广东省水库枝角类组成特征的初步研究

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全文下载陈绵润,赵帅营,林秋奇,韩博平 （暨南大学水生生物研究所，广州 510632） 摘 要：于2000年丰水期和枯水期调查了广东省19座典型大中型水库枝角类，随后对其中3座代表性水库进行了4年的枝角类种类定性调查.在鉴定出的枝角类16属24种中有13个广温种、7个嗜暖种、3个嗜寒种和1个特有种；每个水库的平均种类数5-6种.从个体大小来看，水库枝角类以小个体种类为主，有14种的体长小于1mm，它们分布广且数量多，其中优势种主要为长额象鼻溞、秀体溞、微型裸腹溞、颈沟基合溞和角突网纹溞等.透明溞和透明薄皮溞是主要的大个体种类，出现在4座贫、中营养水库的水样中.水库枝角类的丰度较低，在丰水期，平均丰度小于10ind./L和10-20ind./L的水库分别为14座和5座，在枯水期，为12座和5座，而高州水库和河溪水库中的平均丰度达67ind./L.主要优势种在不同营养类型水库中分布差别不大.枝角类的丰度受水力滞留时间影响，直流型水库的枝角类种群丰度的分布明显受到水流速度的影响，湖泊区枝角类个体及其食物均随水库放水输出而减少.由于采样点主要位于大坝附近，枝角类以敞水区的种类为主.从种类组成和数量来看，广东省水库枝角类具有明显的热带特点，枝角类的生物量小，以个体较小的种类优势种，大型种类的个体数量极低且身体透明. 关键词：枝角类；热带亚热带；水库；分布 参考文献 [1]Korponai J, Paulovits G & Matyas K et al. Long?term changes of cladoceran community in a shallow hypertrophic reservoir in Hungary. Hydrobiologia, 2003, 504:193-201. [2]Horn W. Long?term development of the crustacean plankton in the Saidenbach Reservoir (Germany)?changes, causes, consequences. Hydrobiologia, 2003, 504:185-192. [3]Vijverberg J & Boersma M. 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ymwatcher

很有价值的帖子，收藏了，期待楼主更多的好资料。。。