Mission Areas

Ecosystems

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Filter Total Items: 556
Date published: September 15, 2014
Status: Active

Technical Support and Synthesis of Data Collected on the Health and Status of Delta Smelt

USGS scientists work to provide data to UC Davis researchers on health and growth of smelt population in Bay-Delta.

Date published: August 1, 2014
Status: Active

Rearing Habitats of Longfin Smelt in the Low Salinity Zone of the San Francisco Estuary

Scientists study habitats occupied by longfin smelt larvae to better understand their ecology and to inform water management operations, species management, and habitat restoration efforts.

Date published: May 6, 2014

Adaptive Management for the Northern Bobwhite on the Babcock-Webb Wildlife Management Area

Based on field research conducted during 2002-2009, the bobwhite population on the Babcock-Webb Wildlife Management Area (WMA) in Southwest Florida is incapable of supporting desired levels of sport harvest.

Date published: April 17, 2014

Use of Amphibian Communities as Indicators of Restoration Success in the Greater Everglades

Habitat alteration and climate, when combined, are serious threats to amphibians and other wildlife. Habitat suitability models are being used to predict the responses of an amphibian community to hydrological and habitat restoration in the Greater Everglades Ecosystem. 

Date published: April 1, 2014

Assessment of South Atlantic Landscape Conservation Cooperative (SALCC) Marine Indicators

The South Atlantic Landscape Conservation Cooperative (SALCC) has proposed natural resource indicators and associated targets for the marine ecosystem.

Contacts: Michael Randall
Date published: April 1, 2014
Status: Active

Abiotic and Biotic Effects on Delta Smelt Abundance and Distribution

Scientists research the importance of abiotic versus biotic (food supply) habitat features as drivers of delta smelt abundance and distribution.

Date published: April 17, 2013

Coping with Invasive Alien Species and Environmental Stressors: Linking Behavioral Studies with Management for Anuran Amphibians

Climate change and invasive species are two key drivers of biodiversity loss. Knowing how amphibians respond to climate change and invasive species can greatly improve predictions of species' persistence in the face of these factors and can help guide resource managers and conservation biologists in developing strategies to manage for these encroaching disturbances. 

Date published: April 18, 2012
Status: Completed

Experimental Study of Fire Season and Frequency in South Florida Pinelands

Fire is a major driving force in determining the structure and composition of subtropical vegetation. Prescribed fire constitutes one of the most pervasive management actions influencing the restoration and maintenance of the Greater Everglades Ecosystem. 

Contacts: James Snyder
Date published: March 10, 2012

Systematic Studies of Southeastern Fishes

The southeastern United States is home to a variety of freshwater snails, mussels, crayfish, and fishes. USGS scientists are conducting systematic studies to better document the region's biodiversity.

Contacts: Noel Burkhead
Date published: April 17, 2009

Integrative Studies of Florida Spring Ecosystems

Florida's springs are a source of cultural, recreational, and ecological importance. But land-use changes and increased demands for groundwater due to the state's growing population have led to widespread impairment of these unique ecosystems. 

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

Filter Total Items: 2,278
Year Published: 2014

Energy demands for maintenance, growth, pregnancy, and lactation of female Pacific walruses (Odobenus rosmarus divergens)

Decreases in sea ice have altered habitat use and activity patterns of female Pacific walruses Odobenus rosmarus divergens and could affect their energetic demands, reproductive success, and population status. However, a lack of physiological data from walruses has hampered efforts to develop the bioenergetics models required for fully...

Noren, Shawn R.; Udevitz, Mark S.; Jay, Chadwick V.
Noren, S. R., M . S. Udevitz, and C. V. Jay. 2014. Energy Demands for maintenance, growth, pregnancy, and lactation of female Pacific walruses (Odobenus rosmarus divergens). Physiological and Biochemical Zoology 87(6):837-854.

Year Published: 2014

Evaluating the long-term management of introduced ungulates to protect the palila, an endangered bird, and its criticial habitat in subalpine forest of Mauna Kea, Hawai'i

Under the multiple-use paradigm, conflicts may arise when protection of an endangered species must compete with other management objectives. To resolve such a conflict in the Critical Habitat of the endangered Hawaiian honeycreeper, palila (Loxioides bailleui), federal courts ordered the eradication of introduced ungulates responsible for damaging...

Banko, Paul C.; Hess, Steven C.; Scowcroft, Paul G.; Farmer, Chris; Jacobi, James D.; Stephens, Robert M.; Camp, Richard J.; Leonard, David L.; Brinck, Kevin W.; Juvik, J.O.; Juvik, S. P.
Banko, P.C., S.C. Hess, P.G. Scowcroft, C. Farmer, J.D. Jacobi, R.M. Stephens, R.J. Camp, D.L. Leonard Jr, K.W. Brinck, J.O. Juvik, and S.P. Juvik. Evaluating the Long-Term Management of Introduced Ungulates to Protect the Palila, an Endangered Bird, and Its Critical Habitat in Subalpine Forest of Mauna Kea, Hawai‘i. Journal of Arctic, Antarctic, and Alpine Research, 46 :871-889

Year Published: 2014

Productivity of forest birds at Hakalau Forest NWR

Hawai‘i has some of the most endangered avian species in the world, which face numerous threats from habitat loss, disease, climate change, and introduced species. This report details the results of a two-year productivity study of all forest bird species at Hakalau National Wildlife Refuge, Hawai‘i Island. We found and monitored nests...

Paxton, Eben H.; Cummins, George C; Kendall, Steven J.
Cummins, G.C., S.J. Kendall, and E.H. Paxton. 2014. Productivity of forest birds at Hakalau Forest NWR. Hawaii Cooperative Studies Unit Technical Report. TR HCSU-0056, 24 pp.

Year Published: 2014

The spring migration of adult North American Ospreys

Most North American Ospreys (Pandion haliaetus) are migratory, breeding in northern latitudes and migrating long distances to and from their wintering grounds in the tropics. Although fall migration patterns of North American Ospreys have been described and studied, very little has been published about the spring migration of these birds. We used...

Martell, Mark S.; Bierregaard, Richard O.; Washburn, Brian E.; Elliott, John E.; Henny, Charles J.; Kennedy, Robert S.; MacLeod, Iain

Year Published: 2014

Changing Arctic ecosystems: resilience of caribou to climatic shifts in the Arctic

The U.S. Geological Survey (USGS) Changing Arctic Ecosystems (CAE) initiative strives to inform key resource management decisions for Arctic Alaska by providing scientific information and forecasts for current and future ecosystem response to a warming climate. Over the past 5 years, a focal area for the USGS CAE initiative has been the North...

Gustine, David D.; Adams, Layne G.; Whalen, Mary E.; Pearce, John M.
Changing Arctic ecosystems: resilience of caribou to climatic shifts in the Arctic; 2014; FS; 2014-3103; Gustine, David; Adams, Layne; Whalen, Mary; Pearce, John

Year Published: 2014

Evidence for seasonal patterns in the relative abundance of avian influenza virus subtypes in blue-winged teal (Anas discors)

Seasonal dynamics of influenza A viruses (IAVs) are driven by host density and population immunity. Through an analysis of subtypic data for IAVs isolated from Blue-winged Teal (Anas discors), we present evidence for seasonal patterns in the relative abundance of viral subtypes in spring and summer/autumn.

Ramey, Andrew M.; Poulson, Rebecca L.; González-Reiche, Ana S.; Wilcox, Benjamin R.; Walther, Patrick; Link, Paul; Carter, Deborah L.; Newsome, George M.; Müller, Maria L.; Berghaus, Roy D.; Perez, Daniel R.; Hall, Jeffrey S.; Stallknecht, David E.
Evidence for seasonal patterns in the relative abundance of avian influenza virus subtypes in blue-winged teal (Anas discors); 2014; Article; Journal; Journal of Wildlife Diseases; Ramey, Andrew M.; Poulson, Rebecca L.; González-Reiche, Ana S.; Wilcox, Benjamin R.; Walther, Patrick; Link, Paul; Carter, Deborah L.; Newsome, George M.; Müller, Maria L.; Berghaus, Roy D.; Perez, Daniel R.; Hall, Jeffrey S.; Stallknecht, David E.

Year Published: 2014

Melanin-based color of plumage: role of condition and of feathers' microstructure

Whether melanin-based colors honestly signal a bird's condition during the growth of feathers is controversial, and it is unclear if or how the physiological processes underlying melanogenesis or color-imparting structural feather microstructure may be adversely affected by condition. Here we report results from two experiments designed to measure...

D'Alba, Liliana; Van Hemert, Caroline R.; Spencer, Karen A.; Heidinger, Britt J.; Gill, Lisa; Evans, Neil P.; Monaghan, Pat; Handel, Colleen M.; Shawkey, Matthew D.
D'Alba, L., C. R. Van Hemert, K. A. Spencer, B. J. Heidinger, L. Gill, N. P. Evans, P. Monaghan, C. M. Handel, and M. D. Shawkey. 2014. Melanin-based color of plumage: Role of condition and of feathers' microstructure. Integrative and Comparative Biology 54(4):633-644. doi:10.1093/icb/icu094

Year Published: 2014

Global research priorities to mitigate plastic pollution impacts on marine wildlife

Marine wildlife faces a growing number of threats across the globe, and the survival of many species and populations will be dependent on conservation action. One threat in particular that has emerged over the last 4 decades is the pollution of oceanic and coastal habitats with plastic debris. The increased occurrence of plastics in marine...

Vegter, Amanda C.; Barletta, Mário; Beck, Cathy A.; Borrero, Jose C.; Burton, Harry; Campbell, Marnie L.; Costa, Monica F.; Eriksen, Marcus; Eriksson, Cecilia; Estrades, Andres; Gilardi, Kirsten V.; Hardesty, Britta D.; do Sul, Juliana A. Ivar; Lavers, Jennifer L.; Lazar, Bojan; Lebreton, Laurent; Nichols, Wallace J.; Ribic, Christine A.; Ryan, Peter G.; Schuyler, Qamar A.; Smith, Stephen D. A.; Takada, Hideshige; Townsend, Kathy A.; Wabnitz, Colette C. C.; Wilcox, Chris; Young, Lindsay C.; Hamann, Mark
Vegter, A.C., Barletta, M., Beck, C., Borrero, J., Burton, H., Campbell, M.L., Costa, M.F., Eriksen, M., Eriksson, C., Estrades, A., Gilardi, K.V.K., Hardesty, B.D., Ivar do Sul, J.A., Lavers, J.L., Lazar, B., Lebreton, L., Nichols, W.J., Ribic, C.A., Ryan, P.G., Schuyler, Q.A., Smith, S.D.A., Takada, H., Townsend, K.A., Wabnitz, C.C.C., Wilsox, W., Young, LC., and Hamann, M., 2014, Global research priorities to mitigate plastic pollution impacts on marine wildlife: Endangered Species Research, v. 25, p. 225-247, http://dx.doi.org/10.3354/esr00623.

Year Published: 2014

Breeding site selection by coho salmon (Oncorhynchus kisutch) in relation to large wood additions and factors that influence reproductive success

The fitness of female Pacific salmon (Oncorhynchus spp.) with respect to breeding behavior can be partitioned into at least four fitness components: survival to reproduction, competition for breeding sites, success of egg incubation, and suitability of the local environment near breeding sites for early rearing of juveniles. We evaluated the...

Clark, Steven M.; Dunham, Jason B.; McEnroe, Jeffery R.; Lightcap, Scott W.
Clark, S.M., Dunham, J.B., McEnroe, J.R., Lightcap, S.W., 2014, Breeding site selection by Coho Salmon (Oncorhynchus kisutch) in relation to large wood additions and factors that influence reproductive success. DOI- 10.1139/cjfas-2014-0020: Canadian Journal of Fisheries and Aquatic Sciences, v. 71, p. 1498-1507

Year Published: 2014

Palila restoration research, 1996−2012

The Palila Restoration Project was initiated in 1996 by the U.S. Geological Survey to assist government agencies mitigate the effects of realigning Saddle Road (Highway 200) through Palila Critical Habitat (U.S. Fish and Wildlife Service 1998, Federal Highway Administration 1999). Ecological research on the palila (Loxioides bailleui), an...

Banko, Paul C.; Farmer, Chris; Banko, Paul C.; Farmer, Chris; Atkinson, Carter T.; Brinck, Kevin W.; Camp, Richad; Cole, Colleen; Canner, Raymond; Dougill, Steve; Goltz, Daniel; Gray, Elizabeth; Hess, Steven C.; Higashino, Jennifer; Jarvi, Susan I.; Johnson, Luanne; Laniawe, Leona; Laut, Megan; Miller, Linda; Murray, Christopher J.; Nelson, Daniel; Leonard, David L.; Oboyshi, Peter; Patch-Highfill, Leanne; Pollock, David D.; Rapozo, Kalei; Schwarzfeld, Marla; Slotterback, John; Stephens, Robert M.
Banko, P. C., and C. Farmer. 2014. Implications of research for palila restoration. Pp. 460–493 in P. C. Banko and C. Farmer (editors). Palila restoration research, 1996−2012. Hawaiʽi Cooperative Studies Unit Technical Report HCSU-046. University of Hawaiʽi at Hilo, Hilo, HI.

Year Published: 2014

Behavior of bats at wind turbines

Wind turbines are causing unprecedented numbers of bat fatalities. Many fatalities involve tree-roosting bats, but reasons for this higher susceptibility remain unknown. To better understand behaviors associated with risk, we monitored bats at three experimentally manipulated wind turbines in Indiana, United States, from July 29 to October 1, 2012...

Cryan, Paul M.; Gorresen, P. Marcos; Hine, Cris D.; Schirmacher, Michael; Diehl, Robert H.; Huso, Manuela M.; Hayman, David T.S.; Fricker, Paul D.; Bonaccorso, Frank J.; Johnson, Douglas H.; Heist, Kevin W.; Dalton, David C.
Behavior of bats at wind turbines; 2014; Article; Journal; Proceedings of the National Academy of Sciences; Cryan, Paul; Gorresen, Marcos; Hine, Cris D.; Schirmacher, Michael; Diehl, Robert H.; Huso, Manuela M.; Hayman, David T. S.; Fricker, Paul D.; Bonaccorso, Frank J.; Johnson, Douglas H.; Heist, Kevin; Dalton, David C.

Year Published: 2014

Landbird trends in national parks of the North Coast and Cascades Network, 2005-12

National parks in the North Coast and Cascades Network (NCCN) can fulfill vital roles as refuges for bird species dependent on late-successional forest conditions and as reference sites for assessing the effects of land-use and land-cover changes on bird populations throughout the larger Pacific Northwest region. Additionally, long-term monitoring...

Saracco, James F.; Holmgren, Amanda L.; Wilkerson, Robert L.; Siegel, Rodney B.; Kuntz, Robert C.; Jenkins, Kurt J.; Happe, Patricia J.; Boetsch, John R.; Huff, Mark H.
Landbird trends in national parks of the North Coast and Cascades Network, 2005-12; 2014; OFR; 2014-1202; Saracco, James, F.; Holmgren, Amanda, L.; Wilkerson, Robert L.; Siegel, Rodney B.; Kuntz, Robert C., II; Jenkins, Kurt J.; Happe, Patricia J.; Boetsch, John R.; Huff, Mark H.