| 基于浮游细菌生物完整性指数的河流生态系统健康评价——以滇池流域为例 |
| 摘要点击 3186 全文点击 1676 投稿时间：2012-11-11 修订日期：2013-01-10 |
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| 中文关键词 浮游细菌 完整性指数 河流生态系统 BP-IBI 健康评价 滇池流域 |
| 英文关键词 bacterioplankton index of biotic integrity (IBI) river ecosystem BP-IBI ecological health assessment Dianchi Watershed |
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| 中文摘要 |
| 生物完整性指数(IBI)已被广泛运用于河流生态系统的健康评价中. 然而,现存的IBI缺少基于分解者的评价方法. 因此,基于浮游细菌的T-RFLP结果,通过对关键环境因子与候选生物参数的筛选和确定,建立浮游细菌生物完整性指数(BP-IBI)评价体系,对滇池流域入湖河流生态系统健康状况进行评价. 评价结果表明,作为参照点的11个滇池流域入湖河流水源地或上游出水口样点健康状况为Ⅰ级健康(8个)或Ⅱ级亚健康(3个),27个下游入湖口样点健康状况分别为Ⅰ级健康(4个)、Ⅱ级亚健康(14个)、Ⅲ级一般(7个)和Ⅳ级较差(2个),无V级极差点. 对BP-IBI的可行性验证结果表明,与底栖IBI、着生藻IBI和综合污染指数相比,BP-IBI结果能够更好地反映各主要环境因子、不同土地利用方式以及上游的来水方式对生态系统的影响,对退化生态系统的健康状况具有良好的表征作用. 因此,BP-IBI是评价受损河流生态系统健康的一种良好方法. |
| 英文摘要 |
| The index of biotic integrity (IBI) has been widely applied to the health assessment of river ecosystems. However, the currently available IBI methods are lack of decomposer-based assessment. Based on the T-RFLP result of bacterioplankton, we developed the bacterioplankton index of biotic integrity (BP-IBI) after the screening of major environmental factors and candidate metrics to assess the health of the inflow rivers in Dianchi Watershed. The evaluation result indicated that the eco-health conditions of 11 reference sites were either level Ⅰ (8 sites) or level Ⅱ (3 sites), while the 27 damaged sites were level Ⅰ (4 sites), level Ⅱ(14 sites), level Ⅲ(7 sites), and level Ⅳ(2 sites), and there was no level V site. Compared with the other IBI methods and the integrated pollution index, BP-IBI showed better effect in reflecting the influence of the key environmental factors, the land use types and the upstream water types in river ecosystems. Therefore, BP-IBI is a good method to characterize the health status of river ecosystems. |
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