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We conduct impartial, multi- and interdisciplinary research and monitoring on a large range of natural-resource issues that impact the quality of life of citizens and landscapes of the Southeastern United States and the Caribbean region.

Filter Total Items: 234
Swamp tree growth study sites on the southern United States
Date Published: April 18, 2016
Status: Active

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.

Rainwater Killifish (Lucania parva)
Date Published: April 18, 2016
Status: Completed

Baseline Aquatic Contamination and Endocrine Status in Resident Fish Populations of Biscayne National Park and in the Adjacent Coastal Environment

As part of the Comprehensive Everglades Restoration Plan, water managers are planning to use treated wastewater from the South District Wastewater Treatment Plant (WWTP) to supplement the canal waters that will be used to rehydrate wetlands adjacent to the Biscayne National Park (Park).

Population Demography and Food Web Analysis of Large Aquatic Salamanders (Siren and Amphiuma) in North Florida
Date Published: April 17, 2016
Status: Active

Population Demography and Food Web Analysis of Large Aquatic Salamanders (Siren and Amphiuma) in North Florida

Understanding amphibian's life-histories can help predict how they may persist in aquatic habitats in the face of droughts and other climate change-associated events. 

Socio-Ecological Conservation Targets for the Peninsular Florida Landscape Conservation Cooperative
Date Published: April 17, 2016

Socio-Ecological Conservation Targets for the Peninsular Florida Landscape Conservation Cooperative

Peninsular Florida has a high density of species and ecosystems of conservation concern, as well as many threats to the persistence of native species and their habitats. USGS worked closely with the Peninsular Florida Landscape Conservation Cooperative to define conservation targets to help meet conservation goals. 

Peninsular Florida Landscape Conservation Cooperative (PFLCC) Climate Scenarios and Species Vulnerability Assessment
Date Published: April 17, 2016

Peninsular Florida Landscape Conservation Cooperative (PFLCC) Climate Scenarios and Species Vulnerability Assessment

Peninsular Florida is one of the most vulnerable regions to climate change in the United States. With complex socioeconomic and ecology dynamics and a large number of governing agencies involved in conservation planning, USGS worked to created an appropriate framework for landscape conservation cooperative-scale decision-making across current conservation planning agencies and jurisdictions...

Winter Manatee Foraging Behavior and the Decline of Seagrass Beds in the Northern Indian River Lagoon
Date Published: April 17, 2016

Winter Manatee Foraging Behavior and the Decline of Seagrass Beds in the Northern Indian River Lagoon

With high numbers of manatees using the Florida Power and Light power plant warm water refuge during winter, their impact on the seagrass beds in the Indian River Lagoon is considered an important indicator of the long-term capacity of the area to support the manatees. USGS is working with partners to investigate the spatial extent and intensity of manatee use of seagrass beds in the area. ...

Contacts: James Reid
Mangrove Migration Network
Date Published: April 17, 2016

Mangrove Migration Network

At the poleward marsh-mangrove ecotone, mangrove abundance and coverage is winter temperature-sensitive in that it oscillates in response to the frequency, duration, and/or intensity of extreme winter temperatures. Future winter climate change is expected to facilitate poleward mangrove range expansion at the expense of salt marshes in Texas, Louisiana, and parts of Florida. 

Incorporating Future Change into Current Conservation Planning: Evaluating Wetland Migration along the Gulf of Mexico under Alte
Date Published: April 17, 2016

Incorporating Future Change into Current Conservation Planning: Evaluating Wetland Migration along the Gulf of Mexico under Alternative Sea-Level Rise and Urbanization Scenarios

More than half of contiguous U.S. coastal wetlands are located along the Gulf of Mexico coast. These highly-productive wetlands support many ecosystem goods and services and fish and wildlife habitat. Historically, coastal wetlands have adapted to sea-level changes via lateral and vertical movement on the landscape. As sea levels rise in the future, coastal wetlands will adapt and migrate...

Macroclimatic Controls of Coastal Wetland Ecosystem Structure and Function
Date Published: April 17, 2016

Macroclimatic Controls of Coastal Wetland Ecosystem Structure and Function

At the global-scale, macroclimatic drivers govern ecosystem structure and function in tidal saline wetlands (e.g., salt marshes, mangrove forests, salt flats). However, global reviews and models for these ecosystems typically do not directly include climatic drivers. The objective of this research is to examine and forecast the effects of macroclimatic drivers on wetland ecosystem structure...

Map of habitat for Imperiled Freshwater Mussel Species in the S
Date Published: April 17, 2016
Status: Active

Life History Characterization and Host Fish Identification for Federally Listed and Imperiled Freshwater Mussel Species in the Suwannee River Basin in Georgia and Florida

Freshwater mussels are considered the most imperiled group of animals in the United States. These animals provide valuable ecological services by filtering water, sequestering nutrients, and providing forage for migratory birds, small mammals, and turtles. They also have a unique and complex life cycle that makes them especially vulnerable to human disturbances. It includes a parasitic larval...

Evaluation of Stream Reaches for Mussel Reintroduction in the Upper Coosa Watershed, NW Georgia
Date Published: April 17, 2016
Status: Active

Evaluation of Stream Reaches for Mussel Reintroduction in the Upper Coosa Watershed, NW Georgia

The Conasauga River in northwest Georgia and southeast Tennessee harbors the majority of mussel diversity still found in the Georgia portion of the Upper Coosa Basin. While the Conasauga historically supported at least 44 mussel species, only about 20 species remain. 

Mississippi Coastal Improvements Program (MsCIP) - Adaptive Management and Monitoring Planning and Implementation
Date Published: April 17, 2016

Mississippi Coastal Improvements Program (MsCIP) - Adaptive Management and Monitoring Planning and Implementation

 The Mississippi barrier islands are dynamic coastal landforms that are the first line of defense between the Gulf of Mexico and the Mississippi mainland coast. These islands are experiencing changes in structure (land area and habitat) and geomorphic processes (erosion and accretion) due to frequent intense storms, relative rise in sea level, and changes in sediment supply. A long-term...

Contacts: Michelle Meyers
Filter Total Items: 3,035
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Year Published: 2017

Assessing welfare of individual sirenians in the wild and in captivity

Assessing the welfare of wild populations of sirenians has required a “generalist” approach. The outcome has been a subjective decision as to whether what the observers are witnessing in an individual or group of animals is normal and whether that has positive or negative consequences. The understanding of sirenian welfare requirements, and a...

Flint, Mark; Bonde, Robert K.
Flint, M., and Bonde, R.K., 2017, Assessing welfare of individual Sirenians in the wild and in captivity, in Butterworth, A., Ed., Marine Mammal Welfare: Human Induced Change in the Marine Environment and its Impacts on Marine Mammal Welfare, Animal Welfare 17, p. 381-393, https://doi.org/10.1007/978-3-319-46994-2_21.

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Year Published: 2017

Human interactions with sirenians (manatees and dugongs)

There are three extant sirenian species of the Trichechidae family and one living Dugongidae family member. Given their close ties to coastal and often urbanized habitats, sirenians are exposed to many types of anthropogenic activities that result in challenges to their well-being, poor health, and even death. In the wild, they are exposed to...

Bonde, Robert K.; Flint, Mark
Bonde, R.K., and Flint, M., 2017, Human interactions with sirenians (manatees and dugongs) in Butterworth, A., ed., Marine Mammal Welfare: Human Induced Change in the Marine Environment and its Impacts on Marine Mammal Welfare, Animal Welfare 17, p. 299-314, https://doi.org/10.1007/978-3-319-46994-2_17.

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Year Published: 2017

Historical changes in organic matter input to the muddy sediments along the Zhejiang-Fujian Coast, China over the past 160 years

The burial of sedimentary organic matter (SOM) in the large river-influenced estuarine-coastal regions is affected by hydrodynamic sorting, diagenesis and human activities. Typically, the inner shelf region of the East China Sea is a major carbon sink of the Yangtze River-derived fine-grained sediments. Most of the previous work concentrated on...

Chen, Li-lei; Liu, Jian; Xing, Lei; Krauss, Ken W.; Wang, Jia-sheng; Xu, Gang; Li, Li
Chen, L., Liu, J., Xing, L., Krauss, K.W., Wang, J., Xu, G., and Li, L., 2017, Historical changes in organic matter input to the muddy sediments along the Zhejiang-Fujian Coast, China over the past 160 years: Organic Geochemistry, Available Online, https://doi.org/10.1016/j.orggeochem.2017.06.003.

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Year Published: 2017

Assessment of phytoplankton resources suitable for bigheaded carps in Lake Michigan derived from remote sensing and bioenergetics

We used bioenergetic simulations combined with satellite-measured water temperature and estimates of algal food availability to predict the habitat suitability of Lake Michigan for adult silver carp (Hypophthalmichthys molitrix) and bighead carp (H. nobilis). Depending on water temperature, we found that bigheaded carp require ambient algal...

Anderson, Karl R.; Chapman, Duane C.; Wynne, Tim T.; Paukert, Craig P.
Anderson, K.R., Chapman, D.C., Wynne, T.T., and Paukert, C.P., 2017, Assessment of phytoplankton resources suitable for bigheaded carps in Lake Michigan derived from remote sensing and bioenergetics, Journal of Great Lakes Research 43(3): 90-99

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Year Published: 2017

Gulf Coast vulnerability assessment: Mangrove, tidal emergent marsh, barrier islands and oyster reef

Climate, sea level rise, and urbanization are undergoing unprecedented levels of combined change and are expected to have large effects on natural resources—particularly along the Gulf of Mexico coastline (Gulf Coast). Management decisions to address these effects (i.e., adaptation) require an understanding of the relative vulnerability of various...

Watson, Amanda; Reece, Joshua; Tirpak, Blair; Edwards, Cynthia Kallio; Geselbracht, Laura; Woodrey, Mark; LaPeyre, Megan K.; Dalyander, Patricia (Soupy)
Watson, A., Reece, J., Tirpak, B.E., Edwards, C.K., Geselbracht, L., Woodrey, M., La Peyre, M.K., and Dalyander, P.S., 2017, The Gulf Coast Vulnerability Assessment: Mangrove, Tidal Emergent Marsh, Barrier Islands, and Oyster Reef: Forest and Wildlife Research Center, Research Bulletin WFA421, Mississippi State University, 100 p., http://www.fwrc.msstate.edu/pubs/Gulf_Coast_Vulnerability_Assessment.pdf.

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Year Published: 2017

Reproductive strategy, spawning induction, spawning temperatures and early life history of captive sicklefin chub Macrhybopsis meeki

Macrhybopsis reproduction and propagule traits were studied in the laboratory using two temperature regimes and three hormone treatments to determine which methods produced the most spawns. Only sicklefin chub Macrhybopsis meeki spawned successfully although sturgeon chub Macrhybopsis gelida released unfertilized eggs. All temperature and hormone...

Albers, Janice L.; Wildhaber, Mark L.
Albers, J.L. and Wildhaber, M.L., 2017, Reproductive strategy, spawning induction, spawning temperatures and early life history of captive sicklefin chub Macrhybopsis meeki, Journal of Fish Biology, Early View Edition, June 2017

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Year Published: 2017

Prevalence of Batrachochytrium dendrobatidis and B. salamandrivorans in the Gulf Coast Waterdog, Necturus beyeri, from Southeast Louisiana, USA

The globally widespread amphibian fungal pathogen Batrachochytrium dendrobatidis (Bd) has been linked to amphibian declines worldwide (Lips et al. 2006; Skerratt et al. 2007). In Louisiana, USA, Bd has been found in several amphibian species (Chatfield et al. 2012; Rothermel et al. 2008), but to our knowledge no population-level die-offs have been...

Glorioso, Brad M.; Waddle, J. Hardin; Richards-Zawacki, Corinne L.
Glorioso, B., Waddle, H., and Richards-Zawacki, C.L., 2017, Prevalence of Batrachochytrium dendrobatidis and B. salamandrivorans in the Gulf Coast Waterdog, Necturus beyeri, from Southeast Louisiana, USA: Herpetological Review, v. 48, no. 2, p. 360-363.

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Year Published: 2017

Comparison of size, terminal fall velocity, and density of bighead carp, silver carp, and grass carp eggs for use in drift modeling

Invasive Asian carp established in the United States spawn in the turbulent water of rivers, and their eggs and early larvae develop while drifting in the current. The eggs, which are believed to perish if they settle before hatching, are slightly denser than water and are held in suspension by water turbulence. It is possible to use egg drift...

George, Amy E.; Garcia, Tatiana; Chapman, Duane C.
George, A.E., Garcia, T., and Chapman, D.C., 2017, Comparison of size, terminal fall velocity, and density of bighead carp, silver carp, and grass carp eggs for use in drift modeling, Transactions of the American Fisheries Society 146(5): 834-843

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Year Published: 2017

Global hotspots and correlates of alien species richness across taxonomic groups

Human-mediated transport beyond biogeographic barriers has led to the introduction and establishment of alien species in new regions worldwide. However, we lack a global picture of established alien species richness for multiple taxonomic groups. Here, we assess global patterns and potential drivers of established alien species richness across...

Dawson, Wayne; Moser, Dietmar; van Kleunen, Mark; Kreft, Holger; Pergl, Jan; Pysek, Petr; Weigelt, Patrick; Winter, Marten; Lenzner, Bernd; Blackburn, Tim M.; Dyer, Ellie; Cassey, Phillip; Scrivens, Sally-Louise; Economo, Evan P.; Guenard, Benoit; Capinha, Cesar; Seebens, Hanno; Garcia-Diaz, Pablo; Nentwig, Wolfgang; Garcia-Berthou, Emili; Casal, Christine; Mandrak, Nicholas E.; Fuller, Pam L.; Meyer, Carsten; Essl, Franz
Dawson, W., Moser, D., van Kleunen, M., Kreft, H., Pergl, J., Pysek, P., Weigelt, P., Winter, M., Lenzner, B., Blackburn, T.M., Dyer, E.E., Cassey, P., Scrivens, S.L., Economo, E.P., Guenard, B., Capinha, C., Seebens, H., Garcia-Diaz, P., Nentwig, W., Garcia-Berthou, E., Casal, C., Mandrak, N.E., Fuller, P., Meyer, C., and Essl, F., 2017, Global hotspots and correlates of alien species richness across taxonomic groups: Nature Ecology and Evolution, v. 1, art. 0186, https://doi.org/10.1038/s41559-017-0186.

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Year Published: 2017

Geophysics- and geochemistry-based assessment of the geochemical characteristics and groundwater-flow system of the U.S. part of the Mesilla Basin/Conejos-Médanos aquifer system in Doña Ana County, New Mexico, and El Paso County, Texas, 2010–12

One of the largest rechargeable groundwater systems by total available volume in the Rio Grande/Río Bravo Basin (hereinafter referred to as the “Rio Grande”) region of the United States and Mexico, the Mesilla Basin/Conejos-Médanos aquifer system, supplies water for irrigation as well as for cities of El Paso, Texas; Las Cruces, New Mexico; and...

Teeple, Andrew P.
Teeple, A.P., 2017, Geophysics- and geochemistry-based assessment of the geochemical characteristics and groundwater-flow system of the U.S. part of the Mesilla Basin/Conejos-Médanos aquifer system in Doña Ana County, New Mexico, and El Paso County, Texas, 2010–12: U.S. Geological Survey Scientific Investigations Report 2017–5028, 183 p., https://doi.org/10.3133/sir20175028.

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Year Published: 2017

Mangrove species' responses to winter air temperature extremes in China

The global distribution and diversity of mangrove forests is greatly influenced by the frequency and intensity of winter air temperature extremes. However, our understanding of how different mangrove species respond to winter temperature extremes has been lacking because extreme freezing and chilling events are, by definition, relatively uncommon...

Chen, Luzhen; Wang, Wenqing; Li, Qingshun Q.; Zhang, Yihui; Yang, Shengchang; Osland, Michael J.; Huang, Jinliang; Peng, Congjiao
Chen, L., Wang, W., Li, Q.Q., Zhang, Y., Yang, S., Osland, M.J., Huang, J., and Peng, C., 2017, Mangrove species' responses to winter air temperature extremes in China: Ecosphere, v. 8, no. 6, art. e01865, http://dx.doi.org/10.1002/ecs2.1865.

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Year Published: 2017

Sensitivity of lake sturgeon (Acipenser fulvescens) early life stages to 2,3,7,8-tetrachlorodibenzo-P-dioxin and 3,3′,4,4′,5-pentachlorobiphenyl

The aquatic food web of the Great Lakes has been contaminated with polychlorinated biphenyls (PCBs) since the mid-20th century. Threats of PCB exposures to long-lived species of fish, such as lake sturgeon (Acipenser fulvescens), have been uncertain because of a lack of information on the relative sensitivity of the species. The objective of the...

Tillitt, Donald E.; Buckler, Justin A.; Nicks, Diane; Candrl, James; Claunch, Rachel; Gale, Robert W.; Puglis, Holly J.; Little, Edward E.; Linbo, Tiffany L.; Baker, Mary
Tillitt, D.E., Buckler, J.A., Nicks, D.K., Candrl, J.S., Claunch, R.A., Gale, R.W., Puglis, H.J., Little, E.E., Linbo, T.L., and Baker, M., 2017, Sensitivity of lake sturgeon (Acipenser fulvescens) early life stages to 2,3,7,8-tetrachlorodibenzo-P-dioxin and 3,3′,4,4′,5-pentachlorobiphenyl: Environmental Toxicology and Chemistry 36(4): 988-998

Filter Total Items: 119
Image: Louisiana Black Bear and Cubs
November 19, 2014

The bear species nicknamed “teddy” more than a century ago that inspired the iconic stuffed toy still popular today will likely survive at least another century, according to a new U.S. Geological Survey study. 

USGS
November 12, 2014

Groundwater contamination that was first detected in Chesterfield County in the early 2000s has been linked to historical agricultural land use, according to a recent U.S. Geological Survey study.

Image: Bent Sea Rod Bleaching
September 9, 2014

Late-summer water temperatures near the Florida Keys were warmer by nearly 2 degrees Fahrenheit in the last several decades compared to a century earlier, according to a new study by the U.S. Geological Survey.

USGS
August 6, 2014

June and July rainfall deficits continue to point toward abnormally dry to moderate drought conditions in the Commonwealth of Puerto Rico, according to the U.S. Geological Survey.

USGS
August 5, 2014

Vital coastal storm-tide information needed to help guide storm response efforts following major storms affecting New Jersey will be more accessible than ever due to a new monitoring network the U.S. Geological Survey is currently building. 

USGS
July 28, 2014

Streamflow in the eastern portions of the Missouri River watershed has increased over the past 52 years, whereas other parts have seen downward trends. 

USGS
July 28, 2014

Urban areas in the Southeastern United States will double in size by 2060 unless there are significant changes to land development, according to a new study by the Department of Interior’s Southeast Climate Science Center and North Carolina State University.

Burmese Python (Python molurus bivittatu
March 19, 2014

Invasive Burmese pythons in South Florida are able to find their way home even when moved far away from their capture locations, a finding that has implications for the spread of the species.

An invasive Burmese python in the Everglades.
March 19, 2014

Invasive Burmese pythons in South Florida are able to find their way home even when moved far away from their capture locations, a finding that has implications for the spread of the species.

USGS science for a changing world logo
February 27, 2014

The estimated tens of thousands of Burmese pythons now populating the Everglades present a low risk to people in the park, according to a new assessment byU.S. Geological Survey and National Park Service scientists.

USGS science for a changing world logo
February 6, 2014

A newly developed computer model holds the promise of helping scientists track and predict where oil will go after a spill, sometimes years later.