Principal Investigator:MacDonald, Glen M Licensed Year(s):
2005
Summary:
The researchers believe that the treeline zone is one of the most sensitive areas on earth to temperature changes, both natural and caused by global warming. They would like to take a small core (5 cm diameter) from the mud at the bottom of two small lakes close to Back Lake, northeast of Yellowknife. In the laboratory, they will analyze the cores for temperature-sensitive aquatic insect remains...
Principal Investigator:MacDonald, Glen M Licensed Year(s):
1993
Summary:
As part of an on-going study, this research will involve collecting cores from trees located in the Campbell-Dolomite Uplands (near Campbell Lake). This data will be added to data collected in other locations (past studies) in order to determine how past climate has influenced the growth of trees (as indicated by tree rings within the tree trunk). The research is helpful in trying to understand ...
Principal Investigator:MacDonald, Glen M Licensed Year(s):1992
1990
Summary:
Dr. Glen MacDonald and his team will collect lake sediment core samples from 3 or 4 small lakes in the Mackenzie Mountains, adjacent to the Canol Road for the purpose of fossil pollen and macrofossil analysis. The area will be revisited in July to conduct surveys of vegetation at and around the treeline....
Principal Investigator:MacDonald, Glen M Licensed Year(s):
1988
Summary:
to obtain lake sediment cores, peat samples, and tree-ring cores in the Kazan river region to examine the postglacial history of the northern treeline in this region...
Principal Investigator:MacDonald, Glen M Licensed Year(s):1989
1988
Summary:
to obtain lake sediment cores, samples of pine needles, cones and seeds, and tree-ring cores from 10 sites along the Mackenzie River between Norman Wells and Fort Simpson in order to document the chronology of pine migration into the Mackenzie Valley following the last ice-age and to test hypotheses regarding postglacial history of northern plants and distributions of genetic diversity...
Principal Investigator:MacDonald, Glen M Licensed Year(s):
1987
Summary:
To use fossil pollen and plant macrofossils from small lakes to reconstruct the response of plant populations in the treeline zone to climatic change. Modern pollen surface samples from small lakes in the treeline zone will be collected to aoid in the interpretation of the fossil pollen samples. The study area will include the boreal forest, forest-tundra and tundra zones near Yellowknife (115 W...
Principal Investigator:MacDonald, Glen M Licensed Year(s):
1985
Summary:
To collect surface samples from small lakes to reconstruct the response of plant populations in the treeline zone to climatic change....