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Relationships of benthic amphipod communities with environmental variables in the shallow waters of the Dardanelles

Ateş A.S., Sezgin M., Katagan T., Özdilek G. H., Berber S., Kolsal S., Bircan C.

Oceanological and Hydrobiological Studies

2012

Vol. 41, No. 4

36-46

The structure of the benthic amphipod assemblage and its relationship with soft-bottom characteristics (particle size, organic matter, etc.) of the coastal waters at the depths of 0-5 m at the Dardanelles, including the Turkish Straits System, was studied. A SCUBA diver took benthos and sediment samples seasonally using a quadrate system of 30×30 cm as three transects from the 8 different stations between July 2008 and April 2009. A total of 3007 individuals belonging to 50 species was reported. Among these, Corophium acutum Chevreux, 1908 had the highest dominance value (Di%=22.18) and the lowest dominance value belonged to Dexamine thea Boeck, 1861 (Di%=0.03). The highest positive correlation (rs=0.57, p<0.05) was observed between the gravel content (%) and the abundance (ind. m-2). The highest sand rate (99.59%) in the sediment was found at the Eceabat site. The lowest rate was at the Kepez Harbour station with a value of 73.01%. The highest H´ value (1.53) was recorded at the Eceabat site, and the lowest H´ value (H´=0.95) was recorded at the Gallipoli sampling station.