Kevin D Kroeger, PhD (Former Employee)
Science and Products
Environmental Geochemistry
Coastal Environmental Geochemistry research at the Woods Hole Coastal and Marine Science Center spans multiple ecosystems and topics, including coastal wetlands, aquifers, and estuaries, with the goal of providing data and guidance to federal, state, local, and private land owners and managers on these vital ecosystems.
Advancing understanding of ecosystem responses to climate change with warming experiments: what we have learned and what is unknown?
Advancing our mechanistic understanding of ecosystem responses to climate change is critical to improve ecological theories, develop predictive models to simulate ecosystem processes, and inform sound policies to manage ecosystems and human activities. Manipulation of temperature in the field, or the “ecosystem warming experiment,” has proved to be a powerful tool to understand ecosystem...
Filter Total Items: 23
Static chamber gas fluxes and carbon and nitrogen isotope content of age-dated sediment cores from a Phragmites wetland in Sage Lot Pond, Massachusetts, 2013-2015 Static chamber gas fluxes and carbon and nitrogen isotope content of age-dated sediment cores from a Phragmites wetland in Sage Lot Pond, Massachusetts, 2013-2015
Coastal wetlands are major global carbon sinks, however, they are heterogeneous and dynamic ecosystems. To characterize spatial and temporal variability in a New England salt marsh, static chamber measurements of greenhouse gas (GHG) fluxes were compared among major plant-defined zones (high marsh dominated by Distichlis spicata and a zone of invasive Phragmites australis) during 2013...
Geochemical data supporting analysis of fate and transport of nitrogen in the near shore groundwater and subterranean estuary near East Falmouth, Massachusetts, 2015 Geochemical data supporting analysis of fate and transport of nitrogen in the near shore groundwater and subterranean estuary near East Falmouth, Massachusetts, 2015
Geochemical data were obtained to investigate the fate and transport of nitrogen in a subterranean estuary near East Falmouth, Massachusetts. The goal of this investigation was to assess nitrogen attenuation in the aquifer under the Eel River Estuary and the adjacent peninsula that was densely populated with residences having septic systems and legacy cesspool inputs of inorganic...
Collection, analysis, and age-dating of sediment cores from Herring River wetlands and other nearby wetlands in Wellfleet, Massachusetts, 2015-17 Collection, analysis, and age-dating of sediment cores from Herring River wetlands and other nearby wetlands in Wellfleet, Massachusetts, 2015-17
The Herring River estuary in Wellfleet, Cape Cod, Massachusetts, has been tidally restricted for more than a century by a dike constructed near the mouth of the river. Upstream from the dike, the tidal restriction has caused the conversion of salt marsh wetlands to various other ecosystems including impounded freshwater marshes, flooded shrub land, drained forested upland, and brackish...
Collection, Analysis, and Age-Dating of Sediment Cores from Salt Marshes, Rhode Island, 2016 Collection, Analysis, and Age-Dating of Sediment Cores from Salt Marshes, Rhode Island, 2016
The accretion history of fringing salt marshes in Narragansett Bay, Rhode Island, was reconstructed from sediment cores. Age models, based on excess lead-210 and cesium-137 radionuclide analysis, were constructed to evaluate how vertical accretion and carbon burial rates have changed during the past century. The Constant Rate of Supply (CRS) age model was used to date six cores collected...
Collection, analysis, and age-dating of sediment cores from natural and restored salt marshes on Cape Cod, Massachusetts, 2015-16 Collection, analysis, and age-dating of sediment cores from natural and restored salt marshes on Cape Cod, Massachusetts, 2015-16
Nineteen sediment cores were collected from five salt marshes on the northern shore of Cape Cod where previously restricted tidal exchange was restored to part of the marshes. Cores were collected in duplicate from two locations within each marsh complex: one upstream and one downstream from the former tidal restriction (typically caused by an undersized culvert or a berm). The unaltered...
Collection, analysis, and age-dating of sediment cores from mangrove and salt marsh ecosystems in Tampa Bay, Florida, 2015 Collection, analysis, and age-dating of sediment cores from mangrove and salt marsh ecosystems in Tampa Bay, Florida, 2015
Coastal wetlands in Tampa Bay, Florida, are important ecosystems that deliver a variety of ecosystem services. Key to ecosystem functioning is wetland response to sea-level rise through accumulation of mineral and organic sediment. The organic sediment within coastal wetlands is composed of carbon sequestered over the time scale of the wetland’s existence. This study was conducted to...
Filter Total Items: 71
Hydrodynamic and salinity tesponse to tidal restoration in the Herring River Estuary, MA, considering present and future sea levels Hydrodynamic and salinity tesponse to tidal restoration in the Herring River Estuary, MA, considering present and future sea levels
Coastal salt marshes are crucial ecosystems that provide habitat for a variety of species, improve water quality, and play a major role in the global carbon cycle. However, many salt marshes have been severely damaged by human activities such as diking and draining for urban development. Recently, there has been a noticeable shift toward the prioritization of coastal marsh restoration to...
Authors
Kasra Naseri, Michelle Hummel, Kevin Befus, Timothy Smith, Meagan Eagle, Kevin Kroeger
The Coastal Carbon Library and Atlas: Open source soil data and tools supporting blue carbon research and policy The Coastal Carbon Library and Atlas: Open source soil data and tools supporting blue carbon research and policy
Quantifying carbon fluxes into and out of coastal soils is critical to meeting greenhouse gas reduction and coastal resiliency goals. Numerous ‘blue carbon’ studies have generated, or benefitted from, synthetic datasets. However, the community those efforts inspired does not have a centralized, standardized database of disaggregated data used to estimate carbon stocks and fluxes. In this...
Authors
James R. Holmquist, David Klinges, Michael Lonneman, Jaxine Wolfe, Brandon Boyd, Meagan Eagle, Jonathan Sanderman, Katherine Todd-Brown, Lauren Brown, E. Belshe, Samantha Chapman, Ron Corstanje, Christopher Janousek, James Morris, Gregory Noe, Andre Rovai, Amanda Spivak, Megan Vahsen, Lisamarie Windham-Myers, Kevin Kroeger, Patrick Megonigal
Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes
Mangroves and saltmarshes are biogeochemical hotspots storing carbon in sediments and in the ocean following lateral carbon export (outwelling). Coastal seawater pH is modified by both uptake of anthropogenic carbon dioxide and natural biogeochemical processes, e.g., wetland inputs. Here, we investigate how mangroves and saltmarshes influence coastal carbonate chemistry and quantify the
Authors
Gloria Reithmaier, Alex Cabral, Anirban Akhand, Matthew Bogard, Alberto V. Borges, Steven Bouillon, David Burdige, Mitchel Call, Nengwang Chen, Xiaogang Chen, Cotovicz, Meagan Eagle, Erik Kristensen, Kevin Kroeger, Zeyang Lu, Damien Maher, Lucas Perez-Llorens, Raghab Ray, Pierre Taillardat, Joseph Tamborski, Robert Upstill-Goddard, Faming Wang, Zhaohui Aleck Wang, Kai Xiao, Yvonne Yau, Isaac Santos
Practical guide to measuring wetland carbon pools and fluxes Practical guide to measuring wetland carbon pools and fluxes
Wetlands cover a small portion of the world, but have disproportionate influence on global carbon (C) sequestration, carbon dioxide and methane emissions, and aquatic C fluxes. However, the underlying biogeochemical processes that affect wetland C pools and fluxes are complex and dynamic, making measurements of wetland C challenging. Over decades of research, many observational...
Authors
Sheel Bansal, Irena F. Creed, Brian Tangen, Scott Bridgham, Ankur Desai, Ken Krauss, Scott Neubauer, Gregory Noe, Donald Rosenberry, Carl Trettin, Kimberly Wickland, Scott Allen, Ariane Arias-Ortiz, Anna Armitage, Dennis Baldocchi, Kakoli Banerjee, David Bastviken, Peter Berg, Matthew Bogard, Alex Chow, William Conner, Christopher Craft, Courtney Creamer, Tonya Delsontro, Jamie Duberstein, Meagan Eagle, M. Fennessey, Sarah Finkelstein, Mathias Goeckede, Sabine Grunwald, Meghan Halibisky, Ellen Herbert, Mohammad Jahangir, Olivia Johnson, Miriam Jones, Jeffrey Kelleway, Sarah Knox, Kevin Kroeger, Kevin Kuehn, David Lobb, Amanda Loder, Shizhou Ma, Damien Maher, Gavin McNicol, Jacob Meier, Beth Middleton, Christopher Mills, Purbasha Mistry, Abhijith Mitra, Courtney Mobilian, Amanda Nahlik, Sue Newman, Jessica O’Connell, Patty Oikawa, Max Post van der Burg, Charles Schutte, Chanchung Song, Camille Stagg, Jessica Turner, Rodrigo Vargas, Mark Waldrop, Markus Wallin, Zhaohui Wang, Eric Ward, Debra A. Willard, Stephanie Yarwood, Xiaoyan Zhu
By
Ecosystems Mission Area, Water Resources Mission Area, Ecosystems Land Change Science Program, Florence Bascom Geoscience Center, Geology, Minerals, Energy, and Geophysics Science Center, Geosciences and Environmental Change Science Center, Northern Prairie Wildlife Research Center, Wetland and Aquatic Research Center , Woods Hole Coastal and Marine Science Center
Geologic carbon management options for the North Atlantic-Appalachian Region Geologic carbon management options for the North Atlantic-Appalachian Region
Introduction The U.S. Geological Survey (USGS) North Atlantic-Appalachian Region is developing the regionwide capacity to provide timely science support for decision-makers attempting to enhance carbon removal, sequestration, and emissions mitigation to meet national atmospheric carbon reduction goals. The U.S. Environmental Protection Agency (EPA) reported that in 2021, the fourteen...
Authors
Peter D. Warwick, Madalyn S. Blondes, Sean T. Brennan, Steven M. Cahan, C. Karacan, Kevin Kroeger, Matthew D. Merrill
Mapping methane reduction potential of tidal wetland restoration in the United States Mapping methane reduction potential of tidal wetland restoration in the United States
Coastal wetlands can emit excess methane in cases where they are impounded and artificially freshened by structures that impede tidal exchange. We provide a new assessment of coastal methane reduction opportunities for the contiguous United States by combining multiple publicly available map layers, reassessing greenhouse gas emissions datasets, and applying scenarios informed by...
Authors
James Holmquist, Meagan Eagle, Rebecca Molinari, Sydney Nick, Liana Stachowicz, Kevin Kroeger
Science and Products
Environmental Geochemistry
Coastal Environmental Geochemistry research at the Woods Hole Coastal and Marine Science Center spans multiple ecosystems and topics, including coastal wetlands, aquifers, and estuaries, with the goal of providing data and guidance to federal, state, local, and private land owners and managers on these vital ecosystems.
Advancing understanding of ecosystem responses to climate change with warming experiments: what we have learned and what is unknown?
Advancing our mechanistic understanding of ecosystem responses to climate change is critical to improve ecological theories, develop predictive models to simulate ecosystem processes, and inform sound policies to manage ecosystems and human activities. Manipulation of temperature in the field, or the “ecosystem warming experiment,” has proved to be a powerful tool to understand ecosystem...
Filter Total Items: 23
Static chamber gas fluxes and carbon and nitrogen isotope content of age-dated sediment cores from a Phragmites wetland in Sage Lot Pond, Massachusetts, 2013-2015 Static chamber gas fluxes and carbon and nitrogen isotope content of age-dated sediment cores from a Phragmites wetland in Sage Lot Pond, Massachusetts, 2013-2015
Coastal wetlands are major global carbon sinks, however, they are heterogeneous and dynamic ecosystems. To characterize spatial and temporal variability in a New England salt marsh, static chamber measurements of greenhouse gas (GHG) fluxes were compared among major plant-defined zones (high marsh dominated by Distichlis spicata and a zone of invasive Phragmites australis) during 2013...
Geochemical data supporting analysis of fate and transport of nitrogen in the near shore groundwater and subterranean estuary near East Falmouth, Massachusetts, 2015 Geochemical data supporting analysis of fate and transport of nitrogen in the near shore groundwater and subterranean estuary near East Falmouth, Massachusetts, 2015
Geochemical data were obtained to investigate the fate and transport of nitrogen in a subterranean estuary near East Falmouth, Massachusetts. The goal of this investigation was to assess nitrogen attenuation in the aquifer under the Eel River Estuary and the adjacent peninsula that was densely populated with residences having septic systems and legacy cesspool inputs of inorganic...
Collection, analysis, and age-dating of sediment cores from Herring River wetlands and other nearby wetlands in Wellfleet, Massachusetts, 2015-17 Collection, analysis, and age-dating of sediment cores from Herring River wetlands and other nearby wetlands in Wellfleet, Massachusetts, 2015-17
The Herring River estuary in Wellfleet, Cape Cod, Massachusetts, has been tidally restricted for more than a century by a dike constructed near the mouth of the river. Upstream from the dike, the tidal restriction has caused the conversion of salt marsh wetlands to various other ecosystems including impounded freshwater marshes, flooded shrub land, drained forested upland, and brackish...
Collection, Analysis, and Age-Dating of Sediment Cores from Salt Marshes, Rhode Island, 2016 Collection, Analysis, and Age-Dating of Sediment Cores from Salt Marshes, Rhode Island, 2016
The accretion history of fringing salt marshes in Narragansett Bay, Rhode Island, was reconstructed from sediment cores. Age models, based on excess lead-210 and cesium-137 radionuclide analysis, were constructed to evaluate how vertical accretion and carbon burial rates have changed during the past century. The Constant Rate of Supply (CRS) age model was used to date six cores collected...
Collection, analysis, and age-dating of sediment cores from natural and restored salt marshes on Cape Cod, Massachusetts, 2015-16 Collection, analysis, and age-dating of sediment cores from natural and restored salt marshes on Cape Cod, Massachusetts, 2015-16
Nineteen sediment cores were collected from five salt marshes on the northern shore of Cape Cod where previously restricted tidal exchange was restored to part of the marshes. Cores were collected in duplicate from two locations within each marsh complex: one upstream and one downstream from the former tidal restriction (typically caused by an undersized culvert or a berm). The unaltered...
Collection, analysis, and age-dating of sediment cores from mangrove and salt marsh ecosystems in Tampa Bay, Florida, 2015 Collection, analysis, and age-dating of sediment cores from mangrove and salt marsh ecosystems in Tampa Bay, Florida, 2015
Coastal wetlands in Tampa Bay, Florida, are important ecosystems that deliver a variety of ecosystem services. Key to ecosystem functioning is wetland response to sea-level rise through accumulation of mineral and organic sediment. The organic sediment within coastal wetlands is composed of carbon sequestered over the time scale of the wetland’s existence. This study was conducted to...
Filter Total Items: 71
Hydrodynamic and salinity tesponse to tidal restoration in the Herring River Estuary, MA, considering present and future sea levels Hydrodynamic and salinity tesponse to tidal restoration in the Herring River Estuary, MA, considering present and future sea levels
Coastal salt marshes are crucial ecosystems that provide habitat for a variety of species, improve water quality, and play a major role in the global carbon cycle. However, many salt marshes have been severely damaged by human activities such as diking and draining for urban development. Recently, there has been a noticeable shift toward the prioritization of coastal marsh restoration to...
Authors
Kasra Naseri, Michelle Hummel, Kevin Befus, Timothy Smith, Meagan Eagle, Kevin Kroeger
The Coastal Carbon Library and Atlas: Open source soil data and tools supporting blue carbon research and policy The Coastal Carbon Library and Atlas: Open source soil data and tools supporting blue carbon research and policy
Quantifying carbon fluxes into and out of coastal soils is critical to meeting greenhouse gas reduction and coastal resiliency goals. Numerous ‘blue carbon’ studies have generated, or benefitted from, synthetic datasets. However, the community those efforts inspired does not have a centralized, standardized database of disaggregated data used to estimate carbon stocks and fluxes. In this...
Authors
James R. Holmquist, David Klinges, Michael Lonneman, Jaxine Wolfe, Brandon Boyd, Meagan Eagle, Jonathan Sanderman, Katherine Todd-Brown, Lauren Brown, E. Belshe, Samantha Chapman, Ron Corstanje, Christopher Janousek, James Morris, Gregory Noe, Andre Rovai, Amanda Spivak, Megan Vahsen, Lisamarie Windham-Myers, Kevin Kroeger, Patrick Megonigal
Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes Carbonate chemistry and carbon sequestration driven by inorganic carbon outwelling from mangroves and saltmarshes
Mangroves and saltmarshes are biogeochemical hotspots storing carbon in sediments and in the ocean following lateral carbon export (outwelling). Coastal seawater pH is modified by both uptake of anthropogenic carbon dioxide and natural biogeochemical processes, e.g., wetland inputs. Here, we investigate how mangroves and saltmarshes influence coastal carbonate chemistry and quantify the
Authors
Gloria Reithmaier, Alex Cabral, Anirban Akhand, Matthew Bogard, Alberto V. Borges, Steven Bouillon, David Burdige, Mitchel Call, Nengwang Chen, Xiaogang Chen, Cotovicz, Meagan Eagle, Erik Kristensen, Kevin Kroeger, Zeyang Lu, Damien Maher, Lucas Perez-Llorens, Raghab Ray, Pierre Taillardat, Joseph Tamborski, Robert Upstill-Goddard, Faming Wang, Zhaohui Aleck Wang, Kai Xiao, Yvonne Yau, Isaac Santos
Practical guide to measuring wetland carbon pools and fluxes Practical guide to measuring wetland carbon pools and fluxes
Wetlands cover a small portion of the world, but have disproportionate influence on global carbon (C) sequestration, carbon dioxide and methane emissions, and aquatic C fluxes. However, the underlying biogeochemical processes that affect wetland C pools and fluxes are complex and dynamic, making measurements of wetland C challenging. Over decades of research, many observational...
Authors
Sheel Bansal, Irena F. Creed, Brian Tangen, Scott Bridgham, Ankur Desai, Ken Krauss, Scott Neubauer, Gregory Noe, Donald Rosenberry, Carl Trettin, Kimberly Wickland, Scott Allen, Ariane Arias-Ortiz, Anna Armitage, Dennis Baldocchi, Kakoli Banerjee, David Bastviken, Peter Berg, Matthew Bogard, Alex Chow, William Conner, Christopher Craft, Courtney Creamer, Tonya Delsontro, Jamie Duberstein, Meagan Eagle, M. Fennessey, Sarah Finkelstein, Mathias Goeckede, Sabine Grunwald, Meghan Halibisky, Ellen Herbert, Mohammad Jahangir, Olivia Johnson, Miriam Jones, Jeffrey Kelleway, Sarah Knox, Kevin Kroeger, Kevin Kuehn, David Lobb, Amanda Loder, Shizhou Ma, Damien Maher, Gavin McNicol, Jacob Meier, Beth Middleton, Christopher Mills, Purbasha Mistry, Abhijith Mitra, Courtney Mobilian, Amanda Nahlik, Sue Newman, Jessica O’Connell, Patty Oikawa, Max Post van der Burg, Charles Schutte, Chanchung Song, Camille Stagg, Jessica Turner, Rodrigo Vargas, Mark Waldrop, Markus Wallin, Zhaohui Wang, Eric Ward, Debra A. Willard, Stephanie Yarwood, Xiaoyan Zhu
By
Ecosystems Mission Area, Water Resources Mission Area, Ecosystems Land Change Science Program, Florence Bascom Geoscience Center, Geology, Minerals, Energy, and Geophysics Science Center, Geosciences and Environmental Change Science Center, Northern Prairie Wildlife Research Center, Wetland and Aquatic Research Center , Woods Hole Coastal and Marine Science Center
Geologic carbon management options for the North Atlantic-Appalachian Region Geologic carbon management options for the North Atlantic-Appalachian Region
Introduction The U.S. Geological Survey (USGS) North Atlantic-Appalachian Region is developing the regionwide capacity to provide timely science support for decision-makers attempting to enhance carbon removal, sequestration, and emissions mitigation to meet national atmospheric carbon reduction goals. The U.S. Environmental Protection Agency (EPA) reported that in 2021, the fourteen...
Authors
Peter D. Warwick, Madalyn S. Blondes, Sean T. Brennan, Steven M. Cahan, C. Karacan, Kevin Kroeger, Matthew D. Merrill
Mapping methane reduction potential of tidal wetland restoration in the United States Mapping methane reduction potential of tidal wetland restoration in the United States
Coastal wetlands can emit excess methane in cases where they are impounded and artificially freshened by structures that impede tidal exchange. We provide a new assessment of coastal methane reduction opportunities for the contiguous United States by combining multiple publicly available map layers, reassessing greenhouse gas emissions datasets, and applying scenarios informed by...
Authors
James Holmquist, Meagan Eagle, Rebecca Molinari, Sydney Nick, Liana Stachowicz, Kevin Kroeger
*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