Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/5142
Título: Combining habitat and biological characterization: ecological validation of the river habitat survey
Outros títulos: Combinando habitat y caracterizacion biologica: validacion ecologica del "river habitat survey"
Autor: Cortes, Rui Manuel
Varandas, Simone
Hughes, Samantha Jane
Ferreira, Maria Teresa
Palavras-chave: RHS
biological characterization
physical characteristics
integral ecological assessment
Data: 2008
Editora: Asociacion Iberica de Limnologia
Citação: "Limnetica". ISSN 0213-8409. 27 (1) (2008) 39-56
Resumo: The River Habitat Survey (RHS) is a widespread technique used to characterize the habitats at the fluvial sector level and to quantify the magnitude of physical disturbances. In this study we tested the ability of this method to discriminate sites along a gradient of perturbation and to analyse its relation with typological and environmental features. At the same time, a biological validation of RHS parameters was carried out by crossing the descriptors with three different aquatic communities (benthic macroinvertebrates, fish, and macrophytes). The Portuguese sector of the Douro basin was the area selected for this purposes. Ordination and classification techniques were used to achieve the objectives mentioned, after a reduction of the variables as a function of their relationships and according to their affinity. The multivariate analysis revealed that the variables associated with the river corridor were more appropriate to differentiate the sampling stations along the gradient of disturbance. However, these variables, together with the ones describing the river conditions (together with the RHS derived indices) were strongly dependent on the typological characteristics. This work shows an adequate strategy for the characterization of the fluvial habitat with biological data to obtain an integrated ecological vision.
Peer review: yes
URI: http://hdl.handle.net/10400.5/5142
ISSN: 0213-8409
Aparece nas colecções:CEF - Artigos de Revistas

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