The phytoplankton community was mainly composed of Cyanophyceae, Euglenophyceae, Bacillariophyceae, and Chlorophyceae, and the dominant species were Oscillatoria subtillissima, Dactylococcopsis irregularis, Euglena caudata, Melosira granulata, Cyclotella meneghiniana, Chlorella vulgaris, and Scenedesmus quadricauda. The main environmental factors affecting the distribution of phytoplankton species in July were ammonium-nitrogen, dissolved oxygen, water temperature, and total phosphorus, while those in September were pH, water temperature, dissolved oxygen, transparency, and total nitrogen. Water transparency and zooplankton were the main factors affecting the biomass of Cryptophyceae, Pyrrophyceae, and Bacillariophyceae; while nitrogen, phosphorous, and dissolved oxygen were the main factors affecting the biomass of Cyanophyceae, Euglenophyceae, and Chlorophyceae.

結(jié)果表明：調(diào)查期間共鑒定出浮游植物384種欧美精选在线视频，隸屬于8門亚洲欧美日韩精品久久不卡，浮游植物密度范圍為2.01×105～57.60×105 cells·L-1又爽又色网站；群落組成以藍藻久久久久久久久久精品一、裸藻亚洲免费在线观看视频、硅藻和綠藻為主国产对白放荡AV，主要優(yōu)勢種有細微顫藻、無常藍纖維藻欧美、日韩黄片、尾裸藻未满18勿入网站、顆粒直鏈藻、梅尼小環(huán)藻性爱黄色网站无遮挡、普通小球藻欧美啪啪一级视频、四尾柵藻等；7月影響浮游植物分布的主要環(huán)境因子依次為銨態(tài)氮一级黄免费网站、溶解氧女被男啪到爽的视频网站、水溫和總磷，而9月的pH值五月婷婷精品视频6、水溫国产污片免费、溶解氧、透明度和總氮含量對浮游植物的分布產(chǎn)生影響較大一级黄色视频大片；其中强插在线观看，透明度和浮游動物量是影響隱藻、甲藻和硅藻藻類生物量的主要環(huán)境因子女的被男的c的免费视频，而藍藻搞那个黄色片来看一下、裸藻、綠藻主要受水體氮磷營養(yǎng)鹽濃度和溶解氧的影響夫妻自拍91。

The phytoplankton biomass altered from 4.22 mg/L to 22.31 mg/L, averaging 12.29 mg/L. The diversity index of the phytoplankton (H =0.96) was relatively low. The zooplankton identified belongs to 19 species, and its biomass ranged from 3.75mg/L to 7.74mg/L, averaging 5.93mg/L. The diversity index of the zooplankton was relatively low too. In the cultured rice fields, the phytoplankton identified belonging 53 gena, 6 phyla.

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It was the absolute amount of nutrient absorbed by the phytoplankton that limited their growth.

雖然營養(yǎng)鹽的濃度對浮游植物的吸收有一定的影響毛片一区二区三区四区播放，但是浮游植物吸收的營養(yǎng)鹽的絕對數(shù)量才是影響浮游植物生長的關(guān)鍵因素

As zooplankton become more abundant and eat more phytoplankton, the population of phytoplankton should shrink.

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The result of experiment in 2000 year and 2001 year suggests that primary productivity of Miyun Reservoir is decided by group constitution and cell density of phytoplankton. The character of nutrition is phytoplankton-responding type. The group structure belongs to Chlorophyta (51.64%)-Bacillariophyta (-28.68%) type.

2001年調(diào)查結(jié)果顯示，密云水庫初級生產(chǎn)力主要決定于浮游植物的群落結(jié)構(gòu)和細胞密度精品自拍日韩视频在线播放免费观看，營養(yǎng)特征為浮游植物響應(yīng)型在线播放欧美特级黄色视频，浮游植物的群落結(jié)構(gòu)為綠藻(51.6％)一硅藻(28.7％)型。

There was no significant difference on the density and biomass of phytoplankton between spring and summer.1.1.3 The dominant species of phytoplankton was as the following:Gomphonema sp.,Synedra sp.,Navicula sp.,Nitzsschia closterium,Cymbella sp.,Closterium sp..1.1.4 Comprehensive index demonstrated that the water quality was polluted slightly in Maqu section.1.1.5 A negative correlation was present between the density and biomass for phytoplankton and altitude in spring and summer.

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In the CO_2 source area, phytoplankton abundance was low and zooplankton mainly belonged to true estuary and estuary marine communities; while in the CO_2 sink area, phytoplankton was high and zooplankton mainly belonged to euryhaline marine communities.

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The methods used for collecting samples and establishing specific HAB cultures are described in detail. Methods of SEM and ESEM (environmental scanning electron microscope) for Gymnodinium were developed an...

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The total abundance of the phytoplankton ranged from 4.925×106 to 63.65×106 cells L-1and the total biomass from 1.632 to 20.420 mg L-1. Pseudanabaena sp. and Synedra ulna were dominant species in the community during January to March.

共檢測到浮游植物76種亚洲色黄hAV在线；浮游植物總的細胞數(shù)量在4.925×106-63.65×106cells L-1之間在线观看的黄色网站欧美日本，浮游植物的總生物量在1.632-20.420 mg L-1之間。

The converse observation, of the absence of grazers in areas of high phytoplankton concentration, led Hardy to propose his principle of animal exclusion, which hypothesized that phytoplankton produced a repellent that excluded grazers from regions of high phytoplankton concentration.

高的浮游植物集中的區(qū)域的缺少吃草的動物相反的觀察日本中文字幕系列网址，努力地引導(dǎo)計畫他的動物排除的原則人人操狠狠插，假定浮游植物生產(chǎn)了一個將吃草的動物排除在高的浮游植物集中的區(qū)域之外了的防水劑。