生态种

We choose the arid land of northwestern China as our study area because of its extensive area, specific geographical location, dry climate, varied topography, vulnerable ecosystems and long-term human disturbance, as well as the existence of current conflicts between economic development and environmental protection. Based on the literature, we choose ten desert species with clear and relatively accurate geographical distribution ranges to model their distributions:Anabasis brevifolia, Atraphaxis frutescens, Calligonum mon-golicum, Ephedra przewalskii, Gymnocarpos przewalskii, Haloxylon ammodendron, Haloxylon persicum, Ka-lidium cuspidatum, Salsola laricifolia, and Sympegma regelii.

：选择面积广阔、地理位置特殊、气候干旱、地形地貌多样、生态系统脆弱以及人类活动长期干扰，而且目前面临着西部大开发和环境保护双重矛盾的西北干旱区作为研究区域，通过收集西北干旱区多种优势种和常见种的地理分布资料，选取10种分布范围相对明确、资料相对齐备的荒漠植物种：短叶假木贼、木蓼(A- traphaxis frutescens)、沙拐枣、膜果麻黄、裸果木、梭梭柴、白梭梭、尖叶盐爪爪、松叶猪毛菜(Salsola lar- icifolia)和合头草，定量分析其地理分布与气候因子的关系，并据此估测其潜在中心分布区和潜在最大分布范围，与实际分布范围进行比较。

Benthic species have been identified, among which Mollusca and Arthropoda are dominant socials. As a fauna nature, the eurythermous-eurytopic species and the subtropical species predomi-nate absolutely over the others.

初步鉴定，物种共有97种，以软体动物和节肢动物占优势，同时，生态类群以我国沿海广温广布性种和亚热带种占绝对优势。

Pattern of use for these resources was analyzed from three vegetation types by examining species-specific niche breadths, overlaps and partitions of resource utilization as well as population sizes.

对于这些资源利用的格局是通过对存在于三种类型植被中蝗虫种的生态位宽度、资源利用的分化和重叠以及每种蝗虫的种群大小来分析的。

The avenue planting of nine cities in Zhejiang has the following characters: 1. Avenue planting tree species are plenty; 2. Avenue planting benefits among the cities are not uniform and tree species used are various; 3. Tree species used for avenue planting are simple and landscape effects unideal; 4. Cultivated manner and stratal structure are simple, ecological benefits no good; 5. The tree species ratio, of evergreen with deciduous, of fast-growing with slow-growing, is out of proportion, and short-term...

通过对浙江省具代表性的9个主要城市行道绿化状况的调查分析，结果表明浙江省城市行道绿化具以下几个特点：①行道树种资源丰富；②城市之间绿化效果差异悬殊，所采用的绿化树种各有侧重；③绿化树种单一，色彩单调，景观效果差；④栽植配置方式单一，层次结构简单，生态效益差；⑤常绿树种与落叶树种、速生树种与慢生树种比例失调，近期效益考虑多，远期效益考虑少。

This is a review of recent studies on the relationship between fire and invasive plant species.

在植物外来种与火生态因子的作用研究中发现，火与外来种的关系随物种生物学特性、火作用的时间、频度、强度不同而不同，火有时会有效地抑制外来种的生长和入侵，有时会促进一些外来种的生长和入侵。

Among the nektons, freshwater species (10 species) were the most abundant ecological groups, followed by estuarine (6 species), migratory (3 species), and coastal species (1 species).

生态类群主要以淡水性种类(10种)和河口性种类(6种)为主，洄游性种类(3种)和海洋性种类(1种)较少。

Study on the ecological effect of rice rhizosphere microbes under three water regimes and two nitrogen application levels was conducted in 2005 in pot experiment.

研究了3种水分模式（干旱交替型，浅水层连续灌溉型和控水模式）及分次施氮条件下，施氮对水稻根际土壤微生物生态效应的影响，结果表明：水稻根际土壤微生物生态效应，不仅仅受到水分条件和施氮的影响，还受到水分条件和施氮的交叉影响。

Cities are a type of socio-ecological system that has an expanding range of articulations with nature's ecologies.

城市是一种社会生态系统，与自然生态的对接范围一直在扩展。

Pyramid of numbers A type of ecological pyramid in which the number of individual organisms at each stage in the food chain of the ecosystem is depicted diagrammatically.

数量金字塔：一种生态金字塔类型，其生态系统食物链中每个阶段的生物个体的数量用图表描述。

Eco-citys theory basis and general principle of the evaluation index system of Eco-city were discussed in this paper. A new measurement method of harmony degree was also put forward in this paper.

本论文主要论述了生态城市的理论基础与生态城市评价指标体系的一般原理，提出了协调度测定的一种新方法。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。