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(Article of periodic en Anglais - 2011)

Document title

Tree establishment on bars in low-order gravel-bed mountain streams

Authors(s) and Affiliation(s)

CHARRON I. (1 2 4) ; JOHNSON E.A. (1 4) ; MARTIN Y.E. (3 4) ;
(1) Dep. of Biological Sciences, Univ., Calgary, CANADA
(2) Dep. of Geography, Planning and Environment, Concordia Univ., Québec, Montréal, CANADA
(3) Dep. of Geography, Univ., Calgary, CANADA
(4) Biogeoscience Inst., Univ., Calgary, CANADA

Abstract

This study was conducted in first- to third-order streams of Jumping Pound Creek in the Front Ranges of the Canadian Rocky Mountains, west of Calgary, Alberta, to provide an alternative explanation for patterns of tree recruitment in low order gravel-bed mountain streams that does not conform to the standard lateral accretion model of tree recruitment for larger rivers. It is suggested that vertical accretion results in sediment deposition patterns on bars that are often highly patchy. Consequently, tree species and ages are also heterogeneously distributed. Recruitment is fairly continuous on these bars and is not correlated with high water years, suggesting that even flows close to bankfull levels are capable of transporting fine sediment to the bars on which trees establish. This pattern of sediment deposition/erosion and the resulting tree recruitment and survival seem to be a result of valley confinement and the lack of lateral accretion in these smaller, mountainous channels

Source

Article of periodic

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

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

Millesime : 2011, vol. 36, no11 [pp. 1522-1533]

Bibliographic references : 38 ref.

Collation : 7 fig., 3 tabl., 1 an.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.2183

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