期刊
ECOLOGY LETTERS
卷 22, 期 6, 页码 999-1008出版社
WILEY
DOI: 10.1111/ele.13259
关键词
Biodiversity-ecosystem functioning (B-EF); climate change impacts; drought; growth; mitigation; mortality; net aboveground biomass change; productivity; tree species diversity; warming
类别
资金
- Natural Sciences and Engineering Research Council of Canada [RGPIN-2014-0418, STPGP 506284]
- Government of Ontario
- Natural Sciences and Engineering Council of Canada
Climate and other global environmental changes are major threats to ecosystem functioning and biodiversity. However, the importance of plant diversity in mitigating the responses of functioning of natural ecosystems to long-term environmental change remains unclear. Using inventory data of boreal forests of western Canada from 1958 to 2011, we found that aboveground biomass growth increased over time in species-rich forests but decreased in species-poor forests, and importantly, aboveground biomass loss from tree mortality was smaller in species-rich than species-poor forests. A further analysis indicated that growth of species-rich (but not species-poor) forests was statistically positively associated with rising CO2, and that mortality in species-poor forests increased more as climate moisture availability decreased than it did in species-rich forests. In contrast, growth decreased and mortality increased as the climate warmed regardless of species diversity. Our results suggest that promoting high tree diversity may help reduce the climate and environmental change vulnerability of boreal forests.
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