Mission Areas

Ecosystems

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Filter Total Items: 594
Date published: March 10, 2008

Conservation Research on North American Freshwater Faunas

The decline of freshwater animals has resulted in an increase in the number of imperiled species and extinctions. USGS scientists use genetics to determine if these species truly are gone forever.

Contacts: Noel Burkhead
Date published: October 14, 2003

Gulf sturgeon Fact Sheet

Gulf sturgeon Fact Sheet

Microbiology

Research in fish and wildlife health and disease, geomicrobiology, ecosystem function, climate change, water quality for drinking and in recreation, bioremediation, nanotechnology, energy and geographic patterns of microbial distribution.

Attribution: Ecosystems

National Phenology Network

Brings together citizen scientists, government agencies, non-profit groups, educators and students of all ages to monitor the impacts of climate change on plants and animals in the United States.

Attribution: Ecosystems

Science and Decisions Center

This center is an interdisciplinary organization advancing the use of science in natural resource decision making. The Center focuses on research and applications in three science areas: decision science (adaptive management and structured decision making), ecosystem services, and resilience/sustainability.

Attribution: Ecosystems

International

We help our scientists partner with governments, NGOs, universities, and individuals in other countries to conduct research that benefits the partner country and the United States. These partnerships can enhance the science and improve diplomatic relationships (science diplomacy), a less tangible but equally important benefit.

Attribution: Ecosystems
Filter Total Items: 2,305
Year Published: 2014

Phenological adjustment in arctic bird species: relative importance of snow melt and ecological factors

Previous studies have documented advancement in clutch initiation dates (CIDs) in response to climate change, most notably for temperate-breeding passerines. Despite accelerated climate change in the Arctic, few studies have examined nest phenology shifts in arctic breeding species. We investigated whether CIDs have advanced for the most abundant...

Liebezeit, Joseph R.; Gurney, K. E. B.; Budde, Michael E.; Zack, Steve; Ward, David H.
Liebezeit, J. R., K. E. B. Gurney, M. Budde, S. Zack, and D. H. Ward. 2014. Phenological adjustment in arctic bird species: relative importance of snow melt and ecological factors. Polar Biology 37(9):1309-1320. doi:10.1007/s00300-014-1522-x

Year Published: 2014

Changes in Mauna Kea Dry Forest Structure 2000-2014

Changes in the structure of the subalpine vegetation of Palila Critical Habitat on the southwestern slope of Mauna Kea Volcano, Hawai‘i, were analyzed using 12 metrics of change in māmane (Sophora chrysophylla) and naio (Myoporum sandwicense) trees surveyed on plots in 2000 and 2014. These two dominant species were analyzed separately, and...

Banko, Paul C.; Brinck, Kevin W.
Brinck, K. W. and P.C. Banko. 2014. Changes in Mauna Kea Dry Forest Structure 2000-2014. Hawaii Cooperative Studies Unit Technical Report. TR HCSU-0054. University of Hawaii at Hilo, 20 pp.

Year Published: 2014

Factors related to northern goshawk landscape use in the western Great Lakes region

Northern Goshawks (Accipiter gentilis) are a species of special conservation concern in the western Great Lakes bioregion and elsewhere in North America, and exhibit landscape-scale spatial use patterns. However, little information exists about Northern Goshawk habitat relations at broad spatial extents, as most existing published information...

Bruggeman, Jason E.; Andersen, David E.; Woodford, James E.

Year Published: 2014

Survival of surf scoters and white-winged scoters during remigial molt

Quantifying sources and timing of variation in demographic rates is necessary to determine where and when constraints may exist within the annual cycle of organisms. Surf scoters (Melanitta perspicillata) and white-winged scoters (M. fusca) undergo simultaneous remigial molt during which they are flightless for >1 month. Molt could result in...

Uher-Koch, Brian D.; Esler, Daniel N.; Dickson, Rian D.; Hupp, Jerry W.; Evenson, Joseph R.; Anderson, Eric M.; Barrett, Jennifer; Schmutz, Joel A.
Uher-Koch, B. D., D. Esler, R. D. Dickson, J. W. Hupp, J. R. Evenson, E. M. Anderson, J. Barrett, and J. A. Schmutz. 2014. Survival of Surf Scoters and White-Winged Scoters during remigial molt. Journal of Wildlife Management 78(7):1189-1196. doi:10.1002/jwmg.774

Year Published: 2014

Using resistance and resilience concepts to reduce impacts of annual grasses and altered fire regimes on the sagebrush ecosystem and sage-grouse- A strategic multi-scale approach

This Report provides a strategic approach for conservation of sagebrush ecosystems and Greater Sage- Grouse (sage-grouse) that focuses specifically on habitat threats caused by invasive annual grasses and altered fire regimes. It uses information on factors that influence (1) sagebrush ecosystem resilience to disturbance and resistance to invasive...

Chambers, Jeanne C.; Pyke, David A.; Maestas, Jeremy D.; Boyd, Chad S.; Campbell, Steve; Espinosa, Shawn; Havlina, Doug; Mayer, Kenneth F.; Wuenschel, Amarina

Year Published: 2014

A nuclear DNA perspective on delineating evolutionarily significant lineages in polyploids: the case of the endangered shortnose sturgeon (Acipenser brevirostrum)

The shortnose sturgeon, Acipenser brevirostrum, oft considered a phylogenetic relic, is listed as an “endangered species threatened with extinction” in the US and “Vulnerable” on the IUCN Red List. Effective conservation of A. brevirostrum depends on understanding its diversity and evolutionary processes, yet challenges associated with the...

King, Timothy L.; Henderson, Anne P.; Kynard, Boyd E.; Kieffer, Micah C.; Peterson, Douglas L.; Aunins, Aaron W.; Brown, Bonnie L.
A nuclear DNA perspective on delineating evolutionarily significant lineages in polyploids: the case of the endangered shortnose sturgeon (Acipenser brevirostrum); 2014; Article; Journal; PLoS ONE; King, Timothy L.; Henderson, Anne P.; Kynard, Boyd E.; Kieffer, Micah C.; Peterson, Douglas L; Aunins, Aaron W.; Brown, Bonnie L.

Year Published: 2014

Can air temperature be used to project influences of climate change on stream temperature?

Worldwide, lack of data on stream temperature has motivated the use of regression-based statistical models to predict stream temperatures based on more widely available data on air temperatures. Such models have been widely applied to project responses of stream temperatures under climate change, but the performance of these models has not been...

Arismendi, Ivan; Safeeq, Mohammad; Dunham, Jason B.; Johnson, Sherri L.
Can air temperature be used to project influences of climate change on stream temperature?; 2014; Article; Journal; Environmental Research Letters; Arismendi, Ivan; Safeeq, Mohammad; Dunham, Jason B.; Johnson, Sherri L.

Year Published: 2014

Resource manager information needs regarding hydrologic regime shifts for the North Pacific Landscape Conservation

Landscape Conservation Cooperatives (LCCs) are a network of 22 public-private partnerships, defined by ecoregion, that share and provide science to ensure the sustainability of land, water, wildlife, and cultural resources in North America. LCCs were established by the U.S. Department of the Interior (DOI) in recognition of the fact that response...

Woodward, Andrea; Jenni, Karen
Resource manager information needs regarding hydrologic regime shifts for the North Pacific Landscape Conservation; 2014; OFR; 2014-1178; Woodward, Andrea; Jenni, Karen

Year Published: 2014

Calcium oxalate contribution to calcium cycling in forests of contrasting nutrient status

Calcium oxalate (Ca oxalate) is an insoluble biomineral that forms in plants and fungi, and occurs in soils across many types of ecosystems. Assessing how Ca oxalate may shape ecosystem Ca cycling requires information on the distribution of Ca oxalate among plant biomass, detritus, and mineral soil, and how it varies with ecosystem Ca status. We...

Dauer, Jenny M.; Perakis, Steven S.
Calcium oxalate contribution to calcium cycling in forests of contrasting nutrient status; 2014; Article; Journal; Forest Ecology and Management; Dauer, Jenny M.; Perakis, Steven S.

Year Published: 2014

Post-independence fledgling ecology in a migratory songbird: Implications for breeding-grounds conservation

For migratory songbirds, breeding-grounds conservation and management plans are generally focused on habitat associated with locations of singing males and sometimes nesting females. However, habitat structure is often different in areas used for raising fledglings compared with areas used for song territories, and very little is known about...

Streby, H.M.; Peterson, S.M.; Kramer, G.R.; Anderson, D.E.

Year Published: 2014

Wetland management and rice farming strategies to decrease methylmercury bioaccumulation and loads from the Cosumnes River Preserve, California

We evaluated mercury (Hg) concentrations in caged fish (deployed for 30 days) and water from agricultural wetland (rice fields), managed wetland, slough, and river habitats in the Cosumnes River Preserve, California. We also implemented experimental hydrological regimes on managed wetlands and post-harvest rice straw management techniques on rice...

Eagles-Smith, Collin A.; Ackerman, Joshua T.; Fleck, Jacob; Windham-Myers, Lisamarie; McQuillen, Harry; Heim, Wes
Wetland management and rice farming strategies to decrease methylmercury bioaccumulation and loads from the Cosumnes River Preserve, California; 2014; OFR; 2014-1172; Eagles-Smith, Collin A.; Ackerman, Josh T.; Fleck, Jacob; Windham-Myers, Lisamarie; McQuillen, Harry; Heim, Wes

Year Published: 2014

Environmental and physiological influences to isotopic ratios of N and protein status in a montane ungulate in winter

Winter severity can influence large herbivore populations through a reduction in maternal proteins available for reproduction. Nitrogen (N) isotopes in blood fractions can be used to track the use of body proteins in northern and montane ungulates. We studied 113 adult female caribou for 13 years throughout a series of severe winters that reduced...

Gustine, David D.; Barboza, Perry S.; Adams, Layne G.; Wolf, Nathan B.
Environmental and physiological influences to isotopic ratios of N and protein status in a montane ungulate in winter; 2014; Article; Journal; PLoS One; Gustine, David D.; Barboza, Perry S.; Adams, Layne G.; Wolf, Nathan B.