1. 木林子大样地两个木姜子属物种空间分布格局及关联性.
- Author
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黄 小, 姚 兰, 艾训儒, 朱 江, 朱 强, 王 进, 吴漫玲, and 刘松伯
- Subjects
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STATISTICAL correlation , *HABITAT selection , *NATURE reserves , *NATIONAL parks & reserves , *ADULTS , *COEXISTENCE of species , *HABITATS - Abstract
In this paper, species of the same congeneric species(Litsea pungens and L. elongata )in large sample plot of 15 hm2 in Mulinzi National Nature Reserve of Hubei Province were taken as the study object. The spatial distribution pattern, intraspecies and interspecific spatial correlations of the two species were analyzed by pairwise correlation function and different zero models(complete spatial randomness, heterogeneous Poisson and antecedent condition), and the construction mechanism of the community was discussed from the point of view of the spatial distribution pattern of the same congeneric species. The results were as follows:(1)In the study of population spatial distribution pattern, the spatial distribution pattern of the two species was generally aggregation distribution. The aggregation scales on the basis of the CSR zero model, the L. pungens and the different diameter stages(sapling, small tree, medium tree, adult tree)were 0-114 m, 0-103 m, 0-56 m, 0-34 m, and 0-16 m, respectively, and the aggregation scales of the L. elongata and the different diameter stages were 0-150 m, 0-150 m and 0-59 m, 0-56 m and 0-14 m; On the basis of the HP-zero model, the spatial distribution pattern of the whole L. pungens was 0-23 m, where in all of the sapling, small and medium trees were 0-22 m, and the aggregation distribution of adult trees was only on the scale of 0-3 m. The aggregation scale of the whole spatial distribution pattern of L. elongata was 0-36 m and 140-150 m, and the aggregation scale of each diameter grade was 0-35 m, 0-35 m, 0-12 m and 0-6 m.(2)In the study of intraspecific correlation, the intraspecies correlation of different diameter individuals showed positive correlation on a small scale, and became weakly unrelated or negative with the increase of scale.(3)In the study of interspecific correlation, the spatial relationship between the two species was about the same. On the whole, the two species showed positive correlation with another species within 30 m scale and negative correlation within 40-68 m scale, and there was no correlation between different diameter grades, and there was positive or negative correlation between the two species. It is considered that the spatial distribution pattern of the population is basically aggregation distribution, which is mainly affected by habitat heterogeneity and diffusion. The spatial distribution patterns of L. pungens and L. elongata in large sample plot are similar, and different habitat preferences may be the cause of the coexistence of the two species. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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