Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10383
Assessing microplastics contamination in unviable loggerhead sea turtle eggs Assessing microplastics contamination in unviable loggerhead sea turtle eggs
Sea turtles, in comparison with marine mammals, sea birds, and fishes, are the most affected by microplastics in terms of number of individuals impacted and concentration within each organism. The ubiquitous nature and persistence of microplastics in the environment further compromises sea turtles as many species are currently vulnerable, endangered, or critically endangered. The...
Authors
Lindsay F. Curl, Samantha A. Hurst, Christopher M. Pomory, Margaret Lamont, Alexis M. Janosik
Evaluating water-quality conditions in the mainstem and tidal reaches of the Merrimack River in Massachusetts, June to September 2020 Evaluating water-quality conditions in the mainstem and tidal reaches of the Merrimack River in Massachusetts, June to September 2020
In summer and early fall (June to September) 2020, water-quality data were collected at 13 stations along the mainstem of the Merrimack River and into the Merrimack River estuary. The data are allocated among three different datasets: discrete water sample data, discrete vertical profile data, and continuous data. The collective purpose of these datasets is to enable assessment of the...
Authors
Kaitlin L. Laabs, Casey Beaudoin, Jason R. Sorenson, Alex Bissell
Two-dimensional inverse energy cascade in a laboratory surf zone for varying wave directional spread Two-dimensional inverse energy cascade in a laboratory surf zone for varying wave directional spread
Surfzone eddies enhance the dispersion and transport of contaminants, bacteria, and larvae across the nearshore, altering coastal water quality and ecosystem health. During directionally spread wave conditions, vertical vortices (horizontal eddies) are injected near the ends of breaking crests. Energy associated with these eddies may be transferred to larger-scale, low-frequency...
Authors
Christine Baker, Melissa Moulton, C Chris Chickadel, Emma Nuss, Margaret L. Palmsten, Katherine L. Brodie
Forecasting water levels using machine (deep) learning to complement numerical modelling in the southern Everglades, USA Forecasting water levels using machine (deep) learning to complement numerical modelling in the southern Everglades, USA
Water level is an important guide for water resource management and wetland ecosystems, defining one of the most basic processes in hydrology. This research seeks to investigate the possibility of complementing numerical modeling with a Machine Learning (ML) model to forecast daily water levels in the southern Everglades in Florida, USA. An exact analytical solution to water level may...
Authors
Courtney S Forde, Biswa Bhattacharya, Dimitri Solomatine, Eric Swain, Nicholas Aumen
A new method for bioassessment of ecosystems with complex communities and environmental gradients A new method for bioassessment of ecosystems with complex communities and environmental gradients
Bioassessment of complex and heterogeneous ecosystems is a challenge when there are multiple, strong, natural environmental gradients; unknown, or spatially varying, mixtures of stressors; and large numbers of taxa with unknown responses to both the environmental gradients and the stressors. Current methods of bioassessment are not designed for use under this set of constraints. To...
Authors
Donald Schoolmaster, Valerie A. Partridge
PCB concentrations in riparian spiders (Tetragnathidae) consistently reflect concentrations in water and aquatic macroinvertebrates, but not sediment: Analysis of a seven-year field study PCB concentrations in riparian spiders (Tetragnathidae) consistently reflect concentrations in water and aquatic macroinvertebrates, but not sediment: Analysis of a seven-year field study
Tetragnathid spiders have been used as sentinels to study the biotransport of contaminants between aquatic and terrestrial environments because a significant proportion of their diet consists of adult aquatic insects. A key knowledge gap in assessing tetragnathid spiders as sentinels is understanding the consistency of the year-to-year relationship between contaminant concentrations in...
Authors
Ryan R. Otter, Marc A. Mills, Ken M. Fritz, James M. Lazorchak, Dalon P. White, Gale B. Beaubien, David Walters
Elevated temperature and nutrients lead to increased N2O emissions from salt marsh soils from cold and warm climates Elevated temperature and nutrients lead to increased N2O emissions from salt marsh soils from cold and warm climates
Salt marshes can attenuate nutrient pollution and store large amounts of ‘blue carbon’ in their soils, however, the value of sequestered carbon may be partially offset by nitrous oxide (N2O) emissions. Global climate and land use changes result in higher temperatures and inputs of reactive nitrogen (Nr) into coastal zones. Here, we investigated the combined effects of elevated...
Authors
Sophie A. Comer-Warner, Sami Ullah, Arunabha Dey, Camille Stagg, Tracy Elsey-Quirk, Christopher M. Swarzenski, Fotis Sgouridis, Stefan Krause, Gail L. Chmura
Identifying invasive species threats, pathways, and impacts to improve biosecurity Identifying invasive species threats, pathways, and impacts to improve biosecurity
Managing invasive species with prevention and early-detection strategies can avert severe ecological and economic impacts. Horizon scanning, an evidence-based process combining risk screening and consensus building to identify threats, has become a valuable tool for prioritizing invasive species management and prevention. We assembled a working group of experts from academic, government...
Authors
Deah Lieurance, Susan Canavan, Donald C. Behringer, Amy E. Kendig, Carey R. Minteer, Lindsey S. Reisinger, Christina M. Romagosa, S. Luke Flory, Julie L. Lockwood, Patti J. Anderson, Shirley M. Baker, Jamie Bojko, Kristen E. Bowers, Kim Canavan, Kelly Carruthers, Wesley M. Daniel, Doria R. Gordon, Jeffrey E. Hill, Jennifer G. Howeth, Basil V. Iannone, Lucas Jennings, Lyn A. Gettys, Eutychus M. Kariuki, John M. Kunzer, H. Dail Laughinghouse, Nicholas E. Mandrak, Sara McCann, Tolulope Morawo, Cayla R. Morningstar, Matthew Neilson, Tabitha Petri, Ian A. Pfingsten, Robert Reed, Linda J. Walters, Christian Wanamaker
Assessment of prerestoration water quality in the Herring River to support adaptive management at the Cape Cod National Seashore Assessment of prerestoration water quality in the Herring River to support adaptive management at the Cape Cod National Seashore
In 2020 and 2021, the U.S. Geological Survey, Cape Cod National Seashore of the National Park Service, and Friends of Herring River cooperated to assess nutrient and suspended sediment concentrations across the ocean-estuary boundary at a dike on the Herring River on Chequessett Neck Road in Wellfleet, Massachusetts, that has restricted saltwater inputs by regulating water inflow through...
Authors
Thomas G. Huntington
Relative effectiveness of a radionuclide (210Pb), surface elevation table (SET), and LiDAR at monitoring mangrove forest surface elevation change Relative effectiveness of a radionuclide (210Pb), surface elevation table (SET), and LiDAR at monitoring mangrove forest surface elevation change
Sea-level rise (SLR) is one of the greatest future threats to mangrove forests. Mangroves have kept up with or paced past SLR by maintaining their forest floor elevation relative to sea level through root growth, sedimentation, and peat development. Monitoring surface elevation change (SEC) or accretion rates allows us to understand mangrove response to SLR and prioritizes resilient...
Authors
Richard A. MacKenzie, Ken Krauss, Nicole Cormier, Eugene Eperiam, Jan van Aardt, Ali Rouzbeh Kargar, Jessica Grow, J. Val Klump
Ecological benefits of integrative weed management of Melaleuca quinquenervia in Big Cypress National Preserve Ecological benefits of integrative weed management of Melaleuca quinquenervia in Big Cypress National Preserve
The southern tip of North America coalesces into one of the world’s largest freshwater wetlands, the Everglades, Florida, USA. Though this region is much like an island, home to high biodiversity and endemism, it is also the site of a century of development and associated landscape-scale species invasions. Melaleuca quinquenervia (hereafter melaleuca), a tree native to tropical Australia...
Authors
Melissa C. Smith, Paul Julien, Don DeAngelis, Bo Zhang
Bobcat occupancy, tree islands, and invasive Burmese pythons in an Everglades conservation area Bobcat occupancy, tree islands, and invasive Burmese pythons in an Everglades conservation area
Bobcats (Lynx rufus) are terrestrial mammals that also inhabit tree islands (i.e., topographically elevated patches of forested land) embedded in the subtropical Everglades wetlands, which serve as a dry refuge habitat during the wet season in this region of Florida, USA. The Comprehensive Everglades Restoration Plan seeks to restore Everglades water flow to pre-drainage conditions, but...
Authors
Katherine M. Buckman, Laura D’Acunto, Stephanie Romanach, Rachel M. Taylor, Nathan J. Dorn