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Titolo:
New method for field studies on the parapatric distribution of sibling species
Autore:
Gourbiere, S; Faivre, B; Chasse, JL; Auger, P;
Indirizzi:
Univ Lyon 1, CNRS, UMR 5558, F-69622 Villeurbanne, France Univ Lyon 1 Villeurbanne France F-69622 58, F-69622 Villeurbanne, France Univ Bourgogne, Fac Sci Vie, Ecol Lab, F-21004 Dijon, France Univ Bourgogne Dijon France F-21004 Vie, Ecol Lab, F-21004 Dijon, France
Titolo Testata:
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE III-SCIENCES DE LA VIE-LIFE SCIENCES
fascicolo: 12, volume: 322, anno: 1999,
pagine: 1039 - 1050
SICI:
0764-4469(199912)322:12<1039:NMFFSO>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLICKER HYBRID ZONE; POPULATION-DYNAMICS; SPATIOTEMPORAL CHAOS; SPATIAL STRUCTURE; SEXUAL SELECTION; STABILITY; SPECIATION; HYBRIDIZATION; CONSEQUENCES; DIVERGENCE;
Keywords:
parapatric distributions; sympatric area; sibling species; Hippolais; interspecific competition; selective predation; coupled map lattice;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
70
Recensione:
Indirizzi per estratti:
Indirizzo: Gourbiere, S Univ Lyon 1, CNRS, UMR 5558, 43 Blvd Novembre 1918, F-69622 Villeurbanne, France Univ Lyon 1 43 Blvd Novembre 1918 Villeurbanne France F-69622
Citazione:
S. Gourbiere et al., "New method for field studies on the parapatric distribution of sibling species", CR AC S III, 322(12), 1999, pp. 1039-1050

Abstract

Spatial segregation (parapatry) often occurs between closely related species. The distributions of the two species are sometimes defined with a smalloverlapping zone (called a 'sympatric area') which generally shifts. Exclusion is necessary to explain the persistence and shift of such a spatial pattern. Field studies are carried out to identify the type of interaction that leads to the required exclusion. This is usually achieved by estimating competition and predation parameters to define the type of interaction strong enough to imply exclusion. But interaction parameters are estimated by quantitative methods which require prolonged observation (5-10 years). Theseestimations are thus difficult to obtain and are open to criticism becauseof the spatial and temporal variations in the biotic context. Now the study of these variations requires estimation of several other interaction parameters (for different times and sites); therefore, we are unable to discussthese criticisms from a study of realistic duration. We have, therefore, developed a faster study method using the spatial properties of the sympatric: area (width and velocity). We used a between-species competition and a predation model, spatially extended with coupled map lattice formalism (CML), to generate substitution waves corresponding to the 'moving sympatric area' and to study their spatial properties (asymptotic width and velocity). The relationships between the asymptotic width and the interaction level haddifferent shapes with competition and predation parameters. We used this difference to define a rapid study method that does not use quantitative estimations of the interaction parameters. This method is more reliable than the usual method with respect to the above criticisms. These findings may have considerable consequences for field studies of parapatry. (C) 1999 Academie des sciences/Editions scientifiques et medicales Elsevier SAS.

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Documento generato il 14/07/20 alle ore 12:36:48