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Titolo:
Higher species diversity explained by stronger spatial aggregation across six neotropical Drosophila communities
Autore:
Krijger, CL; Sevenster, JG;
Indirizzi:
Leiden Univ, Inst Evolutionary & Ecol Sci, Sect Anim Ecol, NL-2300 RA Leiden, Netherlands Leiden Univ Leiden Netherlands NL-2300 RA NL-2300 RA Leiden, Netherlands Panama STRI, Smithsonian Trop Res Inst, Balboa, Panama Panama STRI Balboa Panama RI, Smithsonian Trop Res Inst, Balboa, Panama
Titolo Testata:
ECOLOGY LETTERS
fascicolo: 2, volume: 4, anno: 2001,
pagine: 106 - 115
SICI:
1461-023X(200103)4:2<106:HSDEBS>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
EPHEMERAL RESOURCE; COMPETITIVE-EXCLUSION; PATCHY ENVIRONMENT; SIMULATION-MODEL; COEXISTENCE; DIPTERA; SIZE;
Keywords:
aggregation model; community stability; disturbance; fragmented resources; interspecific competition; local diversity; saturation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Krijger, CL Leiden Univ, Inst Evolutionary & Ecol Sci, Sect Anim Ecol, POB9516, NL-2300 RA Leiden, Netherlands Leiden Univ POB 9516 Leiden Netherlands NL-2300 RA etherlands
Citazione:
C.L. Krijger e J.G. Sevenster, "Higher species diversity explained by stronger spatial aggregation across six neotropical Drosophila communities", ECOL LETT, 4(2), 2001, pp. 106-115

Abstract

Spatial aggregation of competitors over resource patches is generally accepted as an important mechanism maintaining coexistence of species in insectcommunities exploiting fragmented resources. However, its quantitative effects on local diversity, i.e. the relationship between the degree of aggregation in a community and community diversity, remain unexplored. In this paper, we tested whether stronger spatial aggregation does lead to the predicted higher local diversity. We compared six species rich Drosophila communities exploiting decaying fruits in central Panama, monitored over one full year (>25 generations). We found a clear positive relationship between the overall degree of aggregation and community diversity. In addition, aggregation over fruit trees was found to contribute greatly to the overall degreeof aggregation and was largely responsible for the observed relationship between aggregation and diversity across communities. In addition, both diversity and aggregation strength were lower in communities in disturbed habitats, which was explained by altered spatial distribution of fruiting trees. This study. shows that the aggregation model cannot only explain coexistence, but also differences in local diversity.

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Documento generato il 04/04/20 alle ore 08:44:05