Abstract
In this paper, the methods such as Clumping index, Aggregate index, CASSIE index, Diffusion coefficient C, K index in negative binomial distribution and m*-m wao regression, Taylor power law were used to analyze the spatial distribution pattern of Thuja koraiensis community. The results showed that the spatial distribution pattern of Thuja koraiensis community presented significantly aggregate distribution. Based on 2×2 contingency table, interspecific association analysis was conducted by means of Variance ratio method, χ2-test, Association coefficient, together with point correlation coefficient, The overall relevance of pure forest community where Thuja koraiensis population were distributed and scattered forest of Thuja koraiensis community both showed negative correlation. In the pure forest community, Thuja koraiensis was extremely significantly negatively correlated with Sorbus pohuashanensis(p<0.01), and positively correlated with other shrub species, but did not reach a significant level. In the scattered forest community, Thuja koraiensis was positively correlated with Euonymus rehderianus, Lonicera edulis, Rubus sachalinensis, Acer tegmentosum, and negatively correlated with other species. Studies suggest that protecting species which are positively correlated with Thuja koraiensis to form an environment conducive to the survival of specific species together has certain guiding significance for the protection and utilization of Thuja koraiensis community.
Highlights
Spatial pattern analysis of populations is an important method to study population characteristics, interaction between populations and the relationship between population and environment and one of the hot spots of ecological research[1]
2.2.4 Overall Association Analysis The correlation between multiple species was simultaneously determined by the variance ratio method (VR), and statistics W was used to test the correlation between multiple species
(1)The results showed that: the aggregate distribution of Thuja koraiensis population is consistent with that of most rare plant species
Summary
Spatial pattern analysis of populations is an important method to study population characteristics, interaction between populations and the relationship between population and environment and one of the hot spots of ecological research[1]. The spatial distribution pattern of population and its changing trend are the main factors that influence the development of the number of population, the ecological and biological characteristics of the dominant population and its occurrence and development dynamics have a vital impact on the appearance, structure and succession direction of the community[2]. The researches mainly focus on ecological characteristics[6], growth rules[7, 8] and breeding experiments[9, 10] at home and abroad, while there is no report on interspecific association of Thuja koraiensis community. The study of spatial distribution pattern and interspecific association of Thuja koraiensis reflects the structure characteristics and interspecific relationship of Thuja koraiensis population, and helps to reveal the stability and succession mechanism of Thuja koraiensis population, which provides certain support for the breeding and protection of Thuja koraiensis
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