Now showing items 1-10 of 17
Nobel Peace Prize Citation
Vegetation mosaics, patch dynamics and alternate stable states in an arctic intertidal marsh.
(Ottawa : National Library of Canada = Bibliothèque nationale du Canada, 2002)
Soil degradation occurs following loss of vegetative cover at both the landscape and individual patch scale at La Pérouse Bay, Manitoba. At the landscape scale, soils from vegetated patches had a higher infiltration rate, ...
Free amino acids in Arctic salt-marsh coastal sites and plant nitrogen acquisition
(Ottawa : National Library of Canada = Bibliothèque nationale du Canada, 2004)
The importance of free amino acids as a source of plant nitrogen was examined in an Arctic coastal salt-marsh. Concentrations of inorganic nitrogen in salt-marsh soils were low relative to those reported for most temperate ...
A Remembrance and Celebration of the Life of Robert Lenthall Jefferies
(University of Toronto, 09/11/2009)
Soluble carbohydrate content of shoots of Arctic wetland plants that are consumed by lesser snow geese
(NRC Research Press, 2008)
We recorded seasonal changes in the total amounts of soluble carbohydrates in shoots of salt- and fresh-water coastal plants at La Pérouse Bay, northern Manitoba, to determine whether adult snow geese and their goslings ...
Goose-induced Changes in Vegetation and Land Cover between 1976 and 1997 in an Arctic Coastal Marsh
(Institute of Arctic and Alpine Research (INSTAAR), University of Colorado, 2005)
Since the 1970s, a breeding colony of lesser snow geese (Chen caerulescens caerulescens L.) at La Pérouse Bay, Manitoba, has grown 8% annually. This increase has led to significant loss of plant cover in all major salt- ...
Nutrient Limitation of Plants and Soil Microbial Growth in an Arctic Coastal Salt Marsh.
(Ottawa : National Library of Canada = Bibliothèque nationale du Canada, 2005)
In order to assess the nutrient limitation of plants and soil microorganisms in the Arctic coastal salt marsh at La Pérouse Bay, Manitoba, a nitrogen (N) and phosphorus (P) fertilization experiment was conducted. The ...
Professor Bob Jefferies: A class act
(Varsity Science, 07/09/2009)
Patterns and Processes of Species Diversity in Fragmented Northern Hardwood Forests.
(Toronto : University of Toronto, 2001)
Twenty-four upland hardwood forests were examined to determine the influence of plant dispersal and environmental heterogeneity on the composition and richness of species in the forest understory. Patterns in the dispersal ...
Allochthonous inputs: integrating population changes and food-web dynamics
Most ecosystems are recipients of allochthonous materials that enhance in situ productivity. Recent theoretical and empirical studies suggest that low to moderate inputs can stabilize food webs. However, depending on the ...