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Table 2 Species richness and composition for the investigated sites

From: Early detection of potentially invasive invertebrate species in Mytilus galloprovincialis Lamarck, 1819 dominated communities in harbours

Sampling site Site 1 Site 2 Site 3
No. of observed species 67 58 57
No. of higher taxa 15 15 13
Monthly average no. and standard deviation of species 24 ± 5.7 20 ± 5.1 21 ± 4.9
Month of highest observed species richness January 2009 November 2009 December 2009
Month of lowest observed species richness April 2009, June 2009, March 2010 July 2010 July 2010
Taxonomic groups with high number of species Amphipoda (19%)
Polychaeta (19%)
Coelenterata (12%)
Decapoda (10%)
Polychaeta (21%)
Amphipoda (14%)
Coelenterata (12%)
Decapoda (10%)
Polychaeta (19%)
Amphipoda (18%)
Decapoda (11%)
Coelenterata (11%)