首页|Habitat associations of saplings and adults in an old-growth temperate forest in the Changbai mountains, northeastern China
Habitat associations of saplings and adults in an old-growth temperate forest in the Changbai mountains, northeastern China
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国家科技期刊平台
NETL
NSTL
万方数据
Species-habitat association analysis is useful to detect spatial arrangement of individual plants, to discover rules about the distribution of species and to generate hypotheses about the possible underlying process controlling observed structures. Quantifying methods were used to classify habitats in terms of topographical variables in a mixed temperate broad-leaved Korean pine forest of the Changbai mountains in northeastern China. All of the 625 20 m × 20 m quadrats of the plot could be unambiguously assigned to one of three habitat categories (low-plateau, high-plateau and slope). Torus-translation tests were used to estimate species-habitat associatious. Many species are clearly distributed in a biased fashion with respect to habitats. Fifteen (55.6%) out of 27 species showed strong positive or negative association with specific habitats. We compared species-habitat associations at the sapling and adult stages. Adjusted density values indicated few species exhibit extremely strong habitat associations. Only 9 out of 26 species had adjusted densities ＞ 3 in the habitat for which they had strong positive affinity. Few species show the same associations at the small tree and large tree stages. Only 3 out of 22 occurring associations with a specific habitat appeared to have a consistent habitat association at the two stages. These results suggest that species-habitat associations exist in the 25-ha plot of the temperate forest of the Changbai mountains. Owing to limitations in our statistical methodology, we partly underestimated associations by ignoring rare species.Regeneration niches can contribute to co-existence, but regeneration niches due to habitat associations play a limited role in species co-existence, since most species show a similar trend in habitat associations at the sapling and adult stages. We should pay more attention to shifts in habitat associations, i.e. niche shifts at different stages of existence.
niche differentiationhabitat associationenvironmental heterogeneitysaplings and adultslife stages
YE Ji、HAO Zhan-qing、XIE Peng、LI Jing-gong
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Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, P. R. China
Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Jilin Provincial Academy of Forestry Sciences, Changchun 130033, P. R. China
The Changhai Mountain Natural Reserve Administration, Changbaishan 113613, P. R. China
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国家自然科学基金国家自然科学基金国家自然科学基金Public Benefit Research Foundation of State Forestry Administration,China
国家科技期刊平台
NSTL
万方数据
