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dc.contributor.authorKotanen, Peter M.
dc.identifier.citationThesis (M.Sc.) - University of Toronto. P. M. Kotanen: Theses Canada, 1987. (AMICUS No. 35376047)
dc.descriptionMasters Thesis completed in 1987 by P. M. Kotanen at the University of Toronto. Supervised by Dr. R.L. Jefferies.
dc.description.abstract1.The responses to herbivory of above-ground organs of the sedges Carex subspathaces and Carex X flavicans were investigated at La Pérouse Bay, Manitoba. Demographic techniques were used to compare the production and turnover of leaves and shoots and the elongation of leaves between plants of swards on which lesser snow Geese fed and plants of swards from which geese were excluded. The effects of herbivory on the shoot demography of carex aquatilis were also studied.en_US
dc.description.abstract2.Patterns of foraging by the geese varied seasonally. Following their arrival at La Pérouse Bay, the geese fed by pulling shoots of carices and by grubbing the roots and rhizomes of graminoids. After the hatch of the goslings, the geese fed by clipping the leaves of grasses and sedges.en_US
dc.description.abstract3.Within one summer, gazing increased the cumulative production of leaves of Carex subspathaceaand of Carex X flavcas. Though the geese removed few leaves, leaves of shoots of both species in grazed plots had shorter lifespans than leaves of shoots in ungrazed plots. Grazing also increased the total number of leaves per shoot which died during the growing season.en_US
dc.description.abstract4.The rates of elongation of leaves of shoots of Carex subspathacea and Carex X flavicans in grazed plots did not consistently differ from the rates of elongation of leaves of shoots in ungrazed plots.en_US
dc.description.abstract5.Herbivory by geese did not consistently alter the production of shoots of Carex aquatilis, Carex subspathacea, or Carex X flavicans.en_US
dc.description.abstract6.The increased production of leaves is the primary response of above-ground organs of these carices to herbivory by geese. The unresponsiveness of shoot production suggests that these carices are more vulnerable to damage from the loss of shoots than from the clipping of leaves.en_US
dc.subjectCarex X flavicans
dc.subjectCarex subspathaces
dc.subjectLa Pérouse Bay
dc.subjectlesser snow geese
dc.subjectcarex aquatilis
dc.titleA comparison of the growth responses of three sedges to foraging by lesser snow geese.

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