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Titolo:
Seasonal variation in nest placement by the California Gnatcatcher
Autore:
Sockman, KW;
Indirizzi:
San Diego State Univ, Dept Biol, San Diego, CA 92182 USA San Diego State Univ San Diego CA USA 92182 Biol, San Diego, CA 92182 USA
Titolo Testata:
WILSON BULLETIN
fascicolo: 4, volume: 112, anno: 2000,
pagine: 498 - 504
SICI:
0043-5643(200012)112:4<498:SVINPB>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
PREDATION; HABITAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Sockman, KW Washington State Univ, Ctr Reprod Biol, Sch Biol Sci, Pullman,WA 99164 USA Washington State Univ Pullman WA USA 99164 lman, WA 99164 USA
Citazione:
K.W. Sockman, "Seasonal variation in nest placement by the California Gnatcatcher", WILSON B, 112(4), 2000, pp. 498-504

Abstract

Nest placement of open-nesting bird species may affect risk of nest predation, nest microclimate, and reproductive success. In populations that breedin multiple habitat types and over long seasons, nest placement should vary seasonally and by habitat to compensate for seasonally changing and habitat specific environmental conditions that might affect the relationship between nest placement and reproductive success. Using data collected during 1994 and 1995, I investigated seasonal and habitat specific patterns of nestplacement in a population of California Gnatcatchers (Polioptila californica) that breeds over a 5 month period. Nest and substrate (plant in which nest is built) height increased and vegetative concealment of nests decreased seasonally, but these variables were not related to habitat type. Substrate height varied with substrate species in 1994, and use of individual substrate species varied seasonally. Reproductive phenology differed between the two major habitat types used by gnatcatchers in this study. Whether theseseasonal and habitat specific changes in nest placement are adaptive responses to changing environmental conditions that may affect reproductive success has yet to be determined.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 04:01:25