摘要
利用2005-2009年每月一次的监测资料,对太湖竺山湾、梅梁湾和贡湖湾理化因子和浮游植物,特别是隐藻生物量周年季节变化进行比较研究,探讨环境因子以及蓝藻变化对隐藻生物量的影响.结果显示,竺山湾内隐藻平均生物量(1.89 mg/L)高于梅梁湾(0.87 mg/L)、贡湖湾(0.43 mg/L).2008 2009年隐藻平均生物量(2.12 mg/L)高于20052007年平均生物量(0.28 mg/L).通过与环境因子的时空差异比较分析,竺山湾内高营养盐浓度、高有机质浓度和高悬浮质浓度使得隐藻更具有竞争优势,而贡湖湾内浮游动物的摄食作用可能限制了隐藻生物量.同时,太湖隐藻与蓝藻的竞争演替趋势明显,春夏季高温和蓝藻的过度繁盛可能对隐藻的生长产生抑制作用.
The variation of the abundance of Cryptophytes was analyzed using monthly monitoring data during 2005 - 2009 in large shallow eutrophic Lake Taihu in China. The environmental factors and variations in eyanobaeterial biomass were analyzed to explain the spatial and temporal distribution of Cryptophytes at three stations in Lake Taihu （Zhushan Bay, Meiliang Bay and Gonghu Bay）. The results showed that： The mean biomass of the Cryptophytes in Zhushan Bay （ 1.89 mg/L） was much higher than that of Meiliang Bay （0.87 rag/L） and Gonghu Bay （0.43 mg/L） ; The average biomass of Cryptophytes in 2008 -2009 （2.12 mg/L） was much higher than that in 2005 -2007 （0.28 mg/L） ; Principally, Cryptophytes were most prevalent in Zhushan Bay which was marked by higher nutrient levels, higher organic matter and suspended solid concentrations. The succession of Cryptophytes was mainly affected by the grazing of zooplankton in Gonghu Bay. Furthermore, Cryptophytes and Cyanobacteria abundances were found to be inversely correlated, temporally, in Lake Taihu. Cyanobacteria seem able to reduce the biomass of Cryptophytes.
出处
《湖泊科学》
CAS
CSCD
北大核心
2012年第1期142-148,共7页
Journal of Lake Sciences
基金
国家重点基础研究发展计划"973"项目(2008CB418005)资助
关键词
隐藻
蓝藻
竺山湾
梅梁湾
贡湖湾
太湖
生物量
Cryptophytes
Cyanobacteria
Zhushan Bay
Meiliang Bay
Gonghu Bay
Lake Taihu
biomass
