ISSN: 2155-9910

Journal of Marine Science: Research & Development
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Research Article

Marine caves of the Southern Tyrrhenian Sea: a First Census of Benthic Biodiversity

Gianfranco Scotti1, Pierpaolo Consoli1, Valentina Esposito1,2*, Renato Chemello3, Teresa Romeo1 and Franco Andaloro1

1ISPRA (Institute for Environmental Protection and Research), Department of environmental monitoring and protection and biodiversity conservation, Italy

2Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Sezione Oceanografia, Italy

3Department of Earth and Marine Sciences, University of Palermo, Italy

Corresponding Author:
Valentina Esposito
ISPRA, Department of environmental monitoring and protection and biodiversity conservation
Via dei Mille 46, 98057 Milazzo, ME, Italy
Tel: +39 0650074063
Fax: +39 0909241832
E-mail: valentina.esposito@isprambiente.it

Received Date: June 28, 2017; Accepted Date: September 13, 2017; Published Date: September 15, 2017

Citation: Scotti G, Consoli P, Esposito V, Chemello R, RomeoT, et al. (2017) Marine caves of the Southern Tyrrhenian Sea: a First Census of Benthic Biodiversity. J Marine Sci Res Dev 7:238. doi:10.4172/2155-9910.1000238

Copyright: © 2017 Scotti G, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

This is the first paper documenting research on a selection of marine caves located along the coast of Capo Milazzo in the southern Tyrrhenian Sea. Three submarine and one semi-submerged caves were surveyed and sampled using underwater photo sampling. Surveys have only taken into account the sessile species belonging to the main taxa: Porifera, Anthozoa, Bryozoa and Polychaeta. Diversity indices and abundances were calculated for three sections within each explored cave: the Entrance Zone, Intermediate Zone and Bottom Zone. The richest group was Porifera with 21 taxa, followed by cnidarians, (Anthozoa), with 8 taxa, Polychaeta (5 taxa), and Bryozoa (5 taxa). Among Porifera, the presence of Petrobiona massiliana, a protected species according to SPA/BIO Protocol and the Bern Convention, must be highlighted. The encrusting forms were dominant in the Bottom Zone, the massive forms in the Intermediate Zone and the arborescent forms in the Entrance Zone. Generally, the percentage coverage of each morphological group showed a decline in the Intermediate Zone and a general increase in the Dark Zone within each cave. The S, H’ and J values showed different trends in the five caves. These differences, also evidenced by Permanova analysis, depend on the topographic specificity of each cave which, in turn, affects the gradients of the biotic and abiotic parameters. Finally, no horizontal gradient of rarefaction of the benthic sessile fauna has been detected. This study represents an important step for the management and conservation practices of these fragile ecosystems, especially in view of the forthcoming establishment of the Marine Protected Area.

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Citations : 3189

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