Tree species spatial isolation degree evaluation method based on neighbor relation

Abstract

The invention discloses a tree species spatial isolation degree evaluation method based on a neighbor relation, and belongs to the field of tree species spatial distribution diversity and complexity evaluation. The invention aims to solve the problem that the existing index for evaluating the inter-tree mixing degree based on the neighborhood relationship cannot comprehensively evaluate the inter-tree space isolation relationship in practical application. The method comprises: determining a target tree and a neighbor tree; calculating the simple mixing degree of the target tree and a pluralityof neighbor trees; determining a plurality of neighbor tree species, obtaining the cumulative number different from the target tree species in the plurality of neighbor tree species, and calculatingthe tree species proportion of the cumulative number relative to the total plant number of the plurality of neighbor trees; calculating and obtaining the diversity mixing degree of the tree species; determining that every two adjacent neighbor trees in the plurality of neighbor trees are cumulative times of different tree species; calculating the occupancy ratio of the cumulative number of times to the total number of neighbor trees; and finally obtaining the spatial mixing degree of the tree species, wherein the tree species space mixing degree is used for evaluating the isolation degree of the tree species space. According to the invention, the spatial measurement of tree variety can be realized.

Description

technical field [0001] The invention relates to a tree species spatial isolation degree evaluation method based on a neighbor relationship, and belongs to the field of tree species spatial distribution diversity and complexity evaluation. Background technique [0002] Forest structure determines the forest ecological service function. The more complex the internal structure of the forest, the more stable its ecosystem. [0003] The forest structure can be divided into vertical structure and horizontal structure. In the structure, the abundance of tree species has nothing to do with the location, and the mixed relationship of tree species is related to the location. At present, the evaluation of the horizontal spatial structure of the forest is mainly carried out in three aspects: the horizontal distribution pattern, the size ratio of the trees, and the mixing degree of the trees. [0004] The index for evaluating the degree of mixing between trees based on the neighbor rel...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing index for evaluating the degree of intermingling between trees based on the neighbor relationship cannot comprehensively evaluate the spatial isolation relationship between trees in practical applications, and provides a method for evaluating the spatial isolation degree of tree species based on the neighbor relationship

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