Volume 14, Issue 4 (winter 2025)
J. Aqua. Eco 2025, 14(4): 57-71 |
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Assessment the ecological status of aquatic ecosystems using AMBI and BENTIX ecological indicators in the southern part of the Caspian Sea: along the Tamishan and Glandroud rivers (Noor County). J. Aqua. Eco 2025; 14 (4) :57-71
URL: http://jae.hormozgan.ac.ir/article-1-1127-en.html
URL: http://jae.hormozgan.ac.ir/article-1-1127-en.html
Abstract: (108 Views)
The primary objective of this study was to assess the ecological status of the southern Caspian Sea coast (Noor city) using the AMBI and BENTIX indices. Invertebrate sampling was conducted at six stations situated at the mouths of the Glandroud and Tamishan rivers. These stations included near-shore, mid-shore, and offshore locations at distances of 500 m, 1000 m, and 1500 m from the coastline, respectively. Sampling was carried out using a Van Veen grab with three replicate collections at each station. The results showed that the phylum Mollusca, class Bivalvia, order Cardiida, and family Cardiidae were the most abundant, comprising 82%, 65%, 44%, and 41% of the sampled communities, respectively. Additionally, bivalves dominated in terms of both diversity and density, occurring in the majority of stations. Ecological assessments based on the AMBI index revealed that the Glandroud River was categorized as slightly disturbed, while the Tamishan River ranged from slightly disturbed to moderately disturbed. According to the BENTIX index, the Glandroud River was classified as moderately to slightly disturbed, while the Tamishan River was classified as disturbed. A comparative analysis using the AMBI index indicated that the Tamishan River exhibited higher pollution levels, leading to a higher prevalence of resistant and opportunistic species at those stations.
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