| 引用本文: | 林里,周洁,黄祥飞.武汉东湖沉积物中轮虫休眠卵的分布.湖泊科学,1996,8(1):51-60. DOI:10.18307/1996.0107 |
| Lin Li,Zhou Jie,Huang Xiangfei.Distribution of resting eggs of rotifers in deposits of Donghu Lake, Wuhan. J. Lake Sci.1996,8(1):51-60. DOI:10.18307/1996.0107 |
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| 摘要: |
| 报道了1992年8月~1993年7月间武汉东湖营养类型不同的3个湖区沉积物中轮虫休眠卵的数量和分布。不论湖区营养类型如何,沉积物中的休眠卵数量均呈"V"形垂直分布,表层高,底层低,由表向底数量逐渐递减。在3个湖区中,休眠卵的数量随水体营养水平的增高而增加。营养水平最高的1站其休眠卵数量年平均为1.32个/cm3,营养水平较低的Ⅰ、Ⅱ站分别为0.74个/cm3、0.71个/cm3。休眠卵的数量在不同月份中有明显差别,4月、9月、1月数量较多,分别为1.35±0.58个/cm3、1.20±0.64个/cm3和1.12±0.62个/cm3。表层(0~5cm)沉积物中休眠卵的逐月变动明显,且变幅较大,而底层则呈不规则变动,变幅较小。根据轮虫休眠卵的分布与水体条件的关系,对不同水体沉积物中休眠卵的密度及水体沉积物中轮虫休眠卵的利用途径进行了讨论。 |
| 关键词: 东湖 轮虫休眠卵 数量 分布 |
| DOI：10.18307/1996.0107 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(39270098) |
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| Distribution of resting eggs of rotifers in deposits of Donghu Lake, Wuhan |
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Lin Li1, Zhou Jie1, Huang Xiangfei2
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1.Aquacultural College、 Huazhong Agricultural University, Wuhan 430070;2.Institute of Hydrobiology, Chinese Acedemy of Sciences, Wuhan 430072
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| Abstract: |
| The densities and distribution of resting eggs of rotifers in deposits were investigated at three areas of Donghu Lake in August 1992 to July 1993.The results show that the densities of resting eggs of rotifers decreased with the increase in depths of deposits from zero to 35cm.The pattern of vertical distribution of resting eggs was found to be rfV in shape.The abundance of resting eggs increased with the increase in water trophic level.The annual average of abundance (Aug., 1992~July, 1993) of resting eggs for the three regions were as follows: the hypertrophic region of Shuiguohu Lake (Station Ⅰ),1.32ind./cm3; the eu-trophic region of Guozhenghu Lake (Station Ⅱ),0.74ind./cm3; the eutrophic-mesotrophic region of Tanglinhu Lake (Station Ⅲ)%0.71ind./cm3.Monthly fluctuation of the abundance of resting eggs in found was found in Donghu Lake during August 1992~July 1993.The peaks were recorded in April(l.35±0.58incl./cm3), September(1.20±0-64 ind./cm3) and January (1.12±0-62ind./cm3).Monthly changes of densities at upper 0~5cm depths of deposits were obvious, and its ranges were great.The changes became irregular and the ranges became small with ihe increase in depths of deposits.Resting egg densities in different waters and rhe ways-concerning the use of resting eggs in deposits were discussed. |
| Key words: Donghu Lake rotifer resting eggs densities distribution |
