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Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter
Published on: March 12, 2013
Moose herbivory, browse quality, and nutrient cycling in an Alaskan treeline community
Erik M Molvar1,2, R Terry Bowyer3, Victor Van Ballenberghe3
1Institute of Arctic Biology, University of Alaska Fairbanks, 99775, Fairbanks, AK, USA.
Abstract:
Moose (Alces alces) browsing on diamondleaf willow (Salix planifolia pulchra) caused significant increases in subsequent growth of stems and leaves in treeline plant communities in central Alaska, USA. Willows growing in the shade were significantly more palatable for moose than those growing in the sun. Moose density had strong effects on rates of nutrient cycling, ostensibly through effects of browsing and inputs from fecal and urinary nitrogen. Moose are a keystone herbivore that likely mediate rates of nutrient cycling in northern ecosystems.
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