FACTORS INFLUENCING CHLOROPHYLL A CONCENTRATION IN THE YANGTZE-CONNECTED LAKES
FACTORS INFLUENCING CHLOROPHYLL A CONCENTRATION IN THE YANGTZE-CONNECTED LAKES
复制标题
DOI：
--
复制
发表时间：
2009
影响因子：
--
通讯作者：
Baozhu Pan;Haijun Wang;Xiao-min Liang;Hongzhu Wang
中科院分区：
文献类型：
--
作者：
Baozhu Pan;Haijun Wang;Xiao-min Liang;Hongzhu Wang
为确定影响浮游植物叶绿素a(Ch1a)的环境因子，于2004年在长江滩涂与河流相连的3个湖泊(洞庭湖、鄱阳湖和石旧湖)进行了4次野外调查。结果表明，这些湖泊的CHIa平均浓度在2.98~3.65 mg m(-3)之间。影响淡水区和赤道区Chla的主要因子分别是总磷(TP)和水流速度(U)。建立了总氮(log(10)TN)和水深(log(10)Z)的多元关系。进一步分析发现，河流连通湖泊的绝对CHa和log(10)Chla=f(log(10)Tp)的斜率明显低于河流孤立湖泊。这表明，河湖连通性可以显著改变TP与叶绿素a浓度之间的关系。
To determine the environmental factors influencing C, phytoplankton chlorophyll a (Ch1 a), field investigations 4 were conducted in three river-connected lakes (Dongting Lake, Poyang Lake and Shijiu Lake) of the Yangtze floodplain in 2004. Results showed that the average Chi a concentration in these lakes ranged from 2.98 to 3.65 mg m(-3). The major factors influencing Chl a in lentic and lotic regions were total phosphorus (TP) and water velocity (U), respectively. Multiple relationships including total nitrogen (log(10)TN) and water depth (log(10)Z) were established. Further analyses found that the absolute Chi a and slope of log(10)Chl a=f (log(10)TP) in the river-connected lakes were obviously lower than those in the river-isolated lakes. This suggests the river-lake connectivity can significantly modify relationship between TP and chlorophyll a concentration.