Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 9967
Effectiveness of a distance sampling from roads program for white-tailed deer in the National Capital Region parks
We evaluated the effectiveness of a distance sampling from roads program for estimating population sizes of white-tailed deer (Odocoileus virginianus) from 2001 to 2015 in parks of the National Capital Region (NCR), National Parks Service. Distance sampling is a method for estimating the density of organisms using a distribution of distances to observed individuals. Re-analysis of survey data for
Authors
Nicholas S. Green, Mark L. Wildhaber, Janice L. Albers
Sea state from single optical images: A methodology to derive wind-generated ocean waves from cameras, drones and satellites
Sea state is a key variable in ocean and coastal dynamics. The sea state is either sparsely
measured by wave buoys and satellites or modelled over large scales. Only a few attempts have been devoted to sea state measurements covering a large domain; in particular its estimation from optical images. With optical technologies becoming omnipresent, optical images offer incomparable spatial resolution
Authors
Rafael Almar, Erwin W. J. Bergsma, Patrico A. Catalan, Rodrigo Cienfuegos, Leandro Suarez, Felipe Lucero, Alexandre Nicolae Lerma, Franck Desmazes, Eleonora Perugini, Margaret Louise Palmsten, Chris Chickadel
Sap flow evidence of chilling injury and recovery in mangroves following a spring cold spell
Mangroves are periodically influenced in negative ways by non-freezing temperatures across their global sub-tropical range. However, physiological and morphological evidence of chilling influences to non-freezing chilling events has not been measured in field settings. In this study, we measured sap flow (Js) during such a chilling (but non-freezing) event in southern China and documented the redu
Authors
Xiaoxuan Gu, Chen Yang, Hewei Zhao, Naxu Hu, Ken Krauss, Chuanyuan Deng, Luzhen Chen
Relative influence of antecedent topography and sea-level rise on barrier-island migration
The response of barrier islands to sea-level rise is modulated by combinations of coastal processes, eco-geomorphic feedbacks, and structural controls, such as antecedent topography. Interactions among these drivers can lead to complex and non-linear changes in island morphology and transitions between migrational, erosional, or progradational states. This study seeks to constrain the morphologic
Authors
Justin L. Shawler, Daniel J. Ciarletta, Jennifer E. Connell, Bianca Q. Boggs, Jorge Lorenzo-Trueba, Christopher J. Hein
Home ranges and movements of two diamondback terrapins (Malaclemys terrapin macrospilota) in northwest Florida
The diamondback terrapin (Malaclemys terrapin) is a small estuarine turtle distributed along the Atlantic and Gulf Coasts of the USA that is threatened by drowning in crab pots, road mortality, exploitation in the pet trade, and habitat loss. Little is known about the movement patterns and home ranges of these turtles, particularly along the U.S. Gulf of Mexico coast. Satellite tags were deployed
Authors
Margaret Lamont, Darren Johnson, Daniel J. Catizone
Piloting urban ecosystem accounting for the United States
In this study, we develop urban ecosystem accounts in the U.S., using the System of Environmental-Economic Accounting Experimental Ecosystem Accounting (SEEA EEA) framework. Most ecosystem accounts focus on regional and national scales, which are appropriate for many ecosystem services. However, ecosystems provide substantial services in cities, improving quality of life and contributing to resili
Authors
Mehdi Heris, Kenneth J. Bagstad, Charles Rhodes, Austin Troy, Ariane Middel, Kristina G. Hopkins, John Matuszak
Non-native Asian swamp eel, Monopterus albus/javanensis (Zuiew, 1973/Lacepede, 1800), responses to low temperatures
Asian swamp eel, Monopterus albus/javanensis [Zuiew, 1973/Lacepede 1800], has been established in the southeastern USA since at least 1994, yet little is known about its ability to survive low winter temperatures. We use standard thermal methodologies to quantify low temperature responses and provide a detailed description of swamp eel reactions to cold temperatures. When exposed to chronic temper
Authors
Ryan K. Saylor, Pam Schofield, Wayne A Bennett
Reconstructing population dynamics of a threatened marine mammal using multiple data sets
Models of marine mammal population dynamics have been used extensively to predict abundance. A less common application of these models is to reconstruct historical population dynamics, filling in gaps in observation data by integrating information from multiple sources. We developed an integrated population model for the Florida manatee (Trichechus manatus latirostris) to reconstruct its populatio
Authors
J. Hostetler, Julien Martin, M. Kosempa, H. Edwards, K. Rood, S. Barton, Michael C. Runge
Joint species distribution models of Everglades wading birds to inform restoration planning
Restoration of the Florida Everglades, a substantial wetland ecosystem within the United States, is one of the largest ongoing restoration projects in the world. Decision-makers and managers within the Everglades ecosystem rely on ecological models forecasting indicator wildlife response to changes in the management of water flows within the system. One such indicator of ecosystem health, the pres
Authors
Laura D'Acunto, Leonard G. Pearlstine, Stephanie Romanach
In vitro effects-based method and water quality screening model for use in pre- and post-distribution treated waters
Recent urban public water supply contamination events emphasize the importance of screening treated drinking water quality after distribution. In vitro bioassays, when run concurrently with analytical chemistry methods, are effective tools to evaluating the efficacy of water treatment processes and water quality. We tested 49 water samples representing the Chicago Department of Water Management se
Authors
Elizabeth Medlock-Kakaley, Mary C. Cardon, Nicola Evans, Luke R. Iwanowicz, Joshua M. Allen, Elizabeth Wagner, Katherine Bokenkamp, Susan D Richardson, Michael J Plewa, Paul M. Bradley, Kristin M. Romanok, Dana W. Kolpin, Justin M. Conley, L. Earl Jr. Gray, Phillip C. Hartig, Vickie S. Wilson
Sentinel-2 and WorldView-3 atmospheric correction and signal normalization based on ground-truth spectroradiometric measurements
Remote sensing satellite Earth Observing Systems (EOS) provide a variety of products for monitoring Earth surface processes at varying spatial and spectral resolutions. Combining information from high and medium spatial resolution images is valuable for monitoring ground cover and vegetation status in cropland, grassland, forests, and other natural settings. However, coupling information from diff
Authors
J.L. Pancorbo, Brian T. Lamb, Miguel Quemada, W. Dean Hively, I. Gonzalez-Fernandez, Inigo Molina
The history of surface-elevation paradigms in mangrove biogeomorphology
Positioned in the intertidal zone, mangrove forests are a key model ecosystem with which to observe and test biogeomorphological concepts. Understanding how mangroves interact with their intertidal environment, particularly tidal inundation, is important if we are to assess their vulnerability or resilience to accelerated sea-level rise. While various biogeomorphological processes are now well stu
Authors
Daniel A. Friess, Karen L. McKee