The main forms of life in the limnetic zone are phytoplankton and zooplankton.

此區(qū)主要由浮游植物和浮游動物組成。

During the process of Yangtz River diluted water extending to northeast, the photosynthesis of phytoplankton was enhanced because of the suspended sediment settling, water temperature stratifying, and the luminousness increasing.

長江口及東海調(diào)查海域欧美久久a网站，考慮不同水系的影響看黄的地址，在高混濁度水體、S30的調(diào)查海域分別建立了表層海水pCO_2受溫度麻豆精品三级视频在线播放、鹽度午夜电影网理论片、磷酸鹽三因素影響的模型www.ldytv.com。

Relationships among fish,zoo-plankton,phytoplankton,submerged macr ophyte,and bacteria in eutrop hic aquatic ecosystem were analyzed.

實踐表明，無論是外源營養(yǎng)負(fù)荷的削減91日韩无码视频，還是各種除藻措施的實行18禁免费观看，均不能在大型水域取得良好而持久的效果。

The contemporary radiations of phytoplankton and benthic metaphyte probably made a significant contribution to the Early Cambrian explosion of animals.

這一時期浮游微生物和后生植物的共同繁盛可能為早寒武世"澄江生物群"的爆發(fā)奠定了生態(tài)基礎(chǔ)国产一级a爱看片免费。

Three principles, i.e., minimus, integrated and standard rules, are proposed for studies of the strategy of marine phytoplankton sampling and analysis in China's coastal waters.

中文摘要：從理論上對于海洋浮游植物在生態(tài)系統(tǒng)動力學(xué)中的監(jiān)測與調(diào)查方法進行初步探討国产黄毛片在线看。

The feeding and excretion of three little fishes (Hemiculter. leucisculus, Tilapia. aurea and Cirrhinus. molitorelld) was studied and their effect on water quality of Qiankeng reservoir in Shenzhen City Around the topdown effect of fish was also studied. Based on the analysis of their stomach contents, their diet composition was assayed. The three fishes" feeding rhythm in cage and their rate of digestion indoor were looked into, and their daily ration was estimated through the method of daily average fullness index. Using the spectrophotometer, the content of chlorophyll a in the stomach was measured, and the feasibility of taking the chlorophyll a as an index of measuring the feeding of fish on phytoplankton was studied. Adopting the national standard method, the effect of the three fishes" excretion on total nitrogen, total phosphorus, CODMn, pH, turbidity and conductivity coefficient was surveyed. The effect of feeding and excretion offish on water quality was discussed and the results revealed as follows:H.

圍繞魚類的下行效應(yīng)，本文以深圳茜坑水庫三種小型魚類Hemiculter leucisculus羅非魚Tilapia.aurea和鯪魚Cirrhmus.molitorella為研究對象又色又爽又黄的视频大全欧美，以胃含物分析為基礎(chǔ)美女一级，分析了三種魚類的食物組成；調(diào)查了網(wǎng)箱中自然狀態(tài)下三種魚的攝食節(jié)律一级无码免费毛片，在室內(nèi)調(diào)查了三種魚的食物消化速率色网站免，運用日平均飽滿指數(shù)法計算出三種魚的日糧；采用分光光度法測定了魚體腸葉綠素含量青草h在线视频播放，探討了葉綠素作為魚類對浮游植物攝食量衡量指標(biāo)的可行性亚洲性爱视频偷拍；采用國家標(biāo)準(zhǔn)的水質(zhì)測量方法，測定了魚類排泄對總氮女人18毛片免费看、總磷久久久999视频、高錳酸鹽指數(shù)、pH黄色按摩毛片、濁度和電導(dǎo)率的影響量。

The results suggest that omnivorous tilapia can promote periphyton shifting to phytoplankton.

研究結(jié)果顯示九九视频欧美A片，雜食性的羅非魚可以促進系統(tǒng)的附著藻類向浮游植物轉(zhuǎn)化操大黑屄。

To May 2004. According to the surveys, 160 taxa of phytoplankton belonging to 68 genera of 8 phyla have been identified, of which the most abundant are of Chlorophyta, with 99 species of 36 genera, taking up 61.88% of the total.

lm，是一個平原淺水湖泊色一色干一干，它不但是上海最大的旅游勝地射射网址，也是上海市主要的供水水源之一i'，涩涩免费视频在线观看高清频道，〕女同一区二区毛片，對淀山湖的水質(zhì)調(diào)查和水環(huán)境保護有著重要的意義。

SPSS was used for principal component analysis and factor analysis of quantity and biomass of six phyla of phytoplankton and four species of zooplankton of five lakes.

利用SPSS軟件好爽!插进去，對5個湖泊浮游植物6個門和浮游動物4個類的數(shù)量和生物量進行了主成分分析和因子分析国产www黄。

In other words, phytoplankton respond very rapidly to changes in their environment.

換句話說，浮游植物對環(huán)境變化的反應(yīng)是及其敏感的色本色网无码在线。