Regions

Southeast

Regions L2 Landing Page Tabs

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: 233
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

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

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
Geographical Trends in Ecosystem Function and Biodiversity of Wetlands as a Surrogate for Climate Change
Date Published: April 17, 2016

Geographical Trends in Ecosystem Function and Biodiversity of Wetlands as a Surrogate for Climate Change

Extreme drought and temperature in the southeastern United States may become more frequent in the future, and any  extreme shifts in climate condition are likely to have effects on wetland ecosystem function. USGS research predicts the effects of climate change by shifts in function and biodiversity across existing  climate gradients in baldcypress swamps. 

Filter Total Items: 172
Publication Thumbnail
Year Published: 2016

Radar and optical mapping of surge persistence and marsh dieback along the New Jersey Mid-Atlantic coast after Hurricane Sandy

This study combined a radar-based time series of Hurricane Sandy surge and estimated persistence with optical sensor-based marsh condition change to assess potential causal linkages of surge persistence and marsh condition change along the New Jersey Atlantic Ocean coast. Results based on processed TerraSAR-X and COSMO-SkyMed synthetic aperture...

Rangoonwala, Amina; Enwright, Nicholas M.; Ramsey, Elijah W.; Spruce, Joseph P.
Rangoonwala, A., Enwright, N.M., Ramsey, E.W., III, and Spruce, J.P., 2016, Radar and optical mapping of surge persistence and marsh dieback along the New Jersey Mid-Atlantic coast after Hurricane Sandy: International Journal of Remote Sensing, v. 37, no. 7, p 1692-1713, http://dx.doi.org/10.1080/01431161.2016.1163748.

Publication Thumbnail
Year Published: 2016

Hawksbill satellite-tracking case study: Implications for remigration interval and population estimates

Hawksbill sea turtles (Eretmochelys imbricata) are circumtropically distributed and listed as Critically Endangered by the IUCN (Meylan & Donnelly 1999; NMFS & USFWS 1993). To aid in population recovery and protection, the Hawksbill Recovery Plan identified the need to determine demographic information for hawksbills, such as distribution...

Sartain-Iverson, Autumn R.; Hart, Kristen M.; Fujisaki, Ikuko; Cherkiss, Michael S.; Pollock, Clayton; Lundgren, Ian; Hillis-Starr, Zandy
Sartain Iverson, A.R., Hart, K.M., Fujisaki, I., Cherkiss, M.S., Pollock, C., Lundgren, I., and Hillis-Starr, Z.-M., 2016, Hawksbill satellite-tracking case study: implications for remigration interval and population estimates: Marine Turtle Newsletter, v. 148, p. 2-7, http://www.seaturtle.org/mtn/archives/mtn148/mtn148-2.shtml.

Publication Thumbnail
Year Published: 2016

Growth, survival, longevity, and population size of the Big Mouth Cave salamander (Gyrinophilus palleucus necturoides) from the type locality in Grundy County, Tennessee, USA

Salamander species that live entirely in subterranean habitats have evolved adaptations that allow them to cope with perpetual darkness and limited energy resources. We conducted a 26-month mark–recapture study to better understand the individual growth and demography of a population of the Big Mouth Cave Salamander (Gyrinophilus palleucus...

Niemiller, Matthew L.; Glorioso, Brad M.; Fenolio, Dante B.; Reynolds, R. Graham; Taylor, Steven J.; Miller, Brian T.
Niemiller, M.L., Glorioso, B.M., Fenolio, D.B., Reynolds, R.G., Taylor, S.J., and Miller, B.T., 2016, Growth, survival, longevity, and population size of the Big Mouth Cave salamander (Gyrinophilus palleucus necturoides) from the type locality in Grundy County, Tennessee, USA: Copeia, v. 104, no. 1, p. 35-41, http://www.bioone.org/doi/full/10.1643/OT-14-197.

Publication Thumbnail
Year Published: 2016

Habitat selection by green turtles in a spatially heterogeneous benthic landscape in Dry Tortugas National Park, Florida

We examined habitat selection by green turtles Chelonia mydas at Dry Tortugas National Park, Florida, USA. We tracked 15 turtles (6 females and 9 males) using platform transmitter terminals (PTTs); 13 of these turtles were equipped with additional acoustic transmitters. Location data by PTTs comprised periods of 40 to 226 d in varying...

Fujisaki, Ikuko; Hart, Kristen M.; Sartain-Iverson, Autumn R.
Fujisaki, I., Hart, K.M., and Sartain-Iverson, A.R., 2016, Habitat selection by green turtles in a spatially heterogeneous benthic landscape in Dry Tortugas National Park, Florida: Aquatic Biology, v. 24, p. 185-199, http://dx.doi.org/10.3354/ab00647.

Publication Thumbnail
Year Published: 2016

Salinity and temperature tolerance of an emergent alien species, the Amazon fish Astronotus ocellatus

Astronotus ocellatus (oscar), is native to the Amazon basin and, although it has been introduced to many countries, little is known regarding its tolerances for salinity and temperature. In this report, we provide data on the tolerance of A. ocellatus to abrupt and gradual changes in salinity, its high and low temperature tolerance, and...

Gutierrel, Silvia M M; Schofield, Pamela J.; Prodocimo, Viviane
Gutierre, S.M.M., Schofield, P.J., and Prodocimo, V., 2016, Salinity and temperature tolerance of an emergent alien speicies, the Amazon fish Astonotus ocellatus: Hydrobiologia, v. 777, no. 1, p. 21-31, http://dx.doi.org/10.1007/s10750-016-2740-8.

Publication Thumbnail
Year Published: 2016

Contact heterogeneities in feral swine: implications for disease management and future research

Contact rates vary widely among individuals in socially structured wildlife populations. Understanding the interplay of factors responsible for this variation is essential for planning effective disease management. Feral swine (Sus scrofa) are a socially structured species which pose an increasing threat to livestock and human health, and little...

Pepin, Kim; Davis, Amy J.; Beasley, James; Boughton, Raoul; Campbell, Tyler; Cooper, Susan; Gaston, Wes; Hartley, Stephen B.; Kilgo, John C.; Wisely, Samantha; Wyckoff, Christy; VerCauteren, Kurt

Publication Thumbnail
Year Published: 2016

Wetland tree transpiration modified by river-floodplain connectivity

Hydrologic connectivity provisions water and nutrient subsidies to floodplain wetlands and may be particularly important in floodplains with seasonal water deficits through its effects on soil moisture. In this study, we measured sapflow in 26 trees of two dominant floodplain forest species (Celtis laevigata and Quercus lyrata) at two...

Allen, Scott T.; Krauss, Ken W.; Cochran, J. Wesley; King, Sammy L.; Keim, Richard F.
Allen, S.T., Krauss, K.W., Cochran, J.W., King, S.L., and Keim, R.F., 2016, Wetland tree transpiration modified by river-floodplain connectivity: Journal of Geophysical Research, v. 121, no. 3, p. 753-766, http://dx.doi.org/10.1002/2015JG003208.

Publication Thumbnail
Year Published: 2016

Differences in impacts of Hurricane Sandy on freshwater swamps on the Delmarva Peninsula, Mid−Atlantic Coast, USA

Hurricane wind and surge may have different influences on the subsequent composition of forests. During Hurricane Sandy, while damaging winds were highest near landfall in New Jersey, inundation occurred along the entire eastern seaboard from Georgia to Maine. In this study, a comparison of damage from salinity intrusion vs. wind/surge was...

Middleton, Beth A.
Middleton, B.A., 2016, Differences in impacts of Hurricane Sandy on freshwater swamps on the Delmarva Peninsula, Mid-Atlantic Coast, USA: Ecological Engineering, v. 87, p. 62-70, http://dx.doi.org/10.1016/j.ecoleng.2015.11.035.

Publication Thumbnail
Year Published: 2016

Diet of diamondback terrapins (Malaclemys terrapin) in subtropical mangrove habitats in South Florida

Unique among turtles as the only exclusively estuarine species, the diamondback terrapin’s (Malaclemys terrapin) life history predisposes it to impacts from humans both on land and in the near-shore environment. Terrapins are found in salt marshes and mangroves along the Atlantic and Gulf coasts from Massachusetts to Texas. Whereas previous...

Denton, Mathew J.; Hart, Kristen M.; Demopoulos, Amanda W.J.; Oleinik, Anton; Baldwin, John N.
Denton, M.J., Hart, K.M., Demopoulos, A.W.J., Oleinik, A., and Baldwin, J.D., 2016, Diet of diamondback terrapins (Malaclemys terrapin) in subtropical mangrove habitats in South Florida: Chelonian Conservation and Biology, v. 15, no. 1, p. 54-61, http://dx.doi.org/10.2744/CCB-1187.1.

Publication Thumbnail
Year Published: 2016

Twenty-six years of post-release monitoring of Florida manatees (Trichechus manatus latirostris): evaluation of a cooperative rehabilitation program

The rescue, rehabilitation, and release of Florida manatees (Trichechus manatus latirostris) into the wild has occurred since 1974; however, a comprehensive evaluation of the outcomes of the releases has never been conducted. Herein, we examined data for 136 Florida manatees that were rehabilitated and released with telemetry tags between 1988 and...

Adimey, Nicole M.; Ross, Monica; Hall, Madison; Reid, James P.; Barlas, Margie E.; Keith Diagne, Lucy W; Bonde, Robert K.
Adimey, N.M., Ross, M., Hall, M., Reid, J.P., Barlas, M.E., Keith Diagne, L.W., and Bonde, R.K., 2016, Twenty-six years of post-release monitoring of Florida manatees (Trichechus manatus latirostris): evaluation of a cooperative rehabilitation program: Aquatic Mammals, v. 42, no. 3, p. 376-391, http://dx.doi.org/10.1578/AM.42.3.2016.376.

Publication Thumbnail
Year Published: 2016

Dispersal and spatial heterogeneity: Single species

A recent result for a reaction-diffusion equation is that a population diffusing at any rate in an environment in which resources vary spatially will reach a higher total equilibrium biomass than the population in an environment in which the same total resources are distributed homogeneously. This has so far been proven by Lou for the case in...

DeAngelis, Donald L.; Ni, Wei-Ming; Zhang, Bo
DeAngelis, D., Ni, W.-M., and Zhang, B., 2016, Dispersal and spatial heterogeneity: single species: Journal of Mathematical Biology, v. 72, no. 1, p. 239-254, http://dx.doi.org/10.1007/s00285-015-0879-y.

Publication Thumbnail
Year Published: 2016

Functional integrity of freshwater forested wetlands, hydrologic alteration, and climate change

Climate change will challenge managers to balance the freshwater needs of humans and wetlands. The Intergovernmental Panel on Climate Change predicts that most regions of the world will be exposed to higher temperatures, CO2, and more erratic precipitation, with some regions likely to have alternating episodes of intense flooding and mega-drought...

Middleton, Beth A.; Souter, Nicholas J.;
Middleton, B.A., and Souter, N., 2016, Functional integrity of freshwater forested wetlands, hydrologic alteration, and climate change: Ecosystem Health and Sustainability, v. 2, no. 1, art. e01200, 18 p., http://dx.doi.org/10.1002/ehs2.1200.