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(Article of periodic en Anglais - 2012)

Document title

The beaver meadow complex revisited – the role of beavers in post-glacial floodplain development

Authors(s) and Affiliation(s)

POLVI L.E. (1) ; WOHL E. (1) ;
(1) Colorado State Univ., Geosciences Campus, Fort Collins, ETATS-UNIS

Abstract

The AA. focus on 2 low-gradient broad valleys, Beaver Meadows and Moraine Park, in Rocky Mountain National Park (Colorado, USA). Both valleys experienced a dramatic decrease in beaver population in the past century. They examine the geomorphic significance of beaver-pond sediment by determining the rates and types of sedimentation since the middle Holocene and the role of beaver in driving floodplain evolution through increased channel complexity and fine sediment deposition. Channel complexity increases directly downstream of beaver dams. The increased complexity forms a positive feedback for beaver-induced sedimentation; the multi-thread channel increases potential channel length for further damming, which increases the potential area occupied by beaver ponds and the volume of fine sediment trapped. Channel complexity decreased significantly as surveyed beaver population decreased. These findings underscore the importance of understanding the historical range of variability of valley bottom processes, and implications for environmental restoration

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2012, vol. 37, no3 [pp. 332-346]

Bibliographic references : 62 ref.

Collation : 11 fig., 5 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2261

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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