The central objective of this research was to determine if there is a relationship between long-term barren-ground caribou (Rangifer tarandus) abundance and climate patterns. A long-term dataset indexing caribou abundance was obtained from the frequency of trampling scars on tree roots of black spruce (Picea mariana [Mill.] BSP) in the forest-tundra of the Northwest Territories. Samples were collected from roots of live trees along well-used migration trails in the forest tundra. The scar frequency distributions constructed from two groups of sites were dated from A.D. 1760-2000 and both groups of sites showed similar abundance patterns through time. To best determine the relation between long-term climate and the proxy caribou abundance, local climate data were needed. A series of tree-ring chronologies were used to reconstruct summer temperatures (July-August). This research demonstrated that the Arctic Oscillation was most closely correlated to summer temperature. Wavelet coherence demonstrated that the relation between caribou abundance cycles and the AOS changed from inversely related during the first two phases of the AOS, to in-phase during the final two phases of the AOS.
|Number of Pages||128|
|Country of Manufacture||India|
|Product Brand||Not defined|
|Product Packaging Info||Box|
|In The Box||1 Piece|
|Product First Available On ClickOnCare.com||2015-08-18 00:00:00|