BEAVER-POND SEQUENCE MORPHOLOGY AND SEDIMENTATION IN NORTHWESTERN MONTANA |
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| Authors: | Wendy Bigler David R. Butler Richard W. Dixon |
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| Affiliation: | 1. Department of Geography , Arizona State University , Tempe, Arizona 85287;2. The James and Marilyn Lovell Center for Environmental Geography and Hazards Research , Southwest Texas State University , San Marcos, Texas 78666–4616 Tel: 512–245–7977 Fax: 512–245–9140 db25@swt.edu |
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| Abstract: | Two adjacent beaver-pond sequences of seven ponds each were examined along the eastern boundary of Glacier National Park, Montana, to determine spatial patterns and amounts of sedimentation, both within individual ponds and along pond sequences. Dams and their associated ponds were categorized into two age groups, young versus old, based on dam morphology and surface vegetation. Old ponds contained significantly more sediment than did young ponds. However, hypothesized patterns of downstream reductions in coarse-grained sediment, both within a pond and along a sequence, were not observed, nor were there any discernible patterns in sediment texture across ponds. [Key words: beaver pond, sedimentation, Rocky Mountains, Montana.] |
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