Publications
Explore WARC's science publications.
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Status of scientific knowledge, recovery progress, and future research directions for the Gulf Sturgeon, Acipenser oxyrinchus desotoi Vladykov, 1955 Status of scientific knowledge, recovery progress, and future research directions for the Gulf Sturgeon, Acipenser oxyrinchus desotoi Vladykov, 1955
The Gulf Sturgeon, Acipenser oxyrinchus desotoi, is an anadromous species of Acipenseridae and native to North America. It currently inhabits and spawns in the upper reaches of seven natal rivers along the northern coast of the Gulf of Mexico from the Suwannee River, Florida, to the Pearl River, Louisiana, during spring to autumn. Next to the Alligator Gar (Atractosteus spatula), the...
Authors
Kenneth J. Sulak, F Parauka, W. Todd Slack, T Ruth, Michael T. Randall, K Luke, M. F Mette, M. E Price
Dispersal and spatial heterogeneity: Single species 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 which the reaction term has only one...
Authors
Donald L. DeAngelis, Wei-Ming Ni, Bo Zhang
Functional integrity of freshwater forested wetlands, hydrologic alteration, and climate change 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. Coastal areas will be exposed to more...
Authors
Beth A. Middleton, Nicholas J. Souter
A pilot study testing a natural and a synthetic Molluscicide for controlling invasive apple snails (Pomacea maculata) A pilot study testing a natural and a synthetic Molluscicide for controlling invasive apple snails (Pomacea maculata)
Pomacea maculata (formerly P. insularum), an apple snail native to South America, was discovered in Louisiana in 2008. These snails strip vegetation, reproduce at tremendous rates, and have reduced rice production and caused ecosystem changes in Asia. In this pilot study snails were exposed to two molluscicides, a tea (Camellia sinensis) seed derivative (TSD) or niclosamide monohydrate...
Authors
Heather M. Olivier, Jill A. Jenkins, Mark Berhow, Jacoby Carter
Adaptive harvest management for the Svalbard population of pink-footed geese: 2015 progress summary Adaptive harvest management for the Svalbard population of pink-footed geese: 2015 progress summary
This document describes progress to date on the development of an adaptive harvest management strategy for maintaining the Svalbard population of pink‐footed geese (Anser brachyrhynchus) near their agreed target level (60,000) by providing for sustainable harvests in Norway and Denmark. This report provides an assessment of the most recent monitoring information (1991-2014) and its...
Authors
Fred A. Johnson, Jesper Madsen
Do geographically isolated wetlands influence landscape functions? Do geographically isolated wetlands influence landscape functions?
Geographically isolated wetlands (GIWs), those surrounded by uplands, exchange materials, energy, and organisms with other elements in hydrological and habitat networks, contributing to landscape functions, such as flow generation, nutrient and sediment retention, and biodiversity support. GIWs constitute most of the wetlands in many North American landscapes, provide a...
Authors
Matthew J. Cohen, Irena F. Creed, Laurie C. Alexander, Nandita Basu, Aram J.K. Calhoun, Christopher Craft, Ellen D’Amico, Edward S. DeKeyser, Laurie Fowler, Heather E. Golden, James W. Jawitz, Peter Kalla, L. Katherine Kirkman, Charles R. Lane, Megan Lang, Scott G. Leibowitz, David Bruce Lewis, John Marton, Daniel L. McLaughlin, David M. Mushet, Hadas Raanan-Kiperwas, Mark C. Rains, Lora Smith, Susan C. Walls
Vectors of invasions in freshwater invertebrates and fishes Vectors of invasions in freshwater invertebrates and fishes
Without human assistance, the terrestrial environment and oceans represent barriers to the dispersal of freshwater aquatic organisms. The ability to overcome such barriers depends on the existence of anthropogenic vectors that can transport live organisms to new areas, and the species’ biology to survive the transportation and transplantation into the new environment (Johnson et al...
Authors
Pamela L. Fuller
What role do hurricanes play in sediment delivery to subsiding river deltas? What role do hurricanes play in sediment delivery to subsiding river deltas?
The Mississippi River Delta (MRD) has undergone tremendous land loss over the past century due to natural and anthropogenic influences, a fate shared by many river deltas globally. A globally unprecedented effort to restore and sustain the remaining subaerial portions of the delta is now underway, an endeavor that is expected to cost $50–100B over the next 50 yr. Success of this effort...
Authors
James E. Smith, Samuel J. Bentley, Gregg Snedden, Crawford White
Species and tissue type regulate long-term decomposition of brackish marsh plants grown under elevated CO2 conditions Species and tissue type regulate long-term decomposition of brackish marsh plants grown under elevated CO2 conditions
Organic matter accumulation, the net effect of plant production and decomposition, contributes to vertical soil accretion in coastal wetlands, thereby playing a key role in whether they keep pace with sea-level rise. Any factor that affects decomposition may affect wetland accretion, including atmospheric CO2 concentrations. Higher CO2 can influence decomposition rates by altering plant...
Authors
Joshua A Jones, Julia A Cherry, Karen L. McKee
Occupancy estimation for rare species using a spatially-adaptive sampling design Occupancy estimation for rare species using a spatially-adaptive sampling design
Authors
Krishna Pacifici, Brian J. Reich, Robert Dorazio, Michael J. Conroy
Coastwide Reference Monitoring System (CRMS) Vegetation Volume Index: An assessment tool for marsh habitat focused on the three-dimensional structure at CRMS vegetation monitoring stations Coastwide Reference Monitoring System (CRMS) Vegetation Volume Index: An assessment tool for marsh habitat focused on the three-dimensional structure at CRMS vegetation monitoring stations
A Vegetation Volume (VV) variable and Vegetation Volume Index (VVI) have been developed for the Coastwide Reference Monitoring System (CRMS). The VV is a measure of the amount of three-dimensional vegetative structure present at each CRMS site and is based on vegetation data collected annually. The VV uses 10 stations per CRMS site to quantify four vegetation layers: carpet, herbaceous...
Authors
William B. Wood, Jenneke M. Visser, Sarai C. Piazza, Leigh A. Sharp, Laura C. Hundy, Tommy E. McGinnis
Impact of Deepwater Horizon Spill on food supply to deep-sea benthos communities Impact of Deepwater Horizon Spill on food supply to deep-sea benthos communities
Deep-sea ecosystems encompass unique and often fragile communities that are sensitive to a variety of anthropogenic and natural impacts. After the 2010 Deepwater Horizon (DWH) oil spill, sampling efforts documented the acute impact of the spill on some deep-sea coral colonies. To investigate the impact of the DWH spill on quality and quantity of biomass delivered to the deep-sea, a suite...
Authors
Nancy G. Prouty, Pamela Swarzenski, Furu Mienis, Gerald Duineveld, Amanda W.J. Demopoulos, Steve W. Ross, Sandra Brooke