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treesbiology
climate change
vegetation
monitoring
plants
white spruce
species composition
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physical sciences
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tree growth
soil
seeds
pollen
5 dossier(s) trouvé(s) portant l’étiquette "treeline" (les projets pluriannuels sont regroupés):
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Changes in plant communities from subarctic forest to tundra
chercheur principal: Henry, Gregory H.R.
Année(s) de permis: 1995 1994 1993 1991
Résumé: This study continues from the research conducted in 1991 where we examined the plant community and assessed plant distribution as the subarctic forest changes to tundra. We are interested in how the smaller plant species are influenced by changes in the number of trees that are nearby as well as changes in climate. Permanent plots will be established in order to monitor any changes in the plant ...
Année(s) de permis: 1995 1994 1993 1991
Résumé: This study continues from the research conducted in 1991 where we examined the plant community and assessed plant distribution as the subarctic forest changes to tundra. We are interested in how the smaller plant species are influenced by changes in the number of trees that are nearby as well as changes in climate. Permanent plots will be established in order to monitor any changes in the plant ...
Stability of the arctic tree-line: a test for the greenhouse effect
chercheur principal: Nichols, Harvey
Année(s) de permis: 1993
Résumé: Tree-line plant species are sensitive to changes in climate. Most trees growing in the tree-line reproduce by `layering' which means that they do not produce seeds but instead the tree limbs of individual trees produce roots to generate another `tree'. Seeds can only be produced when the summer climate is warm enough. By monitor- ing the reproduction of trees in the tree-line, information can be...
Année(s) de permis: 1993
Résumé: Tree-line plant species are sensitive to changes in climate. Most trees growing in the tree-line reproduce by `layering' which means that they do not produce seeds but instead the tree limbs of individual trees produce roots to generate another `tree'. Seeds can only be produced when the summer climate is warm enough. By monitor- ing the reproduction of trees in the tree-line, information can be...
Climatic Change at the Forest/Tundra Boundary
chercheur principal: Landhaeusser, Simon M.
Année(s) de permis: 1992 1991 1990
Résumé: The Researcher and his team will seed and plant plots prepared in 1990. They will determine the germination rate, establishment and the annual growth of the seedlings. The measurements will be related to the energy input which influences these microsites....
Année(s) de permis: 1992 1991 1990
Résumé: The Researcher and his team will seed and plant plots prepared in 1990. They will determine the germination rate, establishment and the annual growth of the seedlings. The measurements will be related to the energy input which influences these microsites....
Licence #2393
chercheur principal: Jacoby, Jr., Gordon C.
Année(s) de permis: 1978
Résumé: To collect 1/2 inch diameter core samples from old, climatically - sensitive trees at or near the northern tree line....
Année(s) de permis: 1978
Résumé: To collect 1/2 inch diameter core samples from old, climatically - sensitive trees at or near the northern tree line....
Licence #2268
chercheur principal: Elliott, Deborah
Année(s) de permis: 1978
Résumé: As part of a Ph.D. program to ascertain stability of the northern Canadian tree limit through collecting samples of seeds, pollen, surface soil and cuttings. Tree cores will also be taken....
Année(s) de permis: 1978
Résumé: As part of a Ph.D. program to ascertain stability of the northern Canadian tree limit through collecting samples of seeds, pollen, surface soil and cuttings. Tree cores will also be taken....
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