A stable-isotope approach to delineate geographical catchment areas of avian migration monitoring stations in North America.

摘要: Migration monitoring stations (MMSs) were established to provide information on population trends of North American passerines. However, apart from inferring general origins birds, there has been no way delineate geographical catchment areas sampled by MMSs. The ability resolve MMS would greatly enhance our link and constrain declines specific thereby focus conservation efforts. Here, we utilize stable-hydrogen (δD) carbon (δ13C) isotope values rectrices fall hatch-year (HY) spring adult after-second year (ASY) Swainson's Thrush (Catharus ustulatus) moving through two MMSs in Canada determine natal molting for those stations. Stable-carbon signatures provided birds. Conversely, δD good latitudinal control, this was also supported analysis feathers other species, Gray-cheeked minim...