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Longitudinal river zonation in the tropics: examples of fish and caddisflies from endorheic Awash river, Ethiopia

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dc.contributor.authorEnglmaier, Gernot K.
dc.contributor.authorHayes, Daniel S.
dc.contributor.authorMeulenbroek, Paul
dc.contributor.authorTerefe, Yonas
dc.contributor.authorLakew, Aschalew
dc.contributor.authorTesfaye, Genanaw
dc.contributor.authorWaidbacher, Herwig
dc.contributor.authorMalicky, Hans
dc.contributor.authorWubie, Alemayehu
dc.contributor.authorLeitner, Patrick
dc.contributor.authorGraf, Wolfram
dc.date.accessioned2020-10-02T11:11:21Z
dc.date.available2020-10-02T11:11:21Z
dc.date.issued2020
dc.descriptionPrimary Research Paperpt_PT
dc.description.abstractSpecific concepts of fluvial ecology are well studied in riverine ecosystems of the temperate zone but poorly investigated in the Afrotropical region. Hence, we examined the longitudinal zonation of fish and adult caddisfly (Trichoptera) assemblages in the endorheic Awash River (1,250 km in length), Ethiopia. We expected that species assemblages are structured along environmental gradients, reflecting the pattern of large-scale freshwater ecoregions. We applied multivariate statistical methods to test for differences in spatial species assemblage structure and identified characteristic taxa of the observed biocoenoses by indicator species analyses. Fish and caddisfly assemblages were clustered into highland and lowland communities, following the freshwater ecoregions, but separated by an ecotone with highest biodiversity. Moreover, the caddisfly results suggest separating the heterogeneous highlands into a forested and a deforested zone. Surprisingly, the Awash drainage is rather species-poor: only 11 fish (1 endemic, 2 introduced) and 28 caddisfly species (8 new records for Ethiopia) were recorded from the mainstem and its major tributaries. Nevertheless, specialized species characterize the highland forests, whereas the lowlands primarily host geographically widely distributed species. This study showed that a combined approach of fish and caddisflies is a suitable method for assessing regional characteristics of fluvial ecosystems in the tropicspt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationEnglmaier, G.K., Hayes, D.S., Meulenbroek, P. et al. Longitudinal river zonation in the tropics: examples of fish and caddisflies from the endorheic Awash River, Ethiopia. Hydrobiologia (2020)pt_PT
dc.identifier.doihttps://doi.org/10.1007/s10750-020-04400-0pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/20419
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAfricapt_PT
dc.subjectbiodiversitypt_PT
dc.subjectbiogeographypt_PT
dc.subjectspecies assemblagespt_PT
dc.subjectfreshwater ecoregionspt_PT
dc.subjectindicator speciespt_PT
dc.titleLongitudinal river zonation in the tropics: examples of fish and caddisflies from endorheic Awash river, Ethiopiapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.titleHydrobiologiapt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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