基于24个采样点的大型底栖动物监测数据,Goodnight-Whitley修正指数(GBI指数)、average score per taxon(ASPT)指数、family biotic index(FBI)指数、Shannon-Wiener多样性指数和benthic index of biotic integrity(B-IBI)指数5种不同...基于24个采样点的大型底栖动物监测数据,Goodnight-Whitley修正指数(GBI指数)、average score per taxon(ASPT)指数、family biotic index(FBI)指数、Shannon-Wiener多样性指数和benthic index of biotic integrity(B-IBI)指数5种不同的生物评价指数,对东江流域的主要干支流进行河流生态健康评价,并研究不同生物评价指数在东江的适用性。结果表明,东江流域的整体健康状态处于中等水平,河流上游水质多达到"良好",中游水质多为"一般",下游水质则为"较差"或"极差"。分析了不同指数对不同类型人类干扰活动的响应,结果表明,除ASPT指数外,其余4种指数在不同程度上均能较显著地反映人类干扰的影响。其中,GBI指数对磷污染指示作用最佳;FBI指数对NO-2-N的污染指示最好;Shannon-Wiener多样性指数对有机污染有较好的指示作用,并与电导率呈显著的负相关关系;B-IBI指数与DO呈现显著的正相关,并能很好地指示NH+4-N污染。利用不同的生物评价指数对东江进行综合评价,不仅能较为可靠地反映东江流域水质的整体状况,而且能指示不同人类干扰活动对东江河流生态系统的影响。展开更多
对河流生态健康状况进行评价,可为河流治理和生态修复提供依据.基于2018年8—9月天津市河流现场调查获取的物理、化学和生物群落指标(浮游动物、浮游植物、底栖动物、鱼类、水生大型植物、陆生植物)数据,构建包含物理完整性、化学完整...对河流生态健康状况进行评价,可为河流治理和生态修复提供依据.基于2018年8—9月天津市河流现场调查获取的物理、化学和生物群落指标(浮游动物、浮游植物、底栖动物、鱼类、水生大型植物、陆生植物)数据,构建包含物理完整性、化学完整性和生物完整性在内的河流IEI(index of ecological integrity,生态完整性指数)评价体系,对天津市河流生态健康状况进行评价.根据生物栖息地评分和水质状况确定参照点位,采用标准化方法筛选候选指标,应用层次分析法计算三部分指标权重,最终得出天津市河流生态健康评价结果.结果表明:①IEI评价结果显示,天津市河流生态健康状况等级为“健康”的样点占18.8%,“较好”的样点占28.1%,“一般”的样点占40.6%,“较差”的样点占6.3%,“差”的样点占6.3%,天津市河流生态健康状况整体处于“一般”水平.②相关性分析表明,ρ(NH4^+-N)和ρ(COD Mn)超标是造成天津市水质达不到功能区标准的主要原因,同时也是影响河流生态健康的主要因素.研究显示,IEI评价法能够较为敏感地响应研究区面临的环境压力,适用于评价研究区河流生态健康.展开更多
Interconnected river system networks is a national water conservancy strategy in China and focus of research. Here we discuss the classification system, material and energy exchange between rivers and lakes, various d...Interconnected river system networks is a national water conservancy strategy in China and focus of research. Here we discuss the classification system, material and energy exchange between rivers and lakes, various dynamic flows and ecological functions of river-lake interconnected relationships. We then propose a novel method for the health assessment of river systems based on interconnected water system networks. In a healthy river system there is ＂material and energy exchange＂ and it is the first and foremost relationship of material and energy exchange between rivers and lakes. There are unobstructed various ＂flows＂ between rivers and lakes including material flows （water, dissolved substances, sediments, organisms and contaminants）, energy flows （water levels, flow and flow velocity）, information flows （information generated with water flows, organisms and human activities） and value flows （shipping, power generation, drinking and irrigation）. Under the influences of na- ture and human activity, various flows are connected by river-lake interconnection to carry material and energy exchange between rivers and lakes to achieve river-lake interactions. The material and energy exchange between rivers and lakes become one of the approaches and the direct driving forces of changes in river-lake interconnected relationships. The benignant changes in river-lake interconnected relationship tend to be in relatively steady state and in ideal dynamic balance.展开更多
文摘基于24个采样点的大型底栖动物监测数据,Goodnight-Whitley修正指数(GBI指数)、average score per taxon(ASPT)指数、family biotic index(FBI)指数、Shannon-Wiener多样性指数和benthic index of biotic integrity(B-IBI)指数5种不同的生物评价指数,对东江流域的主要干支流进行河流生态健康评价,并研究不同生物评价指数在东江的适用性。结果表明,东江流域的整体健康状态处于中等水平,河流上游水质多达到"良好",中游水质多为"一般",下游水质则为"较差"或"极差"。分析了不同指数对不同类型人类干扰活动的响应,结果表明,除ASPT指数外,其余4种指数在不同程度上均能较显著地反映人类干扰的影响。其中,GBI指数对磷污染指示作用最佳;FBI指数对NO-2-N的污染指示最好;Shannon-Wiener多样性指数对有机污染有较好的指示作用,并与电导率呈显著的负相关关系;B-IBI指数与DO呈现显著的正相关,并能很好地指示NH+4-N污染。利用不同的生物评价指数对东江进行综合评价,不仅能较为可靠地反映东江流域水质的整体状况,而且能指示不同人类干扰活动对东江河流生态系统的影响。
文摘对河流生态健康状况进行评价,可为河流治理和生态修复提供依据.基于2018年8—9月天津市河流现场调查获取的物理、化学和生物群落指标(浮游动物、浮游植物、底栖动物、鱼类、水生大型植物、陆生植物)数据,构建包含物理完整性、化学完整性和生物完整性在内的河流IEI(index of ecological integrity,生态完整性指数)评价体系,对天津市河流生态健康状况进行评价.根据生物栖息地评分和水质状况确定参照点位,采用标准化方法筛选候选指标,应用层次分析法计算三部分指标权重,最终得出天津市河流生态健康评价结果.结果表明:①IEI评价结果显示,天津市河流生态健康状况等级为“健康”的样点占18.8%,“较好”的样点占28.1%,“一般”的样点占40.6%,“较差”的样点占6.3%,“差”的样点占6.3%,天津市河流生态健康状况整体处于“一般”水平.②相关性分析表明,ρ(NH4^+-N)和ρ(COD Mn)超标是造成天津市水质达不到功能区标准的主要原因,同时也是影响河流生态健康的主要因素.研究显示,IEI评价法能够较为敏感地响应研究区面临的环境压力,适用于评价研究区河流生态健康.
基金National Natural Science Foundation of China(41361003)Science and Technology Project in Jiangxi Province Department of Education(GJJ14733)
文摘Interconnected river system networks is a national water conservancy strategy in China and focus of research. Here we discuss the classification system, material and energy exchange between rivers and lakes, various dynamic flows and ecological functions of river-lake interconnected relationships. We then propose a novel method for the health assessment of river systems based on interconnected water system networks. In a healthy river system there is ＂material and energy exchange＂ and it is the first and foremost relationship of material and energy exchange between rivers and lakes. There are unobstructed various ＂flows＂ between rivers and lakes including material flows （water, dissolved substances, sediments, organisms and contaminants）, energy flows （water levels, flow and flow velocity）, information flows （information generated with water flows, organisms and human activities） and value flows （shipping, power generation, drinking and irrigation）. Under the influences of na- ture and human activity, various flows are connected by river-lake interconnection to carry material and energy exchange between rivers and lakes to achieve river-lake interactions. The material and energy exchange between rivers and lakes become one of the approaches and the direct driving forces of changes in river-lake interconnected relationships. The benignant changes in river-lake interconnected relationship tend to be in relatively steady state and in ideal dynamic balance.
