群落

Objective To grasp the community composition and structure of ectoparasite fleas on rodents in the Tarim Basin.

目的掌握塔里木盆地啮齿动物体外寄生蚤的群落组成和结构。

Species richness and abundance indices varied significantly in different types of ectoparasite communities among different hosts.

鼠类体外各寄生虫群落物种丰富度和多度随宿主动物种类不同而变化较大。

The diversity of litter-laser beetles was investigated in Wuyishan Nature Reserve. Four areas were selected. Xujiachang, Tongmuguan, Shisigongli and Huanggang-Mountain. We built up 22 plots mainly using pitfall traps. 16 beetle families, were found among the 1625 captured specimens, of which 31.0% was. Staphylinidae and 22.6% was Carabidae, Elateridae, Chrysomelidae and Searabaeidae were each above 5% of the todal.

2006年对江西武夷山自然保护区4个地区徐家厂、桐木关、十四公里和黄岗山进行地表甲虫群落组成和多样性的调查，共设样地22块，主要采用巴氏罐诱法、采到标本1625号，隶属16科以隐翅虫科数量最多，占总数的31.0%，步甲科次之、占22.6%，叩甲科叶甲科和金龟子科的数量各占5%以上，它们共同构成该地区地表甲虫的优势类群。

To transplant Elodea nuttallii,Potamogeton crispu in winter when water level is lower and its transparence is higher than other season is an effective way to establish pioneer submersed plant community.

利用冬季水位低、透明度相对高的时机种植伊乐藻、菹草等这些适合冬春季生长的沉水植物是建立沉水植物先锋群落的一个有效途径。

Ordosica community. Those changes accelerated decomposition of A. ordosica litter and soil transpiration, promoted the release of calcium ion and carbon dioxide, thus enhanced the eluviation and precipitation of calcium carbonate in soil of A. ordosica community.

这些变化促进了油蒿枯枝落叶的分解，加速了Ca(上标 2+)的释放，促进了土壤呼吸，促进了土壤中CO2的释放，进而促进了油蒿群落土壤中CaCO3的淋溶和淀积。

Morphologically, embryonic stem cells developed from unicells into compact three-embryonic layer embryoid body and into incompact cell population.

胚胎干细胞在形态学上由单细胞发育为致密的包含3胚层结构的拟胚体，再继续分化为松散的细胞群落。

Processing area air temperature is slow drop, relative humidity is slow increase, small habitat is improved apparently, form processing area zoology basically to regain the advantage with benign loop, for the advantage the tree is planted form stable and top class community, the silvan ecosystem outside enchase and blending in area levelled road.

治理区域气温缓慢下降，相对湿度缓慢增大，小生境明显改善，基本形成治理区域生态恢复和良性循环的有利条件，为优势树种形成稳定顶级群落，镶嵌和融入区域外的森林生态系统铺平了道路。

International forest canopy networks have been established worldwide. To understand the relationship among community characteristics, environmental factors and epiphyte dynamics, and develop effective and standard methods and technologies for the study of forest canopies, more work is needed in this field.

由于世界各地森林类型多样和环境条件各异，目前国际上有关附生物的研究仍十分活跃，建立了林冠研究网络，研究不同类型森林中附生植物及其枯死残留物的动态及其与群落特征、环境因子的数量关系，探讨、交流和发展有效的标准测量方法和技术是该领域研究的主要内容。

The benefits of development are not shared equitably and the gap between rich and poor is widening.

群落在逐渐遭到破坏。发展的好处未能被公平分享，贫富之间的差距正在扩大。

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.

结果表明：调查期间共鉴定出浮游植物384种，隶属于8门，浮游植物密度范围为2.01×105～57.60×105 cells·L-1；群落组成以蓝藻、裸藻、硅藻和绿藻为主，主要优势种有细微颤藻、无常蓝纤维藻、尾裸藻、颗粒直链藻、梅尼小环藻、普通小球藻、四尾栅藻等；7月影响浮游植物分布的主要环境因子依次为铵态氮、溶解氧、水温和总磷，而9月的pH值、水温、溶解氧、透明度和总氮含量对浮游植物的分布产生影响较大；其中，透明度和浮游动物量是影响隐藻、甲藻和硅藻藻类生物量的主要环境因子，而蓝藻、裸藻、绿藻主要受水体氮磷营养盐浓度和溶解氧的影响。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。