四种插值公式在荒漠植被种群公布格局研究中的应用探讨

本文根据四种插值公式计算与野外实测数据的对比分析,利用优先关系定序法,筛选出一种较适合于荒漠植被种群分布格局研究的模式——三角形方法。它揭示了新疆莫索湾沙区荒漠植被群落结构的基本特征,具有失真小、精确性高、实用价值大等优点,为研究荒漠植被群落演替动态,提供了一个定量方法。

APPLICATION OF FOUR SCHEMES OF INTERPOLATION FOR SPATIAL PATTERN DISTRIBUTION STUDY OF DESERT COMMUNITY

In this paper, it is selected that a model which is fittest for spatial pat-tern distribution study of the desert vegetation community---triangular mod-el (2), according to the contrast and analysis of counting results with thefour schemes of interpolation between theoretical count and actual survey, ma-ke use of a method which determing the order in their preferntial relation.It brought to light the basic feature of community structure in the region ofXing Jiang Mosuowan desert. It has such characterists of the much useful valueaud the high accuracy, provides a quantitative method for study ing the dev-elopmen of succession of community in desert vegetation. The results are as follows: (1) The distribution type of each inviduality in species is always ablock distribution that of a patch in species is always the centre distribution. (2) In the community structure of Horaninowia Ulicina---Salsola Impl-icata/Aristida Pennata, the spatial pattern of distribution of species Horani-nowia Ulicina and Aristida pennata is interdigitated, a large amount of patchis overlapping between the Horaninowia Ulicina and Salsola Implicata. (3) The export limit of pattern distribution of community expands asthe density of per herbage goes down. (4) The disposition relation of species in space is directly mirrored byits inlaid pattern and it is effected not only by the evident competction witheach other for common and limited resources of desert (water, soil etc),but also by the habiat condition selected.