首页|期刊导航|中国地球化学学报(英文版)|Distribution of nutrients and chlorophyll a in the Three-Gorges Reservoir,China
中国地球化学学报(英文版)2006，Vol.25Issue(3)：295-300,6.
Distribution of nutrients and chlorophyll a in the Three-Gorges Reservoir,China
Distribution of nutrients and chlorophyll a in the Three-Gorges Reservoir,China
摘要
Abstract
The Three-Gorges Reservoir (TGR) is one of the largest water conservancy projects in the world. The status of nutrients and phytoplankton biomass has changed since the Three-Gorges Reservoir started water storage on June 1,2003. The distribution features of nutrients and chlorophyll a were deter mined by cruise monitoring during September 8 - 15, 2003. The results showed that the concentrations of dissolved total nitrogen (DTN) range from 1.01 to 1.35 mg · L-1, those of dissolved total phosphorus (DTP) from 0.028 to 0.054 mg · L-1. The concentrations of dissolved nitrogen and phosphorus exceed the eutrophication standards of OECD, and the ratio of DTN to DTP is over 16: 1. It is shown that phos phorus is an eutrophication-limiting element in the water body. The concentrations of potassium range from 2.80 to 3.44 mg · L-1; those of total organic carbon from 1.92 to 2.59 mg · L -1; those of chlorophyll a from 1.58 to 7.53 mg · m-3 with an average value of 4.69 mg · m-3 at surface layer. Atrophic gradient could be observed from the oligotropher to the mesotropher in the flow direction. Phytoplankton biomass in creased significantly in the reservoir area than before. A significant positive correlation (p ＜ 0.05, r = 0. 728 ) between chlorophyll a and NO3-N and a significant negative correlation (p ＜ 0. 01, r = -0.9207) between chlorophyll a and turbidity were also observed. Distribution features could be well divided into three clusters in terms of systematic cluster analyses, including the upper-stream area cluster, the middle stream area cluster and the down-stream area cluster.关键词
Three-Gorges Reservoir/nutrient/chlorophyll a/distributionKey words
Three-Gorges Reservoir/nutrient/chlorophyll a/distribution分类
天文与地球科学引用本文复制引用
LI Chongming,ZHANG Sheng,LIU Jinghong,WEI Shiqiang,ZHANG Yong,GAO Jixi..Distribution of nutrients and chlorophyll a in the Three-Gorges Reservoir,China[J].中国地球化学学报(英文版),2006,25(3):295-300,6.基金项目
This work was sponsored by Chongqing Municipality Natural Science Foundation (2004BB7075,2005BB7239 ) and China-Italy cooperated project (Survey and Assessment on Ecology in the Three-Gorges Area). （2004BB7075,2005BB7239 ）
