Due to a lapse in appropriations, the majority of USGS websites may not be up to date and may not reflect current conditions. Websites displaying real-time data, such as Earthquake and Water and information needed for public health and safety will be updated with limited support. Additionally, USGS will not be able to respond to inquiries until appropriations are enacted.  For more information, please see www.doi.gov/shutdown

Mission Areas

Ecosystems

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The Ecosystems Mission Area provides impartial science information and tools to the Nation’s natural resource managers, with particular focus on the science needs of the Department of the Interior (DOI) and DOI bureaus to manage species, lands and priority ecosystems; fulfill treaty obligations; respond to and reduce threats to natural resources; and manage mineral and energy resources.

 

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Filter Total Items: 715
Date published: April 25, 2016

Spatial Analysis of Coastal Wetlands Planning, Protection and Restoration Act Projects

As the first federally mandated restoration program, Louisiana enacted the Coastal Wetlands Planning, Protection and Restoration Act (CWPPRA) to address Louisiana’s land loss crisis.

Date published: April 25, 2016
Status: Active

Gulf of Mexico Land Loss Change Assessment: A Cooperative Study with the Bureau of Ocean and Energy Management

Eighty-five percent of the coastal wetland loss in the contiguous United States occurs in the Gulf of Mexico. Documenting and understanding the occurrence of this wetland loss will provide for effective planning, mitigation, and restoration activities.

Date published: April 25, 2016
Status: Active

Hyper-Temporal Land Area Change Rates in Coastal Louisiana from 1973 to 2015

This study analyzes changes in the extent of land in coastal Louisiana by using an average of 81 datasets (multiple dates of satellite data from 1973 to 2014) for summarizing land and water areas.

Date published: April 25, 2016
Status: Active

Advanced Technological Solutions in Support of Greater Everglades Priority Ecosystem Science: Joint Ecosystem Modeling (JEM)

The JEM Biological Database offers secure data storage in relational databases, as well as web applications to manage, search, analyze, and report on captured data.

Date published: April 25, 2016

Collaborative Development of Ecological Forecasting Model and Data Manipulation Software: Everglades National Park, South Florida Natural Resources Center (SFNRC)

The goal of the Advanced Applications Team’s partnership with SFNRC is to facilitate the use of scientific research findings in restoration and land management decisions.

Contacts: Kevin Suir
Date published: April 25, 2016

Supporting large-scale biological monitoring and modeling through data management and visualization: Coastal Information Management System (CIMS)

The Coastal Protection and Restoration Authority (CPRA) and USGS have partnered to utilize the data management and visualization capacities of the Wetland and Aquatic Research Center’s Advanced Application Team to manage, deliver, and visualize the largest biological dataset maintained in coastal Louisiana.

Date published: April 20, 2016

American Fisheries Society List of Freshwater Snails from Canada and the United States

This website provides access to the list of freshwater gastropods (snails) in Canada and the United States as determined by the 2013 American Fisheries Society (AFS) Endangered Species Committee (ESC) on freshwater gastropods.

Contacts: Howard Jelks
Date published: April 20, 2016

American Fisheries Society Crayfish of the United States and Canada

This website provides access to the list of crayfish in Canada and the United States as determined by the 2007 American Fisheries Society (AFS) Endangered Species Committee (ESC) on Crayfishes.

Contacts: Howard Jelks
Date published: April 18, 2016

Environmental Flows and Bottomland Hardwood Habitat in the Southeastern U.S.

Environmental flows describes the quantity, quality, and timing of water flows required to sustain freshwater and estuarine ecosystems and the human livelihoods and well-being that depend on these ecosystems.

Contacts: Richard Day
Date published: April 18, 2016
Status: Active

Hurricane Sandy Surge and Marsh Dieback in the New Jersey Coastal Zone

Detection of storm surge impacts on coastal marshes requires regional or broader mapping of surge flooding above and below the wetland canopy and estimation of abnormal change in wetland condition.

Contacts: Amina Rangoonwala, Elijah Ramsey , III, Ph.D., Nicholas Enright
Date published: April 18, 2016

Joint Research on Water and Sedimentation Changes and Potential Impacts on Biodiversity along the Porsuk River, Turkey

The Porsuk River floodplain near Eskisehir, Turkey contains a large number of wetlands, which have been managed by humans for millennia.

Date published: April 18, 2016

Long-term Trends in Swamp Tree Growth across Drought and Salinity Gradients along the Northern Gulf Coast

This study will examine the potential effects of climate-change-induced sea level rise, drought and water extraction by examining tree growth patterns across the Gulf Coast, specifically targeting long-term research plots available in the North American Baldcypress Swamp Network (NABCSN) and the Suwannee River.

Filter Total Items: 2,932
Year Published: 2016

Online induction heating for determination of isotope composition of woody stem water with laser spectrometry: A methods assessment

Application of stable isotopes of water to studies of plant–soil interactions often requires a substantial preparatory step of extracting water from samples without fractionating isotopes. Online heating is an emerging approach for this need, but is relatively untested and major questions of how to best deliver standards and assess...

Lazarus, Brynne E.; Germino, Matthew J.; Vander Veen, Jessica L.
Brynne E. Lazarus, Matthew J. Germino & Jessica L. Vander Veen (2016): Online induction heating for determination of isotope composition of woody stem water with laser spectrometry: A methods assessment, Isotopes in Environmental and Health Studies, DOI: 10.1080/10256016.2016.1141205

Year Published: 2016

Habitat selection by juvenile Mojave Desert tortoises

Growing pressure to develop public lands for renewable energy production places several protected species at increased risk of habitat loss. One example is the Mojave desert tortoise (Gopherus agassizii), a species often at the center of conflicts over public land development. For this species and others on public lands, a better understanding of...

Todd, Brian D; Halstead, Brian J.; Chiquoine, Lindsay P.; Peaden, J. Mark; Buhlmann, Kurt A.; Tuberville, Tracey D.; Nafus, Melia G.
Todd, BD, BJ Halstead, LP Chiquoine, JM Peaden, KA Buhlmann, TD Tuberville, MG Nafus. 2016. Habitat selection by juvenile Mojave Desert tortoises. The Journal of Wildlife Management. doi: 10.1002/jwmg.1054

Year Published: 2016

Influence of species, size and relative abundance on the outcomes of competitive interactions between brook trout and juvenile coho salmon

Resource competition between animals is influenced by a number of factors including the species, size and relative abundance of competing individuals. Stream-dwelling animals often experience variably available food resources, and some employ territorial behaviors to increase their access to food. We investigated the factors that affect dominance...

Thornton, Emily J; Duda, Jeffrey J.; Quinn, Thomas P.
Thornton, E.J., J.J. Duda, and T.P. Quinn. 2016. Influence of species, size and relative abundance on the outcomes of competitive interactions between brook trout and juvenile coho salmon. Ethology Ecology & Evolution.

Year Published: 2016

Cooperative Fish and Wildlife Research Units Program—2015 Year In Review

Summary The Cooperative Fish and Wildlife Research Unit (CRU) Program had its 80th anniversary in 2015. We did not have a party, but those of us who work directly for the Unit program on a daily basis celebrate the privilege we feel in being part of one of the greatest conservation institutions in history. Our mission is our hallmark: meeting the...

Organ, John F.; Thompson, John; Dennerline, Don E.; Childs, Dawn
Organ, J.F.; Thompson, J.D.; Dennerline, Don; and Childs, D.E., 2016, Cooperative Fish and Wildlife Research Units—2015 year in review: U.S. Geological Survey Circular 1420, 36 p., http://dx.doi.org/10.3133/circ1420.

Year Published: 2016

It’s what’s inside that counts: Egg contaminant concentrations are influenced by estimates of egg density, egg volume, and fresh egg mass

In egg contaminant studies, it is necessary to calculate egg contaminant concentrations on a fresh wet weight basis and this requires accurate estimates of egg density and egg volume. We show that the inclusion or exclusion of the eggshell can influence egg contaminant concentrations, and we provide estimates of egg density (both with and without...

Herzog, Mark P.; Ackerman, Joshua T.; Eagles-Smith, Collin A.; Hartman, Christopher
Herzog, MP, JT Ackerman, CA Eagles-Smith, CA Hartman. 2016. It’s what’s inside that counts: egg contaminant concentrations are influenced by estimates of egg density, egg volume, and fresh egg mass. Ecotoxicology. doi: 10.1007/s10646-016-1635-9

Year Published: 2016

Desert tortoise annotated bibliography, 1991-2015

Introduction Agassiz’s desert tortoise, Gopherus agassizii, was considered a single species for 150 years after its discovery by James Cooper (1861), with a geographic range extending from southeastern California, southern Nevada, and southwestern Utah southward into northern Sinaloa, Mexico (Murphy and others, 2011). What was once G....

Berry, Kristin H.; Lyren, Lisa M.; Mack, Jeremy S.; Brand, L. Arriana; Wood, Dustin A.
Berry, K.H., Lyren, L.M., Mack, J.S., Brand, L.A., and Wood, D.A., 2016, Desert tortoise annotated bibliography, 1991–2015: U.S. Geological Survey Open-File Report 2016-1023, 312 p., http://dx.doi.org/10.3133/ofr20161023.

Year Published: 2016

Breeding sites and winter site fidelity of Piping Plovers wintering in The Bahamas, a previously unknown major wintering area

Most of the known wintering areas of Piping Plovers (Charadrius melodus) are along the Atlantic and Gulf coasts of the United States and into Mexico, and in the Caribbean. However, 1066 threatened/endangered Piping Plovers were recently found wintering in The Bahamas, an area not previously known to be important for the species. Although...

Gratto-Trevor, Cheri; Haig, Susan M.; Miller, Mark P.; Mullins, Thomas D.; Maddock, Sidney; Roche, Erin A.; Moore, Predensa

Year Published: 2016

Maternal transfer of contaminants in birds: Mercury and selenium concentrations in parents and their eggs

We conducted a detailed assessment of the maternal transfer of mercury and selenium to eggs in three bird species (n = 107 parents and n = 339 eggs), and developed predictive equations linking contaminant concentrations in eggs to those in six tissues of the mother (blood, muscle, liver, kidney, breast feathers, and head...

Ackerman, Joshua T.; Eagles-Smith, Collin A.; Herzog, Mark P.; Hartman, C. Alex

Year Published: 2016

Dragonfly Mercury Project—A citizen science driven approach to linking surface-water chemistry and landscape characteristics to biosentinels on a national scale

Mercury is a globally distributed pollutant that threatens human and ecosystem health. Even protected areas, such as national parks, are subjected to mercury contamination because it is delivered through atmospheric deposition, often after long-range transport. In aquatic ecosystems, certain environmental conditions can promote microbial processes...

Eagles-Smith, Collin A.; Nelson, Sarah J.; Willacker,, James J.; Flanagan Pritz, Colleen M.; Krabbenhoft, David P.
Eagles-Smith, C.A., Nelson, S.J., Willacker, J.J., Jr., Flanagan Pritz, C.M., and Krabbbenhoft, D.P., 2016, Dragonfly Mercury Project—A citizen science driven approach to linking surface-water chemistry and landscape characteristics to biosentinels on a national scale: U.S. Geological Survey Fact Sheet 2016-3005, 4 p., http://dx.doi.org/10.3133/fs20163005.

Year Published: 2016

Lake trout (Salvelinus namaycush) suppression for bull trout (Salvelinus confluentus) recovery in Flathead Lake, Montana, North America

Non-native lake trout Salvelinus namaycush displaced native bull trout Salvelinus confluentus in Flathead Lake, Montana, USA, after 1984, when Mysis diluviana became abundant following its introduction in upstream lakes in 1968–1976. We developed a simulation model to determine the fishing mortality rate on lake trout that would enable bull trout...

Hansen, Michael J.; Hansen, Barry S; Beauchamp, David A.
Hansen, M. J., B. S. Hansen, and D. A. Beauchamp. 2016. Lake trout (Salvelinus namaycush) suppression for bull trout (Salvelinus confluentus) recovery in Flathead Lake, Montana, North America. Hydrobiologia doi:10.1007/s10750-016-2703-0

Year Published: 2016

Surface-air mercury fluxes across Western North America: A synthesis of spatial trends and controlling variables

Mercury (Hg) emission and deposition can occur to and from soils, and are an important component of the global atmospheric Hg budget. This paper focuses on synthesizing existing surface-air Hg flux data collected throughout the Western North American region and is part of a series of geographically focused Hg synthesis projects. A database of...

Eckley, Chris S.; Tate, Michael T.; Lin, Che-Jen; Gustin, Mae S.; Dent, Stephen; Eagles-Smith, Collin A.; Lutz, Michelle A; Wickland, Kimberly; Wang, Bronwen; Gray, John E.; Edwards, Grant; Krabbenhoft, David P.; Smith, David
Eckley, C.S., Tate, M.T., Lin, C., Gustin, M., Dent, S., Eagles-Smith, C.A., Lutz, M., Wickland, K.P., Wang, B., Gray, J.E., Edwards, G.C., Krabbenhoft, D.P., Smith, D.B., 2016, Surface-air mercury fluxes across Western North America- a synthesis of spatial trends and controlling variables: Science of the Total Environment, p. online.

Year Published: 2016

Reconnecting fragmented sturgeon populations in North American rivers

The majority of large North American rivers are fragmented by dams that interrupt migrations of wide-ranging fishes like sturgeons. Reconnecting habitat is viewed as an important means of protecting sturgeon species in U.S. rivers because these species have lost between 5% and 60% of their historical ranges. Unfortunately, facilities designed to...

Jager, Henriette; Parsley, Michael J.; Cech, Joseph J. Jr.; McLaughlin, R.L.; Forsythe, Patrick S.; Elliott, Robert S.
Jager, H.I., M.J. Parsley, J.J. Cech Jr., R.L. McLaughlin, P.S. Forsythe, R.F. Elliott, and B.M. Pracheil. 2016. Reconnecting fragmented sturgeon populations in North American rivers. Fisheries 41(3): 140-148. DOI: 10.1080/03632415.2015.1132705.

Filter Total Items: 660
August 21, 2011

4SP1 East Transect – 2011

Permanent Site: 4SP1 - East Transect; Depth: 6.1 Meters (19.9 Feet); Distance from river mouth: 0.8 Kilometers (0.5 Miles) East; Pre/Post Dam Removal: 1 month pre-dam removal; Lat/Long: 48.15257, -123.556704; Site Description: Predominantly a high current site with gravel/cobble substrate covered in seaweeds. The tall, stalked seaweed seen in the video is the perennial

...
August 20, 2011

C2 West Transect – 2011

Permanent Site: C2 West Transect; Depth: 16.8 Meters (Feet 55.2); Distance from river mouth: 0.7 Kilometers (0.5 Miles); Pre/Post Dam Removal: 1 month pre-dam removal; Lat/Long: 48.147841,-123.57663268; Site Description: Mainly sand with small amounts of gravel. One of our deepest sites. Mainly sand with small amounts of gravel. Red and brown seaweeds are abundant but grow

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August 20, 2011

C2 East Transect – 2011

Permanent Site: C2 East Transect; Depth: 16.5 Meters (Feet 54); Distance from river mouth: 0.7 Kilometers (0.4 Miles); Pre/Post Dam Removal: 1 month pre-dam removal; Lat/Long: 48.147841,-123.57596074; Site Description: One of our deepest sites. Mainly sand with small amounts of gravel. Numerous species of seaweeds are present throughout entire transect but growth is

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August 19, 2011

H1 West Transect – 2011

Permanent Site: H1 West Transect; Depth: 5.9 Meters (Feet 19.4); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 1 month pre-dam removal; Lat/Long: 48.14803012,-123.53535558; Site Description: This is a shallow site and one of the farthest removed from the effects of the sediment plume outside of the control sites. Substrate is mainly

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August 19, 2011

D2 East Transect – 2011

Permanent Site: D2 East Transect; Depth: 12.1 Meters (39.8 Feet); Distance from river mouth: 0.3 Kilometers (0.2 Miles); Pre/Post Dam Removal: 1 month pre-dam removal; Lat/Long: 48.15233001,-123.56829403; Site Description: This site is right off the mouth of the river. Substrate is mainly gravel with some sand. Seaweed is abundant. Bull kelp Nereocystis luetkeana (1:26, 1:

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August 19, 2011

D2 West Transect – 2011

Permanent Site: D2 West Transect; Depth: 12.6 Meters (41.3 Feet); Distance from river mouth: 0.3 Kilometers (0.2 Miles); Pre/Post Dam Removal: 1 month pre-dam removal; Lat/Long: 48.15233001,-123.56896603; Site Description: This site is right off the mouth of the river. Substrate is mainly gravel with some sand. Seaweed is abundant. Bull kelp Nereocystis luetkeana (0:10, 1:

...
August 18, 2011

GP2 West Transect – 2011

Permanent Control Site: GP2 West Transect; Depth: 13.1 Meters (43 Feet); Distance from river mouth: 18.8 Kilometers (11.6 Miles) east; Pre/Post Dam Removal: 1 month pre-dam removal; Lat/Long: 48.12781102,-123.31645664; Site Description: This site was established as the eastern control. Substrate is mainly a gravel/sand/cobble mixture surrounding boulders (1:05 seconds).

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August 18, 2011

GP1 East Transect – 2011

Permanent Control Site: GP1 East Transect; Depth: 7.4 Meters (24.2 Feet); Distance from river mouth: 19.0 Kilometers (11.8 Miles) east; Pre/Post Dam Removal: 1 month pre-dam removal; Lat/Long: 48.11852521,-123.31538047; Site Description: This site was established as the eastern control. Depth is medium-shallow. Substrate is mainly a gravel/sand/cobble mixture surrounding

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August 18, 2011

GP2 East Transect – 2011

Permanent Control Site: GP2 East Transect; Depth: 12.9 Meters (42.3 Feet); Distance from river mouth: 18.8 Kilometers (11.7 Miles) east; Pre/Post Dam Removal: 1 month pre-dam removal; Lat/Long: 48.12781102,-123.31645664; Site Description: This site was established as the eastern control. Substrate is mainly a gravel sand mixture. A few large boulders are located off

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August 18, 2011

GP1 West Transect — 2011

Permanent Control Site: GP1 West Transect; Depth: 7.8 Meters (25.7 Feet); Distance from river mouth: 19.0 Kilometers (11.8 Miles) east; Pre/Post Dam Removal: 1 month pre-dam removal; Lat/Long: 48.11852521,-123.31605203; Site Description: This site was established as the eastern control. Depth is medium-shallow. Substrate is mainly a gravel/sand/cobble mixture surrounding

...
August 8, 2011

C1 West Transect – 2011

Permanent Site: C1 West Transect; Depth: Meters (Feet); Distance from river mouth: 0.7 Kilometers (0.4 Miles); Pre/Post Dam Removal: 1 month pre-dam removal; Lat/Long: 48.14525225,-123.57361291; Site Description: Substrate is clean sand with scatterings of gravel. Patches of brown seaweed, mainly Alaria marginata (0:19 seconds) and Saccharina spp., and red algae (0:13

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August 8, 2011

H1 East Transect – 2011

Permanent Site: H1 East Transect; Depth: 5.5 Meters (Feet 18.0); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 1 month pre-dam removal; Lat/Long: 48.1479177,-123.53472865; Site Description: This is a shallow site and one of the farthest removed from the effects of the sediment plume outside of the control sites. Substrate is mainly

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