Titre du document / Document title

Avian communities in baylands and artificial salt evaporation ponds of the San Francisco Bay estuary

Auteur(s) / Author(s)

TAKEKAWA John Y. ⁽¹⁾ ; LU Corinna T. ^{(1 2)} ; PRATT Ruth T. ⁽³⁾ ;

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

⁽¹⁾ U.S. Geological Survey, Western Ecological Research Center, San Francisco Bay Estuary Field Station, P.O. Box 2012, Vallejo, CA 94592, ETATS-UNIS
⁽²⁾ U.S. Geological Survey, California Cooperative Research Unit, Humboldt State University, Arcata, CA 95521, ETATS-UNIS
⁽³⁾ U.S. Fish and Wildlife Service, Ecological Services, Endangered Species Branch, P.O. Box 2012, Vallejo, CA 94592, ETATS-UNIS

Résumé / Abstract

San Francisco Bay wetlands, seasonal and tidal marshes between the historic low and high tide lines, are now highly fragmented because of development during the past 150 years. Artificial salt pond systems in the Bay are hypersaline and typically support simple assemblages of algae and invertebrates. In order to establish the value of salt ponds for migratory waterbirds, we used datasets to conduct a meta-analysis of avian communities in the baylands and salt ponds of San Pablo Bay. Fifty-three species of waterbirds in the salt ponds represented six foraging guilds: surface feeders, shallow probers, deep prohers, dabblers, diving benthivores and piscivores. The total number of species and the Shannon-Weiner diversity index was higher in baylands than in salt ponds during all four seasons. However, overall bird density (number/ha) was higher in salt ponds compared with baylands in the winter and spring, primarily because of large concentrations of benthivores. Cessation of salt production in 1993 and subsequent reduction in water depth resulted in a decline of some diving duck populations that used the salt ponds.

Revue / Journal Title

Hydrobiologia   ISSN 0018-8158   CODEN HYDRB8 

Source / Source

Congrès
International Conference on Salt Lakes N^o7, Death Valley National Park, CA , ETATS-UNIS (09/1999)
2001, vol. 466 (352 p.)  (28 ref.), pp. 317-328

Langue / Language

Anglais

Editeur / Publisher

Springer, Dordrecht, PAYS-BAS  (1948) (Revue)

Mots-clés anglais / English Keywords

Vertebrata ; Thallophyta ; Brackish water environment ; America ; North America ; United States ; San Francisco Bay ; Aves ; Algae ; California ; Salt pond ; Wetland ; Spatial variation ; Interannual variation ; Seasonal variation ; Population density ; Biodiversity ; Foraging behavior ; Migratory ; Guild ; Community structure ; Animal community ; Waterfowl ;

Mots-clés français / French Keywords

Vertebrata ; Thallophyta ; Milieu saumâtre ; Amérique ; Amérique du Nord ; Etats Unis ; Baie San Francisco ; Aves ; Algae ; Californie ; Marais salant ; Zone humide ; Variation spatiale ; Variation interannuelle ; Variation saisonnière ; Densité population ; Diversité biologique ; Comportement approvisionnement ; Migrateur ; Guilde ; Structure communauté ; Communauté animale ; Oiseau aquatique ;

Mots-clés espagnols / Spanish Keywords

Vertebrata ; Thallophyta ; Medio salobre ; America ; America del norte ; Estados Unidos ; Aves ; Algae ; California ; Salina ; Zona húmeda ; Variación espacial ; Variación interanual ; Variación estacional ; Densidad población ; Diversidad biológica ; Conducta abastecimiento ; Migratorio ; Estructura comunidad ; Comunidad animal ; Aves acuáticas ;

Localisation / Location

INIST-CNRS, Cote INIST : 5329, 35400010083765.0290