Glenn Guntenspergen, Ph.D.
Glenn is a Research Ecologist at the Eastern Ecological Science Center in Laurel, MD.
Science and Products
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Greenhouse gas fluxes from salt marshes exposed to chronic nutrient enrichment Greenhouse gas fluxes from salt marshes exposed to chronic nutrient enrichment
We assessed the impact of nutrient additions on greenhouse gas fluxes using dark static chambers in a microtidal and a macrotidal marsh along the coast of New Brunswick, Canada approximately monthly over a year. Both were experimentally fertilized for six years with varying levels of N and P. For unfertilized, N and NPK treatments, average yearly CO2 emissions (which represent only...
Authors
Gail L. Chmura, Lisa Kellman, Lee van Ardenne, Glenn R. Guntenspergen
Impacts of climate change on land-use and wetland productivity in the Prairie Pothole Region of North America Impacts of climate change on land-use and wetland productivity in the Prairie Pothole Region of North America
Wetland productivity in the Prairie Pothole Region (PPR) of North America is closely linked to climate. A warmer and drier climate, as predicted, will negatively affect the productivity of PPR wetlands and the services they provide. The effect of climate change on wetland productivity, however, will not only depend on natural processes (e.g., evapotranspiration), but also on human...
Authors
Benjamin S. Rashford, Richard M. Adams, Jun Wu, Richard A. Voldseth, Glenn R. Guntenspergen, Brett Werner, W. Carter Johnson
Non-linear responses of glaciated prairie wetlands to climate warming Non-linear responses of glaciated prairie wetlands to climate warming
The response of ecosystems to climate warming is likely to include threshold events when small changes in key environmental drivers produce large changes in an ecosystem. Wetlands of the Prairie Pothole Region (PPR) are especially sensitive to climate variability, yet the possibility that functional changes may occur more rapidly with warming than expected has not been examined or...
Authors
W. Carter Johnson, Brett Werner, Glenn R. Guntenspergen
The vulnerability of Indo-Pacific mangrove forests to sea-level rise The vulnerability of Indo-Pacific mangrove forests to sea-level rise
Sea-level rise can threaten the long-term sustainability of coastal communities and valuable ecosystems such as coral reefs, salt marshes and mangroves. Mangrove forests have the capacity to keep pace with sea-level rise and to avoid inundation through vertical accretion of sediments, which allows them to maintain wetland soil elevations suitable for plant growth. The Indo-Pacific region...
Authors
Catherine E. Lovelock, Donald R. Cahoon, Daniel A. Friess, Glenn R. Guntenspergen, Ken W. Krauss, Ruth Reef, Kerrylee Rogers, Megan L. Saunders, Frida Sidik, Andrew Swales, Neil Saintilan, Le Xuan Thuyen, Tran Triet
Sediment transport-based metrics of wetland stability Sediment transport-based metrics of wetland stability
Despite the importance of sediment availability on wetland stability, vulnerability assessments seldom consider spatiotemporal variability of sediment transport. Models predict that the maximum rate of sea level rise a marsh can survive is proportional to suspended sediment concentration (SSC) and accretion. In contrast, we find that SSC and accretion are higher in an unstable marsh than...
Authors
Neil K. Ganju, Matthew L. Kirwan, Patrick J. Dickhudt, Glenn R. Guntenspergen, Donald R. Cahoon, Kevin D. Kroeger
Response of plant productivity to experimental flooding in a stable and a submerging marsh Response of plant productivity to experimental flooding in a stable and a submerging marsh
Recent models of tidal marsh evolution rely largely on the premise that plants are most productive at an optimal flooding regime that occurs when soil elevations are somewhere between mean sea level and mean high tide. Here, we use 4 years of manipulative “marsh organ” flooding experiments to test the generality of this conceptual framework and to examine how the optimal flooding...
Authors
Matthew L. Kirwan, Glenn R. Guntenspergen
Science and Products
Filter Total Items: 19
No Result Found
Filter Total Items: 133
Greenhouse gas fluxes from salt marshes exposed to chronic nutrient enrichment Greenhouse gas fluxes from salt marshes exposed to chronic nutrient enrichment
We assessed the impact of nutrient additions on greenhouse gas fluxes using dark static chambers in a microtidal and a macrotidal marsh along the coast of New Brunswick, Canada approximately monthly over a year. Both were experimentally fertilized for six years with varying levels of N and P. For unfertilized, N and NPK treatments, average yearly CO2 emissions (which represent only...
Authors
Gail L. Chmura, Lisa Kellman, Lee van Ardenne, Glenn R. Guntenspergen
Impacts of climate change on land-use and wetland productivity in the Prairie Pothole Region of North America Impacts of climate change on land-use and wetland productivity in the Prairie Pothole Region of North America
Wetland productivity in the Prairie Pothole Region (PPR) of North America is closely linked to climate. A warmer and drier climate, as predicted, will negatively affect the productivity of PPR wetlands and the services they provide. The effect of climate change on wetland productivity, however, will not only depend on natural processes (e.g., evapotranspiration), but also on human...
Authors
Benjamin S. Rashford, Richard M. Adams, Jun Wu, Richard A. Voldseth, Glenn R. Guntenspergen, Brett Werner, W. Carter Johnson
Non-linear responses of glaciated prairie wetlands to climate warming Non-linear responses of glaciated prairie wetlands to climate warming
The response of ecosystems to climate warming is likely to include threshold events when small changes in key environmental drivers produce large changes in an ecosystem. Wetlands of the Prairie Pothole Region (PPR) are especially sensitive to climate variability, yet the possibility that functional changes may occur more rapidly with warming than expected has not been examined or...
Authors
W. Carter Johnson, Brett Werner, Glenn R. Guntenspergen
The vulnerability of Indo-Pacific mangrove forests to sea-level rise The vulnerability of Indo-Pacific mangrove forests to sea-level rise
Sea-level rise can threaten the long-term sustainability of coastal communities and valuable ecosystems such as coral reefs, salt marshes and mangroves. Mangrove forests have the capacity to keep pace with sea-level rise and to avoid inundation through vertical accretion of sediments, which allows them to maintain wetland soil elevations suitable for plant growth. The Indo-Pacific region...
Authors
Catherine E. Lovelock, Donald R. Cahoon, Daniel A. Friess, Glenn R. Guntenspergen, Ken W. Krauss, Ruth Reef, Kerrylee Rogers, Megan L. Saunders, Frida Sidik, Andrew Swales, Neil Saintilan, Le Xuan Thuyen, Tran Triet
Sediment transport-based metrics of wetland stability Sediment transport-based metrics of wetland stability
Despite the importance of sediment availability on wetland stability, vulnerability assessments seldom consider spatiotemporal variability of sediment transport. Models predict that the maximum rate of sea level rise a marsh can survive is proportional to suspended sediment concentration (SSC) and accretion. In contrast, we find that SSC and accretion are higher in an unstable marsh than...
Authors
Neil K. Ganju, Matthew L. Kirwan, Patrick J. Dickhudt, Glenn R. Guntenspergen, Donald R. Cahoon, Kevin D. Kroeger
Response of plant productivity to experimental flooding in a stable and a submerging marsh Response of plant productivity to experimental flooding in a stable and a submerging marsh
Recent models of tidal marsh evolution rely largely on the premise that plants are most productive at an optimal flooding regime that occurs when soil elevations are somewhere between mean sea level and mean high tide. Here, we use 4 years of manipulative “marsh organ” flooding experiments to test the generality of this conceptual framework and to examine how the optimal flooding...
Authors
Matthew L. Kirwan, Glenn R. Guntenspergen