Arctic plants are capable of sustained responses to long-term warming

Polar research

Robert D. Hollister¹  Robert T. Barrett² 

[1] West Michigan Academy of Environmental Science, 4463 Leonard Street, Walker, MI 49534, USA;Biology Department Grand Valley State University, 1 Campus Drive, Allendale, MI 49401, USA;Biology Department Grand Valley State University, 1 Campus Drive, Allendale, MI 49401, USACorrespondence

关键词: Species traits;    International Tundra Experiment;    meta-analysis;    plant–climate interactions;    tundra vegetation;    warming response.;   

DOI  :  10.3402/polar.v35.25405

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

Previous studies have shown that Arctic plants typically respond to warming with increased growth and reproductive effort and accelerated phenology, and that the magnitude of these responses is likely to change over time. We investigated the effects of long-term experimental warming on plant growth (leaf length) and reproduction (inflorescence height, reproductive phenology and reproductive effort) using 17–19 years of measurements collected as part of the International Tundra Experiment (ITEX) at sites near Barrow and Atqasuk, Alaska. During the study period, linear regressions indicated non-significant tendencies towards warming air temperatures at our study sites. Results of our meta-analyses on the effect size of experimental warming (calculated as Hedges’ d) indicated species generally responded to warming by increasing inflorescence height, increasing leaf length and flowering earlier, while reproductive effort did not respond consistently. Using weighted least-squares regressions on effect sizes, w...

【 授权许可】

CC BY-NC