The Influence of Sewage PolluTIon on PolychaeTeS aSSocIaTed wITh MuSSel BedS of The SouThern roManIan Black Sea coaST
نویسنده
چکیده
A study of the response of the polychaete community associated with the rocky mussel beds to a sewage discharge was carried out in the area of Eforie Sud during summer 2005 and summer 2006. Three stations and a control site were randomly sampled around the Eforie Sud effluent. In each station water quality variables were also measured. A total of 15 species were encountered. The most impacted station, situated at the effluent, had the lowest species richness and diversity. Here only Alitta succinea (Frey & Leuckart, 1847) and Polydora websteri Hartman, 1943 were present. These two opportunistic species peaked at the station nearest to the effluent, where low inter-specific competition for food and space and high organic matter input prevailed. The control station, situated 5 km from the effluent, had the highest number of species, diversity and evenness. In this site dominant species were Salvatoria clavata (Claparède, 1863) and Platynereis dumerilii (Audouin & Milne-Edwards, 1833). Uniand multivariate methods were employed to assess the degree of sewage-induced disturbance on the rocky mussel community. The distribution pattern of the polychaete community was governed especially by pH and dissolved oxygen concentration.
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