47 record(s) found with the tag "landscape disturbance" (multi-year projects are grouped):
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A Multi-scale Assessment of Cumulative Impacts in the Northern Mackenzie Basin
Principal Investigator: Lantz, Trevor C.
Licenced Year(s): 2016 2015 2014 2013 2012
Summary: Objective 1: To use satellite imagery (Landsat, QuickBird, InSAR, etc.) to document the rate and extent of landscape change (slumps, subsidence, vegetation change, etc.) in the northern Mackenzie Basin. To quantify landscape disturbances and vegetation regeneration patterns since 1985 the research team will obtain Landsat satellite images that will provide reflectance measurements covering a 1...


Watershed delineation of permafrost disturbance on eastern Banks Island, NWT: a geomatic approach for predicting water quality impacts
Principal Investigator: Lamoureux, Scott F
Licenced Year(s): 2015
Summary: The objective of this work is to investigate the impact of permafrost disturbance on water quality by examining varying sizes of watersheds with different magnitudes of disturbance. The impact of disturbance on water quality will be examined in a number of different research questions: 1) does watershed size impact downstream water quality where there is the same magnitude of disturbance; 2) is wa...


Effects of permafrost disturbances on terrestrial and aquatic ecosystems, Banks Island, NWT, Canada
Principal Investigator: Lacelle, Denis
Licenced Year(s): 2015
Summary: Thaw slumps are one of the most dramatic thermokarst features in permafrost regions. The number of thaw slumps on Banks Island has more than tripled in recent decades and it is likely that this change is altering terrestrial and aquatic ecosystems. This multidisciplinary research project investigates the short- (1960s-present day) and long-term (Medieval Warm Period to today) impacts of permafrost...


Evaluating the environmental impacts of permafrost mega-disturbances along the Dempster Highway, NWT
Principal Investigator: Kokelj, Steven V
Licenced Year(s): 2014 2013 2012 2011 2010
Summary: The objective of this research project is to document the extent of ecological change in impacted stream basins draining the eastern slope of the Richardson Mountains and to determine the mechanisms of slump initiation and stabilization. This study will focus on the Stoney Creek catchment, which runs parallel to the Dempster Highway and empties into the Peel River at Fort McPherson, NT. The catchm...


The cumulative impacts of rapid environmental change in the northwestern NWT: Investigating the impacts of mega-slump disturbances on terrestrial and aquatic ecosystems in the lower Peel watershed, NW
Principal Investigator: Lacelle, Denis
Licenced Year(s): 2013 2012
Summary: This is a multidisciplinary project involving communities, governments and academic researchers. The goals are to: 1) inventory and track broad scale changes in landscape disturbances; 2) determine the impacts of natural and anthropogenic disturbances on the physical and chemical characteristics and ecology of streams and rivers; 3) determine disturbance thresholds relevant to the health of stream...


Long-term ecological and geomorphological investigations in the alpine tundra of the Mackenzie Mountains, NWT
Principal Investigator: Kershaw, G. Peter
Licenced Year(s): 2016 2015 2014 2012 2010 2009 2008 2007 2006 2005 2004 2003
Summary: The objectives of this research are: 1) to determine the status of permafrost landforms. Since 1990, automated microclimate stations powered by solar cells have been operated in the study area. One station is located at each of five permafrost landforms called palsas (low peat covered mounds with permafrost cores). The stations keep a record of permafrost and near-surface temperatures. Depth of...


Investigating the Effects of Winter Overland Travel in sub-Arctic Boreal Forest
Principal Investigator: Kanigan, Julian
Licenced Year(s): 2012 2011
Summary: In discontinuous permafrost of the southern NWT, cleared transportation corridors, such as seismic lines, have recently been associated with permafrost loss, increased soil moisture and vegetation changes. Permafrost loss can lead to ground subsidence, infrastructure instability and the release of stored carbon into the atmosphere. The research team will test whether seismic lines can be construc...


Landscape scale flooding in the Great Slave Lake Plain
Principal Investigator: Armstrong, Terry
Licenced Year(s): 2014 2013 2012 2011 2010
Summary: The objectives in 2011 are to draw together multiple sources of information to: (1) examine change in lake area in this ecoregion, (2) quantify the type and amount of habitat loss or modification, (3) investigate whether recent changes are part of a longer-term cycle and evaluate the causes of this change, (4) determine a way to document and integrate local and traditional knowledge of physical an...


Chronology of Thaw Flow and Geochemistry of Associated Massive Ground Ice. Fort McPherson, Northwest Territory, Canada.
Principal Investigator: CLARK, Ian D.
Licenced Year(s): 2011 2010
Summary: In the Gwich’in Settlement Region, residents of Fort McPherson have identified the unusual size of the mega-slumps on the Peel Plateau as a serious concern to both water quality and aquatic ecosystem. In addition to research oriented objectives relevant to understanding cumulative effects of mega-slump development on the land and water of the Peel Plateau, the project team will pursue establishing...


Amendment - Hydro-ecological Responses of Arctic Tundra Lakes to Climate Change and Landscape Perturbation
Principal Investigator: Wrona, Frederick J
Licenced Year(s): 2011 2010 2009
Summary: The overall objective of this research is to improve our knowledge on present-day food webs/productivity in small Arctic pond/lake systems in order to better predict changes that could occur under changing climate. The methodology described below pertains to all research activities related to this research component dealing with fish. All other research activities related to this work were revi...


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