Alien species of spionid polychaetes (Streblospio gynobranchiata and Polydora cornuta) in Izmir Bay, eastern Mediterranean

Autor:	Mary E. Petersen, Ertan Dagli, Zeki Ergen, Melih Ertan Çinar
Rok vydání:	2005
Předmět:	Mediterranean climate Biomass (ecology) Ecology Introduced species Aquatic Science Mediterranean sea Oceanography Geography Harbour Ecosystem computer Bay Hydrobiology computer.programming_language
Zdroj:	Journal of the Marine Biological Association of the United Kingdom. 85:821-827
ISSN:	1469-7769 0025-3154
DOI:	10.1017/s0025315405011768
Popis:	The present study reports the occurrence of two exotic species of polychaetes in Izmir Bay, the eastern Mediterranean: Streblospio gynobranchiata, newly reported for the Mediterranean, and Polydora cornuta. Their establishment in the area is most probably transport by ballast water since these two species greatly dominated polluted muddy bottoms near and in Alsancak Harbour. The maximum density and biomass of S. gynobranchiata in the area were 34,270 ind m−2 and 9·4 g wwt m−2, and those of P. cornuta were 3170 ind m−2 and 2·1 g wwt m−2, respectively. These two species accounted for more than 60% of total faunal populations in the majority of samples collected in winter. Both species are capable of reproducing in the area both in summer and winter. The morphological, ecological and distributional characteristics of these species as well as their impacts on the prevailing ecosystem are analysed and discussed.
Databáze:	OpenAIRE
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