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(Article of periodic en Anglais - 2014)

Document title

Establishing soil and surficial geologic habitat criteria for presumed gypsophiles - The example of Eriogonum corymbosum var. nilesii, Mojave Desert, U.S.A.

Authors(s) and Affiliation(s)

ROBINS C.R. (1) ; BUCK B.J. (2) ; WILLIAMS A.J. (3) ;
(1) W.M. Keck Science Dept., Claremont McKenna, Pitzer and Scripps Colleges, Claremont, ETATS-UNIS
(2) Dept. of Geoscience, Univ. of Nevada, Las Vegas, ETATS-UNIS
(3) School of Life Sciences, Univ. of Nevada Las vegas, Las Vegas, ETATS-UNIS

Abstract

The AA. use soil profile data and high resolution (1:3000 scale) surficial geologic maps to identify likely edaphic controls of a rare shrub endemic to the Mojave Desert, E. corymbosum var. nilesii (LVB) habitat, potential habitat, and non-habitat distributions. They confirm gypsiferous substrates lacking hard, physical surface crusts as a boundary condition in most population clusters, but find that fine-grained, carbonate-rich soil lacking gypsum is also viable habitat, as is shallow (< 1 m) sandy alluvium overlying gypsiferous sediments. Deep (> 1 m), coarse-grained alluvium and/or surfaces with tightly interlocking desert pavement exclude LVB. These results challenge the view of this target species as a true gypsophile, however, it remains unclear whether carbonate-rich habitats represent ideal conditions or refugia. This study underscores the important merits of surficial geologic mapping and soil morphological description for ecological research, conservation, restoration, and land management in arid environments, especially gypsum soils, worldwide

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2014, no118 [pp. 9-19]

Bibliographic references : 1 p.

Collation : 6 fig.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2014.01.017

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