Susan M. Galatowitsch

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The spread of invasive taxa, includingLythrum salicaria, Typha × glauca, Myriophyllum spicatum, Phalaris arundinacea, andPhragmites australis, has dramatically changed the vegetation of many wetlands of North America. Three theories have been advanced to explain the nature of plant invasiveness. Aggressive growth during geographic expansion could result(More)
Although wetland restoration has been a key part of U.S. environmental policy for 20 years (i.e., “no net loss”), there is little long-term data on restorations to guide planning and assessment. Understanding how restored wetland communities deviate from natural conditions, and how long those deviations persist, can provide important insights into the(More)
Landscape-level variables operating at multiple spatial scales likely influence wetland amphibian assemblages but have not been investigated in detail. We examined the significance of habitat loss and fragmentation, as well as selected within-wetland conditions, affecting amphibian assemblages in twenty-one glacial marshes. Wetlands were located within(More)
0006-3207/$ see front matter 2009 Elsevier Ltd. A doi:10.1016/j.biocon.2009.03.030 * Corresponding author. Tel.: +1 612 624 3242; fax E-mail addresses: galat001@umn.edu (S. Galatow Frelich), phil0308@umn.edu (L. Phillips-Mao). Scenario planning should be an effective tool for developing responses to climate change but will depend on ecological assessments(More)
Invasions by Phalaris arundinacea (reed canarygrass) preclude establishment of sedge meadow vegetation in restored wetlands in the midwest USA. To evaluate cover crops as a potential method of P. arundinacea control, we examined the effects of lowering light availability (from 600 to 200 and 10 μmol m−2 s−1) on competition between P. arundinacea and a(More)
Wetland coverage and type distributions vary systematically by ecoregion across the Great Lakes Basin. Land use and subsequent changes in wetland type distributions also vary among ecoregions. Incidence of wetland disturbance varies significantly within ecoregions but tends to increase from north to south with intensity of land use. Although the nature of(More)
The crop domestication process is examined from plant collection to product release for various junctures at which deliberate breeding, selection, and crop transformation may occur to prevent invasive potential. Four primary juncture opportunities for research on techniques and development of selection procedures for non-invasiveness include: The Plant(More)
Invasive plants, such as Phragmites australis, can profoundly affect channel environments of large rivers by stabilizing sediments and altering water flows. Invasive plant removal is considered necessary where restoration of dynamic channels is needed to provide critical habitat for species of conservation concern. However, these programs are widely(More)
In the mid-1980's, thousands of wetlands in the mid-continental Unites States were restored by interrupting drainage lines; revegetation of these systems, often cropped for decades and positioned in a predominantly agricultural landscape, relied solely on natural recolonization. A study of 64 of these wetlands determined that by 1991, three years after(More)
Size asymmetry in plant light acquisition complicates predictions of competitive outcomes in light-limited communities. We present a mathematically tractable model of asymmetric competition for light and discuss its implications for predicting outcomes of competition during establishment in two-, three-, and many-species communities. In contrast to the(More)