水生生物学报2017，Vol.41Issue(2)：414-419,6.DOI:10.7541/2017.51
长江亚热带浅水湖群藻类浊度与非藻类浊度的变异规律
VARIATIONS OF ALGAL AND NON-ALGAL TURBIDITY AMONG THE YANGTZE SUBTROPICAL SHALLOW LAKES
摘要
Abstract
Increasing turbidity is the main cause for the disappearance of submersed macrophytes and regime shift from clear-water to turbid-water states along the eutrophication of lakes. Quantitative discrimination on the contribution of algal and non-algal particles to total turbidity (TurbTot) may enhance the understanding on these processes. This study investigated algal turbidity (TurbAlg), non-algal turbidity (TurbNonAlg), and their contribution to TurbTot in percentage (TurbAlg%, TurbNonAlg%) using data from Yangtze shallow lakes. The results showed that both absolute and percentage non-algal turbidity (averaged 0.96/m and 71.0%) were much higher than those of algal turbidity (averaged 0.19/m and 11.0%). Total phosphorus (TP) positively impact TurbAlg and TurbNonAlg, and when TP exceeded 100 μg/L, TurbAlg and TurbAlg% showed accelerated increases while TurbNonAlg% showed a decreasing trend. TurbAlg, TurbAlg% and TurbNonAlg were significantly lower in macrophyte-present lakes than in macrophyte-absent lakes, while TurbNonAlg% was not sig-nificantly different between lakes. TurbNonAlg and TurbNonAlg% increased significantly with decreased biomass of sub-mersed macrophytes (BMac), while TurbAlg and TurbAlg% showed no significant varying trend. In summary, TurbAlg was determined mainly by TP, while TurbNonAlg was greatly determined by ZM, TP, and submersed macrophytes. The fact of continuously increasing TurbAlg and TurbNonAlg along with increasing TP and degrading macrophytes demonstrates that nutrient control and macrophyte maintenance are practically important during the whole process of eutrophication, al-though there exists a threshold for clear-to-turbid regime shifts.关键词
稳态转换/藻类浊度/非藻类浊度/湖盆形态/富营养化/长江浅水湖群Key words
Regime shifts/Algal turbidity/Non-algal turbidity/Lake morphology/Eutrophication/Yangtze shallow lakes分类
生物科学引用本文复制引用
王海军,王洪铸,潘保柱,梁小民..长江亚热带浅水湖群藻类浊度与非藻类浊度的变异规律[J].水生生物学报,2017,41(2):414-419,6.基金项目
国家自然科学基金(30900194) （30900194）
国家重大基础研究发展计划(2008CB418006) （2008CB418006）
湖北省科技支撑项目 (2015BBA225) （2015BBA225）
淡水生态与生物技术国家重点实验室(2014FB14和2011FBZ14) （2014FB14和2011FBZ14）
中国科学院重大交叉项目(KZCX1-YW-14-1)和重大方向性项目(KZCX2-YW-426-02) （KZCX1-YW-14-1）
中国科学院青年创新促进会基金(2014312) 资助 [Supported by the National Natural Science Foundation of China (30900194) （2014312）
973 Programs (2008CB418006) （2008CB418006）
Hubei Province (2015BBA225) （2015BBA225）
State Key Laboratory of Freshwater Ecology and Biotechnology (2014FB14 and 2011FBZ14) （2014FB14 and 2011FBZ14）
Chinese Academy of Sciences (KZCX1-YW-14-1 and KZCX2-YW-426-02) （KZCX1-YW-14-1 and KZCX2-YW-426-02）
Youth Innovation Promotion Association of Chinese Academy of Sciences (2014312)] （2014312）
