Mission Areas

Ecosystems

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Filter Total Items: 566
Date published: April 17, 2016
Status: Active

Alabama Barrier Island Restoration Assessment at Dauphin Island

Dauphin Island, Alabama, is the only barrier island providing protection to much of Alabama's coastal natural resources. Severely impacted by repeated extreme events, like Hurricane Katrina and Deepwater Horizon oil spill, USGS and partners are conducting a joint study to evaluate the feasibility of certain alternatives to increase resiliency and sustainability of the island. 

Date published: April 16, 2016

Past and Future Impacts of Sea Level Rise on Coastal Habitats and Species (FISCHS)

USGS aims to integrate biological and hydrological models to help develop management tools to deal with the projected ecological consequences of rising sea level in coastal south Florida.

Date published: April 16, 2016

Determining the Ploidy and Resultant Reproductive Capability of Artificially Spawned and Wild Caught Asian Carp

The invasive grass carp and black carp are artificially spawned to produce triploids, which means they have three sets of chromosomes and are sterile. WARC scientists invented an early ploidy prediction process for produced fry, and a post-mortem assessment method for carp caught either in the wild or sold and hauled live to other states. 

Date published: April 16, 2016

Climate Change Effects on Coastal Marsh Foundation Species

Mangrove forests have migrated inland over the past few decades at many locations along the northern Gulf of Mexico coast. This expansion has been attributed to factors associated with climate change, such as increased salinity resulting from sea-level rise and longer intervals between winter freezes, which can kill cold-intolerant mangrove species. 

Date published: April 16, 2016
Status: Active

Asian Tiger Shrimp Distribution and Genetics

The Asian tiger shrimp began appearing in commercial shrimp catches in 2006. They grow larger than native shrimp and are known to be fierce predators - so shrimpers and managers are concerned about the potential effects this species might have. 

Date published: April 16, 2016

GIS and Custom Application Support for the Gulf Coast Ecosystem Restoration Council

 The scientists at the Wetland and Aquatic Science Center (WARC) have provided coastal restoration project managers and decision makers with GIS planning, database and custom application capacity since 1992. The scope and complexity of this support has increased over the years and has resulted in the development of a comprehensive geospatial and advanced application teams that provide decision...

Date published: April 16, 2016

Spatial Analysis Support for Coastal Wetlands Planning, Protection and Restoration Act (Breaux Bill) Planning Activities

WARC first implemented geographic information systems (GIS) in 1980 to help monitor the nature and extent of wetland habitat changes. The center continues to use GIS, remote sensing, and other computer based technologies to address a wide range of natural resource related issues. 

Date published: April 16, 2016

Adaptive Regulation of Waterfowl Harvests Using Incomplete Survey Information

The 2011 (Draft) Supplemental Environmental Impact Statement on Migratory Bird Hunting (EIS) offers four alternatives concerning the timing of the regulatory process for setting waterfowl hunting seasons. The no-change alternative involves a process by which most proposals for hunting seasons are developed in response to survey information that becomes available in early summer, such as...

Date published: April 16, 2016
Status: Active

Visual Guide to Louisiana Plants: A Web Based Searchable Plant Database and Photo Gallery of the Plants of Louisiana

Quality photographs of plant species are rare on the internet, often difficult to find, and are generally copyrighted, preventing them from being used by government agencies and non-government organizations, academics and the general public.

Date published: April 15, 2016

NRDA: Deepwater ROV Sampling to Assess Potential Impacts to Hardbottom Coral Communities and Associates from the Deepwater Horizon Oil Spill

The MC252 oil spill introduced hydrocarbons, dispersants, and drilling muds into the Gulf of Mexico, potentially adversely affecting the seafloor environment surrounding the spill site. 

Date published: April 15, 2016

USGS DISCOVRE: Benthic Ecology, Trophodynamics, and Ecosystem Connectivity – Lophelia II: Continuing Ecological Research on Deep-Sea Corals and Deep Reef Habitats in the Gulf of Mexico

Deep-sea coral habitats are complex ecosystems at the landscape and local level. While these systems may harbor substantial levels of biodiversity, they remain inadequately investigated.

Date published: April 15, 2016

Ecosystem Development After Wetland Restoration and Creation

Wetland restoration and creation efforts are increasingly proposed as means to compensate for wetland losses. To address the need for evaluating the development of ecosystem structure and function in restored and created wetlands, USGS compared created tidal wetlands sites to natural mangrove wetlands in Tampa Bay, Florida. 

Filter Total Items: 2,287
Year Published: 2015

Rethinking the longitudinal stream temperature paradigm: region-wide comparison of thermal infrared imagery reveals unexpected complexity of river temperatures

Prevailing theory suggests that stream temperature warms asymptotically in a downstream direction, beginning at the temperature of the source in the headwaters and leveling off downstream as it converges to match meteorological conditions. However, there have been few empirical examples of longitudinal patterns of temperature in large rivers due...

Fullerton, Aimee H.; Torgersen, Christian E.; Lawler, Joshua J.; Faux, Russell N.; Steel, E. Ashley; Beechie, Timothy J.; Ebersole, Joseph L.; Leibowitz, Scott J.
Fullerton, AH, Torgersen, CE, Lawler, JJ, Faux, RN, Steel, EA, Beechie, TJ, Ebersole, JL, and Leibowitz, SG (2015), Rethinking the longitudinal stream temperature paradigm: region-wide comparison of thermal infrared imagery reveals unexpected complexity of river temperatures. Hydrological Processes, doi: 10.1002/hyp.10506.

Year Published: 2015

Effects of changing climate on aquatic habitat and connectivity for remnant populations of a wide-ranging frog species in an arid landscape

Amphibian species persisting in isolated streams and wetlands in desert environments can be susceptible to low connectivity, genetic isolation, and climate changes. We evaluated the past (1900–1930), recent (1981–2010), and future (2071–2100) climate suitability of the arid Great Basin (USA) for the Columbia spotted frog (Rana...

Pilliod, David S.; Arkle, Robert S.; Robertson, Jeanne M; Murphy, Melanie; Funk, W. Chris
Pilliod, D. S., Arkle, R. S., Robertson, J. M., Murphy, M. A. and Funk, W. C. (2015), Effects of changing climate on aquatic habitat and connectivity for remnant populations of a wide-ranging frog species in an arid landscape. Ecology and Evolution. doi: 10.1002/ece3.1634

Year Published: 2015

Local variability mediates vulnerability of trout populations to land use and climate change

Land use and climate change occur simultaneously around the globe. Fully understanding their separate and combined effects requires a mechanistic understanding at the local scale where their effects are ultimately realized. Here we applied an individual-based model of fish population dynamics to evaluate the role of local stream variability in...

Penaluna, Brooke E.; Dunham, Jason B.; Railsback, Steve F.; Arismendi, Ivan; Johnson, Sherri L.; Bilby, Robert E; Safeeq, Mohammad; Skaugset, Arne E.
Penaluna BE, Dunham JB, Railsback SF, Arismendi I, Johnson SL, Bilby RE, et al. (2015) Local Variability Mediates Vulnerability of Trout Populations to Land Use and Climate Change. PLoS ONE 10(8): e0135334. doi:10.1371/journal.pone.0135334

Year Published: 2015

Evaluation of fisher (Pekania pennanti) restoration in Olympic National Park and the Olympic Recovery Area: 2014 annual progress report

With the translocation and release of 90 fishers (Pekania pennanti) from British Columbia to Olympic National Park during 2008–2010, the National Park Service and Washington Department of Fish and Wildlife accomplished the first phase of fisher restoration in Washington State. Beginning in 2013, we initiated a new research project to determine the...

Happe, Patricia J.; Jenkins, Kurt J.; Kay, Thomas J.; Pilgrim, Kristy L.; Schwartz, Michael K.; Lewis, Jeffrey C.; Aubry, Keith B.

Year Published: 2015

Key seabird areas in southern New England identified using a community occupancy model

Seabirds are of conservation concern, and as new potential risks to seabirds are arising, the need to provide unbiased estimates of species’ distributions is growing. We applied community occupancy models to detection/non-detection data collected from repeated aerial strip-transect surveys conducted in 2 large study plots off southern New...

O'Connell, Allan F.; Flanders, Nicholas P.; Gardner, Beth; Winiarski, Kristopher J.; Paton, Peter W. C.; Allison, Taber
Zipkin, E. F., Kinlan, B. P., Sussman, A., Rypkemae, D., Wimer, M., and O'Connell, A. F., 2015, Statistical guidelines for assessing marine avian hotspots and coldspots: A case study on wind energy development in the U.S. Atlantic Ocean: Biological Conservation, v. 191, p. 216-223.

Year Published: 2015

Projecting changes in subalpine tree populations with warming across an elevation gradient

Germino, Matthew J.; Kueppers, Lara; Conlisk, Erin; Castanha, Cristina; Moyes, Andrew; Smith, Jeremy; Veblen, Tom

Year Published: 2015

Multiscale analysis of river networks using the R package linbin

Analytical tools are needed in riverine science and management to bridge the gap between GIS and statistical packages that were not designed for the directional and dendritic structure of streams. We introduce linbin, an R package developed for the analysis of riverscapes at multiple scales. With this software, riverine data on aquatic habitat and...

Welty, Ethan Z.; Torgersen, Christian E.; Brenkman, Samuel J.; Duda, Jeffrey J.; Armstrong, Jonathan B.

Year Published: 2015

Effects of land use on greenhouse gas fluxes and soil properties of wetland catchments in the Prairie Pothole Region of North America

Wetland restoration has been suggested as policy goal with multiple environmental benefits including enhancement of atmospheric carbon sequestration. However, there are concerns that increased methane (CH4) emissions associated with restoration may outweigh potential benefits. A comprehensive, 4-year study of 119 wetland catchments was conducted...

Tangen, Brian A.; Finocchiaro, Raymond G.; Gleason, Robert A.
Tangen, B. A., R. G. Finocchiaro, and R. A. Gleason. 2015. Effects of land use on greenhouse gas fluxes and soil properties of wetland catchments in the Prairie Pothole Region of North America. Science of the Total Environment, 533:391–409, doi:10.1016/j.scitotenv.2015.06.148.

Year Published: 2015

Increasing elevation of fire in the Sierra Nevada and implications for forest change

Fire in high-elevation forest ecosystems can have severe impacts on forest structure, function and biodiversity. Using a 105-year data set, we found increasing elevation extent of fires in the Sierra Nevada, and pose five hypotheses to explain this pattern. Beyond the recognized pattern of increasing fire frequency in the Sierra Nevada since the...

Schwartz, Mark W.; Butt, Nathalie; Dolanc, Christopher R.; Holguin, Andrew; Moritz, Max A.; North, Malcolm P.; Safford, Hugh D.; Stephenson, Nathan L.; Thorne, James H.; van Mantgem, Phillip J.
Schwartz MW, N Butt, CR Dolanc, A Holguin, MA Moritz, MP North, HD Safford, NL Stephenson, JH Thorne, PJ van Mantgem. 2015. Increasing elevation of fire in the Sierra Nevada and implications for forest change. Ecosphere 6(7):121. http://dx.doi.org/10.1890/ES15-00003.1

Year Published: 2015

Using satellite vegetation and compound topographic indices to map highly erodible cropland buffers for cellulosic biofuel crop developments in eastern Nebraska, USA

Cultivating annual row crops in high topographic relief waterway buffers has negative environmental effects and can be environmentally unsustainable. Growing perennial grasses such as switchgrass (Panicum virgatum L.) for biomass (e.g., cellulosic biofuel feedstocks) instead of annual row crops in these high relief waterway buffers can...

Gu, Yingxin; Wylie, Bruce K.
Gu, Y., Wylie, B.K., 2016. Using satellite vegetation and compound topographic indices to map highly erodible cropland buffers for cellulosic biofuel crop developments in eastern Nebraska, USA. Ecol. Indicators 60, 64-70.

Year Published: 2015

High-tech or field techs: Radio-telemetry is a cost-effective method for reducing bias in songbird nest searching

We compared the efficacy of standard nest-searching methods with finding nests via radio-tagged birds to assess how search technique influenced our determination of nest-site characteristics and nest success for Golden-winged Warblers (Vermivora chrysoptera). We also evaluated the cost-effectiveness of using radio-tagged birds to find nests. Using...

Peterson, Sean M.; Streby, Henry M.; Lehman, Justin A.; Kramer, Gunnar R.; Fish, Alexander C.; Andersen, David E.

Year Published: 2015

Approaches to modeling landscape-scale drought-induced forest mortality

Drought stress is an important cause of tree mortality in forests, and drought-induced disturbance events are projected to become more common in the future due to climate change. Landscape Disturbance and Succession Models (LDSM) are becoming widely used to project climate change impacts on forests, including potential interactions with natural...

Gustafson, Eric J.; Shinneman, Douglas
Gustafson, E.J., Shinneman, D.J., 2015, Approaches to modeling landscape-scale drought-induced forest mortality In Perera AH, Sturtevant BR, and Buse LJ, eds. Simulation Modeling of Forest Landscape Disturbances: Springer, p. 45-72.

Filter Total Items: 539
July 28, 2012

H1 East Transect – 2012

Permanent Site: H1 East Transect; Depth: 5.6 Meters (Feet 18.4); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 10 months post-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 still mainly gravel with some...

July 28, 2012

C1 East Transect – 2012

Permanent Site: C1 East Transect; Depth: 8.8 Meters (Feet 28.8); Distance from river mouth: 0.7 Kilometers (0.4 Miles); Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.14525225,-123.57294101; Site Description: Substrate is entirely sand. Brown seaweeds are absent and only a few small red seaweeds remain (1:13, 2:31 seconds). Invertebrates are scarce and mainly consist of the...

July 28, 2012

H1 West Transect – 2012

Permanent Site: H1 West Transect; Depth: 5.0 Meters (Feet 16.4); Distance from river mouth: 2.4 Kilometers (1.5 Miles) east; Pre/Post Dam Removal: 10 months post-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 still mainly gravel with some...

July 27, 2012

F1 East Transect – 2012

Permanent Site: F1 East Transect; Depth: 6.2 Meters (20.4 Feet); Distance from river mouth: 1.3 Kilometers (0.8 Miles) east; Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.15292999, -123.55011402; Site Description: This is a shallow site with gravel/cobble substrate. Algae is almost all gone except for the perennial seaweed Pterygophora californica (0:32, 0:56, 1:21 seconds)...

July 27, 2012

C2 East Transect – 2012

Permanent Site: C2 East Transect; Depth: 16.1 Meters (Feet 52.7); Distance from river mouth: 0.7 Kilometers (0.4 Miles); Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.147841,-123.57596074; Site Description: One of our deepest sites. Substrate is now entirely all sand. Algae is almost gone. A few reds are seen at 0:48, 1:04, 1:49 seconds. Featherduster tubeworms are abundant,...

July 27, 2012

F1 West Transect – 2012

Permanent Site: F1 West Transect; Depth: 9.7 Meters (32 Feet); Distance from river mouth: 1.3 Kilometers (0.8 Miles) east; Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.15292999, -123.55078602; Site Description: This is a shallow site with gravel/cobble substrate and an occasional boulder. Algae is almost all gone except for the perennial seaweed Pterygophora californica (0:14...

July 26, 2012

C2 West Transect – 2012

Permanent Site: C2 West Transect; Depth: 17 Meters (Feet 55.7); Distance from river mouth: 0.7 Kilometers (0.5 Miles); Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.147841,-123.57663268; Site Description: One of our deepest sites. Substrate is now entirely all sand. Algae is almost gone. Few reds are seen at 0:21, 0:30, 0:35 seconds and only a few browns are left. An Agarum...

July 25, 2012

D1 East Transect – 2012

Permanent Site: D1 East Transect; Depth: 10.0 Meters (32.8 Feet); Distance from river mouth: 0.2 Kilometers (0.1 Miles); Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.15115998,-123.56734404; Site Description: This site is right off the mouth of the river. Substrate is still mainly gravel with some sand. All annual species of seaweeds are gone. The only species present is the...

July 25, 2012

A1 West Transect – 2012

Permanent Site: A1 West Transect; Depth: 8.4 Meters (27.7 Feet); Distance from river mouth: 1.9 Kilometers (1.2 Miles) West; Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.13870775, -123.586203; Site Description: Transect is in eastern part of Freshwater Bay. Sediment is primarily sand/sandy mud with patches of boulders. Seaweeds are sparse this year. Feather duster tubeworms...

July 25, 2012

D1 West Transect – 2012

Permanent Site: D1 West Transect; Depth: 10.3 Meters (33.8 Feet); Distance from river mouth: 0.2 Kilometers (0.1 Miles); Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.15115998,-123.56801602; Site Description: This site is right off the mouth of the river. Substrate is mainly gravel with some sand. All annual species of seaweeds are gone except for a few small reds (0:51, 1:00...

July 25, 2012

A1 East Transect – 2012

Permanent Site: A1 East Transect; Depth: 8.4 Meters (27.5 Feet); Distance from river mouth: 1.8 Kilometers (1.1 Miles) West; Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.13870775, -123.5855312; Site Description: Transect is in eastern part of Freshwater Bay. Sediment is primarily sand/sandy mud with an occasional boulder. Seaweeds are sparse. A patch of the perennial seaweed...

July 24, 2012

A2 West Transect – 2012

Permanent Site: A2 West Transect; Depth: 12.9 Meters (Feet 42.2); Distance from river mouth: Kilometers 1.8 (1.1 Miles); Pre/Post Dam Removal: 10 months post-dam removal; Lat/Long: 48.14130295, -123.5883331; Site Description: One of our deeper sites at over 40 feet. Sediment is primarily sand/sandy mud with a few scattered boulders. Seaweeds are very sparse this year and mainly consist of the...