水蕹菜浮床对草鱼主养池塘轮虫群落结构的影响
EFFECT OF IPOMOEA AQUATICA FLOATING-BED ON THE ROTIFER COMMUNITY STRUCTURE IN GRASS CARP POND
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摘要: 研究了水蕹菜浮床对草鱼主养池塘轮虫群落结构的影响,共检出轮虫38种,隶属于2纲14属,其中浮床池塘出现轮虫36种,而非浮床池塘28种。浮床池塘与非浮床池塘的优势种组成基本类似,萼花臂尾轮虫(Brachionus calyciflorus)、裂足臂尾轮虫(Brachionus diversicornis)、裂痕龟纹轮虫(Anuraeopsis fissa)、暗小异尾轮虫(Trichocerca pusilla)以及长肢多肢轮虫(Polyarthra dolichoptera)为共有优势种;浮床池塘与非浮床池塘的轮虫平均密度分别为1892和2255 ind./L,差异极显著(p0.01);浮床池塘与非浮床池塘轮虫平均生物量分别为1.535和1.405 mg/L,差异不显著(p0.05)。结果表明,水蕹菜浮床显著促进了轮虫种类数增加,提高了轮虫多样性和均匀度,并在一定程度上减缓了轮虫小型化。Abstract: We studied the effect of Ipomoea aqucatica floating-bed on the rotifer community structure in grass carp pond from June to September in 2011. The density and biomass of rotifer, the key environmental factors in floating-bed and non-floating-bed ponds were tested. The densities of rotifer in the floating-bed pond and non-floating-bed pond were 1892 ind./L and 2255 ind./L, respectively. The densities in these two kinds of ponds were significantly different (P0.01). The biomasses of rotifer in the floating-bed pond and non-floating-bed pond were 1.535 and 1.405 mg/L, respectively. The biomasses in these two kinds of ponds were significantly different (P0.05). During the experiment, 38 species belonging to 7 families, 14 genera was detected in rotifers. Thirty-six species were detected in the floating-bed ponds rotifers, and 28 species were detected in non-floating-bed ponds. Dominant species of the two types of ponds were essentially similar, including Brachionus calyciflorus, Brachionus diversicornis, Anuraeopsis fissa, Trichocerca Pusila and Polyarthra dolichoptera. The results showed that Ipomoea aquatica floating-bed could promote the number of rotifer species significantly, improve the rotifer diversity and evenness, and inhibit the rotifers miniaturization effectively.
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Keywords:
- Rotifer /
- Ipomoea aquatica floating-bed /
- Pond /
- Community structure /
- Density /
- Biomass
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