Kevin D Kroeger, PhD
Kevin Kroeger has studied coastal ecosystems since 1990, with focus on a range of topics including fluxes and biogeochemistry of nitrogen in groundwater discharge to estuaries and wetlands, estuarine water quality, and carbon and greenhouse gas cycling and fluxes in coastal wetlands.
Kroeger is lead of the Biogeochemical Processes group at Woods Hole Coastal and Marine Science Center, and lead of a new project titled: Biogeochemical Drivers of Wetland Persistence and Feedbacks on Coastal Hazards The objectives of this Project are to provide guidance to federal (National Park Service, Fish & Wildlife Service, Army Corp of Engineers), state, local and private land owners and managers regarding stability and persistence of coastal wetlands under a range of hydrological management conditions and changing environmental conditions. Tidal wetlands provide critical services to society, including protection of infrastructure from coastal hazards, and habitat provision for economically important species. A large fraction of U.S. tidal wetlands, however, has been lost or degraded during recent centuries due to human actions, largely related to development and utilization of coastal lands. Feedbacks and interactions among natural and anthropogenic drivers have altered the stability and persistence of coastal wetlands. Decisions regarding hydrological management can alter the balance of organic matter production, retention and preservation, and thus management actions can either promote wetland persistence and resilience, or cause catastrophic loss of elevation, putting coastal infrastructure at increased risk of flooding or storm damage. This project impacts wetland management decisions. The contiguous U.S. has close to 2 million hectares of estuarine and marine wetlands. Nearly all of that area is under some level of management, with the federal government being the largest single manager. Land managers at FWS and NPS, and flood managers at ACOE, must make decisions regarding whether to spend substantial funds to maintain, repair and enhance water control structures under increasing rates of sea level change, or alternatively whether to reduce or remove hydrological management, to restore managed wetlands to more natural hydrology and enhance the capability of wetlands to build elevation over time, and to migrate landward. Society needs guidance and predictions regarding the result of those decisions for continued elevation gain, migration, and ongoing persistence of the wetlands.
Professional Experience
Present: Research Chemist, USGS Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA
2004-2006: Mendenhall Fellow, US Geological Survey Geologic Division, St Petersburg, FL
2003-2004: Postdoctoral Scholar, Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA
1997-2003: Research Fellow and Teaching Fellow, Bos
Education and Certifications
PhD Boston University Marine Program (Biogeochemistry)
M.S. University of Connecticut (Marine Science)
B.A. University of Tennessee (Ecology)
Affiliations and Memberships*
Contributing Author: 2nd State of the Carbon Cycle Report (SOCCR-2), Chapter 15 Tidal Wetlands and Estuaries
Lead, USGS Woods Hole Coastal Biogeochemical Processes Project
Participant, 2017 EPA AFOL
Science and Products
Molecular signature of organic nitrogen in septic-impacted groundwater
Limited denitrification in glacial deposit aquifers having thick unsaturated zones (Long Island, USA)
Continuous resistivity profiling data from Great South Bay, Long Island, New York
Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York
Continuous resistivity profiling data from the Corsica River Estuary, Maryland
Short-term nitrogen additions can shift a coastal wetland from a sink to a source of N2O
Use of pharmaceuticals and pesticides to constrain nutrient sources in coastal groundwater of northwestern Long Island, New York, USA
Nitrogen biogeochemistry of submarine groundwater discharge
Identifying nutrient sources to three lagoons at Ofu and Olosega, American Samoa using δ15N of benthic macroalgae
Submarine groundwater discharge to Tampa Bay: Nutrient fluxes and biogeochemistry of the coastal aquifer
Ra and Rn isotopes as natural tracers of submarine groundwater discharge in Tampa Bay, Florida
Submarine ground-water discharge: nutrient loading and nitrogen transformations
Science and Products
Molecular signature of organic nitrogen in septic-impacted groundwater
Limited denitrification in glacial deposit aquifers having thick unsaturated zones (Long Island, USA)
Continuous resistivity profiling data from Great South Bay, Long Island, New York
Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York
Continuous resistivity profiling data from the Corsica River Estuary, Maryland
Short-term nitrogen additions can shift a coastal wetland from a sink to a source of N2O
Use of pharmaceuticals and pesticides to constrain nutrient sources in coastal groundwater of northwestern Long Island, New York, USA
Nitrogen biogeochemistry of submarine groundwater discharge
Identifying nutrient sources to three lagoons at Ofu and Olosega, American Samoa using δ15N of benthic macroalgae
Submarine groundwater discharge to Tampa Bay: Nutrient fluxes and biogeochemistry of the coastal aquifer
Ra and Rn isotopes as natural tracers of submarine groundwater discharge in Tampa Bay, Florida
Submarine ground-water discharge: nutrient loading and nitrogen transformations
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government