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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GIS interpolations of witness tree records (1839-1866) for northern Wisconsin at multiple scales
To construct forest landscape of pre-European settlement periods, we developed a GIS interpolation approach to convert witness tree records of the U.S. General Land Office (GLO) survey from point to polygon data, which better described continuously distributed vegetation. The witness tree records (1839-1866) were processed for a 3-million ha landscape in northern Wisconsin, U.S.A. at different sca
Authors
H.S. He, D.J. Mladenoff, T.A. Sickley, G.R. Guntenspergen
Effects of roadside transect width on waterfowl and wetland estimates
Strip transects located along roads are commonly used to estimate waterfowl populations and characterize associated wetland habitat. We used data collected in May and early June, 1995, on forty-five 40-km2 plots in North Dakota to evaluate bias of 800-m and 400-m wide roadside transects for sampling wetlands relative to a larger (40-km2) scale and to compare duck abundance at the two widths. Densi
Authors
Jane E. Austin, H. Thomas Sklebar, Glenn R. Guntenspergen, Thomas K. Buhl
The effects of landscape position on plant species density: Evidence of past environmental effects in a coastal wetland
Here we propose that an important cause of variation in species density may be prior environmental conditions that continue to influence current patterns. In this paper we investigated the degree to which species density varies with location within the landscape, independent of contemporaneous environmental conditions. The area studied was a coastal marsh landscape subject to periodic storm even
Authors
J.B. Grace, G.R. Guntenspergen
Fifty-eighth Christmas Bird Count. 166. Ocean City, Md
Gauging the impact of manipulative activities, such as rehabilitation or management, on wetlands requires having a notion of the unmanipulated condition as a reference. An understanding of the reference condition requires knowledge of dominant factors influencing ecosystem processes and biological communities. In this paper, we focus on natural physical factors (conditions and processes) that d
Authors
J.R. Keough, T.A. Thompson, G.R. Guntenspergen, D.A. Wilcox
Hydrogeomorphic factors and ecosystem responses in coastal wetlands of the Great Lakes
Gauging the impact of manipulative activities, such as rehabilitation or management, on wetlands requires having a notion of the unmanipulated condition as a reference. And understanding of the reference condition requires knowledge of dominant factors influencing ecosystem processes and biological communities. In this paper, we focus on natural physical factors (conditions and processes) that dri
Authors
Janet R. Keough, Todd A. Thompson, Glenn R. Guntenspergen, Douglas A. Wilcox
Vulnerability of coastal wetlands in the Southeastern United States: climate change research results, 1992-97
As part of the USGCRP research framework on coastal lands and ecosystems, the Biological Resources Division of the U.S. Geological Survey (National Wetlands Research Center) entered into partnership with Rice University, Louisiana State University, Duke University, Clemson University, University of Southwestern Louisiana, University of Georgia, and the Virginia Institute of Marine Studies (Univers
Authors
Glenn R. Guntenspergen, Beth A. Vairin
Introduction: Long-term ecological sustainability of wetlands in urbanizing landscapes
No abstract available.
Authors
G.R. Guntenspergen, C.P. Dunn
Coastal wetlands and climate change
Abstract has not been submitted
Authors
G.R. Guntenspergen, B.A. Vairin, V.R. Burkett, D. McGrath
Understory plant species composition in remnant stands along an urban-to-rural land-use gradient
We examined the understory species composition of 24 remnant forest stands along an urban-to-rural gradient in the metropolitan Milwaukee, Wisconsin region to determine the relationships between plant community composition, human disturbance, and contrasting types of land use along a gradient of urbanization. A significant difference was found in shrub species community composition among three con
Authors
G.R. Guntenspergen, J.B. Levenson
Coastal wetlands and global change: overview
The potential impacts of climate change are of great practical concern to those interested in coastal wetland resources. Among the areas of greatest risk in the United States are low-lying coastal habitats with easily eroded substrates which occur along the northern Gulf of Mexico and southeast Atlantic coasts. The Intergovernmental Panel on Climate Change (IPCC) and the World Meteorological Organ
Authors
G.R. Guntenspergen, B. Vairin, V.R. Burkett
Global change and submerged aquatic vegetation research
Communities of submerged aquatic vegetation (SAY) are important components of many freshwater, brackish, and marine
aquatic ecosystems. They prevent erosion by baffling the impacts of waves, especially from storms. These aquatic plant
communities remove nutrients and other pollutants from river and runoff inputs to coastal areas, preventing their entry into
surrounding waters. They provide nursery
Authors
H.A. Neckles, G.R. Guntenspergen, W.M. Rizzo, T.C. Michot
Willful winds : Hurricane Andrew and Louisiana's coast
No abstract available.
Authors
Glenn R. Guntenspergen, Beth A. Vairin
Science and Products
Filter Total Items: 14
No Result Found
Filter Total Items: 119
GIS interpolations of witness tree records (1839-1866) for northern Wisconsin at multiple scales
To construct forest landscape of pre-European settlement periods, we developed a GIS interpolation approach to convert witness tree records of the U.S. General Land Office (GLO) survey from point to polygon data, which better described continuously distributed vegetation. The witness tree records (1839-1866) were processed for a 3-million ha landscape in northern Wisconsin, U.S.A. at different sca
Authors
H.S. He, D.J. Mladenoff, T.A. Sickley, G.R. Guntenspergen
Effects of roadside transect width on waterfowl and wetland estimates
Strip transects located along roads are commonly used to estimate waterfowl populations and characterize associated wetland habitat. We used data collected in May and early June, 1995, on forty-five 40-km2 plots in North Dakota to evaluate bias of 800-m and 400-m wide roadside transects for sampling wetlands relative to a larger (40-km2) scale and to compare duck abundance at the two widths. Densi
Authors
Jane E. Austin, H. Thomas Sklebar, Glenn R. Guntenspergen, Thomas K. Buhl
The effects of landscape position on plant species density: Evidence of past environmental effects in a coastal wetland
Here we propose that an important cause of variation in species density may be prior environmental conditions that continue to influence current patterns. In this paper we investigated the degree to which species density varies with location within the landscape, independent of contemporaneous environmental conditions. The area studied was a coastal marsh landscape subject to periodic storm even
Authors
J.B. Grace, G.R. Guntenspergen
Fifty-eighth Christmas Bird Count. 166. Ocean City, Md
Gauging the impact of manipulative activities, such as rehabilitation or management, on wetlands requires having a notion of the unmanipulated condition as a reference. An understanding of the reference condition requires knowledge of dominant factors influencing ecosystem processes and biological communities. In this paper, we focus on natural physical factors (conditions and processes) that d
Authors
J.R. Keough, T.A. Thompson, G.R. Guntenspergen, D.A. Wilcox
Hydrogeomorphic factors and ecosystem responses in coastal wetlands of the Great Lakes
Gauging the impact of manipulative activities, such as rehabilitation or management, on wetlands requires having a notion of the unmanipulated condition as a reference. And understanding of the reference condition requires knowledge of dominant factors influencing ecosystem processes and biological communities. In this paper, we focus on natural physical factors (conditions and processes) that dri
Authors
Janet R. Keough, Todd A. Thompson, Glenn R. Guntenspergen, Douglas A. Wilcox
Vulnerability of coastal wetlands in the Southeastern United States: climate change research results, 1992-97
As part of the USGCRP research framework on coastal lands and ecosystems, the Biological Resources Division of the U.S. Geological Survey (National Wetlands Research Center) entered into partnership with Rice University, Louisiana State University, Duke University, Clemson University, University of Southwestern Louisiana, University of Georgia, and the Virginia Institute of Marine Studies (Univers
Authors
Glenn R. Guntenspergen, Beth A. Vairin
Introduction: Long-term ecological sustainability of wetlands in urbanizing landscapes
No abstract available.
Authors
G.R. Guntenspergen, C.P. Dunn
Coastal wetlands and climate change
Abstract has not been submitted
Authors
G.R. Guntenspergen, B.A. Vairin, V.R. Burkett, D. McGrath
Understory plant species composition in remnant stands along an urban-to-rural land-use gradient
We examined the understory species composition of 24 remnant forest stands along an urban-to-rural gradient in the metropolitan Milwaukee, Wisconsin region to determine the relationships between plant community composition, human disturbance, and contrasting types of land use along a gradient of urbanization. A significant difference was found in shrub species community composition among three con
Authors
G.R. Guntenspergen, J.B. Levenson
Coastal wetlands and global change: overview
The potential impacts of climate change are of great practical concern to those interested in coastal wetland resources. Among the areas of greatest risk in the United States are low-lying coastal habitats with easily eroded substrates which occur along the northern Gulf of Mexico and southeast Atlantic coasts. The Intergovernmental Panel on Climate Change (IPCC) and the World Meteorological Organ
Authors
G.R. Guntenspergen, B. Vairin, V.R. Burkett
Global change and submerged aquatic vegetation research
Communities of submerged aquatic vegetation (SAY) are important components of many freshwater, brackish, and marine
aquatic ecosystems. They prevent erosion by baffling the impacts of waves, especially from storms. These aquatic plant
communities remove nutrients and other pollutants from river and runoff inputs to coastal areas, preventing their entry into
surrounding waters. They provide nursery
Authors
H.A. Neckles, G.R. Guntenspergen, W.M. Rizzo, T.C. Michot
Willful winds : Hurricane Andrew and Louisiana's coast
No abstract available.
Authors
Glenn R. Guntenspergen, Beth A. Vairin