试论大地热流对地表环境与生态演变的影响

从地表自然生态系统发育与环境演变的一些难解之迷追索到地球内部能量的影响，对比世界各地主要地理单元的大地热流特征与生态环境特征发现，各地生态环境的优劣与区域大地热流的高低有密切的关系。典型森林生态系统的大地热流比较高，而典型荒漠生态系统的大地热流均比较低。大地热流不仅可能影响区域气候的干湿程度，而且还可能决定一个地区地表生态系统能量供给的下限，是区域生态系统发育与演变过程中一个重要的物种限制因子。大地热流低可能是导致一些盆地生态体系发育不良，进而演变成为沙漠的重要原因。研究大地热流对生态环境退化的影响和机理，了解区域生态体系和现代环境格局形成背景，以及区分环境和生态演化中自然和人文因素的作用具有重要意义，同时将为区域环境和生态建设以及管理决策提供科学依据。

Influence of the terrestrial heat flow on the evolution of thesurface ecosystem and environment

Some puzzling problems in the development of the natural ecosystem and environmental evolution on the surface of the Earth lead the authors to consider the role played by the energy from the Earth's interior.Comparing the ecological feature with the terrestrial heat flow of the main geographic units all over the world,the authors find that the quality of the ecological environment all over the world is close-ly related with the values of the terrestrial heat flow in a region.The typical forest ecosystem always devel-ops in regions where the terrestrial heat flow is quite high,while the typical desert ecosystem often devel-ops in regions where the terrestrial heat flow is very low.The heat flow from the Earth's interior ,which might not only influence the humidity of the regional climate,but also define the lower limit of the ener-gy supply for the ground ecosystem,is considered to be an important limiting factor for species in the de-velopment and evolution of the ecosystem in a region.The low terrestrial heat flow may play a major role in the desertification of some large basins.Study on the mechanism and influence of the terrestrial heat flow on the degradation of the ecological environment ,from which we will understand the background for the formation of the ecosystem and the environmental frame in a region and may distinguish the influence of human factors from natural factors on the evolution of the ecosystem and the environment ,will provide a scientific basis for making decision in the management and construction of the ecological system and en-vironment for a region.