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Low crested coastal defence structures on the Catalan coast of the Mediterranean Sea: How they compare with natural rocky shores Gacia, E.; Satta, M.P.; Martin, D.L. (2007). Low crested coastal defence structures on the Catalan coast of the Mediterranean Sea: How they compare with natural rocky shores. Sci. Mar. (Barc.) 71(2): 259-267 In: Scientia Marina (Barcelona). Consejo Superior de Investigaciones Científicas. Institut de Ciènces del Mar: Barcelona. ISSN 0214-8358; e-ISSN 1886-8134

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Beschikbaar in	Auteurs
VLIZ: Open access 123458 [ download pdf ]

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Trefwoorden

Composition > Community composition Epibiota MED, Eastern Mediterranean MED, Spain, Catalonia Structures > Hydraulic structures > Coastal structures > Coast defences Topographic features > Landforms > Coastal landforms > Rocky shores Catalonia [Marine Regions]; Mediterranean Sea - Eastern Basin [Marine Regions] Marien/Kust

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Auteurs		Top
Gacia, E. Satta, M.P. Martin, D.L.

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Abstract

Erosion problems in coastal zones are increasingly threatening Mediterranean shores. In tourist areas such as the Catalan coast, there has been an increasing demand for the construction of low crested structures (LCS) to maintain beaches for recreational purposes. We studied the composition of the biota from three LCS and compared it with that of nearby natural rocky shores. Our purpose was to assess the composition of the communities growing on the LCS at a regional scale and to explore potential patterns of community composition in LCS in relation to the nature of the surrounding coast (i.e. sand or rocky shore), distance from natural hard-bottom communities and orientation of the blocks within the structure. The communities growing on the LCS were similar to those from nearby natural shores but the diversity and the number of taxa was always lower. Sixty to 95% of the species present on natural rocky shores grew on LCS, and differences in the number of taxa between the natural and the artificial substrates increased with increasing distances between them. On the Catalan coast, LCS act as impoverished rocky shores that never become natural 'climax' communities.

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