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Changes in the composition and structure of Mediterranean rocky-shore communities following a gradient of nutrient enrichment: Descriptive study and test of proposed methods to assess water quality regarding macroalgae.

AuthorsArévalo, Raquel ; Pinedo, Susana ; Ballesteros, Enric
KeywordsEuropean Water Framework Directive
Nutrient enrichment
Biological indicators
Issue Date2007
CitationMarine Pollution Bulletin 55(1–6) : 104–113 (2007)
AbstractChanges in the species composition and structure of Mediterranean macroalgal-dominated communities from the upper sublittoral zone are described along agradient of nutrient enrichment coming from a urban sewage outfall. Ulva-dominated communities only appear close to the sewage outfall. Corallina-dominated communities replace ulvacean algae at intermediate levels of nutrient enrichment. Cystoseira-dominated communities thrive in the reference site but already appear at nutrient levels that are threefold higher than those reported from unpolluted sites. Assemblage variability of Cystoseira-dominated communities decreases along the gradient of nutrient enrichment. Methods based on the functional-form groups of macroalgae to assess the waterquality provide equivocal results at intermediate levels of nutrient enrichment because species belonging to the same group can display a completely different response to pollution. Alternatively, methods based on indicator species showed correlated evidence among species abundances and pollution levels and seem to have better performances in waterquality assessment.
Description10 páginas, 4 tablas, 5 figuras.
Publisher version (URL)http://dx.doi.org/10.1016/j.marpolbul.2006.08.023
Appears in Collections:(CEAB) Artículos
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