Persistent Identifier
|
doi:10.5683/SP3/A8ORW8 |
Previous Dataset Persistent ID
|
hdl:10864/10224 |
Publication Date
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2012-10-17 |
Title
| Climate change Impacts on Canadian Arctic Tundra ecosystems (CICAT): Interdisciplinary and multi-scale assessments |
Other Identifier
| DataCite International: http://dx.doi.org/10.5443/11401 |
Author
| Greg Henry
Alain Cuerrier
Angela Bedard-Haughn
Darwyn Coxson
Keith Egger
Michelle Garneau
Richard Farrell
Robert Grant
Wenjun Chen |
Point of Contact
|
Use email button above to contact.
Polar Data Catalogue (Canadian Cryospheric Information Network) |
Description
| At some CICAT research sites, we established experiments that simulate warming and changes in snow depth and measured the responses. Warming causes earlier flowering, greater growth and an increase in the cover of shrubs and grasses. We also examined the changes in vegetation across large areas using satellite data, and our results have shown a decrease in important winter range of the Bathurst caribou herd during the past twenty years due mainly to increases in fires. We have also made the first coordinated measurements of the amounts of carbon dioxide absorbed by tundra plants and given off by plants and soils over a variety of tundra ecosystems. We have found they all absorb more carbon dioxide than they emit during the growing season. We also found that polar desert soils are surprisingly important sources of methane, a potent greenhouse gas. How tundra vegetation and processes such as carbon dioxide fluxes respond to warming will depend on the responses of soil microorganisms, such as bacteria and fungi. These organisms control the release and availability of nutrients in the soil and hence affect the ability of plants to respond to warming. We are studying these organisms and how they are likely to respond to climate change. We are using much of our information in ecosystem models linked to CiCAT, which provide predictions of how these tundra systems are likely to change over the coming decades. The preliminary model ling indicates that tundra ecosystems will continue to absorb more carbon than they release, although there will be variation between years and between tundra types. Interviews with elders in communities have provided invaluable information on how tundra ecosystems have changed over the past decades and help direct the scientific research. School classes are also involved in monitoring vegetation change near communities, and students are learning how traditional ecological knowledge and science can be used together. Bringing together scientific knowledge with traditional/local knowledge, allows a better understanding of changes that have occurred across the landscape and prepare the Métis of the North Slave and other Aboriginal organizations for expected changes due to climate change. |
Keyword
| Traditional Knowledge
Modeling
Climate change
Vegetation
Tundra
Soils
Peatland
Carbon dioxide
Carbon
Birds |
Notes
| Type: Research Program: Notes: IPY-CICAT/ITEX
This metadata record corresponds to an IPY project. Studies completed under this research project are identified as related materials. These studies can also be retrieved using the Polar Data Catalogue. ; |
Distributor
| Polar Data Catalogue (Canadian Cryospheric Information Network) (PDC) http://www.polardata.ca/home/
|
Deposit Date
| 2012-09-26 |
Time Period
| Start Date: 2007-04-01 ; End Date: 2011-03-31 |
Related Material
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CCIN Reference No: 1071 The influence of soil microbial communities on carbon and nutrient cycling in heath tundra across the Arctic. CCIN Reference No: 10596 Increasing erect shrubs in the Canadian Eastern Arctic: a case study from Nunavik in the forest-shrub tundra transition zone. CCIN Reference No: 1514 |