A5035552437- Coastal wetland ecosystem dynamics
- Coastal and Marine Dynamics
- Marine and coastal plant biology
- Ecology and Vegetation Dynamics Studies
- Geology and Paleoclimatology Research
- Coastal and Marine Management
- Aeolian processes and effects
- Plant responses to water stress
- Ocean Acidification Effects and Responses
- Coral and Marine Ecosystems Studies
- Peatlands and Wetlands Ecology
- Marine Biology and Ecology Research
- Biological Control of Invasive Species
- Isotope Analysis in Ecology
- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Species Distribution and Climate Change
- Insect and Arachnid Ecology and Behavior
- Indigenous Studies and Ecology
- Tropical and Extratropical Cyclones Research
- Climate Change and Environmental Impact
- Land Use and Ecosystem Services
- International Maritime Law Issues
- Remote Sensing and LiDAR Applications
- Pacific and Southeast Asian Studies
George Washington University
2016-2024
GW Medical Faculty Associates
2021-2024
Smithsonian Environmental Research Center
2013-2017
University of Maryland, College Park
2013-2016
Brown University
2008-2011
John Brown University
2010
Lamont-Doherty Earth Observatory
2009
Columbia University
2009
Abstract Saltwater intrusion is the leading edge of sea-level rise, preceding tidal inundation, but leaving its salty signature far inland. With climate change, saltwater shifting landward into regions that previously have not experienced or adapted to salinity, novel transitions in biogeochemistry, ecology, and human land uses. We explore these changes their implications for adaptation coastal ecosystems. Biogeochemical changes, including increases ionic strength, sulfidation,...
Abstract Anthropogenic climate change is predicted to cause widespread biodiversity loss due shifts in species’ distributions, but these predictions rarely incorporate ecological associations such as zonation. Here, we predict the decline of a diverse assemblage mid‐latitude salt marsh plants, based on an ecosystem warming experiment. In New England marshes, guild halophytic forbs occupies stressful, waterlogged pannes. At three sites, experimental < 4 °C led diversity declines pannes and...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 434:229-237 (2011) - DOI: https://doi.org/10.3354/meps09084 REVIEW Uncertain future of New England salt marshes Keryn B. Gedan1,2,*, Andrew H. Altieri1, Mark D. Bertness1 1Department and Evolutionary Biology, Brown University, Providence, Rhode Island 02912, USA 2Present address: Smithsonian Environmental...
Chapter Contributors Viewpoint Foreword (Daniel Pauly) Acknowledgments 1. Managing Human Legacies in a Changing Sea: An Introduction (John N. Kittinger, Louise K. Blight, Keryn B. Gedan, and Loren McClenachan) PART I. Recovering Endangered Species (Lead Section Editor: Blight) 2. What Recovery of Exploited Marine Animals Tells Us about Management Conservation (Heike Lotze) 3. Natural or Anthropogenic? Novel Community Reassembly after Historical Overharvest Pacific Coast Pinnipeds (Jon M....
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 399:253-259 (2010) - DOI: https://doi.org/10.3354/meps08331 Fiddler crab control of cordgrass primary production in sandy sediments Christine Holdredge*, Mark D. Bertness, Nicholas C. Herrmann, Keryn B. Gedan Department and Evolutionary Biology, Brown University, Providence, Rhode Island 02912, USA *Email:...
Variation in physical factors, such as slope, orientation, and wind exposure, shapes thermal conditions. substrate size is common many habitats, but its consequences for organisms are not well characterized. Larger substrates should remain more thermally stable act refuges associated during short, stressful periods midday temperature peaks or tidal exposure. In observations a transplant integration experiment, we found that larger rock stayed cooler facilitated greater survival of the...
Abstract Questions Sea level rise and saltwater intrusion are changing low‐lying coastal landscapes, converting agricultural land other upland habitats to tidal marsh. Abandoned, saline fields affected by a unique combination of environmental filters, those traditionally found in marsh — salinity flooding alongside cultivated lands high nutrient availability history disturbance. We asked how species composition functional trait compares traditional old natural ecotones, whether trends...
Abstract Recent studies have focused on the effect of large tropical cyclones (hurricanes) shore, neglecting role less intense but more frequent events. Here we analyze offshore storm Melissa groundwater data collected along North America Atlantic coast. Our meta‐analysis indicates that both level and specific conductivity significantly increased during Melissa, respectively reaching maximum values 1.09 m 25.2 mS/cm above pre‐storm levels. Time to recover levels was 10 times greater for...
Abstract Sea level rise and storm surges drive coastal forest retreat salt marsh expansion. Both salinization flooding control ecological zonation ecosystem transition in areas. Hydrological variables, if coupled with surveys, can explain the different stages of encroachment. In this research, long‐term data a host hydrological variables collected along transects from to inner were analyzed. Linear discriminant analysis (LDA) was used identify primary responsible for forest‐marsh gradient...
Abstract Many coastal habitat restoration projects are focused on restoring the population of a single foundation species to recover an entire ecological community. Estimates ecosystem services provided by project used justify, prioritize, and evaluate such projects. However, estimates may vastly under‐represent true provisioning, as we demonstrate here with example oyster reefs, often restored improve estuarine water quality. In brackish Chesapeake Bay, hooked mussel Ischadium recurvum can...
Expansion of shrubs has been observed in a number biomes and response to diverse global change drivers. Noting shrub expansion coastal forests affected by sea level rise, we began monitor populations transgressing loblolly pine forest Virginia. Forest study plots spanned gradient salinity progression toward ghost state, from high with relatively closed canopy, mid low forest, where there were few remaining live canopy trees. Shrubs the species Morella cerifera censused for 3 years 2019 2021....
Secondary succession is impacted by both biotic and abiotic forces, but their relative importance varies due to environmental drivers. Across estuarine salinity gradients, physical stress increases with salinity, stresses are greater at lower salinities. In southern New England tidal marshes spanning a landscape‐scale gradient, we experimentally examined the effects of consumer pressure mammalian herbivores on secondary in artificially created bare patches. Recovery was slower exposed...
The capacity for dispersal to promote or hinder species' responses global change remains a major question in ecology. One ecosystem experiencing rapid is the tidal marsh, which migrating inland response accelerated sea level rise. Few studies date have investigated ecological dynamics that impact this large-scale migration. Seed and persistence soil seed bank component can be strongly indicative of community trajectories. With mind, aim our study was characterize germinable across...