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Biodiversity in Enclosed Seas and Artificial Marine Habitats pp 193–217Cite as

History, ecology and trends for artificial reefs of the Ligurian sea, Italy

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Part of the book series: Developments in Hydrobiology ((DIHY,volume 193))

Abstract

From 1970 to the present 10 artificial reef sites have been developed in coastal waters of the Ligurian Sea, Italy. They range from Ventimiglia, in the west, to La Spezia, in the east, with the largest and best known reef complex being located in the Gulf of Genoa at Loano and consisting of 2,745 m3, about 5,200 t of material and covering a surface of 350 ha. Design and construction practices have advanced from an initial, unsuccessful effort that used automobile bodies (now banned) to current use of custom-designed concrete modules deployed systematically. Funding for reef construction has come since 1983. The earliest aim of reefs was as a physical barrier to protect habitats against illegal otter trawl fishing. Newer objectives include habitat restoration, enhancement of biodiversity and fishing catch, and research to test materials and designs for physical and ecological performance. Reefs also functions as environmental observation stations, with the invasive species Caulerpa taxifolia (Vahl) C. Agardh, being recorded on the reef at Alassio. For some Artificial Reefs (Ars), benthic organisms and fishes, settlement, biomass and development of community are recorded. In Loano AR, immersed in 1986, more than 150 algae species are recorded, more than 200 benthic animal species and 78 species (87 taxa) of fishes. Fifty-six species (61 taxa) of fishes are recorded by visual census, the others are caught only by trammel net and long line. Trammel catches at Loano are on average about 2.32 kg/100 m net. Comparisons among ARs reveal that age of the reef, location and presence of seagrass meadows are crucial for success. An indication of functional equivalence between ARs and natural rocky reefs is seen if both fish and sessile macrobenthos are compared. After 34 years of investigation a database comprising at least one hundred scientific articles based on research programs of up to 15 years, and other unpublished reports, provides information to guide future planning of reefs. On the basis of acquired experience, some management advice is suggested and the best design for the basic module in the Ligurian sea is described. The role of ARs, providing protection of coastal environment against the illegal otter trawling, nursery, microhabitat and food supply, while increasing biodiversity, biomass of benthos and fishes, and facilities for ecotourism, is outlined.

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Authors and Affiliations

  1. Laboratori di Biologia Marina ed Ecologia Animale, DIP.TE.RIS., Università di Genova, Corso Europa 26, 16132, Genova, Italy

    G. Relini, M. Relini, G. Palandri, S. Merello & E. Beccornia

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  1. G. Relini
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  2. M. Relini
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  3. G. Palandri
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  4. S. Merello
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  5. E. Beccornia
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Correspondence to G. Relini .

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Editors and Affiliations

  1. Laboratori di Biologia Marina ed Ecologia Animale, DIP.TE.RIS., Università di Genova, Corso Europa 26, 16132, Genova, Italy

    G. Relini

  2. Biological Sciences, University of Wales Swansea, Wallace Building, Swansea, SA2 8PP, Wales, UK

    J. Ryland (Emeritus Professor of Marine Biology) (Emeritus Professor of Marine Biology)

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Relini, G., Relini, M., Palandri, G., Merello, S., Beccornia, E. (2007). History, ecology and trends for artificial reefs of the Ligurian sea, Italy. In: Relini, G., Ryland, J. (eds) Biodiversity in Enclosed Seas and Artificial Marine Habitats. Developments in Hydrobiology, vol 193. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6156-1_17

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