Aspect and slope influence plant community composition more than elevation across forest-tundra ecotones in subarctic Canada

摘要

Questions How does tree line community composition vary between elevations, aspects and slope angles in the alpine subarctic and what are the specific abiotic factors governing this variability? How do species richness and rates of community turnover vary from low to high elevation across the forest-tundra ecotone? What do the results indicate about future vegetation change?