查询词典 species

It is difficult to identify related species of the genus Euglena and to separate different strains of the same species because the morphological characters are variable and limited.

因其形态特征有限并且易变，很难鉴定眼虫的相似种和同种内不同的株。

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。

To understand the characteristics of the community with dominant species of a invading injurious weed, Eupatorium odoratum, which is widely distributed in Guangxi Province, the floristic composition, geographic elements, life forms, species diversity in the community as well as community structure were investigated.

对隆安屏山石灰岩山地有害的入侵杂草飞机草群落的区系组成、地理成分、生活型、结构及物种多样性进行统计分析，结果表明：该群落内常见的维管植物约有62种，隶属38科58属。

About 75 species: temperate Eurasia, especially SW Asia and C and S Europe; six species in China.

大约75种：温带的欧亚大陆，特别是亚洲西南部和中部和南部的欧洲；中国有6种(2特有种)。

The diversity index was mainly affected by the number of bird species and evenness of population number among species.

群落多样性指数的高低主要受物种数量和各物种数量均匀度的影响。

The results showed that sample area influences the community species richness, species diversity index and evenness markebly.

结果表明：取样面积对群落物种丰富度、多样性指数及均匀度的测度结果具有明显影响。

Any species that can evolve into getting another species to look after them is one we can learn from.

从对它的学习中我们得到其中的一点是任何物种都能进化成另外一物种。

The plant diversity of the grassland would be changed after exclosure due to population growth and decline, disappearance of some species and immigrant of new species.

由于围封后种群的消长、某些种群的消失及新种的进入导致草地在围封后的植物多样性也发生变化。

This research was conducted in degraded rangeland at the southwestern edge of the Mu Us sandland, Yanchi county, Ningxia, the soil seedbank features and its relation to vegetation was analyzed using similarity analysis and ordination method, the results show that seeds within soil distribute mainly in 0~5 cm soil layer, less seeds in 6~15 cm soil layer in exclosed and non-exclosed rangeland, for seeds in exclosed soil, species richness and diversity index H are higher, while D is lower, exclosure measure, generally speaking, can increase plant species and amount of vegetation and seeds in soil, some annual plants, mesophytes and halophytes appears in the soil or surface.

以毛乌素沙地西南缘宁夏盐池县的退化草场为研究对象，采用相似性分析和排序方法对封育和未封育草场土壤种子库的特征及其与地上植被间关系进行了研究，结果表明无论封育区还是未封育区，土壤种子库中的种子主要分布于0~5cm的土层，6~15cm土层的种子数很少；封育区土壤种子库的物种丰富度大于未封育区，物种多样性则表现为H 值较大，而D值较小，总体上看封育措施可以提高地上植被和土壤中种子的种类和数量，一些一年生植物、中生植物和盐生植物开始出现在地面或土壤种子库中。

This text book addresses behavior, habitat, husbandry and diet for each species, recognizing that the majority of medical problems in keeping exotics are due to a lack of species-specific information.

本教科书地址行为，栖息地，畜牧业和饮食对每个品种，认识到保持异国的原因有二种特定的信息缺乏医疗问题的大多数。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。