Base de données de recherche des TNO

chercheur principal: Gajewski, Konrad
Année(s) de permis: 2008 2004 2001 1994 1993 1992 1991 1990
Résumé: This ongoing project examines how vegetation has changed in response to changes in climate. I am using the history of vegetation, as recorded by the fossilized pollen that is present in lake sediments, to determine how vegetation in the arctic has changed over thousands of years. Fossilized pollen is collected by taking core samples from lake bottoms on Prince of Wales and Bathurst Islands. Pre...

chercheur principal: Jette, Helene
Année(s) de permis: 1995 1993 1992
Résumé: This project continues to examine the history of plant communities in the Mackenzie River and Delta regions over the past 15,000 years. Using a hand auger, core samples of sediments are taken from lake bottoms and the sediments are analyzed for the presence of pollen and diatoms. Radiocarbon dating, a technique used to estimate age, will estimate when certain species were present in the past....

chercheur principal: Basinger, James F.
Année(s) de permis: 1994 1993 1992 1991 1990 1989 1988 1987
Résumé: Begun in 1985, this project will continue the study of plant evolution in high latitudes and the exploration for fossils in rocks of the Eureka Sound Group of Axel Heiberg and Ellesmere Islands. This season the field work will expand to Strathcona Fiord area and to east central Axel Heiberg Island. This information is used in the interpretation of global climatic change and the evolution of temper...

chercheur principal: Roy, Alain P.
Année(s) de permis: 1990 1989
Résumé: Mr. Roy will carry out field work at two different sites, specifically, Macmillan Pass and Tungsten. At each site he will examine two main items, the vegetation and the soil Dryas specimens will be collected, he will examine the other plants of the community and a small soil sample approximately 200 grams will be taken....

chercheur principal: MacDonald, Glen M
Année(s) de permis: 1989 1988
Résumé: Dr. Glen MacDonald and his team will be obtaining lake sediment cores, samples of pine needles, cones, seeds and tree-ring cores from 2 sites near Hay River. Fossil pollen from the sediment will be used to document the chronology of pine migration into the NWT following the last ice-age. The study will be used to understand postglacial history of northern plants....

chercheur principal: Smith, Derald
Année(s) de permis: 1988
Résumé: Dr. Smith and his two students are trying to find out the extent of a glacial lake that once stretched from the Redstone River to Fort Good Hope. They are collecting samples of ancient, buried plant material from river cutbanks to see how old these deposits are and to determine what kinds of plants once grew along the western shores of the lake long ago....

chercheur principal: Andrews, John T.
Année(s) de permis: 1988 1987
Résumé: To obtain a series of lake cores from outer Iqaluit, Baffin Island, NWT, from ca. 100 m. above sea level down to sea level; examine the cores for changes in the diatom floras which respond to shifts in the pH of the water and salinity, as well as samples for radiocarbon dating and pollen analysis....

chercheur principal: Ritchie, J.C.
Année(s) de permis: 1988 1987
Résumé: The sampling of lake sediment for subsequent laboratory analysis of pollen and other contained material, with the final aim to reconstruct postglacial vegetation and climate....

chercheur principal: Gruchy, C.G.
Année(s) de permis: 1990 1989 1988 1987
Résumé: To determine the nature and extent of several Arctic fossil forests; map stumps and logs. To remove some mummified wood for conservation research at CCI. To search for forest areas. Reconnaissance of other possible fossil forest areas and of reported Mesozoic fish locality....

chercheur principal: Basinger, James F.
Année(s) de permis: 1984
Résumé: To study the evolution of temperate floras in western and northern Canada and with the relationship between the early Tertiary age floras and those that occupy temperate regions in North America at present....