Extreme streams: flow intermittency as a control on diatom communities in meltwater streams in the McMurdo Dry Valleys, Antarctica
Abstract:In the McMurdo Dry Valleys of Antarctica, stream biota is limited by the brief availability of liquid water. The benthic microbial mats harbor diatoms that have adapted to hydrologic stresses, including numerous endemic species. We found a strong relationship between diatom community composition and flow intermittency in a data set including seven streams that spanned a gradient in flow intermittency. In particular, two genera represented by numerous endemic species in Dry Valley habitats,
Document Type: Research Article
Affiliations: 1: Environmental Studies Program, Institute of Arctic and Alpine Research, University of Colorado, 1560 30th Street, Campus Box 450, Boulder, CO 80309, USA. 2: Biology Department, University of Louisiana at Lafayette, Lafayette, LA 70504, USA. 3: Division of Natural Sciences and Mathematics, East Georgia College, Swainsboro, GA 30401, USA. 4: Natural Resource Ecology Laboratory and Department of Biology, Colorado State University, Fort Collins, CO 80523, USA. 5: Department of Civil and Environmental Engineering, Institute of Arctic and Alpine Research, University of Colorado, 1560 30th Street, Campus Box 450, Boulder, CO 80309, USA.
Publication date: August 20, 2012
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