Meeting Abstract

43-2  Sunday, Jan. 5 08:15 – 08:30  Climate anomalies are altering local adaptation BONTRAGER, M; MUIR, CD*; MAHONY, C; GAMBLE, DE; GERMAIN, RM; HARGREAVES, AL; KLEYNHANS, EJ; THOMPSON, KA; ANGERT, AL; University of British Columbia and University of California, Davis; University of Hawai’i; University of British Columbia; University of British Columbia; University of British Columbia; McGill University; University of British Columbia; University of British Columbia; University of British Columbia cdmuir@hawaii.edu http://cdmuir.netlify.com

Adaptation to local climate is ubiquitous, but global climate change may be generating mismatch between the conditions that populations experience and the optima to which they have evolved. This mismatch is likely to decrease individual fitness and disrupt local adaptation. We investigate these effects with a synthesis of data from 149 published transplant studies, and find that fitness declines when populations experience temperatures that deviate from their historic averages, but is not sensitive to precipitation variation. Deviations in temperature affect the magnitude of local adaptation detected in transplant experiments. The negative effects of climate anomalies on fitness and local adaptation may be an early warning sign that populations are at risk in the absence of rapid adaptation or gene flow