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مجله زیست شناسی اروپای مرکزی 2014
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  • (zooplankton communities of inter-connected sections of lower river oder (nw poland

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 795
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    • شماره تماس دبیرخانه رویداد: -
     the aim of this study was the determination and comparative analysis of the zooplankton communities between the inter-connected sections of the lower oder river in relation to physicochemical factors. the study was performed at five sites of oder. two sites were localized in the main channel of oder (east oder), other sites were localized in the west arm of oder and at the beginning of the canal carrying the post-cooling water from the power plant, and the last site was below at the shallow channel joining the western oder with the eastern oder. at the channel site in which the two arms of the river are connected a significantly higher taxa number, abundance and biomass of crustaceans was observed than at the other sites. the taxonomic similarity index between all sites was at a rather low level. the pearson’s coefficient, multiple regression analysis and cca showed that temperature, conductivity and content of nitrates had the strongest impact on the abundance of zooplankton. thus, in lower, slowly flowing section of river oder the physico-chemical variables influenced zooplankton density. post-cooling water from the power plant influenced the zooplankton communities only in the channel discharging the waters into the river, while its influence on the zooplankton in the oder is insignificant.

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