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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Feedbacks between inundation, root production, and shoot growth in a rapidly submerging brackish marsh
1. Ecogeomorphic feedbacks between mineral sediment deposition and above-ground plant growth are thought to have dominated the evolution of many coastal ecosystems and landforms. However, land-use-related reductions in sediment delivery rates to estuaries world-wide suggest that these above-ground feedbacks may not apply in some of the world's most vulnerable coastal landscapes.
2. To understand t
Authors
Matthew L. Kirwan, Glenn R. Guntenspergen
Numerical models of salt marsh evolution: ecological, geomorphic, and climatic factors
Salt marshes are delicate landforms at the boundary between the sea and land. These ecosystems support a diverse biota that modifies the erosive characteristics of the substrate and mediates sediment transport processes. Here we present a broad overview of recent numerical models that quantify the formation and evolution of salt marshes under different physical and ecological drivers. In particula
Authors
Sergio Fagherazzi, Matthew L. Kirwan, Simon M. Mudd, Glenn R. Guntenspergen, Stijn Temmerman, Andrea D'Alpaos, Johan van de Koppel, John Rybczyk, Enrique Reyes, Chris Craft, Jonathan Clough
Numerical models of salt marsh evolution: Ecological, geomorphic, and climatic factors
Salt marshes are delicate landforms at the boundary between the sea and land. These ecosystems support a diverse biota that modifies the erosive characteristics of the substrate and mediates sediment transport processes. Here we present a broad overview of recent numerical models that quantify the formation and evolution of salt marshes under different physical and ecological drivers. In particula
Authors
S. Fagherazzi, M. L. Kirwan, S.M. Mudd, G.R. Guntenspergen, S. Temmerman, A. D'Alpaos, J. Van De Koppel, J.M. Rybczyk, E. Reyes, C. Craft, J. Clough
Concluding remarks: The way forward for urban ecology
No abstract available.
Authors
J. Niemela, J.H. Breuste, Thomas Elmqvist, Glenn R. Guntenspergen, P. James, N.E. McIntyre
Introduction; Concluding remarks
No abstract available.
Authors
Jari Niemela, Jiirgen Breuste, Thomas Elmqvist, Glenn R. Guntenspergen, Philip James, Nancy McIntyre
The greenhouse gas flux and potential global warming feedbacks of a northern macrotidal and microtidal salt marsh
Conversion of wetlands by drainage for agriculture or other anthropogenic activities could have a negative or positive feedback to global warming (GWF). We suggest that a major predictor of the GWF is salinity of the wetland soil (a proxy for available sulfate), a factor often ignored in other studies. We assess the radiative balance of two northern salt marshes with average soil salinities > 20 p
Authors
Gail L. Chmura, Lisa Kellman, Glenn R. Guntenspergen
Influence of tidal range on the stability of coastal marshland
Early comparisons between rates of vertical accretion and sea level rise across marshes in different tidal ranges inspired a paradigm that marshes in high tidal range environments are more resilient to sea level rise than marshes in low tidal range environments. We use field‐based observations to propose a relationship between vegetation growth and tidal range and to adapt two numerical models of
Authors
Matthew L. Kirwan, Glenn R. Guntenspergen
Climate change, sea-level rise, and coastal wetlands
No abstract available.
Authors
Donald R. Cahoon, G.R. Guntenspergen
Prairie wetland complexes as landscape functional units in a changing climate
The wetland complex is the functional ecological unit of the prairie pothole region (PPR) of central North America. Diverse complexes of wetlands contribute high spatial and temporal environmental heterogeneity, productivity, and biodiversity to these glaciated prairie landscapes. Climatewarming simulations using the new model WETLANDSCAPE (WLS) project major reductions in water volume, shortening
Authors
W. Carter Johnson, Brett Werner, Glenn R. Guntenspergen, Richard A. Voldseth, Bruce Millett, David E. Naugle, Mirela Tulbure, Rosemary W.H. Carroll, John Tracy, Craig Olawsky
Limits on the adaptability of coastal marshes to rising sea level
Assumptions of a static landscape inspire predictions that about half of the world's coastal wetlands will submerge during this century in response to sea-level acceleration. In contrast, we use simulations from five numerical models to quantify the conditions under which ecogeomorphic feedbacks allow coastal wetlands to adapt to projected changes in sea level. In contrast to previous sea-level as
Authors
Matthew L. Kirwan, Glenn R. Guntenspergen, Andrea D'Alpaos, James T. Morris, Simon M. Mudd, Stijn Temmerman
Conceptual hierarchical modeling to describe wetland plant community organization
Using multivariate analysis, we created a hierarchical modeling process that describes how differently-scaled environmental factors interact to affect wetland-scale plant community organization in a system of small, isolated wetlands on Mount Desert Island, Maine. We followed the procedure: 1) delineate wetland groups using cluster analysis, 2) identify differently scaled environmental gradients u
Authors
A.M. Little, G.R. Guntenspergen, T. F. H. Allen
Climate trends of the North American prairie pothole region 1906-2000
The Prairie Pothole Region (PPR) is unique to North America. Its millions of wetlands and abundant ecosystem goods and services are highly sensitive to wide variations of temperature and precipitation in time and space characteristic of a strongly continental climate. Precipitation and temperature gradients across the PPR are orthogonal to each other. Precipitation nearly triples from west to east
Authors
B. Millett, W.C. Johnson, G. Guntenspergen
Science and Products
Filter Total Items: 14
No Result Found
Filter Total Items: 119
Feedbacks between inundation, root production, and shoot growth in a rapidly submerging brackish marsh
1. Ecogeomorphic feedbacks between mineral sediment deposition and above-ground plant growth are thought to have dominated the evolution of many coastal ecosystems and landforms. However, land-use-related reductions in sediment delivery rates to estuaries world-wide suggest that these above-ground feedbacks may not apply in some of the world's most vulnerable coastal landscapes.
2. To understand t
Authors
Matthew L. Kirwan, Glenn R. Guntenspergen
Numerical models of salt marsh evolution: ecological, geomorphic, and climatic factors
Salt marshes are delicate landforms at the boundary between the sea and land. These ecosystems support a diverse biota that modifies the erosive characteristics of the substrate and mediates sediment transport processes. Here we present a broad overview of recent numerical models that quantify the formation and evolution of salt marshes under different physical and ecological drivers. In particula
Authors
Sergio Fagherazzi, Matthew L. Kirwan, Simon M. Mudd, Glenn R. Guntenspergen, Stijn Temmerman, Andrea D'Alpaos, Johan van de Koppel, John Rybczyk, Enrique Reyes, Chris Craft, Jonathan Clough
Numerical models of salt marsh evolution: Ecological, geomorphic, and climatic factors
Salt marshes are delicate landforms at the boundary between the sea and land. These ecosystems support a diverse biota that modifies the erosive characteristics of the substrate and mediates sediment transport processes. Here we present a broad overview of recent numerical models that quantify the formation and evolution of salt marshes under different physical and ecological drivers. In particula
Authors
S. Fagherazzi, M. L. Kirwan, S.M. Mudd, G.R. Guntenspergen, S. Temmerman, A. D'Alpaos, J. Van De Koppel, J.M. Rybczyk, E. Reyes, C. Craft, J. Clough
Concluding remarks: The way forward for urban ecology
No abstract available.
Authors
J. Niemela, J.H. Breuste, Thomas Elmqvist, Glenn R. Guntenspergen, P. James, N.E. McIntyre
Introduction; Concluding remarks
No abstract available.
Authors
Jari Niemela, Jiirgen Breuste, Thomas Elmqvist, Glenn R. Guntenspergen, Philip James, Nancy McIntyre
The greenhouse gas flux and potential global warming feedbacks of a northern macrotidal and microtidal salt marsh
Conversion of wetlands by drainage for agriculture or other anthropogenic activities could have a negative or positive feedback to global warming (GWF). We suggest that a major predictor of the GWF is salinity of the wetland soil (a proxy for available sulfate), a factor often ignored in other studies. We assess the radiative balance of two northern salt marshes with average soil salinities > 20 p
Authors
Gail L. Chmura, Lisa Kellman, Glenn R. Guntenspergen
Influence of tidal range on the stability of coastal marshland
Early comparisons between rates of vertical accretion and sea level rise across marshes in different tidal ranges inspired a paradigm that marshes in high tidal range environments are more resilient to sea level rise than marshes in low tidal range environments. We use field‐based observations to propose a relationship between vegetation growth and tidal range and to adapt two numerical models of
Authors
Matthew L. Kirwan, Glenn R. Guntenspergen
Climate change, sea-level rise, and coastal wetlands
No abstract available.
Authors
Donald R. Cahoon, G.R. Guntenspergen
Prairie wetland complexes as landscape functional units in a changing climate
The wetland complex is the functional ecological unit of the prairie pothole region (PPR) of central North America. Diverse complexes of wetlands contribute high spatial and temporal environmental heterogeneity, productivity, and biodiversity to these glaciated prairie landscapes. Climatewarming simulations using the new model WETLANDSCAPE (WLS) project major reductions in water volume, shortening
Authors
W. Carter Johnson, Brett Werner, Glenn R. Guntenspergen, Richard A. Voldseth, Bruce Millett, David E. Naugle, Mirela Tulbure, Rosemary W.H. Carroll, John Tracy, Craig Olawsky
Limits on the adaptability of coastal marshes to rising sea level
Assumptions of a static landscape inspire predictions that about half of the world's coastal wetlands will submerge during this century in response to sea-level acceleration. In contrast, we use simulations from five numerical models to quantify the conditions under which ecogeomorphic feedbacks allow coastal wetlands to adapt to projected changes in sea level. In contrast to previous sea-level as
Authors
Matthew L. Kirwan, Glenn R. Guntenspergen, Andrea D'Alpaos, James T. Morris, Simon M. Mudd, Stijn Temmerman
Conceptual hierarchical modeling to describe wetland plant community organization
Using multivariate analysis, we created a hierarchical modeling process that describes how differently-scaled environmental factors interact to affect wetland-scale plant community organization in a system of small, isolated wetlands on Mount Desert Island, Maine. We followed the procedure: 1) delineate wetland groups using cluster analysis, 2) identify differently scaled environmental gradients u
Authors
A.M. Little, G.R. Guntenspergen, T. F. H. Allen
Climate trends of the North American prairie pothole region 1906-2000
The Prairie Pothole Region (PPR) is unique to North America. Its millions of wetlands and abundant ecosystem goods and services are highly sensitive to wide variations of temperature and precipitation in time and space characteristic of a strongly continental climate. Precipitation and temperature gradients across the PPR are orthogonal to each other. Precipitation nearly triples from west to east
Authors
B. Millett, W.C. Johnson, G. Guntenspergen