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Article Dans Une Revue Journal of Ecology Année : 1990

The plant community as a niche bioassay: Environmental correlates of local variation in Gypsophila fastigiata

Wolfgang Cramer

Résumé

Quantitative plant community composition was used as bioassay of niche in a study of fine-scale niche differentiation in the perennial herb Gypsophila fastigiata on the Baltic island of Oland [Sweden]. Canonical correspondence analysis was used to investigate the relationship between genetic (allozyme) and phenotypic (seed morphological) variation and niche variation. There were significant correlations between electrophoretic variation at the PGI-2 locus and fine-scale gradients of compositional change in the limestone grassland plant communities occupied by G. fastigiata. In contrast, variation at the AAT-3 and IDH loci and in seed phenotype showed no significant correlations with plant community composition. The bioassay approach to niche description integrates the interating abiotic and biotic components of niche and provides a practical means of quantifying the realized niche of individuals in natural plant populations. This approach to niche description should have wide potential applications in studies which attempt to explain the extent to which genetic variation in natural populations can be related to niche variation.
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hal-01788318 , version 1 (12-09-2022)

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Paternité - Pas d'utilisation commerciale

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Honor Prentice, Wolfgang Cramer. The plant community as a niche bioassay: Environmental correlates of local variation in Gypsophila fastigiata. Journal of Ecology, 1990, 78 (2), pp.313-325. ⟨10.2307/2261114⟩. ⟨hal-01788318⟩

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