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Titolo:
Has the ghost of competition passed?
Autore:
Morris, DW;
Indirizzi:
Lakehead Univ, Dept Biol, Thunder Bay, ON P7B 5E1, Canada Lakehead Univ Thunder Bay ON Canada P7B 5E1 under Bay, ON P7B 5E1, Canada Lakehead Univ, Fac Forestry & Forest Environm, Thunder Bay, ON P7B 5E1, Canada Lakehead Univ Thunder Bay ON Canada P7B 5E1 under Bay, ON P7B 5E1, Canada
Titolo Testata:
EVOLUTIONARY ECOLOGY RESEARCH
fascicolo: 1, volume: 1, anno: 1999,
pagine: 3 - 20
SICI:
1522-0613(199901)1:1<3:HTGOCP>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
HABITAT SELECTION; CENSUS-DATA; COMMUNITY STRUCTURE; GERBIL ISOCLINE; FIELD-TEST; COEFFICIENTS; COEXISTENCE; MECHANISMS; SHAPE; LANDSCAPES;
Keywords:
co-existence; competition; ghost of competition; habitat selection; isocline; isodar; isoleg;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Morris, DW Lakehead Univ, Dept Biol, Thunder Bay, ON P7B 5E1, Canada Lakehead Univ Thunder Bay ON Canada P7B 5E1 ON P7B 5E1, Canada
Citazione:
D.W. Morris, "Has the ghost of competition passed?", EVOL EC RES, 1(1), 1999, pp. 3-20

Abstract

Theories of density-dependent habitat selection suggest that habitat-selecting competitors may stably co-exist in separate habitats with no competition (the ghost of competition past). The habitat distribution, and hence thevalue of the non-linear competition coefficients, depends on the joint densities of the competing species. I extend the theories to illustrate how non-linear effects arise from constant habitat-dependent competition. The habitat effect is easily estimated from census data by the use of habitat isodars (lines along which expected fitness is identical in both habitats). Theisodar solutions not only reveal the ghost of competition, they can be used as a convenient assay for conditions of stable competitive co-existence and they allow calculation of the actual competition coefficients. The shapes of empirical isoclines are in general agreement with the theoretical predictions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 06:16:05