Glenn Guntenspergen, Ph.D.
Glenn is a Research Ecologist at the Eastern Ecological Science Center in Laurel, MD.
Science and Products
Filter Total Items: 19
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Filter Total Items: 132
Fine-scale spatial variation in plant species richness and its relationship to environmental conditions in coastal marshlands Fine-scale spatial variation in plant species richness and its relationship to environmental conditions in coastal marshlands
Previous studies have shown that variations in environmental conditions play a major role in explaining variations in plant species richness at community and landscape scales. In this study, we considered the degree to which fine-scale spatial variations in richness could be related to fine-scale variations in abiotic and biotic factors. To examine spatial variation in richness, grids of...
Authors
J.E. Mancera, G.C. Meche, P.P. Cardona-Olarte, E. Castaneda-Moya, R.L. Chiasson, N.A. Geddes, L.M. Schile, H.G. Wang, G.R. Guntenspergen, J.B. Grace
Salt tolerance underlies the cryptic invasion of North American salt marshes by an introduced haplotype of the common reed Phragmites australis (Poaceae) Salt tolerance underlies the cryptic invasion of North American salt marshes by an introduced haplotype of the common reed Phragmites australis (Poaceae)
A distinct, non-native haplotype of the common reed Phragmites australis has become invasive in Atlantic coastal Spartina marshes. We compared the salt tolerance and other growth characteristics of the invasive M haplotype with 2 native haplotypes (F and AC) in greenhouse experiments. The M haplotype retained 50% of its growth potential up to 0.4 M NaCl, whereas the F and AC haplotypes...
Authors
Edward Vasquez, Edward Glenn, J. Brown, Glenn Guntenspergen, Stephen Nelson
Vulnerability of northern prairie wetlands to climate change Vulnerability of northern prairie wetlands to climate change
The prairie pothole region (PPR) lies in the heart of North America and contains millions of glacially formed, depressional wetlands embedded in a landscape matrix of natural grassland and agriculture. These wetlands provide valuable ecosystem services and produce 50% to 80% of the continent's ducks. We explored the broad spatial and temporal patterns across the PPR between climate and...
Authors
W. Carter Johnson, Bruce Millett, Tagir Gilmanov, Richard Voldseth, Glenn Guntenspergen, David E. Naugle
The Blackwater NWR inundation model. Rising sea level on a low-lying coast: land use planning for wetlands The Blackwater NWR inundation model. Rising sea level on a low-lying coast: land use planning for wetlands
The Blackwater National Wildlife Refuge (BNWR), on the Eastern Shore of Chesapeake Bay (figure 1), occupies an area less than 1 meter above sea level. The Refuge has been featured prominently in studies of the impact of sea level rise on coastal wetlands. Most notably, the refuge has been sited by the Intergovernmental Panel on Climate Change (IPCC) as a key example of 'wetland loss'...
Authors
Curt Larsen, Inga Clark, Glenn Guntenspergen, Don Cahoon, Vincent Caruso, Cliff Hupp, Tom Yanosky
Influence of weather extremes on the water levels of glaciated prairie wetlands Influence of weather extremes on the water levels of glaciated prairie wetlands
Orchid Meadows is a long-term wetland research and monitoring site on the Coteau des Prairie in extreme east-central South Dakota, USA. It is a 65-ha Waterfowl Production Area with numerous temporary, seasonal, and semi-permanent wetlands. Ground water and surface water have been monitored at the site from 1987 to 1989 and from 1993 to the present. Vegetation has been monitored since...
Authors
W.C. Johnson, S.E. Boettcher, K.A. Poiani, G. Guntenspergen
Seasonal methane emissions by diffusion and ebullition from oligohaline marsh environments in coastal Louisiana Seasonal methane emissions by diffusion and ebullition from oligohaline marsh environments in coastal Louisiana
Methane is an important atmospheric greenhouse gas that is emitted from many natural and anthropogenic sources. In order to evaluate the global methane budget, precise data are needed from the diverse sources including coastal wetlands. Over 100 time-series determinations of methane emissions from an oligohaline wetland (brackish marsh) in coastal Louisiana show large variability during...
Authors
Joel Leventhal, Glenn Guntenspergen
Differences in distribution of modified basins and ducks relative to roadside transects Differences in distribution of modified basins and ducks relative to roadside transects
Wetland basins in the Prairie Pothole Region of the U.S. are commonly modified by excavation (e.g., roadside ditches, stock dugouts), partial drainage (ditching), and diking. Differences in the distribution of modified wetlands may affect the predictive accuracy of waterfowl survey data if such wetlands are not distributed randomly in the landscape and if waterfowl are not distributed...
Authors
Jane Austin, Glenn Guntenspergen, H. Sklebar, T.K. Buhl
An integrated analysis of the effects of past land use on forest herb colonization at the landscape scale An integrated analysis of the effects of past land use on forest herb colonization at the landscape scale
A framework that summarizes the direct and indirect effects of past land use on forest herb recolonization is proposed, and used to analyse the colonization patterns of forest understorey herbaceous species in a 360-ha mixed forest, grassland and arable landscape in the Dijle river valley (central Belgium). Fine-scale distribution maps were constructed for 14 species. The species were...
Authors
K. Verheyen, Glenn Guntenspergen, B. Biesbrouck, M. Hermy
Preface: Phragmites australis: A sheep in wolf's clothing? Preface: Phragmites australis: A sheep in wolf's clothing?
A. problem with national priorities for control or prevention of aquatic nuisance species is that we often do not know the full extent of the problem, if there is one. To address this issue, we hosted a technical forum and workshop-Phragmites australis: A Sheep in Wolf's Clothing?--with a focus on new research and critical reviews that address the role of Phragmites as a noxious weed....
Authors
M.P. Weinstein, J.R. Keough, G.R. Guntenspergen, S.Y. Litvin
Preface: Phragmites australis - A Sheep in Wolf's Clothing? Preface: Phragmites australis - A Sheep in Wolf's Clothing?
[No abstract available]
Authors
M.P. Weinstein, J.R. Keough, G.R. Guntenspergen, S.Y. Litvin
Narrowing historical uncertainty: probabilistic classification of ambiguously identified tree species in historical forest survey data Narrowing historical uncertainty: probabilistic classification of ambiguously identified tree species in historical forest survey data
Historical data have increasingly become appreciated for insight into the past conditions of ecosystems. Uses of such data include assessing the extent of ecosystem change; deriving ecological baselines for management, restoration, and modeling; and assessing the importance of past conditions on the composition and function of current systems. One historical data set of this type is the...
Authors
D.J. Mladenoff, S.E. Dahir, E.V. Nordheim, L.A. Schulte, G.R. Guntenspergen
Indicators of wetland condition for the Prairie Pothole Region of the United States Indicators of wetland condition for the Prairie Pothole Region of the United States
We describe a study designed to evaluate the performance ofwetland condition indicators of the Prairie Pothole Region (PPR)of the north central United States. Basin and landscape scaleindicators were tested in 1992 and 1993 to determine theirability to discriminate between the influences of grasslanddominated and cropland dominated landscapes in the PPR. Pairedplots were selected from...
Authors
Glenn Guntenspergen, S.A. Peterson, S.G. Leibowitz, L.M. Cowardin
Science and Products
Filter Total Items: 19
No Result Found
Filter Total Items: 132
Fine-scale spatial variation in plant species richness and its relationship to environmental conditions in coastal marshlands Fine-scale spatial variation in plant species richness and its relationship to environmental conditions in coastal marshlands
Previous studies have shown that variations in environmental conditions play a major role in explaining variations in plant species richness at community and landscape scales. In this study, we considered the degree to which fine-scale spatial variations in richness could be related to fine-scale variations in abiotic and biotic factors. To examine spatial variation in richness, grids of...
Authors
J.E. Mancera, G.C. Meche, P.P. Cardona-Olarte, E. Castaneda-Moya, R.L. Chiasson, N.A. Geddes, L.M. Schile, H.G. Wang, G.R. Guntenspergen, J.B. Grace
Salt tolerance underlies the cryptic invasion of North American salt marshes by an introduced haplotype of the common reed Phragmites australis (Poaceae) Salt tolerance underlies the cryptic invasion of North American salt marshes by an introduced haplotype of the common reed Phragmites australis (Poaceae)
A distinct, non-native haplotype of the common reed Phragmites australis has become invasive in Atlantic coastal Spartina marshes. We compared the salt tolerance and other growth characteristics of the invasive M haplotype with 2 native haplotypes (F and AC) in greenhouse experiments. The M haplotype retained 50% of its growth potential up to 0.4 M NaCl, whereas the F and AC haplotypes...
Authors
Edward Vasquez, Edward Glenn, J. Brown, Glenn Guntenspergen, Stephen Nelson
Vulnerability of northern prairie wetlands to climate change Vulnerability of northern prairie wetlands to climate change
The prairie pothole region (PPR) lies in the heart of North America and contains millions of glacially formed, depressional wetlands embedded in a landscape matrix of natural grassland and agriculture. These wetlands provide valuable ecosystem services and produce 50% to 80% of the continent's ducks. We explored the broad spatial and temporal patterns across the PPR between climate and...
Authors
W. Carter Johnson, Bruce Millett, Tagir Gilmanov, Richard Voldseth, Glenn Guntenspergen, David E. Naugle
The Blackwater NWR inundation model. Rising sea level on a low-lying coast: land use planning for wetlands The Blackwater NWR inundation model. Rising sea level on a low-lying coast: land use planning for wetlands
The Blackwater National Wildlife Refuge (BNWR), on the Eastern Shore of Chesapeake Bay (figure 1), occupies an area less than 1 meter above sea level. The Refuge has been featured prominently in studies of the impact of sea level rise on coastal wetlands. Most notably, the refuge has been sited by the Intergovernmental Panel on Climate Change (IPCC) as a key example of 'wetland loss'...
Authors
Curt Larsen, Inga Clark, Glenn Guntenspergen, Don Cahoon, Vincent Caruso, Cliff Hupp, Tom Yanosky
Influence of weather extremes on the water levels of glaciated prairie wetlands Influence of weather extremes on the water levels of glaciated prairie wetlands
Orchid Meadows is a long-term wetland research and monitoring site on the Coteau des Prairie in extreme east-central South Dakota, USA. It is a 65-ha Waterfowl Production Area with numerous temporary, seasonal, and semi-permanent wetlands. Ground water and surface water have been monitored at the site from 1987 to 1989 and from 1993 to the present. Vegetation has been monitored since...
Authors
W.C. Johnson, S.E. Boettcher, K.A. Poiani, G. Guntenspergen
Seasonal methane emissions by diffusion and ebullition from oligohaline marsh environments in coastal Louisiana Seasonal methane emissions by diffusion and ebullition from oligohaline marsh environments in coastal Louisiana
Methane is an important atmospheric greenhouse gas that is emitted from many natural and anthropogenic sources. In order to evaluate the global methane budget, precise data are needed from the diverse sources including coastal wetlands. Over 100 time-series determinations of methane emissions from an oligohaline wetland (brackish marsh) in coastal Louisiana show large variability during...
Authors
Joel Leventhal, Glenn Guntenspergen
Differences in distribution of modified basins and ducks relative to roadside transects Differences in distribution of modified basins and ducks relative to roadside transects
Wetland basins in the Prairie Pothole Region of the U.S. are commonly modified by excavation (e.g., roadside ditches, stock dugouts), partial drainage (ditching), and diking. Differences in the distribution of modified wetlands may affect the predictive accuracy of waterfowl survey data if such wetlands are not distributed randomly in the landscape and if waterfowl are not distributed...
Authors
Jane Austin, Glenn Guntenspergen, H. Sklebar, T.K. Buhl
An integrated analysis of the effects of past land use on forest herb colonization at the landscape scale An integrated analysis of the effects of past land use on forest herb colonization at the landscape scale
A framework that summarizes the direct and indirect effects of past land use on forest herb recolonization is proposed, and used to analyse the colonization patterns of forest understorey herbaceous species in a 360-ha mixed forest, grassland and arable landscape in the Dijle river valley (central Belgium). Fine-scale distribution maps were constructed for 14 species. The species were...
Authors
K. Verheyen, Glenn Guntenspergen, B. Biesbrouck, M. Hermy
Preface: Phragmites australis: A sheep in wolf's clothing? Preface: Phragmites australis: A sheep in wolf's clothing?
A. problem with national priorities for control or prevention of aquatic nuisance species is that we often do not know the full extent of the problem, if there is one. To address this issue, we hosted a technical forum and workshop-Phragmites australis: A Sheep in Wolf's Clothing?--with a focus on new research and critical reviews that address the role of Phragmites as a noxious weed....
Authors
M.P. Weinstein, J.R. Keough, G.R. Guntenspergen, S.Y. Litvin
Preface: Phragmites australis - A Sheep in Wolf's Clothing? Preface: Phragmites australis - A Sheep in Wolf's Clothing?
[No abstract available]
Authors
M.P. Weinstein, J.R. Keough, G.R. Guntenspergen, S.Y. Litvin
Narrowing historical uncertainty: probabilistic classification of ambiguously identified tree species in historical forest survey data Narrowing historical uncertainty: probabilistic classification of ambiguously identified tree species in historical forest survey data
Historical data have increasingly become appreciated for insight into the past conditions of ecosystems. Uses of such data include assessing the extent of ecosystem change; deriving ecological baselines for management, restoration, and modeling; and assessing the importance of past conditions on the composition and function of current systems. One historical data set of this type is the...
Authors
D.J. Mladenoff, S.E. Dahir, E.V. Nordheim, L.A. Schulte, G.R. Guntenspergen
Indicators of wetland condition for the Prairie Pothole Region of the United States Indicators of wetland condition for the Prairie Pothole Region of the United States
We describe a study designed to evaluate the performance ofwetland condition indicators of the Prairie Pothole Region (PPR)of the north central United States. Basin and landscape scaleindicators were tested in 1992 and 1993 to determine theirability to discriminate between the influences of grasslanddominated and cropland dominated landscapes in the PPR. Pairedplots were selected from...
Authors
Glenn Guntenspergen, S.A. Peterson, S.G. Leibowitz, L.M. Cowardin