| 摘要: |
| 用挂片法研究玄武湖周丛动物数量和生物量季节性变动,其优势种为褶累枝虫,钟形钟虫,沟钟虫,壶状臂尾轮虫和花箧臂尾轮虫。周丛原生动物数量和生物量在夏、秋季出现高峰,Ⅰ站数量最高达19952ind./cm2,生物量为296.6μg/cm2。Ⅱ站数量最高达16393ind./cm2,生物量为246.5μg/cm2。周丛轮虫在秋、冬季出现高峰,10月初Ⅰ站周丛轮虫数量为873ind./cm2,生物量为958.3μg/cm2。2月初Ⅱ站周丛轮虫数量为201ind./cm2,生物量为257μg/cm2。Ⅰ站年平均周丛动物数4661ind./cm2,年平均生物量为量为391μg/cm2;Ⅱ站周丛动物年平均数量为3037ind./cm2,年平均生物量为150.6g/cm2,因此Ⅰ站周丛动物数量和生物量都比Ⅱ站高。从指示生物的角度得出玄武湖水体富营养化程度是很严重的。 |
| 关键词: 周丛动物 季节变化 挂片法 玄武湖 |
| DOI：10.18307/1993.0308 |
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| SEASONAL CHANGES OF NUMBER AND BIOMASS OF ZOOPERIPHYTON IN XUANWU LAKE |
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Yang Liuyan, Xu Jiazhu
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Nanjing University, Nanjing 210008
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| Abstract: |
| Seasonal changes of number and biomass of zooperiphyton on suspended substrates in' Xuanwu Lake were studied. The main species are Epistylis plvcatdis,VoHicella convallaria, V orlicella campanula, Brachionus urceus and Brachionus cap suliflous. The number and the biomass of perihytic protozoan are large in summer and fall with their maximum number being 19952 ind. /cm2 and the maximum biomass 296.6/ig/cm2 in Station I, and with maximum number being 16393 ind. /cm2 and the maximum biomass 246.5pg/cm2 in Station II. The number of periphytic rotifera is large in fall and winter,with their maximum number being 873 ind. /cm2 and the maximum biomass 958.3 ng/cm2 in Station I in October and with their maximum number being 201 ind. /cm2 and the maximum biomass 257 p.g/cm2 in Station II in February. The yearly mean number for zooperiphyton is 4661 ind. /cm2 and the yearly mean biomass is 391 /ig/cm2 in Station I. The yearly mean biomass is 3037 ind. /cm2 and the yearly mean biomass is 150.6jxg/cm2 in Station II. So both the number and the biomass are larger in Station I than in Station II. According to indicative organism, the eutrophication has been very serious in Xuanwu Lake. |
| Key words: Zooperiphton suspended substrate seasonal change Xuanwu Lake |
