Key species

A new key to species, and the information of the distribution sites of each taxon were given.

此外，重新编制了细莴苣属分种检索表，并较为详细地记录了每种的分布地点。

where there is 90 percent reduction of key species,

导致关键物种减少90%，

Discussion on the Changes of the List of Key Species of Wildlife within Provincial-protection in Shaanxi

陕西省重点保护野生动物名录增减变化商讨

A key to species, the citation of literature and specimens, and the distribution of the species are presented.

并列出了分种检索表、种的文献引证、标本引证和地理分布。

A bloom continuous Casting machine main cast quality steel and alloy steel, such as heavy rail steel, hard-line steel, spring steel, bearing steel, alloy structural steel, and other key species.

大方坯连铸机主要浇铸优质钢和合金钢，如重轨钢、硬线钢、弹簧钢、轴承钢、合金结构钢等重点品种。

A Key for Species Identification of Staple Fur Animals in China

中国主要野生毛皮物种识别检索表

Point out the community key species is species that result in serious impaired forest, its density with the constitute ratio and the degree of harm sapling is related.

指出群落关键种的实质是对林木造成严重危害的种群，其密度和组成比与林木的被害程度呈正相关。

Chemometrics have been used as a data mining tool to identify key species that would mostly affect the overall properties of feed and products.

而在解析庞大的分析数据时，可使用化学计量学方法来进行数据挖掘从而鉴定关键组分。

Rising Asian demand has coincided with low supplies for several key species owing to disease and high feeding costs in the aquaculture industry.

亚洲需求增长之际，由于水产养殖业遭遇瘟疫和饲料成本高企，数个关键物种的供应量偏低。

The key species index is the correlation coefficient that the degree of harm sapling and the rodent species density or constitute related analysis.

用林木受害程度与各种群密度或组成比的相关系数作为关键种指数。

The long term water use efficiency ( WUE), of key species in deciduous broad-leaved forest in Beijing Mountain area, is strongly related to relative humidity, solar radiation, vapor pressure deficit and temperature.

北京山区落叶阔叶林优势种的水分利用效率（WUE）与其所在地的气候条件有很密切的关系，特别是大气相对湿度、太阳辐射强度、饱和水汽压亏缺（VPD）和温度。

Key species can be the precedent target of the biodiversity conservation.

关键种可以是为了最大程度地保护生物多样性而进行优先保护的目标。

To protect key species is one of the important measures for keeping healthy life of the Yellow River.

关键物种的保护是维持黄河健康的重要措施之一。

At the same time, with the large sapling forest ecosystem is for the research object, bring up the concept of key species that with related the degree of harm sapling, and the calculation formula of key species index and distinguish the standard.

同时，以幼林生态系统为研究对象，提出了与林木危害程度相关的群落关键种的概念以及关键种指数的计算公式和判别标准。

Use the Theory of Niche and Key Species to Build Ecological Industrial Chain Network

应用生态位和关键种理论构建生态产业链网

Protecting the plant diversity, their environments and the key species, and perfecting the network of nature reserves.

以植物生境及其多样性保护为基础，以重点物种为主要保护对象，建立完善的自然保护区网络；

Evaluation on the Ornamental Characteristics and Utilization of the National Key Protected Species in Guangdong Province

广东省国家重点保护植物观赏特性及开发利用

Tamarix ramosissima, one of the most widely distributed plants of its genus, belonged to the key species for maintaining desert ecosystems in arid regions of China.

多枝柽柳是分布最为广泛的柽柳属植物之一，也是维持干旱区荒漠生态系统的关键植物种。

Key to species of China was provid-ed.

列出了中国大陆神蕊螨属已知种检索表；

The tiger occupies the top position of the food chain in ecosystem, so the key species in nature conservation and of important ecological and scientific value.

虎在生态系统中处在食物链的顶端，是自然保护中的旗舰物种，具有重要的生态价值和科学价值。

The extinction of key species could have cascading effects throughout the food web.

关键物种的灭绝可能通过食物链产生级联效应.

The results show that the basis of restoration of biodiversity is choosing the suitable pioneer and key species.

选择适宜的先锋种和关键种是恢复与发展物种多样性的基础。

Distinguishing Key Species of Aquatic Ecosystem of the Main Yellow River

黄河干流水生态系统关键物种的识别

A Discussion on the Key to Species in the Genus Oryza

稻属植物分种检索表的探讨

Geo-distribution Pattern and Protection Status Assessment for the Key Species of China

我国重要珍稀濒危物种与类群的地理分布格局及保护现状评价

Euphausia superba which belongs to Arthropoda Crustacea, is the key species to the Antarctic ecological system. It is rich in resources and has great potential for the development and use.

南极大磷虾隶属于节肢动物门甲壳纲，是南极生态系统的关键物种，资源丰富，具有巨大的开发和利用潜力。

The third idea is that city is an ecosystem provided with energy and resource system in its own way and mankind is the key species of the ecosystem.

第三个理念是城市是以自己的方式、拥有能源和资源流动系统的生态系统，人类是该生态系统的关键物种。

A working system should be set up in future, in which the ecosystem-based management is the core, and runs through the other three action plans: the key species conservation and restoration, important habitat protection and restoration, and the pollution control.

本文认为，应建立以生态系统为基础的管理机制，贯穿于关键种群的保护及恢复、重要生境的保护及修复和污染物控制等修复行动计划；

These include the centuries-old custom of "bul", where leaders would call a temporary stop to fishing for key species in order to give fish stocks an opportunity to replenish.

这些传统包括几个世纪以来被称之为“bul”的旧习俗，领导人会要求暂停捕捞一些重要与种类的鱼，给鱼类总储备量繁衍补充的机会。

Anchovy ( Engraulis japonicus) is a key species in the Yellow Sea ecosystem.

鳀鱼（Engraulis japonicus）是黄海生态系统的关键种。