The main results are given as follows: Up to now,West Lake is eutrophic based on physical and chemical factors and zoobenthos after ecological treatment engineering; The ecological engeering has a little effect on zoobenthos community strcture, and most of zoobenthos belong to eutrophic species and mollusca species was absent,surprisedly, two exotic species Nephthys oligobranchia and Limnoperna sp.

研究中主要的成果為：不論是理化指標(biāo)還是底棲動(dòng)物指標(biāo)顯示亚洲最大在线观看黄网站，實(shí)施生態(tài)治理工程后西湖仍屬于富營養(yǎng)化湖泊看黄片在线天堂在线，西湖屬于V類甚至劣V類水體www、AⅤ毛片COm。

Based the structure and function of Yangtze River Estuary Ecosystem, the energy expenditure of shorebird community staging at Yangtze River Estuary and the production of macro zoobenthos community were studied in this dissertation.

本文以長江河口濕地生態(tài)系統(tǒng)的結(jié)構(gòu)和功能為基礎(chǔ)亚洲先锋色资源在线观看，對(duì)鸻鷸群落在長江口地區(qū)中途停歇期間的能量需求和棲息地選擇和利用進(jìn)行了研究，探討了底棲動(dòng)物作為鸻鷸群落餌料的狀況黄片视频免费看，并根據(jù)鸻鷸群落和底棲動(dòng)物群落能量流動(dòng)特點(diǎn)丁香五月婷婷激情四射，構(gòu)建了Stella計(jì)算模型，對(duì)鸻鷸群落中途停歇長江口期間所需要的棲息地面積進(jìn)行了估算和探討青草国产在线，以期為區(qū)域發(fā)展和鸻鷸棲息地保護(hù)提供依據(jù)欧美在线免费不卡视频。

In this paper, the species, amounts and distribution situation of phytoplankton, zooplankton and zoobenthos in Shenzhen Bay are studied.

對(duì)深圳灣浮游植物欧美最猛性XXXXX潮喷视频、浮游動(dòng)物和底棲動(dòng)物的種類、數(shù)量及分布現(xiàn)狀進(jìn)行了研究AV免费高清不卡在线看。

Major contents of this paper were: the community structure of zoobenthos, species diversity and production of zoobenthos and so on.

主要結(jié)果如下： 1JIZZJIZZ18XXXX、軍山湖計(jì)有底棲動(dòng)物37種，其中瓣鰓綱3科10種国产一级精品婬片；腹足綱7科11種日a在线网址；多毛綱1種；寡毛綱6種曰韩精品欧美精品；水生昆蟲7種欧美性愤潮XXXX；其他2種。

Zoobenthos are also used as biological monitors of the environmental health of lakes and rivers. Theories and methods of the secondary production of zoobenthos were reviewed with emphasis on the calculation of secondary production, P/B coefficient and factors to affect secondary production. In addition, this paper also ...

本文綜述了國外在底棲動(dòng)物次級(jí)生產(chǎn)力研究中的理論和方法射视频网，重點(diǎn)闡述了底棲動(dòng)物次級(jí)生產(chǎn)力的計(jì)算方法在线观看精品黄片、P/B系數(shù)、生產(chǎn)量以及影響次級(jí)生產(chǎn)力的因素人人射人人操人人爽，并總結(jié)了目前該領(lǐng)域的一些新進(jìn)展在线你懂视频，以期為國內(nèi)相關(guān)研究提供參考和借鑒。

The studies of relationship between zoobenthos and environmental factors were conducted in this paper,and how to protect and utilize zoobenthos has been suggested. zoobenthos ; environment factors ; effect ; protect and utilize

底棲動(dòng)物的生長繁殖视频一区视频二区国产激情、種類組成和現(xiàn)存量在不同水體和區(qū)域間存在著明顯的差異黄网站在线永久免费播放，環(huán)境因子對(duì)底棲動(dòng)物的影響相當(dāng)復(fù)雜，不僅因子眾多无码激情免费视在线观看，而且各個(gè)因子對(duì)底棲動(dòng)物中不同類群的作用并不完全一致，因此對(duì)這方面進(jìn)行研究具有重要的意義毛片网址站，以下從理化因子和生物因子對(duì)底棲動(dòng)物影響來加以概述www干干干操操操。1理化因子對(duì)底棲動(dòng)物的影響1.1水質(zhì)對(duì)

In order to study the impact of rice-duck farming ecosystem on zoobenthos biodiversity in paddy waters, surface soil samples taken from rice-duck farming ecosystem and conventional paddy fields were analyzed for zoobenthos biodiversity.

在水稻不同生育時(shí)期對(duì)稻鴨共作稻田和常規(guī)稻田的土壤取樣，研究不同稻田生態(tài)系統(tǒng)水體底棲動(dòng)物的生物多樣性免费一级AV浏览器在线观看。

Through field observations and sampling, by referencing to other documents and information, with correlation analysis and principal component analysis as mathematical tools, we know that: the distribution of the number of birds has close relations with density of zoobenthos and ratio of water area, the correlation coefficient of the distribution and the two factors are 0.916 and 0.745, the density of zoobenthos is the most direct reflection; Vegetation types , the coverage and water level may have relations with the distribution of the kind of birds, normally, middle and large volume birds need high vegetation and high coverage as their habitats, and waterfowl like deep water as their habitats; Human activities have low impact on the the distribution of the number of birds, but the activities have relations with all the other environmental factors.

通過實(shí)地的觀測成本人H片动漫网站在线看3D、采樣，并結(jié)合其他文獻(xiàn)的資料欧美一级AA大片片免费看视频，以相關(guān)分析和主成分分析作為數(shù)學(xué)工具插入女人下面视频，得知：鳥類的數(shù)量分布和底棲生物密度、水域面積比例有著密切關(guān)系中文字幕乱码亚洲无线码三区，鳥類數(shù)量分布與兩者的相關(guān)系數(shù)分別為0.916和0.745九一精品视频在线免费，其中，底棲生物密度是鳥類數(shù)量分布的最直接反映草逼性爱视频日本女优；植被類型一级黄片拍拍,免费视频、植被蓋度和水位可能與鳥類的種類分布有一定關(guān)系，通常體積中91免看、大型的鳥類需要較高的植被高度性深夜免费福利视频，來作為自己的棲息場所56色播影院色播性播影院，水禽需要水位較深的區(qū)域作為自己的棲息場所；人為活動(dòng)對(duì)鳥類數(shù)量分布的影響不大国产又刺激又黄又爽又湿，但對(duì)所有自然環(huán)境因子都有一定影響欧美一级做一级a做片性视。

A where enhanced some what through putting in two kinds of zoobenthos as Bellamya purificata and Misgurnus anguillicaudatus in plant cultivated channels of water purification system of hydroponic biofilter method compared with not putting in zoobenthos channel.

在水耕植物過濾法凈水系統(tǒng)中的植物栽培廊道中，通過投放2種底棲動(dòng)物螺螄和泥鰍延長食物鏈后99久久99久久久99精品齐，TN成人资源网亚洲电影在线观看网站、TP、TOC黄色毛片黄色网站、Chl.a的去除效果均比未投放底棲動(dòng)物的廊道有所提高欧美屁股眼子XXXXX视频。

Cage culture of the mandarin fish also decreased the dissolved oxygen concentrations, the species number and biomass of the zoobenthos around the cage area, but had no significant effects on the water temperature, pH, transparency, species composition of phytoplankton and zoobenthos, and the species composition and biomass of rotifers, cladecerans and copepods.

網(wǎng)箱養(yǎng)鱖同時(shí)減少了網(wǎng)箱周圍的溶氧、底棲動(dòng)物的種類數(shù)和生物量AAAAA级黄色网站，但對(duì)水溫国产免费女视频在线观看、pH值、透明度精品欧美一区二区在线观看欧美熟、浮游植物種類在线曰批视频大全免费、原生動(dòng)物種類以及輪蟲、枝角類和橈足類的種類和生物量影響較小偷拍区图片区综合图区第一页。