放养鲢鱼(Hypophthalmichys molitrix C et V)对水库围隔浮游生物群落的影响
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INFLUENCE OF SILVER CARP (HYPOPHTH-ALMICHTHYSMOLITRIX C ET V) ON PLANKTON COMMUNITYIN RESERVOIR ENCLOSURES
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    摘要:

    本文研究在水库围隔实验生态系统中鲢鱼对浮游生物群落的影响。结果表明,放养鲢鱼后,浮游动物生物量、浮游植物生物量、叶绿素a和浮游植物毛产量分别下降了58.7%、63.6%、52.5%和65.0%;透明度、浮游植物群落多样性指数分别提高了18.2%、32.5%;铜绿微囊藻数量减少了90.6%“水华”得到明显抑制。但小型绿藻(<20μm)数量未出现显著变化,因而其在藻类生物量中所占比例反而提高了82.3%。围隔内可被鲢鱼滤食的大型藻类(硅藻、甲藻、隐藻和绿藻(>20μm))占藻类生物量的85.8%,因此鲢鱼的存在能明显限制浮游植物的生物量。此外,放养鲢鱼还显著降低了水体中的COD,TP,DO和pH值,这表明鲢鱼对水质有净化作用。

    Abstract:

    The ineluence of silver carp on plankton community was studied in controlled experimental enclosures in a reservoir. The results indicated that zoo-plarkton biomass, phytoplankton biomass, chlorophyll-a concentration and gross primary production were reduced by 58.7%, 63.6%, 52.5%, and 65.0% respectively, water transparency and Shannon-Weiner's diversity index of phytoplankton community were increased by 18.2% and 32.5%, when silver carp were stocked in the enclosures. In the meantime, The number of Mic-rnc...

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李琪,李德尚,熊邦喜,岳茂国,张辉.放养鲢鱼(Hypophthalmichys molitrix C et V)对水库围隔浮游生物群落的影响.生态学报,1993,13(1):30~37

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