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Biotic drivers of s...
Biotic drivers of stream planform : implications for understanding the past and restoring the future
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- Polvi, Lina E (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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Wohl, Ellen (författare)
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(creator_code:org_t)
- 2013-06
- 2013
- Engelska.
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Ingår i: BioScience. - : Oxford University Press (OUP). - 0006-3568 .- 1525-3244. ; 63:6, s. 439-452
- Relaterad länk:
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https://academic.oup...
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visa fler...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Traditionally, stream channel planform has been viewed as a function of larger watershed and valley-scale physical variables, including valley slope, the amount of discharge, and sediment size and load. Biotic processes serve a crucial role in transforming channel planform among straight, braided, meandering, and anabranching styles by increasing stream-bank stability and the probability of avulsions, creating stable multithread (anabranching) channels, and affecting sedimentation dynamics. We review the role of riparian vegetation and channel-spanning obstructions-beaver dams and logjams-in altering channel-floodplain dynamics in the southern Rocky Mountains, and we present channel planform scenarios for combinations of vegetation and beaver populations or old-growth forest that control logjam formation. These conceptual models provide understanding of historical planform variability throughout the Holocene and outline the implications for stream restoration or management in broad, low-gradient headwater valleys, which are important for storing sediment, carbon, and nutrients and for supporting a diverse riparian community.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Nyckelord
- stream planform
- riparian vegetation
- beaver
- old-growth forest
- restoration
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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