NWT RESEARCH DATABASE

Principal Investigator: Kruse, Stefan
Licensed Year(s): 2024 2023
Summary: This licence has been issued for the scientific research application No. 5947. The aim is to monitor vegetation changes in current climate warming for simulating past and future dynamics with an individual-based spatially explicit model (LAVESI). Therefore, our intentions are: 1. assessing stand inventories at diverse bioclimatic and environmental settings by a space-for-time approach 2. gat...

Principal Investigator: Baltzer, Jennifer L
Licensed Year(s): 2017 2016
Summary: The objective is to determine the growth and recruitment responses of trees and shrubs to changing climate conditions near tree line and improve the understanding of the drivers of shrub patch expansion on the tundra. Ten shrub patches were selected for measurement and paired permanent monitoring plots were established at each patch; one plot was centred on the patch of interest, the other on t...

Principal Investigator: Kokelj, Steven V
Licensed Year(s): 2012 2011 2010 2009 2008 2007 2006 2005
Summary: “Environmental Studies across Treeline (ESAT) in the Mackenzie Delta region” is a northern based collaborative program with an objective to enhance the understanding of environmental conditions in the Mackenzie Delta region through scientific studies and monitoring. Specific studies include: 1) monitoring permafrost conditions in the Mackenzie Delta region; 2) examining freeze-back of the active l...

Principal Investigator: Henry, Greg H R
Licensed Year(s): 2009 2008
Summary: This license has been issued for the scientific research application #868. The objectives of this research are to determine what changes have occurred in spruce trees near the treeline in response to the warming climate of the Mackenzie Delta region over the past 20-50 years. The researchers will visit sites measured in the early 1990s and repeat the same measurements, which will allow them to ...

Principal Investigator: Henry, Greg H. R.
Licensed Year(s): 1995 1994 1993 1991
Summary: The researchers will measure various parts of the trees and take seed samples found on tree islands. They will take small cores from the base of the largest stems to determine age and growth rates. The tree rings can show how well the tress were growing in the past, and this can be related to changes in the climate....

Principal Investigator: Nichols, Harvey
Licensed Year(s): 1993
Summary: 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...

Principal Investigator: Pearce, Cheryl M.
Licensed Year(s): 1993 1992 1991 1990
Summary: The researcher will complete the intensive sampling of the Arctic Coastal Plain west of Shallow Bay on the Mackenzie River Delta to the Alaska border, where tundra surfaces could differ from those east of the Mackenzie Delta, high arctic tundra on northern Cape Bathurst, and additional treeline sites between Inuvik and the Horton River....

Principal Investigator: Olsen, Sue K.
Licensed Year(s): 1992
Summary: The experiment will determine the interacting effects of fire severity, soil moisture and air temperature treatments on the emergence, winter survival and initial growth of treeline and near treeline tree species. The availability and viability of tree seed for successful regeneration of the treeline and near-treeline tree species will also be determined....

Principal Investigator: Landhaeusser, Simon M.
Licensed Year(s): 1992 1991 1990
Summary: To determine the maximum size of treeline tree species in a burned and unburned valley in the Caribou Hills, the mass of standing trees on different slopes and aspects will be estimated and related to the energy input. In 1992 the plots prepared in 1990 and planted and seeded in 1991, will be revisited and measurement of growth for the second growing season will be taken....

Principal Investigator: Luckman, B.H.
Licensed Year(s): 1989
Summary: Dr. Luckman and one assistant will look for potential sites for the Geological Survey of Canada to study global change. They will also obtain recent tree-ring chronologies from treeline sites in the Mackenzie Delta....