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Closed Access item 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.

Authors:Arévalo, Raquel
Pinedo, Susana
Ballesteros, Enric
Keywords:European Water Framework Directive, Mediterranean, Macroalgae, Nutrient enrichment, Biological indicators
Issue Date:2007
Citation:Marine Pollution Bulletin 55(1–6) : 104–113 (2007)
Abstract:Changes 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.
Description:10 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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