Glenn Guntenspergen, Ph.D.
Science and Products
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...
Weinstein, M.P.; Keough, J.R.; Guntenspergen, G.R.; Litvin, S.Y. 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...
Austin, Jane E.; Guntenspergen, Glenn R.; Sklebar, H. Thomas; Buhl, T.K. 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...
Guntenspergen, Glenn R.; Peterson, S.A.; Leibowitz, S.G.; Cowardin, L.M. 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....
Mladenoff, D.J.; Dahir, S.E.; Nordheim, E.V.; Schulte, L.A.; Guntenspergen, G.R. Duck populations as indicators of landscape condition in the Prairie Pothole Region
The Prairie Pothole Region of the northern Great Plains is an important region for waterfowl production because of the abundance of shallow wetlands. The ecological significance of the region and impacts from intensive agriculture prompted the U.S. Environmental Protection Agency to select it as one of the first areas for developing and evaluating...
Austin, Jane E.; Buhl, Thomas K.; Guntenspergen, Glenn R.; Norling, Wayne; Sklebar, H. Thomas 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...
Austin, Jane E.; Sklebar, H. Thomas; Guntenspergen, Glenn R.; Buhl, Thomas K. 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...
Keough, Janet R.; Thompson, Todd A.; Guntenspergen, Glenn R.; Wilcox, Douglas A. 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,...
Guntenspergen, Glenn R.; Vairin, Beth A. Willful winds : Hurricane Andrew and Louisiana's coast
No abstract available.
Guntenspergen, Glenn R.; Vairin, Beth A. Disturbance and recovery of the Louisiana coastal marsh landscape from the impacts of Hurricane Andrew
The impact of Hurricane Andrew on the Louisiana coastal landscape and the initial recovery of wetland plant communities was determined from extensive surveys of a large geographic region of coastal marsh near Atchafalaya Bay and intensive studies of an oligohaline marsh on Otter Bayou. Wind and water movements associated with the hurricane...
Guntenspergen, Glenn R.; Cahoon, Donald R.; Grace, James B.; Steyer, Gregory D.; Fournet, Stephen; Townson, M. A.; Foote, A. Lee Wetland systems and their response to management
No abstract available.
Guntenspergen, Glenn R.; Keough, J.R.; Allen, J.