首页|期刊导航|中国农业科学(英文版)|Study on the Possible Cause of Water Blooming and the Bloom-Prevention Technology in Lake Qiandaohu
中国农业科学(英文版)2004，Vol.3Issue(8)：627-633,7.
Study on the Possible Cause of Water Blooming and the Bloom-Prevention Technology in Lake Qiandaohu
Study on the Possible Cause of Water Blooming and the Bloom-Prevention Technology in Lake Qiandaohu
摘要
Abstract
A hypothesis was formulated to explain the possible cause of water bloom occurring inLake Qiandaohu in 1998 and 1999. We tested this hypothesis with a 3-year in situ fieldstudy. The results showed that the reconstruction of the silver carp and bighead carppopulations, without other measures of nutrient control, could prevent the recurrence ofalgal bloom in the lake successfully. This result could serve as an evidence to thesuggested hypothesis for water blooming: The drastic decline of the filter feedingsilver carp and bighead carp in the lake, rather than the nutrients overloading, wasmainly responsible for the algal bloom. According to this study, we suggest a generalhypothesis to the ecological mechanism of algal blooming: The insufficient grazing fromthe phytoplanktivores (top-down control) to the algal reproduction from nutrientsavailable (bottom-up effect) is the radical cause of water blooming, while conventionally,it is primarily attributed to the enrichment of nutrients. Besides, this study showedthat stocking silver carp and bighead carp in lakes could improve water quality, whichis also contrary to the conventional opinion. Finally, this study provided a cost-effective and practicable approach to control water bloom for the large-sized reservoirs,especially when water blooming occurred locally. A net-enclosed aquaculture zone (NEAZ)can be established in the nutrients-exposure area of the waters and stocked with the twocarps, water bloom could be controlled and prevented.关键词
Lake Qiandaohu/Silver carp and bighead carp/Cause of water bloom/Net-enclosed aquaculture zone (NEAZ)Key words
Lake Qiandaohu/Silver carp and bighead carp/Cause of water bloom/Net-enclosed aquaculture zone (NEAZ)引用本文复制引用
LIU Qi-gen,CHEN Ma-kang,TONG He-yi,HE Guang-xi,HONG Rong-hua,CHEN Lai-sheng,CHEN Li-qiao..Study on the Possible Cause of Water Blooming and the Bloom-Prevention Technology in Lake Qiandaohu[J].中国农业科学(英文版),2004,3(8):627-633,7.基金项目
This research was supported by the National Natural Science Foundation of China (30028018). （30028018）
