HYDROLOGICAL FUNCTION OF A MOUNTAIN FEN AT LOW ELEVATION UNDER DRY CONDITIONS
作者： Stephanie C. Streich , Cherie J. Westbrook
DOI: 10.1002/HYP.13579
关键词:
摘要: Mountain fens are limited in their spatial extent but vital ecosystems for biodiversity, habitat, and carbon water cycling. Studies of fen hydrological function northern regions indicate the timing magnitude runoff is variable, with atmospheric environmental conditions playing key roles production. How complex ecohydrological processes mountain that govern storage release as well peat accumulation will respond to a warmer less snowy future climate unclear. To provide insight, we studied Sibbald fen, located at low end known elevation range Canadian Rocky Mountains, over dry period. We added an evapotranspiration Spence method better account loss. When frozen spring early summer, primarily transmits water. thawed, fen's switches from transmission release, leading summertime table decline nearly 1 m. Rainfall events larger than 5 mm can transiently switch storage, followed by contribution, depending on antecedent conditions. The was dominant only brief period late June July when rainfall ground still partially frozen, even though accounted largest loss system. This research highlights mechanisms which peatlands supply baseflow during drought conditions, importance regulating function. study has important implications sustainability under change.
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