tissue from clam and mussel specimens (Macoma balthica, Macoma phenax, Mulinia sp., Rangia cuneata, ...

Densmore, Christine L.; Iwanowicz, Deborah D.; McLaughlin, Shawn M.; Ottinger, Christopher A.; Spires, Jason E.; Iwanowicz, Luke R.

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Year Published: 2019

Effects of water temperature, turbidity, and rainbow trout on humpback chub population dynamics

Humpback chub (Gila cypha Miller 1946), found only in the Colorado River Basin, was one of the first species to be given full protection under the Endangered Species Act of 1973. Habitat alterations, such as changes in flow and water temperature caused by dams, and the introduction of nonnative fish have contributed to population declines in...

Frederick, Phil; Yackulic, Charles; Hull, Julia B.
Yackulic, C.B., and Hull, J.B., 2019, Effects of water temperature, turbidity, and rainbow trout on humpback chub population dynamics: U.S. Geological Survey Fact Sheet 2019–3049, 4 p., https://doi.org/10.3133/fs20193049.

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Year Published: 2019

The effects of management practices on grassland birds—American Bittern (Botaurus lentiginosus)

Keys to American Bittern (Botaurus lentiginosus) management include protecting wetlands and adjacent uplands and maintaining idle upland habitat. American Bitterns have been reported to use habitats with 30–203 centimeters (cm) average vegetation height, 44–99 cm visual obstruction reading, and less than 91 cm water depth. 

Shaffer, Jill A.; Igl, Lawrence D.; Johnson, Douglas H.; Sondreal, Marriah L.; Goldade, Christopher M.; Zimmerman, Amy L.; Wooten, Travis L.; Euliss, Betty R.
Shaffer, J.A., Igl, L.D., Johnson, D.H., Sondreal, M.L., Goldade, C.M., Zimmerman, A.L., Wooten, T.L., and Euliss, B.R., 2019, The effects of management practices on grassland birds—American Bittern (Botaurus lentiginosus), chap. K of Johnson, D.H., Igl, L.D., Shaffer, J.A., and DeLong, J.P., eds., The effects of management practices on grassland birds: U.S. Geological Survey Professional Paper 1842, 8 p., https://doi.org/10.3133/pp1842K.

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Year Published: 2019

The effects of management practices on grassland birds—Long-billed Curlew (Numenius americanus)

Keys to Long-billed Curlew (Numenius americanus) management include providing large, open, level to gently rolling grasslands with short vegetation, and tailoring grazing regimes to local conditions. Long-billed Curlews have been reported to use habitats with 3–75 centimeters (cm) average vegetation height, less than or equal to 27 cm visual...

Shaffer, Jill A.; Igl, Lawrence D.; Johnson, Douglas H.; Sondreal, Marriah L.; Goldade, Christopher M.; Rabie, Paul A.; Euliss, Betty R.
Shaffer, J.A., Igl, L.D., Johnson, D.H., Sondreal, M.L., Goldade, C.M., Rabie, P.A., and Euliss, B.R., 2019, The effects of management practices on grassland birds—Long-billed Curlew (Numenius americanus), chap. G of Johnson, D.H., Igl, L.D., Shaffer, J.A., and DeLong, J.P., eds., The effects of management practices on grassland birds: U.S. Geological Survey Professional Paper 1842, 12 p., https://doi.org/10.3133/pp1842G.