期刊
GEOPHYSICAL RESEARCH LETTERS
卷 44, 期 18, 页码 9341-9349出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2017GL074186
关键词
peatland; wildfire; evapotranspiration; resilience; temperature; water repellency
资金
- Syncrude Canada Ltd
- Canadian Natural Resources Ltd [SCL4600100599]
- Natural Sciences and Engineering Research Council of Canada [NSERC-CRD CRDPJ477235-14]
- Canadian Foundation for Innovation
- Campus Alberta Innovates Program (CAIP) laboratory
Boreal peatlands may be vulnerable to projected changes in the wildfire regime under future climates. Extreme drying during the sensitive postfire period may exceed peatland ecohydrological resilience, triggering long-term degradation of these globally significant carbon stocks. Despite these concerns, we show low peatland evapotranspiration at both the plot- and landscape-scale postfire, in water-limited peatlands dominated by feather moss that are ubiquitous across continental western Canada. Low postfire evapotranspiration enhances the resilience of carbon stocks in such peatlands to wildfire disturbance and reinforces their function as a regional source of water. Near-surface water repellency may provide an important, previously unexplored, regulator of peatland evapotranspiration that can induce low evapotranspiration in the initial postfire years by restricting the supply of water to the peat surface.
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