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4 record(s) found with the tag "tree reproduction" (multi-year projects are grouped):
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The Reproductive Biogeography of Dwarf Arctic Birch
Principal Investigator: Weis, Michael
Licensed Year(s): 1989 1988
Summary: To carry out this study the researcher will harvest birch stems cut at ground level. The number of stems cut is limited and the survival of genetic individuals and populations is not affected significantly. This project is a continuation of work began in 1988....

The genecology of seedling drought resistance in jack pine
Principal Investigator: Wright, Robert A.
Licensed Year(s): 1988
Summary: to describe the differences in seedling drought resistance between jack pine populations from the geographic and environmental extremes of the range...

Licence #5071
Principal Investigator: Weis, Michael
Licensed Year(s): 1985
Summary: To study the biological breakdown of sexual reproduction in the birch at and near its range limit....

Licence #4085
Principal Investigator: Lewis, M.C.
Licensed Year(s): 1984
Summary: To complete studies begun in 1976 of plant species and vegetational communities and to undertake field studies to investigate sex ratios of arctic willows (Salix spp.) in relation to habitat, as there appears to be a predominance of female plants in many habitats. Seeds will be collected to observe this phenomenon in arctic willows....