Forage variation in brood‐rearing areas used by pacific black brant geese on the Yukon‐Kuskokwim delta, Alaska

摘要: 1  We investigated the effects of grazing by black brant geese on Carex subspathacea lawns Yukon-Kuskokwim delta, Alaska. 2  We compared variation in growth and forage quality both grazed temporarily exclosed sites to determine responses C. at landscape scales within two nesting colonies that had experienced different population dynamics over recent decades. 3  Landscapes differed quality, patterns, effect characteristics. We found no net above-ground primary productivity (NAPP) a wide range natural intensities scale. 4  No differences NAPP, or response rates pressures could be detected between colonies. This suggests goose does not have deleterious this ecosystem. 5  It has been suggested gosling are sensitive seasonal declines availability quality. Spatial per sampled area exceeded these characteristics is likely dramatic recruitment rates.