摘要
根据１９８７～１９８９年在鄱阳湖进行的６个采样站的调查资料，共获得２３种浮游桡足类，隶属３目６科１６属。新记录１０种。根据各种类出现的月份，把２３种桡足类分成终年出现型、夏秋季型、冬春季型和畏严冬型；并据出现的区域，归成沿岸型、敞水型和广布型。年数量变动曲线与生物量变动曲线有春、夏和秋季三次高峰。秋季高峰比春、夏季高峰更突出，持续时间约两个月，但生物量与数量三次高峰出现的时间并不完全一致。笔者还初步讨论了影响桡足类群落的生态因子。
This paper embodies the results of studies on the composition and seasonal abundance of planktonic copepods from October 1987 to March 1989 in Poyang Lake.Samples were collected monthly at six sampling stations.Twenty three species of planktonic copepods,belonging to 16 genera of 6 families,are reported. Of these,10 species are new records for the lake.According to their seasonal occurence, it is possible to divide them into four types:year around type,summer autumn type,winter spring type and evading severe winter type. According to their distribution,they fall into three types:along bank type,open water type ,and wide spread type.In the pattern of seasonal fluctuation,the peaks of abundance were usually recorded in spring,summer,and autumn,with the third peak far exceeding the formers and almost persisting for two months. The changes of copepod abundance were mainly determined by the populations of following dominant species: Sinocalanus dorrii,S.mystophorus, Mesocyclops leuckarti,Macrocyclops albidus,Cyclops vicinus,C.strenuus,Schmackeria inopinus and S.forbesi .There were three peaks of the biomass of copepods in a year.The peaks of biomass are not exactly parallel to the peaks of abundance because 80～95 percent individuals were larve at the time of maximum abundance.Ecological factors influencing such seasonal fluctuation of the copepods are then discussed briefly.
出处
《江西科学》
1998年第3期180-187,共8页
Jiangxi Science
基金
江西省山江湖开发办考察鄱阳湖项目
