A5077577742- Peatlands and Wetlands Ecology
- Coastal wetland ecosystem dynamics
- Fire effects on ecosystems
- Hydrology and Watershed Management Studies
- Botany and Plant Ecology Studies
- Climate change and permafrost
- Hydrology and Sediment Transport Processes
- Soil and Water Nutrient Dynamics
- Land Use and Ecosystem Services
- Radioactive element chemistry and processing
- Water Quality and Resources Studies
- Environmental Conservation and Management
- Groundwater and Isotope Geochemistry
- Groundwater flow and contamination studies
- Soil erosion and sediment transport
- Geology and Paleoclimatology Research
- Soil and Unsaturated Flow
United States Fish and Wildlife Service
2014-2024
Colorado State University
2003
Abstract Peatland restoration in North America ( NA ) was initiated approximately 25 years ago on peat‐extracted bogs. Recent advances peatland have expanded the original concepts and methodology. Restoration efforts now include restoring peatlands from many diverse types of disturbances (e.g. roads, agriculture, grazing, erosion, forestry, petrol industry infrastructure impacts) occur a greater array fens swamps). Because are groundwater surface flow driven, techniques to restore hydrology...
Peatlands are a major reservoir of global soil carbon, yet account for just 3% land cover. Human impacts like draining can hinder the ability peatlands to sequester carbon and expose their soils fire under dry conditions. Estimating loss from peat fires be challenging due uncertainty about pre-fire surface elevations. This study uses multi-temporal LiDAR obtain pre- post-fire elevations estimate caused by 2011 Lateral West in Great Dismal Swamp National Wildlife Refuge, VA, USA. We also...
Abstract Peatland functions (e.g., carbon sequestration and flora diversity) are largely driven by soil moisture dynamics thus dependent on interactions between hydrologic regimes organic properties. Understanding these is particularly important in drained peatlands, where drier conditions may alter properties with feedbacks to water retention associated ecosystem functions. In this work, we focused the Great Dismal Swamp (GDS) Virginia, USA, a historically drained, temperate peatland...
Abstract The purpose of this study was to determine how drainage impacts carbon densities and recent rates (past 50 years) vertical accretion accumulation in southeastern forested peatlands. We compared these parameters drained maple‐gum (MAPL), Atlantic white cedar (CDR), pocosin (POC) communities the Great Dismal Swamp National Wildlife Refuge (GDS) Virginia/North Carolina an intact (undrained) CDR swamp Alligator River (AR) North Carolina. Peat cores were analyzed for bulk density,...
Smouldering fire vulnerability in organic-rich, wetland soils is regulated by hydrologic regimes over short (by antecedent wetness) and long (through influences on soil properties) timescales. An integrative understanding of these controls needed to inform predictions management reduce vulnerability. The Great Dismal Swamp, a drained peatland (Virginia North Carolina, USA), recently experienced large wildfires, motivating restoration efforts. To those efforts, we combined continuous water...
Abstract Peatland drainage may degrade system resilience to high intensity, soil‐consuming fires. Peat soil fires are unique in that they can smoulder vertically through the column, with a multitude of consequences including large carbon emissions, altered hydrology, and dramatic shifts vegetation communities. In this work we developed verified new method model peat burn depths readily available water level hydraulic property data at Great Dismal Swamp National Wildlife Refuge (VA NC, USA)....
First posted October 21, 2021 For additional information, contact: Center Director, Virginia and West Water Science CenterU.S. Geological Survey1730 East Parham RoadRichmond, VA 23228 The Great Dismal Swamp is a peat wetland in the Coastal Plain of southeastern northeastern North Carolina. Timber harvesting construction ditches to drain swamp facilitate are collectively implicated changes that altered forests, caused subsidence decomposition peat, increased risk fire. In response these...
First posted August 16, 2018 For additional information, contact: Director, Virgina Water Science Center U.S. Geological Survey1730 East Parham RoadRichmond, VA 23228 The Survey (USGS), in cooperation with the U.S Fish and Wildlife Service, has investigated hydrology of Great Dismal Swamp (Swamp) National Refuge (Refuge) Virginia North Carolina developed a three-dimensional numerical model to simulate groundwater surface-water hydrology. was MODFLOW-NWT, USGS flow modeling program,...
Abstract Peatland carbon storage is increasingly threatened by the combination of land‐use change and climate variability, though losses from changes that span centuries are difficult to quantify, particularly in systems where little undisturbed area remains. Here we use a vegetation change, fire history, calculations excess ash mass quantify loss Great Dismal Swamp National Wildlife Refuge (GDS NWR), USA, highly impacted oligotrophic temperate peat swamp. Our results indicate ditch...
The fragmentation and loss of southern California estuarine wetlands during the last century is a well documented phenomenon. Less clear are relatively recent changes in acreage since 1970s following passage several federal state laws aimed at protecting coastal (e.g. California's Coastal Act Conservancy Acts 1976 Federal Clean Water 1977). We updated 40 National Wetland Inventory (NWI) maps Coast, between Pt. Piedras Blancas Santa Monica, CA, using 1994 Digital Ortho Quarter Quads. Updated...