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- W2348762059 abstract "This study has made monthly investigation on dynamic of zoobenthos community for one year after sediment dredging in Lake Yuehu,and also analyzed the relationship between zoobenthos community and environmental factors.The results indicated as follows: dredging led to nearly whole disappearing of zoobenthos,and the standing crop declined from(4 387±885) ind·m-2 before dredging to(80±21) ind·m-2.The oligochaetes became the pioneer species in the recovering process of disturbed ecologic system after dredging,and it showed two high densities in the turn of spring-summer(April) and autumn-winter(November),i.e.(1 010±209) ind·m-2and(1 538±354) ind·m-2respectively,as for chironomids,the high density(2 021±612) ind·m-2appeared in the autumn-winter,which both nearly achieved the level before dredging.The species composition was similar to before dredging,there were more dominant species compared with before dredging.Before July,Limnodrilus hoffmeisteri was the most dominant species,but Tanypus sp after July.Seasonally dynamic of diversity was consistent with oligochates,and the diversity achieved the level of before dredging in autumn-winter.Densities of oligochaetes chironomids,diversity were significantly positively correlated with DO and ZSD/ZM,but negatively with trophic factors(TN,TP,OD).It can be concluded that the seasonal dynamic of zoobenthos community was closely correlated with the life cycle(reproduce and growth) of zoobenthos after dredging.The trophic level was not the primary factor that controlled the zoobenthos density.The benthic environment after dredging was fit for zoobenthos to live in and for benthic ecologic system rebuilding." @default.
- W2348762059 created "2016-06-24" @default.
- W2348762059 creator A5070185634 @default.
- W2348762059 date "2012-01-01" @default.
- W2348762059 modified "2023-09-23" @default.
- W2348762059 title "Zoobenthos recovering process and the relations with environment after sediment dredging in Lake Yuehu" @default.
- W2348762059 hasPublicationYear "2012" @default.
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