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首页> 外文期刊>Mesopotamia Environmental Journal >Assessment of eutrophication and organic pollution status of Shatt Al-Arab River by using diatom indices
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Assessment of eutrophication and organic pollution status of Shatt Al-Arab River by using diatom indices

机译：利用硅藻指数评估沙特阿拉伯河的富营养化和有机污染状况

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Many fish cages have been established along Shatt Al-Arab River by Directorate of Basrah agriculture inwhich the synthetic food supplied to fish may contribute in entrance of organic materials into Shatt Al-Arabwater and it might be distributed for a wide distants by tide and waves. So, the present study was conductedto assess the environmental affect of fish cages on Basrah?s Rivers. Four diatom indices were applied so asto assessment the potential impact of fish cages on water quality (trophic & organic pollution) at the studiedsites. They are: Polluton tolerance index (PTI); Watanebe diatom index (DAIpo); Saprobic index (S) &biological diatom index (IBD). Diatom indices values except DAIPO ones showed that the studied siteswere neither very clean nor severe polluted during the study period. PTI values indicated ecological statusranged from beta-mesosaprobic condition to alpha-mesosaprobic one for the studied sites. DAIpo valuesindicated good conditions for all sites. IBD values indicated ecological status ranged from good to badcondition. S values indicated ecological status ranged from beta-mesosaprobic condition to alphamesosaprobicone. In conclusion, our results showed that DAIPO was unsuitable as an index of trophic andsaprobity status because its calculation comprised few number of diatom taxa that represent tracepercentage of the total abundance of diatom. Both PTI and IBD indices indicated to the presence ofeutrophication phenomenon resulting from self-purification process. While Saprobic index gives anobvious picture of the organic & trophic status for the studied sites.
机译：巴士拉农业局在沙特阿拉伯河沿岸建立了许多鱼笼，其中供应给鱼类的合成食品可能有助于有机物质进入沙特阿拉伯水域，并可能在潮汐和海浪中广泛分布。因此，本研究旨在评估鱼笼对巴士拉河的环境影响。应用了四个硅藻指数，以评估研究地点鱼笼对水质的潜在影响（营养和有机污染）。它们是：污染耐受指数（PTI）;渡边硅藻指数（DAIpo）;腐生指数（S）和生物硅藻指数（IBD）。除DAIPO以外的硅藻指数值表明，在研究期间，所研究的场地既不是非常干净也不是严重污染。 PTI值表明所研究地点的生态状况从β-中异丙酸到α-中异丙酸。 DAIpo值表明所有站点都处于良好状态。 IBD值表明生态状况从好到坏。 S值表示生态状态，范围从β-中异波藻状态到α-中异波藻酮。总而言之，我们的结果表明DAIPO不适合作为营养和多汁状态的指标，因为它的计算包含很少数量的硅藻类群，占硅藻总丰度的百分比。 PTI和IBD指数均表明存在由于自纯化过程引起的富营养化现象。腐殖质指数清晰地显示了所研究地点的有机和营养状态。

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