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Relative impacts of morphological alteration to shorelines and eutrophication on littoral macroinvertebrates in Mediterranean lakes
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2015 (English)In: Freshwater Science, ISSN 2161-9549, E-ISSN 2161-9565, Vol. 34, no 2, p. 410-422Article in journal (Refereed) Published
Abstract [en]

Development of effective methods for assessing the ecological status of lakes based on littoral benthic fauna has been hampered by the lack of quantitative data on the relative impacts of key pressures on the benthic community. We used variance partitioning at 126 sites belonging to 14 natural Mediterranean lakes to analyze the pure and shared effects of eutrophication, morphological alterations, microhabitat type, lake morphometry and geographic position on the littoral macroinvertebrate community. The spatial arrangement of the sampling sites was responsible for 9.1% of the total variance in littoral benthic community composition, lake morphometry accounted for 4.3% of variation, and microhabitat type accounted for 3.9%. Communities appeared to be affected primarily by morphological alterations to lake shorelines, and their impact was 2.5 times as important as that of eutrophication. The structure of littoral benthic communities was governed by processes acting at several spatial scales from region to lake scale. Thus, several pressures and the various spatial scales at which these act should be taken into account when implementing methods of assessing lake ecological condition based on littoral benthic invertebrates. Region-specific methods for subalpine and volcanic lakes might enhance the validity of assessment of results of morphological alterations and improve management of those water resources.

Place, publisher, year, edition, pages
2015. Vol. 34, no 2, p. 410-422
National Category
Earth and Related Environmental Sciences Environmental Sciences
Identifiers
URN: urn:nbn:se:umu:diva-164792DOI: 10.1086/680523OAI: oai:DiVA.org:umu-164792DiVA, id: diva2:1367184
Available from: 2019-11-01 Created: 2019-11-01 Last updated: 2019-11-05Bibliographically approved

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Publisher's full texthttps://www.journals.uchicago.edu/doi/abs/10.1086/680523

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Pilotto, Francesca

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