سنجش غلظت فلزات سنگين روي، مس، كادميم و سرب دركيتون پوست ماري (Chiton lamyi, Dupuis, 1918) و رسوبات سطحي مناطق بين جزر و مدي استان بوشهر

Measurement of Heavy Metals (Zn, Cu, Cd, Pb) pollution in surface sediment and Chiton (Chiton lamyi,Dupuis,1918) from Rocky intertidal zones in Bushehr Province coastal waters

مطالعه حاضر به منظور بررسي ميزان آلودگي رسوبات سطحي مناطق بين جزرو مدي استان بوشهر به فلزات سنگين روي، مس، كادميم و سرب و تجمع آنها در كيتون پوست ماري در 5 ايستگاه نايبند، كلات، رستمي، هليله و بوشهر در سواحل استان بوشهر در زمستان 1389 وتابستان 1390 به انجام رسيده است. نتايج نشان داد كه الگوي غلظت فلزات سنگين در نمونه هاي رسوب، بافت نرم و بافت سخت كيتون پوست ماري به ترتيب به صورتZn>Cu>Pb>Cd و Cu>Zn>Cd>Pb ،Zn> Pb>Cu>Cd مي باشد. بين بافت نرم _رسوب ، بافت سخت _ رسوب و بافت نرم _ بافت سخت اختلاف معني داري مشاهده نشد( 05/0

This study was carried out to evaluate the level of heavy metals (Zn, Cu, Cd, Pb) concentrations in chiton (Chiton lamyi ,Dupuis,1918) and surface sediments of the intertidal zone in Bushehr province coastal waters. Ten specimens of chiton and three samples of sediment per each station were collected in March 2011 and July 2011 at five stations namely Nayband, Kalat, Rostami, Halileh and Bushehr. The results showed that the pattern of metal concentrations in sediment, soft tissue and shell were Zn>Pb>Cu>Cd, Cu>Zn>Cd>Pb and Zn>Cu>Pb>Cd respectively. There was no significant correlation during both season between metal concentrations in Soft tissueShell, Soft tissueSediment and SellSediment (p>0/05). This finding indicates that heavy metals concentration in chiton was not only influenced by their concentrations in sediment, and some other factors are involved in metal bioavailability to Chiton lamyi. Metals concentration in sediments were only above LAL level but lower than the other standard levels of heavy metals. So it seems that the studied stations are clean and not polluted with metal pollutants. Comparing concentration of heavy metals in soft tissue with some of the international standards showed that the concentration of Cu and Cd in soft tissue were above the permissible limits. So chiton may be dangerous for marine animals that feed on it. Chitons might use their shell for sequestration of a part of the uptaken cadmium.