你所指的是世界上十大主要的土地生态系统。
You refer to ten major types of land ecosystem in the world.
湿地松是一种适合沙化土地生态系统重建的先锋植物。
Pinus elliottii had been found as pioneer plant suitable for sandy land ecosystem reconstruction.
结果表明，该县土地生态系统功能低下，系统的能量转化效率及稳定性较低。
The results show that the function of the land ecosystem is low, the energy conversion efficiency and the stability is not high.
芦笋既具有适应风沙化土地生态系统特点的生物学特征，又具有很好的经济价值。
Asparagus not only has high economic and nutritional value, but also has it biological characteristic of adapting to the ecosystem of wind-sandy wasteland.
应用系统论的观点建立了黑泉库区土地生态系统模型，并对系统多因子进行了定量分析。
Using systematic view, the land ecological evaluation model of Heiquan reservoir area is set up, and many factors in system are analysed quantitatively.
应用系统论的观点建立了跋山库区土地生态系统模型，并对系统多因子进行了定量分析。
Land ecological model system is set up by using systematic idea, and multi-factors are analysed quantitatively.
耕地作为土地资源的精华，是最重要的农业生产资料，也是保障土地生态系统稳定和优化的基础。
Cultivated land resources, as the essence, is the most important means of agricultural production, but also protect the land ecosystem stability and the basis for optimization.
城市化进程也是一个对原有土地生态系统的改变过程，但对于市地和农地而言，城市化对它们的作用形式并不一样。
The process of urbanization always involves land eco-system change, but it exerts impacts in different forms on farmland and urban land.
研究结果表明，根据土地类型所处的土地生态系统的演替阶段来判定土地退化程度，是目前比较简便而又切实可行的土地退化评价方法。
The results showed that it was a simple and practical method, which was based on the ecosystem succession stage of land types to assessment land degradation.
长江流经多种不同的生态系统，是诸多濒危物种的栖息地，灌溉了中国五分之一的土地。
As a habitat for many endangered species, the Yangtze River flows through diverse ecosystems and irrigates one-fifth of China's land.
这一点是通过考虑地方需求、土地能力和自然生态系统的功能来实现的。
This is done by looking at local needs, land capacity and the functioning of natural ecosystems.
他不仅考虑了温室气体的排放量，也研究了各种燃料对生态系统的影响，例如土地占用和水污染等等。
He considered not just the quantities of greenhouse gases that would be emitted, but also the impact the fuels would have on the ecosystem - taking up land and polluting water, for instance.
由于过度伐木、自给农业的焚烧土地和捕猎，森林生态系统遭到了严重的破坏。20种马达加斯加特有的狐猴将会消失。
Forest ecosystems are being destroyed by logging, burning for subsistence farms, and poaching. The 20 species of lemurs for which Madagascar is renowned are in danger of disappearing.
更何况，我们对土地不同的使用方式意味着地球是一个不同生态系统的镶嵌画，而不是一个更大的彼此相接的栖息地。
And it doesn't help that all of the different ways we use land means that the Earth is pretty much a Mosaic of different ecosystems rather than larger, contiguous habitats.
土地的无序开发会对生态系统造成无法估量的损害。
The unplanned exploitation of land can cause immeasurable damage to ecosystem.
它既是一个把土地的自然生态系统变为人工生态系统的过程，也是一个自然、经济、社会诸因素综合作用的复杂过程。
It is a land of natural ecosystems into artificial ecosystem process, is also a natural, economic, and social factors at the complex process.
摘要：湿地作为一种特殊的生态系统和土地资源，近年来由于环境日益恶化导致其面积大大减少。
Abstract: : The wetland is a special ecological system and land resources, in recent years due to the deteriorating environment in the area reduced greatly.
土地是生态系统的基础，是经济活动必要的生产要素。
Land is a basis for the existence of ecosystems, which is the most important economic activity factor of production.
高产田建设规划不应只是建立在对现实土地利用系统结构优化的基础上，还应当建立在改善农田景观生态系统的基础上。
High output farmland planning is not only built on the base of optimizing land use system structure but also on the base of improving farmland landscape ecologic system.
土地资源利用系统是一个复杂而巨大的社会、经济和生态系统，传统的定性与定量方法难以有效地解决土地资源利用系统的问题。
The land resources utilizing system is such a big and complicated system concerning with society, economy and ecology that we can not efficiently resolve this problem by traditional methods.
研究土地利用变化对区域生态系统服务价值的影响具有重要意义。
It is of significance to study the effect of land use change on ecosystem service values.
不合理的土地利用方式和对森林的不合理砍伐导致脆弱的土壤系统和森林生态系统的严重退化、生产力下降和严重的水土流失。
Irrational land use and forest cutting have resulted in the serious degradation, the decrease of land productivity and the water and soil erosion in the fragile soil system and forest system.
在山与山农业生态系统的特点是很少的灌溉土地，地势崎岖。
The Hill and Mountain agro-ecosystem is characterized by very little irrigated land and difficult terrain.
因此，系统维护与保育整个生态系统，实现整个区域的生态型土地整理，是今后土地整理工作的重点和难点。
So the future focus and difficulty are to realize the ecological land arrangement from the point of view of cultivating ecosystem.
以贵阳市区为例，选取自然生态系统指标、社会经济系统指标和农田污染系统指标，建立了土地资源评价模型。
By taking Guiyang City as a case study, the indices for the natural ecosystem, society economy system and cropland pollution system were chosen and the land resource evaluation model was established.
以贵阳市区为例，选取自然生态系统指标、社会经济系统指标和农田污染系统指标，建立了土地资源评价模型。
By taking Guiyang City as a case study, the indices for the natural ecosystem, society economy system and cropland pollution system were chosen and the land resource evaluation model was established.
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