Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10483
Fish population dynamics in a seasonally varying wetland Fish population dynamics in a seasonally varying wetland
Small fishes in seasonally flooded environments such as the Everglades are capable of spreading into newly flooded areas and building up substantial biomass. Passive drift cannot account for the rapidity of observed population expansions. To test the reaction-diffusion mechanism for spread of the fish, we estimated their diffusion coefficient and applied a reaction-diffusion model. This...
Authors
Donald L. DeAngelis, Joel C. Trexler, Chris Cosner, Adam Obaza, Fred Jopp
Climate change effects on an endemic-rich edaphic flora: resurveying Robert H. Whittaker's Siskiyou sites (Oregon, USA) Climate change effects on an endemic-rich edaphic flora: resurveying Robert H. Whittaker's Siskiyou sites (Oregon, USA)
Species with relatively narrow niches, such as plants restricted (endemic) to particular soils, may be especially vulnerable to extinction under a changing climate due to the enhanced difficulty they face in migrating to suitable new sites. To test for community-level effects of climate change, and to compare such effects in a highly endemic-rich flora on unproductive serpentine soils vs...
Authors
Ellen Ingman Damschen, Susan Harrison, James B. Grace
Challenges and opportunities for integrating lake ecosystem modelling approaches Challenges and opportunities for integrating lake ecosystem modelling approaches
A large number and wide variety of lake ecosystem models have been developed and published during the past four decades. We identify two challenges for making further progress in this field. One such challenge is to avoid developing more models largely following the concept of others (‘reinventing the wheel’). The other challenge is to avoid focusing on only one type of model, while...
Authors
Wolf M. Mooij, Dennis Trolle, Erik Jeppesen, George Arhonditsis, Pavel V. Belolipetsky, Deonatus B.R. Chitamwebwa, Andrey G. Degermendzhy, Donald L. DeAngelis, Lisette N. De Senerpont Domis, Andrea S. Downing, J. Alex Elliott, Carlos Ruberto Fragoso, Ursula Gaedke, Svetlana N. Genova, Ramesh D. Gulati, Lars Hakanson, David P. Hamilton, Matthew R. Hipsey, Jochem ’t Hoen, Stephan Hulsmann, F. Hans Los, Vardit Makler-Pick, Thomas Petzoldt, Igor G. Prokopkin, Karsten Rinke, Sebastiaan A. Schep, Koji Tominaga, Anne A. Van Dam, Egbert H. Van Nes, Scott A. Wells, Jan H. Janse
Corals as climate recorders Corals as climate recorders
The U.S. Geological Survey (USGS) Coral Reef Ecosystem Studies (CREST) Project is analyzing corals from various sites in the Caribbean region, Dry Tortugas National Park, Biscayne National Park, other areas of the Florida Keys, and the Virgin Islands. The objective of this project is to develop records of past environmental change to better our understanding of climate variability. The...
Authors
Jennifer A. Flannery, Richard Z. Poore
EAARL Coastal Topography-Eastern Florida, Post-Hurricane Jeanne, 2004: First Surface EAARL Coastal Topography-Eastern Florida, Post-Hurricane Jeanne, 2004: First Surface
These remotely sensed, geographically referenced elevation measurements of lidar-derived first-surface (FS) topography datasets were produced collaboratively by the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL, and the National Aeronautics and Space Administration (NASA), Wallops Flight Facility, VA. This project provides highly...
Authors
Xan Fredericks, Amar Nayegandhi, J.M. Bonisteel-Cormier, C. W. Wright, A. H. Sallenger, J. C. Brock, E.S. Klipp, D.B. Nagle
Effects of ocean acidification and sea-level rise on coral reefs Effects of ocean acidification and sea-level rise on coral reefs
U.S. Geological Survey (USGS) scientists are developing comprehensive records of historical and modern coral reef growth and calcification rates relative to changing seawater chemistry resulting from increasing atmospheric CO2 from the pre-industrial period to the present. These records will provide the scientific foundation for predicting future impacts of ocean acidification and sea...
Authors
K. K. Yates, R.P. Moyer
Physiological response of wild dugongs (Dugong dugon) to out-of-water sampling for health assessment Physiological response of wild dugongs (Dugong dugon) to out-of-water sampling for health assessment
The dugong (Dugong dugon) is a vulnerable marine mammal with large populations living in urban Queensland waters. A mark-recapture program for wild dugongs has been ongoing in southern Queensland since 2001. This program has involved capture and in-water sampling of more than 700 dugongs where animals have been held at the water surface for 5 min to be gene-tagged, measured, and biopsied...
Authors
Janet M. Lanyon, Helen L. Sneath, Trevor Long, Robert K. Bonde
Detecting the spatial and temporal variability of chlorophyll-a concentration and total suspended solids in Apalachicola Bay, Florida using MODIS imagery Detecting the spatial and temporal variability of chlorophyll-a concentration and total suspended solids in Apalachicola Bay, Florida using MODIS imagery
Apalachicola Bay, Florida, accounts for 90% of Florida's and 10% of the nation's eastern oyster (Crassostrea virginica) harvesting. Chlorophyll-a concentration and total suspended solids (TSS) are two important water quality variables, among other environmental factors such as salinity, for eastern oyster production in Apalachicola Bay. In this research, we developed regression models of...
Authors
Hongqing Wang, C.M. Hladik, W. Huang, K. Milla, L. Edmiston, M.A. Harwell, J.F. Schalles
The use of historical charts and photographs in ecosystem restoration: Examples from the Everglades Historical Air Photo Project The use of historical charts and photographs in ecosystem restoration: Examples from the Everglades Historical Air Photo Project
No abstract available.
Authors
Thomas J. Smith, Ginger Tiling-Range, John Jones, Paul Nelson, Ann Foster, Karen Balentine
Analytical models for the groundwater tidal prism and associated benthic water flux Analytical models for the groundwater tidal prism and associated benthic water flux
The groundwater tidal prism is defined as the volume of water that inundates a porous medium, forced by one tidal oscillation in surface water. The pressure gradient that generates the prism acts on the subterranean estuary. Analytical models for the groundwater tidal prism and associated benthic flux are presented. The prism and flux are shown to be directly proportional to porosity...
Authors
Jeffrey N. King, Ashish J. Mehta, Robert G. Dean
A new parameterization for estimating co‐occurrence of interacting species A new parameterization for estimating co‐occurrence of interacting species
Models currently used to estimate patterns of species co‐occurrence while accounting for errors in detection of species can be difficult to fit when the effects of covariates on species occurrence probabilities are included. The source of the estimation problems is the particular parameterization used to specify species co‐occurrence probability. We develop a new parameterization for...
Authors
J. Hardin Waddle, Robert M. Dorazio, Susan C. Walls, Kenneth G. Rice, Jeff Beauchamp, Melinda J. Schuman, Frank J. Mazzotti
Inter-nesting habitat-use patterns of loggerhead sea turtles: Enhancing satellite tracking with benthic mapping Inter-nesting habitat-use patterns of loggerhead sea turtles: Enhancing satellite tracking with benthic mapping
The loggerhead sea turtle Caretta caretta faces declining nest numbers and bycatches from commercial longline fishing in the southeastern USA. Understanding spatial and temporal habitat-use patterns of these turtles, especially reproductive females in the neritic zone, is critical for guiding management decisions. To assess marine turtle habitat use within the Dry Tortugas National Park...
Authors
Kristen M. Hart, David G. Zawada, Ikuko Fujisaki, Barbara H. Lidz