生态种群

The results indicated that Erigonidium graminicola, C.sinica were the major natural enemies affecting Aphis gossypii, followed by Tetragnathidae, Chrysopa septempunctata and Therdion octomaculatum.(6) The temporal and vertical niche breadth and overlap of Aphis gossypii and its natural enemies were analyzed.

从时间和空间两个角度对棉蚜与天敌种群的生态位宽度及其重叠情况进行分析，表明草间小黑蛛、大草岭、肖峭蛛等天敌在时间上和空间上均与棉蚜有较高的重叠度，可视为棉蚜主要天敌。

Corresponsive results acquired by setting parameters under different condition help to improve the management of agro-ecosystem.

针对不同环境条件设定相应的仿真参数，可以得到相应的害虫或杂草种群演化结果，有助于农田生态系统的科学管理。

Niviventer niviventer had the highest index of the niche breadth (1.00)while Rattus nitidus, Soriculus hypsibius, Blarinella quadrticauda and Crocidura attenuata had the lowest index of the niche breadth ...

空间生态位宽度指数的季节变化表明，社鼠种群分布没有明显的季节差异，中华姬鼠和安氏白腹鼠每年可能有一个数量高峰期，高山姬鼠一年则可能有两个数量高峰。

The microbes dynamics rule during tobacco life cycle in various types of soil might be a new consideration to understand the development of especial features of flue-cured tobacco. soil type ; edaphon ; dynamics ; flue-cured tobacco

因此加强对土壤微生物种群与土壤类型之间在烟叶生长期的相关规律研究，可以丰富烤烟根际微生态方面的内容，并为研究烤烟根际微生物与优质烟叶生产之间的关系，以及这种关系对烤烟产量品质的影响提供理论基础。1材

It is very valuable to discuss the endangered mechanism of Elaeagnus mollis Diels, endemic to China, which is seriously in danger presently.

摘要从种群生态方面，探讨山西南部濒危树种——翅果油树的濒危机制，具有重要的科学价值。

In the middle of 1980s,our country initiated Milu's reintroduction program,which made the quantity of Milu over 2000 individuals.The paper analyzes Elaphurus davidianus' values in food,medicine,leather,medical care,beauty,e...

分析麋鹿在食用、药用、制革、保健与美容、观赏、生态及文化方面的价值及目前种群发展存在着的近亲交配、分布点少、密度制约等问题，提出了保护与可持续利用对策。

The spatial distribution pattern and dynamics of four species of dominant plants Hippuris vulgaris,Eleocharis valleculosa,Blysmus sinocompressus and Suaeda glauca in wetlands of the Qinghai Lake were studied by means of spatial distribution analyses.

应用种群生态空间分布的分析方法，研究了青海湖四种主要湿地植物：杉叶藻、槽杆荸荠、华扁穗莞、碱蓬的空间分布格局及其动态。

A field experiment on the reproductive allocation of the annual plant Eragrostis poaeoides was carried out in the re-vegetated areas in Shapotou of the Tengger Desert.

繁殖是生命得以延续的唯一手段，它不仅是种群形成、发展和进化的核心问题之一，也是生物群落和生态系统演替的基础。

The niche breadth could be used as an index for evaluating the host specificity of gamasid mites, whose similarity in population distribution was largely related to that of their hosts, as well as their taxonomic distance.

生态位宽度可以作为评价革螨宿主特异性的定量指标，革螨种群分布的相似性与其宿主的相似性程度有着很大的关系，并受其动物分类学远近的影响。

Among different geographic stocks, Eulecanium kuwanai Kanda and Eulecanium gigantean Shinji has already produced heredity differentiation in the certain degree in Hebei province.

结果表明：皱大球蚧和瘤坚大球蚧在河北省不同地理种群之间已经产生了一定程度的遗传分化，在地理位置上由南到北随地理距离的增加、生态环境的变化，差异变得越来越大，遗传差异与地理距离呈正相关。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。