摘要
ECOTONE为国际生态界最近重新定义的基本概念之一。本文在诠释生态环境脆弱带的定义之后,对其实质及其空间属性作了较全面的逻辑归纳。在进一步研究的基础上,对于生态环境脆弱带作出了独立的函数表达,并且就生态环境脆弱带的宽度指标、重迭度指标、脆弱度指标、综合性指标,提出了较严格的表述形式。它们吸收了生态界面理论,并把系统生态学中的非稳定性理论,广延为辨识“全球变化”的基本手段,从而在生态学理论与应用两个方面,体现了研究的意义和价值。
ECOTONE, a new definition of ecological field, was approved by the plenary session of Ⅶ SCOPE in 1988 (Budapest). In order to have a better understanding attributions, connotations, and significations of the term, we have already provided a systematic description and logical induction. In this article, the author would use the ecological boundary theory and the technique of information measure to develop the Index Series which can be applied to determine the basic properties of ECOTONE. Generally, these indeces Would include the breadth, the overlapness, the weakness, and the synthetical index expressing dynamic characteristics of ECOTONE.In biosphere, spatial generalization of ECOTONE could be summarized as follows:(1)Connecting zone between urban and country;(2)Mixture zone between arid and humid climate regions;(3)Intersection zone between agricultural and animal husbandry regions;(4) Join zone between land and water body;(5)The periphery of a forest; (6)The fringe of a desert;(7) Sudden change of the gradients (such as altitude, concentration, hardness, and so forth).
出处
《生态学报》
CAS
CSCD
北大核心
1989年第2期97-105,共9页
Acta Ecologica Sinica
