Co-occurrence of reintroduced and resident ungulates on a shared winter range in northwestern Canada

摘要: ABSTRACT For interspecific competition to occur species must use the same limited resources (e.g. food, habitat) and overlap in time space. Bison (Bison bison) were reintroduced southwestern Yukon, Canada, where they are sympatric with resident caribou (Rangifer tarandus), moose (Alces americanus) thinhorn sheep (Ovis dalli). Concerns from local communities regarding potential between bison ungulates prompted us test their spatial distribution for co-occurrence. In late-winter, we conducted multiple aerial surveys (n = 1–5) of 12.2 km2 cells 779) develop a presence—absence matrix (4 × 779 cells) ungulates. Randomization procedures used conduct null model analysis Community-wide indicated that community members neither segregated nor aggregated; rather, was random because did not differ simulated 50...