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natural environment
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  natural environment
This paper briefly presents the research progress of the State Major Basic Research Project 2001CB309400, "Theory and Application for Retrieval and Fusion of Spatial and Temporal Quantitative Information from Complex Natural Environment".
      
Trivalent iron almost always prevailed in the acid-extractable fraction in the natural environment.
      
The calculations showed that in the natural environment, the additional light-induced heating of zooxanthellae is not above 0.01°C and that it cannot cause disruption of the animal and zooxanthellae symbiosis.
      
Observations on the development of the dinoflagellate Gyrodinium falcatum in the natural environment (Sea of Japan) and algal cultures were made.
      
The problem is extremely urgent since at least one welded joint failure leads to enormous costs of repair, may cause an environmental disaster and in ict irreparable damage on natural environment.
      
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In damp tropical districts, there is plenty of light, heat and water, so the conversion of matter is extraordinarily rapid, the kinds of organisms extremely multifarious, and the energy exchange between organisms and matter in the environment very frequent. Changes in space distribution and time are apparent, and so organisms have acquired very sensitive reaction. When organic communities change, there follows the rapid variation in environmental conditions. Therefore, the unified, organic integrity of organisms...

In damp tropical districts, there is plenty of light, heat and water, so the conversion of matter is extraordinarily rapid, the kinds of organisms extremely multifarious, and the energy exchange between organisms and matter in the environment very frequent. Changes in space distribution and time are apparent, and so organisms have acquired very sensitive reaction. When organic communities change, there follows the rapid variation in environmental conditions. Therefore, the unified, organic integrity of organisms and environment must be studied as a system, and especially as a dynamic system.Thus the theories and methods of systematics can be introduced into biogeography and the biogeoraphical process can be reproduced by means of analogue. of course, this process is very complicated and difficult to analogize. Nevertheless, the chief processes, especially the decisive processes, can be analogized and some biogeographical models can be set up. By means of a computer, we can make quantitative analysis of the biogrographical processes and foretell the tendencies in the changes of these biogeographical processes. This way, we can reduce blindness in the exploitation, application and reformation of natural resources. We won't fell down large areas of forest to get timber, or destroy pastures to enlarge agrarian land, thus to avoid causing serious soil erosion or ecological maladjustment. We can exploit and safeguard the natural environment and natural resources in a rational way, build up an optimal artificial ecosystem and put the conversion of matter in nature in a sound cycle.

在热带湿润地区,光热丰富,水分充足,物质转化异常迅速,生物种类繁多,生物和环境间物质和能量交换频繁。空间分布和时间变化明显。环境条件变化,生物反映异常敏感;生物群体发生变化,环境条件也会随之发生变异。因此,须把生物和环境的统一有机整体当作系统来研究,尤须把它当作动态系统来研究。这样可以把系统论的理论和方法引入生物地理学中,对生物地理过程进行模拟。当然,生物地理过程十分复杂,进行模拟有较大难度。至少对其中主要过程,有决定性过程,模拟是可能的。建立起生物地理模式,利用计算机运算,对生物地理过程作定量分析,对生物地理过程的变化趋势可进行预测。这样,对自然资源的开发,对自然环境的利用和改造,可减少盲目性。不致于为了木材,大量砍伐森林;扩大耕地面,毁坏草场,引起严重水土流失,生态失调,出现严重后果。根据生物地理过程发展和变化的规律,可以合理利用和保护自然环境和自然资源,建立最佳人工生态系统,使自然界物质转化形成良性循环。

This paper describes the specificity of the natural environment, types and sorts of the plant resource and types and distribution of vegetation in Bao Tian-main protected area, which offer the scientific basis for further research- ing on development, utillization and protection of plant resources in this protectedarea. Bao Tian-main protect-range is in the area between sub-tropical belt and warm belt. It is rich in various natural resources, favorable for studying the kinetics of flora and fauna...

This paper describes the specificity of the natural environment, types and sorts of the plant resource and types and distribution of vegetation in Bao Tian-main protected area, which offer the scientific basis for further research- ing on development, utillization and protection of plant resources in this protectedarea. Bao Tian-main protect-range is in the area between sub-tropical belt and warm belt. It is rich in various natural resources, favorable for studying the kinetics of flora and fauna and natural complex; suitable to be a gene storage of flora and fauna source and a naturalizing area for sub-tropical plants trans- ferred to warm belt or warm plants to sub-tropical belt. It's also a forest base to conserve water according to its location on Chuan River upstream. Setting up this protected area, it will provide favorable condition for develop- ing agricultural production and improving natural ecological environment in Chuan River basin.

本文阐述了保天(山曼)自然保护区的自然环境特点,植物资源类型、种类、植被类型及其分布概况,为今后研究本区植物资源的开发利用与保护提供科学依据。保天(山曼)自然保护区处于我国北亚热带向暖温带过度地带,区内自然资源丰富多样,可作为综合自然体、动植物种群的动态研究基地,亦可作为动植物资源的基因库,南种北移、北种南移的驯化场所。保天(山曼)地处湍河上游,还可作为水源涵养林基地。保护区的建立将对湍河流域地区的农业生产发展和改善自然生态环境提供有利条件。

The paper described chiefly the natural environment, tropical forest distr-bution and it's plant resouces in Brazil.

本文扼要介绍了巴西的自然环境,天然森林分布及其植物资源。

 
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