Assessment of the Effects of Gasoline smuggling on the Macrobenthic Structures in Laft Estuary, Qeshm Island

For this purpose, the station in the region of Laft, which gasoline smuggling in the intertidal area ,and at the same time, selected three similar stations in the Tabl area as a blank station, and were sampled seasonally from Autumn 2015  to Summer 2016. The total abundance of macrobenthos in Laft station (457/ m2) and Tabl stations (727 /m2) was concluded, and the maximum and minimum relative frequencies of macrobenthos in Laft estuary are Spiroloculina sp. (11.4%) and Tellina vernalis (3.8%), respectively, and in the tabl(blank station), this ratio is related to Cossura longocirrata (21%). and Spiroloculina sp. (9.8%).The results of the t-test showed that there were significant differences between the Laft and the Tabl stations(95% ), based on the tree chart derived from the cluster test , the studied regions in two regions can be divided into the first and second groups in terms of time.In addition, due to the correlation coefficients (Canonical Correlation) for each group, in particular at the Tabl station, the functions formed have a high separability to the resulting functions belonging to the Laft station, which can indicate the stability and more sustainability in the Tabl station macrobenthose communities than the Laft station, or, in other words, the ecological potential of the bottom of sea at Laft station is influenced by the gasoline smuggling less efficient than the Tabl station. The results of biodiversity indices changes showed in the two stations, showed that there are differences between the Marguerite, Shannon-Wiener and Simpson indices and Hill number between macrobenthose communities of the two stations(P<0.05). The maximum and minimum richness  Margalf indices were concluded in Tabl station ((3.28 (±0.12)) and Laft estuary station (1.9 (0.13)), respectively.