Some general propositions about the study of spatial patterns of species richness

作者: Anthony P. Francis , Jeremy T. Kerr

DOI: 10.1080/11956860.1999.11682541

关键词:

摘要: Spatial patterns of species richness are very well studied, yet there is surprisingly little consensus about what factors or processes control those patterns. Hypotheses have accumulated in the literature, rather than being tested and replaced by better ones. We argue that this because most studies not designed to test hypotheses controls richness. Many weak (often non-operational variables) badly formulated they do make mutually exclusive predictions). Support for many existing largely post hoc. In contrast, correlations been used general hypotheses. The clearest over broad spatial scales polar temperate areas related variations climate. At smaller scales, consistently produc- tivity. Mechanistic predict more just would be desirable, but simple correlative testable predictions nature elegant mechanistic that, practice, no predictions. Keywords: diversity, richness, hypothesis testing, Resume : Bien que les patrons spatiaux de diversite specifique soient tres bien etudies, une vive discussion se poursuit actuellement a propos des facteurs qui ont engendres. Des explicatives s'accumulent dans la litterature scientifique au lieu d'etre testees et remplacees par meilleures Nous croyons ceci n'est guere surprenant grande majorite etudes ne vise pas tester generales. Beaucoup d'hypotheses sont trop faibles (souvent cause variables non-operationnelles) ou mal formulees (car elles permettent mutuellement exclusives) pour etre testee. D'ailleurs, preuves appuyant plusieurs en partie On deja utilise La correlation plus evidente s'observe echelle variabilite est fortement correlee avec le climat. A petite echelle, reliee frequemment productivite. entendu, mecanistes prediraient seraient appreciees. Pourtant hypothese fait testables sur terrain vaut beaucoup qu'une mecaniste elegante n'en du tout. Mots-cles diversite, richesse especes, d'hypotheses, spatiaux.

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