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Title: A window of opportunity for climate-change adaptation: easing tree mortality by reducing forest basal area

Author: Bradford, John B; Bell, David M;

Date: 2016

Source: Frontiers in Ecology and the Environment. 15(1): 11-17.

Publication Series: Scientific Journal (JRNL)

Description: Increasing aridity as a result of climate change is expected to exacerbate tree mortality. Reducing forest basal area – the cross-sectional area of tree stems within a given ground area – can decrease tree competition, which may reduce drought-induced tree mortality. However, neither the magnitude of expected mortality increases, nor the potential effectiveness of basal area reduction, has been quantified in dryland forests such as those of the drought-prone Southwest US. We used thousands of repeatedly measured forest plots to show that unusually warm and dry conditions are related to high tree mortality rates and that mortality is positively related to basal area. Those relationships suggest that while increasing high temperature extremes forecasted by climate models may lead to elevated tree mortality during the 21st century, future tree mortality might be partly ameliorated by reducing stand basal area. This adaptive forest management strategy may provide a window of opportunity for forest managers and policy makers to guide forest transitions to species and/or genotypes more suited to future climates.

Keywords: forest die-off, global change, drought stress, temperature extremes, forest management

Publication Notes:

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  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

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Bradford, John B; Bell, David M 2016.A window of opportunity for climate-change adaptation: easing tree mortality by reducing forest basal area. Frontiers in Ecology and the Environment. 15(1): 11-17. https://doi.org/10.1002/fee.1445.

 


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