biotic index meaning in English
生物指数法
Examples
- Two methods were used to provide water quality ratings in bio - assessment using biotic index ( bi ) , ( 1 ) using the sampled sites meet the criteria for undisturbed and minimally impaired conditions , the confidence in the distribution of bi value for the 75th percentile to be used as the criterion dividing " unimpaired " form " impaired " . any values below the 75th percentile were considered as " excellent " , and values above the 75th percentile , was quadrisected for different water quality ratings
采用两种方法研究m指数划分水质级别的标准： （ 1 ）无污染样点的m指数值法，以75分位数值作为最清洁水质标准，将高于此值的可能分布范围一等分，分别代表不同的水质级别zk ）所有样点（污染与无污染样点）的bi指数值法，以5分位数值作为最清洁水质的标准，将高于此值的可能分布范围4等分，分别代表不同的水质级别。 - This thesis dealt with the tolerance value of benthic macro - invertebrate taxa , bio - assessment criteria in water quality using biotic index in china , and the establishment of benthic index of biotic integrity ( b - ibi ) in the health assessment of stream ecosystem . a comparison of the number of species , individuals and values of metrics between quantitative and semi - quantitative sampling methods were also studied
并对溪流定量采样法(索伯网样)和半定量采样法(踢网样加d形抄网样)进行了比较研究一、溪流底栖动物定量和半定量采样法比较研究溪流底栖动物定量采样多用于溪流生态学研究，半定量采样法主要用于溪流水质生物评价研究。