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Titre du document / Document title

Cattle grazing mediates climate change impacts on ephemeral wetlands

Auteur(s) / Author(s)

PYKE Christopher R. (1) ; MARTY Jaymee (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) National Center for Ecological Analysis and Synthesis, 735 State Street, Suite 300, Santa Barbara, CA 93101-5504, ETATS-UNIS
(2) The Nature Conservancy, Cosumnes River Preserve, 13501 Franklin Boulevard, Galt, CA 95632-9014, ETATS-UNIS

Résumé / Abstract

Climate change impacts depend in large part on land-management decisions; interactions between global changes and local resource management, however, rarely have been quantified. We used a combination of experimental manipulations and simulation modeling to investigate the effects of interactions between cattle grazing and regional climate change on vernal pool communities. Data from a grazing exclosure study indicated that 3 years after the removal of grazing, ungrazed vernal pools dried an average of50 days per year earlier than grazed control pools. Modeling showed that regional climate change could also alter vernal pool hydrology. Increased temperatures and winter precipitation were predicted to increase periods of inundation. We evaluated the ecological implications of interactions between grazing and climate change for branchiopods and the California tiger salamander (Ambystoma californiense) at four sites spanning a latitudinal climate gradient. Grazing played an important role in maintaining the suitability of vernal pool hydrological conditions for fairy shrimp and salamander reproduction. The ecological importance of the interaction varied nonlinearly across the region. Our results show that grazing can confound hydrologic changes driven by climate change and play a critical role in maintaining the hydrologic suitability of vernal pools for endangered aquatic invertebrates and amphibians. These observations suggest an important limitation of impact assessments of climate change based on experiments in unmanaged ecosystems. The biophysical impacts of land management may be critical for understanding the vulnerability of ecological systems to climate change.

Revue / Journal Title

Conservation biology    ISSN  0888-8892   CODEN CBIOEF 

Source / Source

2005, vol. 19, no5, pp. 1619-1625 [7 page(s) (article)] (31 ref.)

Langue / Language

Anglais

Editeur / Publisher

Wiley-Blackwell, Hoboken, NJ, ETATS-UNIS  (1987) (Revue)

Mots-clés anglais / English Keywords

Vertebrata

;

Amphibia

;

Caudata

;

Land management

;

Ambystoma tigrinum

;

Environmental protection

;

Valley

;

Wetland

;

Climate modification

;

Browsing

;

Mots-clés français / French Keywords

Vertebrata

;

Amphibia

;

Caudata

;

Gestion foncière

;

Californie Centrale

;

Ambystoma tigrinum

;

Protection environnement

;

Vallée

;

Zone humide

;

Modification climat

;

Broutage animal

;

Mots-clés espagnols / Spanish Keywords

Vertebrata

;

Amphibia

;

Caudata

;

Ambystoma tigrinum

;

Protección medio ambiente

;

Valle

;

Zona húmeda

;

Modificación clima

;

Pacedura

;

Mots-clés d'auteur / Author Keywords

Ambystoma californiense

;

branchiopod

;

California Central Valley

;

California tiger salamander

;

impact assessment

;

land management

;

vernal pools

;

Localisation / Location

INIST-CNRS, Cote INIST : 21333, 35400013277661.0280

Nº notice refdoc (ud4) : 17172392



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