Distribución longitudinal de Hydraenidae y Elmidae (Coleoptera) en la cuenca del río Órbigo (León, España)
- García Criado, Francisco 1
- Fernández Aláez, Margarita 1
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1
Universidad de León
info
ISSN: 0213-4039
Year of publication: 1994
Issue: 9
Pages: 37-57
Type: Article
More publications in: Orsis, organismes i sistemes: revista de botànica, zoologia i ecologia
Abstract
Making use of the distance to the source, an anylisis of the longitudinal distribution of 32 taxa of Hydraenidae and Elmidae frorn lotic environments is carried out. By means of a statistical method, the indicator species in relation to this factor have been identified. Three groups of taxa have been distinguished according to their distribution: species of upper reaches, those of lower reaches and those widely distributed. Both families are compared in terms of their longitudinal zonation; Hydraenidae have been found to be more closely related to upper reaches, whereas Elmidae show, as a whole, a wider ecological amplitude and a preference to areas near the confluence.