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SCI论文目录 |
Effects of silver carp density on zooplankton and water quality:
Implications for eutrophic lakes in China
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| 出 版 社：Journal of Freshwater Ecology [J. Freshwat. Ecol.]. |
| 发表时间：1999 |
| 台 站：
东湖湖泊生态系统试验站
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| 作 者： Wu, L; Xie, P; Dai, M; Wang, J |
| 点 击 率：2509 |
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| 关 键 字：null |
| 摘 要：null |
| 关 键 字(英文)：null |
摘 要(英文)：The responses of zooplankton community, water transparency,
chlorophyll a and nutrients to manipulation of density of silver
carp (Hypophthyalmichthys molitrix) were examined in a one-way
factorial experiment using enclosures placed in Donghu (East
Lake), located in Wuhan, P.R. China. Enclosures (18.75 m
super(3))were treated with four silver carp densities, 0, 81, 225,
485 g/m super(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
super(2). No significant effects were found of silver carp density
on chlorophyll a, total phosphorus, or total nitrogen
concentrations. It is concluded that by reducing planktivorous
fish to below the current density (190 g/m super(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.
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