| 应用底栖动物完整性指数评价太湖生态健康 |
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| 引用本文： | 蔡琨,张杰,徐兆安,吴东浩,张咏,王备新.应用底栖动物完整性指数评价太湖生态健康[J].湖泊科学,2014,26(1):74-82. |
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| 作者姓名： | 蔡琨 张杰 徐兆安 吴东浩 张咏 王备新 |
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| 作者单位： | 南京农业大学昆虫学系水生昆虫与溪流生态实验室;太湖流域水文水资源监测中心;江苏省环境监测中心; |
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| 基金项目： | 国家水体污染控制与治理科技重大专项项目(2012ZX07506-003)资助 |
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| 摘 要： | 依据2010年春季至2012年秋季,太湖32个样点的底栖动物和环境变量共11次的季节性调查结果,采用干扰程度最小系统法定义构建底栖动物生物完整性指数的参照系统,提出了确定参照系统的4个基本条件,进而按非湖心区和湖心区两个生态区分别构建太湖底栖动物完整性指数(LTB-IBI).通过对候选生物参数的分布范围筛选、判别能力分析、与理化因子的相关性和参数间的冗余分析,获得了非湖心区LTB-IBI的4个构成指数:总分类单元数、Simpson多样性指数、前3位优势单元%和BMWP指数,以及湖心区LTB-IBI的5个构成指数:总分类单元数、Simpson多样性指数、甲壳+软体分类单元数、前3位优势单元%和BMWP指数.采用比值法统一构成指数量纲,分别构建了非湖心区和湖心区LTBIBI指数,评价太湖水生态健康的等级.2010-2012年,太湖生态健康总体上呈现逐步提升的趋势.影响太湖底栖动物完整性的重要环境变量是水体中的氮含量.研究表明,连续观察数据可较大程度上提高太湖LTB-IBI指数的可靠性和评价结果的合理性.
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| 关 键 词： | 底栖动物 完整性指数 生态系统健康评价 太湖 |
| 收稿时间： | 2/7/2013 12:00:00 AM |
| 修稿时间： | 2013/4/10 0:00:00 |
Application of a benthic index of biotic integrity for the ecosystem health assessment of Lake Taihu |
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| CAI Kun,ZHANG Jie,XU Zhao''an,WU Donghao,ZHANG Yong and WANG Beixin.Application of a benthic index of biotic integrity for the ecosystem health assessment of Lake Taihu[J].Journal of Lake Science,2014,26(1):74-82. |
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| Authors: | CAI Kun ZHANG Jie XU Zhao'an WU Donghao ZHANG Yong and WANG Beixin |
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| Institution: | Laboratory of Aquatic Insects and Stream Ecology, Department of Entomology, Nanjing Agricultural University, Nanjing 210095, P. R. China,Laboratory of Aquatic Insects and Stream Ecology, Department of Entomology, Nanjing Agricultural University, Nanjing 210095, P. R. China,Monitoring Center of Hydrology and Water Resource, Lake Taihu Basin, Wuxi 214024, P. R. China,Monitoring Center of Hydrology and Water Resource, Lake Taihu Basin, Wuxi 214024, P. R. China,Jiangsu Environmental Monitoring Center, Nanjing 210036, P. R. China and Laboratory of Aquatic Insects and Stream Ecology, Department of Entomology, Nanjing Agricultural University, Nanjing 210095, P. R. China |
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| Abstract: | In order to develop a benthic index of biotic integrity for Lake Taihu (LTB-IBI), we seasonally carried out investigation on macroinvertebrate assemblages and their environments at 32 sites in Lake Taihu from spring, 2010 to autumn, 2012. Based on the investigation, we used the method of least disturbed condition and four criteria to define reference sites. LTB-IBI was developed separately for non-central region and central region of Lake Taihu. Metrics were stepwise examined for distribution analysis, discriminating power analysis, relationship with environmental variables and redundancy analysis. The core metrics of LTB-IBI for non-central region were total taxa richness, Simpson diversity index, 3 dominant taxon% and BMWP score. One more metric, i. e. (Crustacea + Mollusca) taxa for central region. LTB-IBI value for non-central region and central region were respectively obtained by summing up core metrics, which were transformed into a uniform score by ratio score method. Health condition of Lake Taihu was found to improve gradually from 2010 to 2012. Total nitrogen was suggested as the major factor affected LTB-IBI. Our results suggest that long-term data would benefit the development of a robust LTB-IBI and its use in practice of Lake Taihu health assessment. |
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| Keywords: | Benthic macroinvertebrate index of biotic integrity ecosystem health assessment Lake Taihu |
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