底栖动物

Marine benthos are characterized by narrow activity and special territory distribution and can be used to indicate the quality of water and the polluted condition of sediments, which plays an important part in the biologic indication of marine pollution.

海洋底栖动物活动性小、地区性强，可以较好地反映水质和底质的污染状况，在海洋污染生物学指标中具有特别重要的意义。

During experiment, LC50 of bleaching powder in 24, 48, 72, 96, 120, 144 and 168 hours were get; LC50 of trichloroisocyanuric acid powder in 24, 48, 72 and 96 hours were also get.

试验以洱海流域的背角无齿蚌为研究对象，确定常用鱼药：漂白粉、氯杀宁对湖泊大型底栖动物背角无齿蚌的毒性影响。

Corbicula fluminea, a bivalve commonly distributing in the tidal flats of the Yangtze River estuary, was selected for this study, which aimed to analyze accumulation characteristics of Zn,Cu,Pb,Cd and Cr in C. fluminea and to evaluate current situation of its biological quality.

以长江河口湿地生态系统一种习见的大型底栖动物河蚬Corbicula fluminea为研究对象，分析和评价了河蚬对Zn、Cu、Pb、Cd和Cr的积累特性以及长江口区河蚬的生物质量现状。

Dominant species were comprised of mainly micro- and meso-zooplankton species and planktonic larvae of benthos such as Parvocalanus crassirostris, Cirripedia nauplius, Oithona attenuata, Acrocalanus gibber, Nauplius, Bivalvia veliger, Copepodite, Oithona simplex and so on.

优势种主要是中小型种类和底栖动物的幼虫，如强额孔雀哲水蚤、蔓足类无节幼虫、细长腹剑水蚤、驼背隆哲水蚤、无节幼虫、双壳类面盘幼虫、桡足幼体、简长腹剑水蚤等。

It is suggested that dredging in headwaters of Suzhou creek help for the recovery of the community of micro-invertebrate.

说明苏州河上游底泥疏浚有利于大型底栖动物群落结构的恢复。

In this paper, 13 lakes and 2 large-scale reservoirs in Wuhan were investigated, the makeup of species , dominance species and standing biomass of plankton, benthon, hydrophyte, fish and et al were carried out. And the bio-indicate method , diversity index are used to evaluate the water body.

本文对武汉市13个湖泊及2个大型水库浮游生物、底栖动物、大型水生植物、鱼类及其它生物的种类组成、优势种的鉴定及现存量的测定结果进行了分析，运用指示生物法、种多样性指数法对所调查水体进行了水质评价。

Meanwhile, ATP content of the phytal meiofauna from the rocky intertidal zone in Qingdao was studied.

同时还对青岛岩礁附植小型底栖动物的ATP含量进行了研究。

Totally 345 giant isopod Bathynomus doederleini Ortman 1894 were caught.

巨型等脚类 Bathynomus属是一群用笼具常捕获的底栖动物。

There was a peak value during spring and summer in mean density and biomass of macrozoobenthos.

底栖动物密度和生物量在春夏之交有一高峰。

The result was that Mollusca and Oligochaeta were dominant in the both sites.Before dredging, there were six species of Mollusca,tree species of Oligochaeta and one of Hirudinea in Huangdu, and one Mollusca and four Oligochaetas in Huacao.

结果显示，黄渡和华漕两个断面的大型底栖动物均以软体动物和寡毛类为主，疏浚前黄渡软体动物为6种，寡毛类为3种。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。