| 长江亚热带浅水湖群藻类浊度与非藻类浊度的变异规律 |
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| 引用本文： | 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. |
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| 作者姓名： | 王海军 王洪铸 潘保柱 梁小民 |
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| 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;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;长江科学院水力学研究所, 武汉 430010 |
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| 基金项目： | 国家自然科学基金(30900194)，国家重大基础研究发展计划(2008CB418006)，湖北省科技支撑项目(2015BBA225)，淡水生态与生物技术国家重点实验室(2014FB14和2011FBZ14)，中国科学院重大交叉项目(KZCX1-YW-14-1)，重大方向性项目(KZCX2-YW-426-02)，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)，973 Programs(2008CB418006)，Hubei Province(2015BBA225)，State Key Laboratory of Freshwater Ecology and Biotechnology(2014FB14 and 2011FBZ14)，Chinese Academy of Sciences(KZCX1-YW-14-1 and KZCX2-YW-426-02)，Youth Innovation Promotion Association of Chinese Academy of Sciences (2014312)] |
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| 摘 要： | 浊度的上升是湖泊富营养化过程中沉水植物消失、由草向藻发生稳态转换的根本原因。研究利用长江中下游浅水湖群区域数据对藻类浊度（TurbAlg）和非藻类浊度（TurbNonAlg）及其对总浊度（TurbTot）的贡献率（TurbAlg%，TurbNonAlg%）进行了推算。结果显示，在该区域非藻类浊度绝对值及其贡献率均普遍高于藻类浊度；TurbAlg主要受限于总磷（TP），而TurbNonAlg受水深（ZM）、TP和沉水植物等多重因素的影响。TurbAlg和TurbNonAlg呈现出随着TP浓度的升高而持续上升的趋势，表明尽管稳态转换存在特定的阈值，但整个富营养化过程中均需加强对营养物浓度的控制。
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| 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 |
| 收稿时间： | 2015-10-23 |
VARIATIONS OF ALGAL AND NON-ALGAL TURBIDITY AMONG THE YANGTZE SUBTROPICAL SHALLOW LAKES |
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| WANG Hai-Jun,WANG Hong-Zhu,PAN Bao-Zhu,LIANG Xiao-Min.VARIATIONS OF ALGAL AND NON-ALGAL TURBIDITY AMONG THE YANGTZE SUBTROPICAL SHALLOW LAKES[J].Acta Hydrobiologica Sinica,2017,41(2):414-419. |
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| Authors: | WANG Hai-Jun WANG Hong-Zhu PAN Bao-Zhu LIANG Xiao-Min |
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| 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. |
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| Keywords: | Regime shifts Algal turbidity Non-algal turbidity Lake morphology Eutrophication Yangtze shallow lakes |
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