生态系统成分

尽管其主要植物科属是热带生态系统成分，但已经到了其分布的北缘。

Consequently , although most of the families and genera of the flora are components of tropical ecosystems , many have reached their distribution limits in latitude .

土地利用变化引起了生境质量下降、边缘效应增强、土地退化和生态系统成分单调等景观生态效应。

Thirdly , land-use changes have caused distinct effects on landscape ecology , such as environmental quality declining , edge effects intensification , land degradation and landscape elements reducing .

微生物是生态系统的组成成分、最主要的分解者，推动着生态系统的物质循环与能量流动。

Microorganisms are compositions and main decomposers of ecosystem , which promote material cycle and energy flow in ecosystem .

昆虫和病原体是森林生态系统的固有成分，通常其密度相对较低，所造成的损害较小，对树木生长及其活力的影响微乎其微。

Insects and pathogens are integral components of forest ecosystems and normally are present at a relatively low density , causing little damage , and having negligible impact on tree growth and vigour .

作为森林生态系统重要的成分之一，土壤微生物在森林生态系统的物质循环和能量流动中具有十分重要的和不可替代的作用，并受到生物和非生物因素的综合调控。

As one of the most important components in the forest ecosystem , soil microbe plays a key and irreplaceable role in material cycling and energy flows , but it is regulated by many biotic and abiotic factors and their interacted effects .

生态系统中各成分的属性，对水土流失起到促进、加速、叠加或抑制、延缓、缩小的正负作用，从动力学的观点看其实质是加大或减小了石漠化形成的动力强度。

The properties in each element of the ecosystem played a role on stimulating , accelerating and overlapping or restraining , lessening erosion of soil and water , its essential was the enhanced or weakened intensity of motivity from a kinetic viewpoint .

植物病原菌作为森林生态系统的重要组成成分及调控因子之一，在森林动态中扮演着重要的角色。

As a component and regulator in forest ecosystem , plant pathogens play an important role in forest dynamics .

陆地表面的70%为植被所覆盖，植被是陆地生态系统的基本组成成分。

Vegetation is one of the most important components of the ecosystem with 70 percent of the land surface coverage .

城市绿地是城市生态系统的重要组成成分，能有效地缓解城市热岛效应。

Urban green space is a significant component in the urban ecosystem , which can effectively decline the heat island effect .

野生动物是生态系统的重要组成成分，在不同生境中有着与其生态功能相一致的表现特征。

Wildlife as an important component plays a very important role in ecosystem , and its ecological functions are known gradually .

土壤是陆地生态系统的重要组成成分，其较小幅度的变化即影响到陆地植被的养分供应，同时可能影响到碳向大气的排放而加剧全球气候变化。

Soil is one of the most important parts of land ecosystem . Even the small range of change of it would influence nutrient supplies of land vegetations , and could bring about variation of soil carbon being discharged into the atmosphere and intensify the global climate change .

然后将信息化教学资源的建设与应用视为有机、复杂、统一的生态系统，分析信息化教学资源生态系统的组成成分、结构、功能、特性。

Then , analyzing the information of ecosystem composition , structure , function , properties , which is teaching resources as construction and application of organic , complex , unified ecosystem .

首先论述陆地生态系统对全球变化的调节作用，主要包括陆地生态系统对大气成分的调节以及对全球气候的调节；

First , the adjustment action of terrestrial ecosystem for global change is discussed , mostly included the adjustments of terrestrial ecosystem for atmospheric composition and global climate ;