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Effects of silver carp density on zooplankton and water quality: Implications for eutrophic lakes in China
Lin Wu; Ping Xie; Mang Dai and Jian Wang; Wu, L, MT UNION COLL,DEPT BIOL,ALLIANCE,OH 44601
1997
Source PublicationJOURNAL OF FRESHWATER ECOLOGY
Volume12Issue:3Pages:437-444
AbstractWe examined the responses of zooplankton community, water transparency, chlorophyll a and nutrients to manipulation of density of silver carp (Hypophthyalmichthys molitrix) in an one-way factorial experiment using enclosures placed in Donghu (East Lake, 30 degrees 33' N, 114 degrees 23' E), located in Wuhan, P. R. China. Enclosures (18.75 m(3)) were treated with four silver carp densities, 0, 81, 225, 485 g/m(2). Total zooplankton abundance (excluding nauplii and rotifers except for Asplanchna sp.) and the mean size of dominant cladoceran species were significantly greater in enclosures with 0 and 81 fish densities than those in enclosures with 225 and 485 fish densities. Water transparency also improved significantly when silver carp densities were 0 or 81 g/m(2). We did not find significant effects of silver carp density on chlorophyll a, total phosphorus, or total nitrogen concentrations. We conclude that by reducing planktivorous fish to below the current density (190 g/m(2)), the zooplankton community can be shifted from the dominance of small-bodied Moina sp. to dominance of large-bodied Daphnia sp. Further, the water clarity can be increased.
KeywordHypophthalmichthys-molitrix
DepartmentCHINESE ACAD SCI,INST HYDROBIOL,DONGHU EXPTL STN LAKE ECOSYST,WUHAN 430072,PEOPLES R CHINA
Subject AreaEcology ; Limnology
Indexed BySCI
WOS IDWOS:A1997XT95900011
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/10258
Collection期刊论文
Corresponding AuthorWu, L, MT UNION COLL,DEPT BIOL,ALLIANCE,OH 44601
Recommended Citation
GB/T 7714
Lin Wu,Ping Xie,Mang Dai and Jian Wang,et al. Effects of silver carp density on zooplankton and water quality: Implications for eutrophic lakes in China[J]. JOURNAL OF FRESHWATER ECOLOGY,1997,12(3):437-444.
APA Lin Wu,Ping Xie,Mang Dai and Jian Wang,&Wu, L, MT UNION COLL,DEPT BIOL,ALLIANCE,OH 44601.(1997).Effects of silver carp density on zooplankton and water quality: Implications for eutrophic lakes in China.JOURNAL OF FRESHWATER ECOLOGY,12(3),437-444.
MLA Lin Wu,et al."Effects of silver carp density on zooplankton and water quality: Implications for eutrophic lakes in China".JOURNAL OF FRESHWATER ECOLOGY 12.3(1997):437-444.
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