biotic index

Sludge biotic index ( SBI), based on the microfauna associated with activated sludge mixed liquor, has been devised to monitor activated sludge plant performance.

污泥生物指数（SBI）由对活性污泥混合液中微型动物群落结构的分析得出，用于评价活性污泥的运转效能。

Water quality of 9 sites were evaluated by the biotic index at the Family-level of the insects and general chemical menitoring method.

利用科级生物指数及常规化学监测方法对9个基点的水质进行了评估；

The Application of the Biotic Index of Protozoa in Inland Rivers Water Quality Assessment in Fuzhou

原生动物生物指数在福州市内河水质评价中的运用

The seasonal ecological features of phytoplankton community including its species composition, population size, dominant species, saprobic indicator, diversity index and diatom biotic index were preliminarily studied at 22 sampling stations in the Chaohu Lake, Anhui Province.

对巢湖浮游植物在22个样点，四季采样，进行了种类组成、种群数量、优势种、污染指示种，多样性指数及硅藻指数等群落生态学的初步研究。

Evaluating the performance of activated sludge by sludge biotic index

用污泥生物指数评价活性污泥的运转效能

The data which have been collected for the last three years are used for biological evaluation of the river itself, and to calculate Trent biotic index, Chandler score system and Shannon diversity index.

根据三年来所收集到的资料，计算了Trent生物指数，Chandler记分制以及Shannon多样性指数，并对图们江的污染状况作出生物学评价，上游地段属于清洁水到中污染；

The increase in species, variation in community structure and obvious recovery in relative biomass index and relative biotic density index of necton indicated that ecological environment of Yun-dang lake had been improved greatly by further comprehensive control and management since 1993.

游泳生物种类的增加和群落结构的变化以及相对生物量指数和相对生物密度指数的明显恢复，表明筼筜湖经过1993年以来的进一步综合治理，生态环境的改善是显著的。