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三峡水库香溪河库湾夏季藻类水华的时空动态及其影响因素
引用本文:王岚,蔡庆华,张敏,谭路,徐耀阳,孔令惠.三峡水库香溪河库湾夏季藻类水华的时空动态及其影响因素[J].应用生态学报,2009,20(8):1940-1946.
作者姓名:王岚  蔡庆华  张敏  谭路  徐耀阳  孔令惠
作者单位:1. 中国科学院水生生物研究所淡水生态与生物技术国家重点实验室,武汉,430072;中国科学院研究生院,北京,100049
2. 中国科学院水生生物研究所淡水生态与生物技术国家重点实验室,武汉,430072
基金项目:国家自然科学基金,中国科学院知识创新工程重要方向项目,国家重点实验室专项经费项目
摘    要:2008年6—8月,三峡水库香溪河库湾相继暴发蓝藻和绿藻水华.依据香溪河库湾夏季的每周监测,对研究区2次水华分别进行聚类和判别分析,研究了2次水华的时空动态及其影响因素.结果表明:研究区2次水华过程均可划分为无水华组、过渡组和水华组;2次水华的暴发对可溶性硅(DSi)、硝态氮与亚硝态氮(NO3--N+NO2--N)和磷酸盐(PO43--P)3种营养盐的吸收程度不同;蓝藻水华暴发期间的DSi、总氮/总磷(TN/TP)、DSi/TN和DSi/TP值均低于绿藻水华;判别蓝藻水华暴发的参数为叶绿素a(Chl a)、TN和PO43--P,而Chl a和DSi则是绿藻水华暴发的判别因子,将2次水华过程划分为水华组和无水华组的判别效果更好;判断蓝藻和绿藻水华暴发的叶绿素a临界浓度分别为40和20 μg·L-1.

关 键 词:蓝藻水华  绿藻水华  聚类分析  判别分析  三峡水库  香溪河库湾
收稿时间:2009-02-10

Spatiotemporal dynamics and related affecting factors of summer algal blooms in Xiangxi Bay of Three Gorges Reservoir
WANG Lan,CAI Qing-hua,ZHANG Min,TAN Lu,XU Yao-yang,KONG Ling-hui.Spatiotemporal dynamics and related affecting factors of summer algal blooms in Xiangxi Bay of Three Gorges Reservoir[J].Chinese Journal of Applied Ecology,2009,20(8):1940-1946.
Authors:WANG Lan  CAI Qing-hua  ZHANG Min  TAN Lu  XU Yao-yang  KONG Ling-hui
Institution:State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China;Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:In June-August 2008, the cyanobacterial bloom and chlorophycean bloom broke out
 one after the other in the Xiangxi Bay of Three Gorges Reservoir. Based on the
weekly monitoring in summer in the Bay, and by using cluster analysis a
nd discriminant analysis, the spatiotemporal dynamics and related affecting fact
ors of the two blooms were studied. Each of the blooms could be divided into non
-bloom group, transitional group, and bloom group. The two blooms had different
uptake levels of dissolved Si (DSi), NO3--N+NO2--N, and PO43-
-P. Cyanobacterial bloom had lower DSi concentration and lower TN/TP, DSi/TN an
d DSi/TP ratios than chlorophycean bloom. The discriminant factors of cyanobacte
rial bloom were Chl a, TN and PO43--P, while those of chlorophycean blo
om were Chl a and DSi. Better discriminant results were obtained when dividing e
ach bloom into non-bloom group and bloom group. The critical value of Chl a for
 cyanobacterial bloom and chlorophycean bloom was 40 and 20 μg·
L-1, respectively.
Keywords:cyanobacterial bloom  chlorophycean bloom  cluster analysis  discriminant analysis  Three Gorges Reservoir  Xiangxi Bay
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