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Titolo:
Temporal variation in fitness components and population dynamics of large herbivores
Autore:
Gaillard, JM; Festa-Bianchet, M; Yoccoz, NG; Loison, A; Toigo, C;
Indirizzi:
Univ Lyon 1, UMR 5558, F-69622 Villeurbanne, France Univ Lyon 1 Villeurbanne France F-69622 58, F-69622 Villeurbanne, France Univ Sherbrooke, Dept Biol, Sherbrooke, PQ J1K 2R1, Canada Univ Sherbrooke Sherbrooke PQ Canada J1K 2R1 erbrooke, PQ J1K 2R1, Canada Norwegian Inst Nat Res, Dept Arct Ecol, Polar Environm Ctr, N-9296 Tromso,Norway Norwegian Inst Nat Res Tromso Norway N-9296 nm Ctr, N-9296 Tromso,Norway Off Natl Chasse, Div Rech & Dev, F-75017 Paris, France Off Natl Chasse Paris France F-75017 v Rech & Dev, F-75017 Paris, France
Titolo Testata:
ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS
, volume: 31, anno: 2000,
pagine: 367 - 393
SICI:
0066-4162(2000)31:<367:TVIFCA>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
WHITE-TAILED DEER; YELLOWSTONE-NATIONAL-PARK; LIFE-HISTORY CONSEQUENCES; MOUNTAIN LION PREDATION; PORCUPINE CARIBOU HERD; MOOSE ALCES-ALCES; FEMALE RED DEER; ROE DEER; JUVENILE SURVIVAL; WILD REINDEER;
Keywords:
environmental variation; density dependence; ungulates; demography; critical life-history stage; long-term studies;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
196
Recensione:
Indirizzi per estratti:
Indirizzo: Gaillard, JM Univ Lyon 1, UMR 5558, F-69622 Villeurbanne, France Univ Lyon1 Villeurbanne France F-69622 illeurbanne, France
Citazione:
J.M. Gaillard et al., "Temporal variation in fitness components and population dynamics of large herbivores", ANN R ECOL, 31, 2000, pp. 367-393

Abstract

In large-herbivore populations, environmental variation and density dependence co-occur and have similar effects on various fitness components. Our review aims to quantify the temporal variability of fitness components and examine how that variability affects changes in population growth rates. Regardless of the source of variation, adult female survival shows little year-to-year variation [coefficient of variation (CV <10%)], fecundity of prime-aged females and yearling survival rates show moderate year-to-year variation (CV <20%), and juvenile survival and fecundity of young females show strong variation (CV >30%). Old females show senescence in both survival and reproduction, These patterns of variation are independent of differences inbody mass, taxonomic group, and ecological conditions. Differences in levels of maternal care may fine-tune the temporal variation of early survival. The immature stage, despite a low relative impact on population growth rate compared with the adult stage, may be the critical component of population dynamics of large herbivores. Observed differences in temporal variation may be more important than estimated relative sensitivity or elasticity in determining the relative demographic impact of various fitness components.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 13:24:25