Water-depth tolerances of emergent plants in the Delta Marsh, Manitoba,Canada / Louisa Squires.
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TextPublication details: Ames, IA : Iowa State University, 1991.Description: vi, 69 leaves : ill. ; 28 cmOnline resources: Abstract: A fundamental question in plant ecology is how much do environmental gradients per se influence the distribution of species (Whittaker 1967).In an attempt to answer this question, the development of wetland zonation patterns has received recent attention (Snow and Vince 1984;Wilson and Keddy 1985; van der Valk and Welling 1988; Welling et al.1988a) Various environmental factors deemed important in the origin of wetland zonation have generally been studied independently (e.g., Keddy and ellis 1985; Parker and Leck 1985; Grace 1987). van der Valk and Welling (1988) suggested, however, that zonation in prairie wetlands results from a combination of events that occurred in a particular order, including 1) the dispersal patterns of seeds or other propagules,2) differential seedling recruitment along a moisture gradient, 3)differential survival of juvenile and adult plants at different water depths along a gradient, or 4) competition among seedlings and adults.Vegetation cycles in pra
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Thesis(M.S.)--Iowa State University, 1991.
Includes bibliographical references (leaves 57-61).
A fundamental question in plant ecology is how much do environmental gradients per se influence the distribution of species (Whittaker 1967).In an attempt to answer this question, the development of wetland zonation patterns has received recent attention (Snow and Vince 1984;Wilson and Keddy 1985; van der Valk and Welling 1988; Welling et al.1988a) Various environmental factors deemed important in the origin of wetland zonation have generally been studied independently (e.g., Keddy and ellis 1985; Parker and Leck 1985; Grace 1987). van der Valk and Welling (1988) suggested, however, that zonation in prairie wetlands results from a combination of events that occurred in a particular order, including 1) the dispersal patterns of seeds or other propagules,2) differential seedling recruitment along a moisture gradient, 3)differential survival of juvenile and adult plants at different water depths along a gradient, or 4) competition among seedlings and adults.Vegetation cycles in pra