Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 9969
The shifting saltmarsh-mangrove ecotone in Australasia and the Americas
Mangroves and saltmarshes coexist in the intertidal wetlands of many temperate and subtropical coastlines. In these settings, mangroves may be close to physiological limits of tolerance in relation to a range of environmental variables, including temperature, salinity, aridity, and inundation frequency. Changes in the distribution of mangrove and saltmarsh might thereby provide insights into the e
Authors
Neil Saintilan, Kerrylee Rogers, Karen L. McKee
Recent outer-shelf foraminiferal assemblages on the Carnarvon Ramp and Northwestern Shelf of Western Australia
The carbonate sediments of the Western Australian shelf in the Indian Ocean host diverse assemblages of benthic foraminifera. Environments of the shelf are dominated by the southward-flowing Leeuwin Current, which impacts near-surface circulation and influences biogeographic ranges of Indo-Pacific warm-water foraminifera. Analyses of outer ramp to upper slope sediments (127–264 m water depth) at f
Authors
Christian Haller, Pamela Hallock, Albert C. Hine, Christopher G. Smith
Spatially referenced models of streamflow and nitrogen, phosphorus, and suspended-sediment loads in the southeastern United States
Spatially Referenced Regression On Watershed attributes (SPARROW) models were applied to describe and estimate mean-annual streamflow and transport of total nitrogen (TN), total phosphorus (TP), and suspended sediment (SS) in streams and delivered to coastal waters of the southeastern United States on the basis of inputs and management practices centered near 2012, the base year of the model. Prev
Authors
Anne B. Hoos, Victor L. Roland
Groundwater recharge estimates for Maine using a Soil-Water-Balance model—25-year average, range, and uncertainty, 1991 to 2015
To address the lack of information on the spatial and temporal variability of recharge to groundwater systems in Maine, a study was initiated in cooperation with the Maine Geological Survey to use the U.S. Geological Survey Soil-Water-Balance model to evaluate annual average potential recharge across the State over a 25-year period from 1991 to 2015. The Maine Soil-Water-Balance model was calibrat
Authors
Martha G. Nielsen, Stephen M. Westenbroek
Louisiana Coastal Zone sediment characterization; comparison of sediment grain sizes for samples collected in 2008 and 2015–2016 from the western Chenier plain to the Chandeleur Islands, Louisiana—Louisiana Barrier Island Comprehensive Monitoring (BICM) P
Repeated sampling and grain-size analysis of surficial sediments along the sandy shorelines of Louisiana is necessary to characterize coastal-zone sediment properties and evaluate sediment transport patterns within the nearshore environments. In 2008, and again in 2015 and 2016, sediment grab samples were collected along the shorelines of the western Chenier plain, the Isles Dernieres (Raccoon, Wh
Authors
Stephen T. Bosse, James G. Flocks, Julie Bernier, Ioannis Y. Georgiou, Mark A. Kulp, Michael Brown
Evidence for conservative transport of dissolved organic carbon in major river basins in the Gulf of Maine Watershed
Transport and fate of dissolved organic carbon (DOC) in rivers are important aspects of the carbon cycle and the critical linkage between terrestrial, aquatic, and marine systems. Recent studies have quantified fluvial export to the marine environment in many systems, but in-stream losses of DOC are poorly constrained. This study compares DOC yields (kg C/ha) between the area-weighted averages of
Authors
Thomas G. Huntington, Collin S. Roesler, George R. Aiken
Sturgeon in the Sacramento-San Joaquin watershed: new insights to support conservation and management
The goal of a day-long symposium on March 3, 2015, Sturgeon in the Sacramento–San Joaquin Watershed: New Insights to Support Conservation and Management, was to present new information about the physiology, behavior, and ecology of the green (Acipenser medirostris) and white sturgeon (Acipenser transmontanus) to help guide enhanced management and conservation efforts within the Sacramento–San Joaq
Authors
A Peter Klimley, Eric D Chapman, J. J. Cech Jr, Dennis E. Cocherell, Nann A. Fangue, Marty Gingras, Zachary Jackson, Emily A Miller, Ethan A. Mora, Jamilynn B Poletto, Andrea M Schreier, Alicia Seesholtz, Kenneth J. Sulak, Michael J. Thomas, David Woodbury, Megan T. Wyman
Establishment of a vertical control network along the St. Croix River in New Brunswick and Maine
Consistent elevations at stable benchmarks, referenced to a common datum, are important for measuring and comparing water levels and for computing flows throughout a watershed. Elevations are presented for 38 control points within the St. Croix River watershed, mostly along the main stem of the St. Croix River. Vertical control points are located at 7 dams, 3 Environment Canada (EC) lake monitorin
Authors
Pamela J. Lombard
Basin-scale model for predicting marsh edge erosion
Recent attempts to relate marsh edge retreat rate to wave power have met varying levels of success. Schwimmer (2001) correlated wave power to marsh boundary retreat rates over a five-year period along sites within Rehoboth Bay, Delaware, USA. Marani et al. (2011) derived a linear relationship between volumetric retreat rate and mean wave power density using Buckingham’s theorem of dimensional anal
Authors
Navid H. Jafari, Qin J. Chen, Brady Couvillion, Cody L. Johnson, Thomas Everett
Landscape conservation design for enhancing the adaptive capacity of coastal wetlands in the face of sea-level rise and coastal development
Coastal wetlands provide many valuable benefits to people and wildlife, including critical habitat, improved water quality, reduced flooding impacts, and protected coastlines. However, in the 21st century, accelerated sea-level rise and coastal development are expected to greatly alter coastal landscapes across the globe. The future of coastal wetlands is uncertain, challenging coastal environment
Authors
Michael J. Osland, Sinead Borchert, Nicholas Enwright
Interior Least Tern sandbar nesting habitat measurements from Landsat Thematic Mapper imagery
Sandbars of large sand-bedded rivers of the central United States serve important ecological functions to many species, including the endangered Interior Least Tern (Sternula antillarum, ILT). The ILT is a colonial bird that feeds on fish and nests primarily on riverine sandbars during its annual breeding season of around May through July, depending on region. During this time, ILTs require bare s
Authors
Edward A. Bulliner, Caroline M. Elliott, Robert B. Jacobson, Casey Lott
Hyperspectral remote sensing of wetland vegetation
Chapter 11 by Ramsey and Rangoonwala provides an overview of how hyperspectral imaging (HSI) advances the mapping of coastal wetlands that comprise a unique variety of plant species, forms, and associations. Each description begins by seeking to uncover the relationship between canopy hyperspectral reflectance and one or more of the aggregated biophysical properties of the wetland canopy: leaf spe
Authors
Elijah Ramsey, Amina Rangoonwala