VINCENT, W.F.; Universit� Laval, Qu�bec: Lake ecosystems at the northern limit of high Arctic Canada: extreme sensitivity to climate change The northern coast of Ellesmere Island in the Canadian high Arctic (latitude 83N) is a region containing a variety of unique lake ecosystem types in which persistent ice plays a major role in their structure […]

HENRY, Greg H. R.; University of British Columbia: Effects of Long-term Experimental Warming on High Arctic Tundra Ecosystems Warming experiments were established in 1992 in tundra plant communities arrayed along a moisture gradient at a high arctic site on Ellesmere Island. Open-top chambers (1.8 m2 constructed of optically-neutral greenhouse fiberglass) passively warm the tundra plots […]

MARTIN, K; University of British Columbia: Constraints on reproduction in arctic and alpine birds Arctic and alpine birds live in extreme environments, with compressed breeding schedules and frequent delays or interruptions in breeding. Daily temperatures vary from below freezing to >45 degrees C, requiring both heating and cooling to maintain homeothermy. Timing of annual snow […]

PAQUET, P.C.; CLUFF, D; TAYLOR, M; NIPTANATIAK, A; MUSIANI, M; MULDER, R; WWF CANADA & University of Calgary; Government of the NWT; Government of Nunavut; Government of Nunavut; University of Calgary; Government of the NWT: Carnivores of the central Arctic: cumulative effects and conservation The worldwide decline of large and meso carnivores resulting from anthropogenic […]

RUSSELL, D. E.*; GRIFFITH, B.; KOFINAS, G. P.; Environment Canada; University of Alaska, Fairbanks; University of Alaska, Fairbanks: Caribou in a changing tundra environment There are presently over 3 million caribou occupying taiga and tundra ranges across North America. As a resource, caribou constitute the most important cultural and economic wildlife species for subsistence communities […]

HUTCHINSON, Thomas C.; Trent University, Peterborough, Canada: Can Canada fulfill its mandate for Northern Research after years of slippage? Canada occupies a substantial percentage area of the worlds northern land and marine systems, and this is in regions anticipated to show significant climate warming over the next 50 years. In international scientific groups, the need […]

HUMPHRIES, Murray M; University of Alberta: Bioenergetic prediction of climate change impacts on northern mammals Physiological ecology has revealed much about how animal physiology varies with environmental circumstances, but relatively little about how this variation, in turn, influences the distribution and abundance of animals. Completing this link will enable mechanism-based prediction of the impacts of […]

JEFFERIES, R.L.; ROCKWELL, R.F.; UNIVERSITY OF TORONTO; AMERICAN MUSEUM OF NATURAL HISTORY: An Overabundance of Lesser Snow Geese and an Apparent Trophic Cascade In recent decades migratory geese that breed in the Arctic but overwinter in temperate regions of Northwestern Europe and North America have shown dramatic increases in numbers that appear to be linked […]

GHIRADELLA, Helen; The University at Albany: The mystery of firefly flash control Over decades of study, researchers have worked out the basic anatomy, biochemistry, and neuropharmacology of lanterns of those fireflies that can flash, turning the lantern sharply on and off. However, the actual mechanism by which this turning on and off is controlled remains […]

HANSON, Frank E.; Unvi. Md. Baltimore County: Synchronous Flashing by Asian Fireflies: Mechanisms Unmasked Fireflies in many parts of the world exhibit communal flashing with various degrees of synchrony. Those in S.E. Asia are particularly spectacular with nearly perfect synchrony and continuous displays that last for hours. For some spp., the machinery responsible for getting […]