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Spatio-temporal distributions of zoobenthos in soft substratum of Izmir Bay (Aegean Sea, eastern Mediterranean), with special emphasis on alien species and ecological quality status

Published online by Cambridge University Press:  30 March 2012

Melıh Ertan Çinar ,
Tuncer Katagan ,
Bılal Öztürk ,
Kerem Bakir ,
Ertan Dagli ,
Sermın Açik ,
Alper Dogan  and
Banu Bıtlıs
Melıh Ertan Çinar*
Affiliation:
Ege University, Faculty of Fisheries, Department of Hydrobiology, 35100, Bornova, Izmir, Turkey
Tuncer Katagan
Affiliation:
Ege University, Faculty of Fisheries, Department of Hydrobiology, 35100, Bornova, Izmir, Turkey
Bılal Öztürk
Affiliation:
Ege University, Faculty of Fisheries, Department of Hydrobiology, 35100, Bornova, Izmir, Turkey
Kerem Bakir
Affiliation:
Ege University, Faculty of Fisheries, Department of Hydrobiology, 35100, Bornova, Izmir, Turkey
Ertan Dagli
Affiliation:
Ege University, Faculty of Fisheries, Department of Hydrobiology, 35100, Bornova, Izmir, Turkey
Sermın Açik
Affiliation:
Dokuz Eylul University, Institute of Marine Sciences and Technology, Inciralti, 35340, Izmir, Turkey
Alper Dogan
Affiliation:
Ege University, Faculty of Fisheries, Department of Hydrobiology, 35100, Bornova, Izmir, Turkey
Banu Bıtlıs
Affiliation:
Çanakkale 18 Mart University, Faculty of Fisheries, Department of Hydrobiology, Çanakkale, Turkey
*
Correspondence should be addressed to: M.E. Çinar, Ege University, Faculty of Fisheries, Department of Hydrobiology, 35100, Bornova, Izmir, Turkey email: [email protected]
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Abstract

The soft-bottom zoobenthic community structure of Izmir Bay was examined seasonally at eight stations (depth-range: 19–67 m) in 2009. A total of 427 species were found. Polychaeta had the highest number of species (50% of total species) and individuals (75%), whereas Echinodermata possessed the highest biomass (47%). The number of species varied from 3 to 79 (0.1 m−2), the density from 60 to 5360 ind.m−2, and the biomass from 1 to 530 g.m−2. The most numerically dominant species were the polychaetes Aricidea claudiae, Streblospio gynobranchiata, Levinsenia demiri and Sternaspis scutata. The distribution of zoobenthos was strongly related to spatial differences in total organic carbon, sediment texture and depth among different regions of the bay rather than temporal differences among seasons. However, significant seasonal variability in community structure (mainly differences in the relative abundance of species) was present. The inner region of the bay can be classified as ‘poor’ or ‘bad’ based on the results of biotic indices (H′, AMBI, m-AMBI and BENTIX). Among biotic indices, only H′ and m-AMBI appeared to be capable of explaining the bay's benthic quality status. Thirteen alien species were also found. Streblospio gynobranchiata, Prionospio pulchra, Pseudopolydora paucibranchiata and Polydora cornuta formed dense populations in the inner most polluted part of the bay and are considered to be new pollution indicator species in the eastern Mediterranean Sea.

Keywords

benthic communityecological quality statusalien speciespollutionenvironmental factorsAegean Sea
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 92 , Issue 7 , November 2012 , pp. 1457 - 1477
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012

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