群落

The biomass, productivity and efficiency of radiation utilization in Cryptocarya concinna community in Dinghushan Biosphere Reserve were investigated.

摘 要：报道鼎湖山自然保护区黄果厚壳桂群落的生物量、生产力和光能利用效率。

In the Cryptocarya community, the reason for Cryptocarya concinna having high relative frequency and relative abundance is probably not it has wider range of resistance to soil variables but the range of its resistance has much wider spread in broad-leaf forest habitat, or it may just has a wider range of resistance to the limiting factor.

在厚壳桂群落，黄果厚壳桂之所以具有较高分布频度与多度，并非它对所有土壤因子具有较宽的容忍性，而可能是它能容忍的范围在阔叶林生境有较广的分布，或它仅对极限因子的容忍有较广的范围。

Cryptocarya chinensis had lowgenetic diversity and roughly distributed them equally in the subpopulations with mediagenetic divergence,the individuals showed high similarity with a few of loci frequencychanged.

厚壳桂的遗传多样性相对较小，同时这种多样性在亚种群间分布也较为均匀，所有个体之间的差异小，只有较少的位点频率发生了变化，变化的程度中等，AMOVA分析表明其在群落层次上的遗传分化中等。

In order to investigate the succession of soil microbial community with ecosystem development, soil samples of three successional stages (i.e., barren stage, cryptogamic crust stage and herbaceous vascular plant community stage) from two tailings wastelands (Yangshanchong tailings wasteland discarded in 2001 and New Tongguanshan tailings wasteland discarded in 1991) were collected and soil microbial biomass was determined by methods of typical plate culture' and molecular biology.

该研究以2处（即，铜陵杨山冲尾矿废弃地和铜官山新尾矿废弃地）不同时期弃置的、处于3个演替阶段（原生裸地阶段、隐花植物结皮阶段和草本维管植物群落阶段）的铜尾矿废弃地为研究对象，利用传统培养法和分子生物学法相结合的手段对土壤微生物量和土壤微生物群落结构变化及其影响因素进行了调查。

Does Fine-root Litter of Castanopsis carlesii and Cunninghamia lanceolata Decompose Fastest in Its Own Community?

米槠与杉木细根凋落物是否在自身群落中分解得更快？

Changtan Jigongshan Nature Reserve within the protection of existing native vegetation intact Cyatheaceae communities, the number reached more than 800 strains, of which more than 400 years old plants, trees up to 4 meters, nearly 20 square meters crown.

长潭自然保护区鸡公山内现有植被原生保护完好的桫椤群落，数量达800多株，其中大植株树龄400多年，树高达4米，冠幅近20平方米。

Cyatheaceae Jigongshan community is now focused on the protection of the relevant departments and Changtan Nature Reserve has become an eco-tourism attractions, people watching Cyatheaceae feel beautiful natural environment, can also be informative, fun temperament.

鸡公山桫椤群落现已得到有关部门的重点保护，并已成为长潭自然保护区生态旅游的一处新景点，人们在观赏桫椤、感受大自然优美环境的同时，亦可以增长见识，陶冶情趣。

The predominant genera in most sampling sites were Fragilaria, Navicula, Cymbella and Gomphonema, but the dominant Cyclotella only in the Long Lake.

脆杆藻属、舟形藻属、桥弯藻属和异极藻属常为优势属，只在长海是以小环藻属为单一优势属的群落。

The results showed that,in different typical fields,all kinds of weeds belong to 22 families,55 species mainly including Gramineae,Compositae,Cruciferae,Chenopodiacea,Caryophyllacea,Cyperaceae and so on.The distribution of weed clony in different fields has apparent differenciation.Relative abundance analysis indicates that a...

研究结果表明，调查样地出现的各种杂草种类共22科，55种，主要为禾本科、菊科、十字花科、藜科、石竹科和莎草科等；不同作物田块的杂草群落的分布存在显著差异；通过对相对多度的分析，开封郊区的杂草种类可主要分成两个聚类。

It indicates that Salix spp., Caragana jubata and Dasiphora fruticosa show relatively higher adaptability during community succession from almost bare land.

柳、鬼箭锦鸡儿和金露梅均在群落几乎从裸地开始的演替过程中，对贫瘠土壤及强光照条件表现出较强的适应能力。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。