(Article of periodic en Anglais - 2013)

Document title

Co-development of alluvial fan surfaces and arid botanical communities, Stonewall Flat, Nevada, USA

Authors(s) and Affiliation(s)

DICKERSON R.P. (1) ; FORMAN A. (2) ; LIU T. (3) ;
(1) S.M. Stoller Corp. - Geoscience Support, Broomfield, ETATS-UNIS
(2) Gonzales-Stoller Surveillance, LLC - Environmental Surveillance, Education and Research Program, Idaho Falls, ETATS-UNIS
(3) VML Dating Lab., New York, ETATS-UNIS


Arid alluvial fan and fluvial dry wash surfaces in Stonewall Flat, Nevada, are characterized using surface geomorphic surveys, soil pits, botanical line surveys, and varnish microlamination dating techniques. Active and abandoned washes, and active fan surfaces are dominated by primary geomorphic processes of high-energy sedimentation from flash floods. Old and stable fan surfaces are dominated by lower energy secondary processes and manifest well-developed pavements, soils, and sparse coppices around widely distributed shrubs. Co-dominance of shrubs and annuals with abundant annuals between the shrubs is characteristic of surfaces transitional from primary processes to secondary processes. Stable surfaces dominated by secondary processes are characterized by woody perennials, with long-lived woody species inhabiting the oldest surfaces. Feedback mechanisms between early botanical communities and eolian deposition affect coppice and pavement development. In turn, these surface features control both the composition and distribution of botanical communities on older, more stable surfaces


Article of periodic

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

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

Millesime : 2013, vol. 38, no10 [pp. 1083-1101]

Bibliographic references : 2 p.

Collation : 8 fig., 9 tabl.



INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3336

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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