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- Title
神农架天然针阔混交林群落的种间联结性.
- Authors
周秋静; 赵常明; 舒化伟; 葛结林; 赵本元; 杨林森; 姜治国; 陈芳清; 谢宗强
- Abstract
We selected 1 hm2 dynamic monitoring plot of a natural mixed needle-and broad-leaved forest community in Shennongjia National Park, variance ratio (VR), χ2 test, and association coefficient (AC) were used to determine the interspecific association of dominant species of tree, shrub and herb in the community. The results were as follows: (1) According to the χ2 test, the positive-negative correlation ratios of the dominant species of tree, shrub and herb layers were 0.70, 0.61 and 1.14, respectively. VR measured the overall association of each layer had a significantly positive correlation, the community was succeeding in a stable direction. (2) From AC, there were 32.05% negative association pairs in the tree layer, the coniferous and broad-leaved dominant species had a highly competition, and the positive correlation existed only between broad-leaved species. The shrub layer and the herb layer had 48.89% and 34.17% negative correlation pairs, respectively. It was due to the competition of limited resources by species with similar ecological characteristics. There were 65.38%, 35.56%, and 44.17% unrelated species pairs in the arbor, shrub, and herb layers, respectively. It may be that the species occupied a suitable niche and the dependence between species was reduced. It showed that a few pairs tended to the same habitat and species had a positive correlation. Due to the excessive overlap of niches, resource competition made a large number of pairs perform negatively. And more dominant species had weak connection due to occupying the appropriate niche.
- Subjects
COMPETITION (Biology); COMMUNITY forests; STATISTICAL correlation; NATIONAL parks &; reserves; SPECIES; COEXISTENCE of species
- Publication
Guihaia, 2020, Vol 40, Issue 2, p255
- ISSN
1000-3142
- Publication type
Article
- DOI
10.11931/guihaia.gxzw201903029