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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%)