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Featured researches published by Buhang Li.


Annals of Forest Science | 2009

Density dependence on tree survival in an old-growth temperate forest in northeastern China

Jian Zhang; Zhanqing Hao; I.-Fang Sun; Bo Song; Ji Ye; Buhang Li; Xugao Wang

Abstract• Density dependence is a major mechanism for shaping plant communities. However, its role in regulating diverse, mixed natural tree communities is less certain.• In this study we investigated density-dependent effects in a large-scale (25 ha) old-growth temperate forest in northeastern China. Spatial patterns of neighborhood distribution in the plot were analyzed using various methods for inferring competition, including (1) pair correlation function to determine spatial patterns of pre-mortality and post-mortality and (2) neighborhood analysis of individuals to examine the extent to which tree survival is correlated with other covariates.• Results showed that, for common species, 3 of 5 canopy species and 3 of 8 midstory and understory species were random in mortality. Negative density-dependent mortality was not found when trees reach 1 cm in DBH. There was no significant correlation for canopy species between tree survival and conspecific abundance, but largely positive correlations for midstory and understory species. In contrast, tree survival was found to negatively correlate with conspecific basal area for most species, indicating strong intraspecific competition. No strong interspecific density dependence was found in the forest.Résumé• La dépendance par rapport à la densité est un important mécanisme pour la formation des communautés végétales. Toutefois, son rôle dans la régulation de diverses communautés mélangées d’arbre est moins certain.• Dans cette étude, nous avons enquêté sur les effets densité-dépendance à une grande échelle (25 ha) dans une ancienne forêt tempérée, dans le nord de la Chine. Les modes de distribution spatiale de voisinage ont été analysés en utilisant diverses méthodes pour estimer la concurrence, y compris : (1) des paires de fonction de corrélation afin de déterminer les structures spatiales de pré et postmortalité et (2) l’analyse du voisinage des individus pour examiner dans quelle mesure la survie de l’arbre survivant est corrélée avec d’autres variables.• Les résultats ont montré que, pour les espèces communes, 3 des 5 espèces de la canopée et 3 des 8 de l’étage moyen et du sous-étage, la mortalité était aléatoire. Aucune mortalité densité-dépendante négative n’a été détectée lorsque les arbres atteignent 1 cm de diamètre à hauteur d’homme. Il n’y avait pas de corrélation significative pour les espèces de la canopée entre la survie des arbres et l’abondance conspécifique, mais il y avait des corrélations positives pour l’étage moyen et le sous-étage.• En revanche, la survie des arbres était corrélée négativement avec la surface terrière conspécifique pour la plupart des espèces, indiquant une forte concurrence intraspécifique. Aucune dépendance visible de la densité interspécifique n’a été détectée dans la forêt.


Ecological Research | 2008

Spatial variation of species diversity across scales in an old-growth temperate forest of China

Xugao Wang; Zhanqing Hao; Ji Ye; Jian Zhang; Buhang Li; Xiaolin Yao

Species richness and abundance are the two most important diversity variables. Species abundance is additive when aggregated across spatial scale, whereas species richness is non-additive. This study analyzes the effect of spatial scale and site on species abundance and richness in a 25-ha temperate forest plot in the Changbai Mountains, northeastern China. The result shows that species abundance and richness are not only dependent on spatial scales, but also dependent on site. Species abundance responds linearly to changes of spatial scale with no intersection in different sites of the study area. However, although species richness also increases with the increase of spatial scale, there are some intersections for the different sites, suggesting that a species-rich site does not always have a high value if the spatial scale is changed. In all, with respect to additive variables, it is relatively easy to extrapolate them from one spatial scale to another spatial scale, as they and the spatial scale usually form a linear relationship. In contrast, non-additive variables are difficult to extrapolate across spatial scales, because they often respond nonlinearly to spatial scale changes. In order to extrapolate these non-additive variables across spatial scales, it is necessary to estimate the relationships between them and spatial scales. As a result, extrapolation of information among spatial scales may be possible, but very difficult, especially for non-additive variables. Because the 25-ha Changbai plot is very small compared to the extent of the world temperate forests, and the vegetation is a relatively uniform type, more such studies in other ecosystems are needed before theories and generalization about scaling effects can be formulated.


Forest Ecology and Management | 2007

Vertical structure and spatial associations of dominant tree species in an old-growth temperate forest

Zhanqing Hao; Jian Zhang; Bo Song; Ji Ye; Buhang Li


Journal of Ecology | 2010

Species associations in an old-growth temperate forest in north-eastern China.

Xugao Wang; Thorsten Wiegand; Zhanqing Hao; Buhang Li; Ji Ye; Fei Lin


Oikos | 2009

Tree size distributions in an old-growth temperate forest

Xugao Wang; Zhanqing Hao; Jian Zhang; Juyu Lian; Buhang Li; Ji Ye; Xiaolin Yao


Oecologia | 2012

Effects of local biotic neighbors and habitat heterogeneity on tree and shrub seedling survival in an old-growth temperate forest

Xuejiao Bai; Simon A. Queenborough; Xugao Wang; Jian Zhang; Buhang Li; Zuoqiang Yuan; Dingliang Xing; Fei Lin; Ji Ye; Zhanqing Hao


Acta Oecologica-international Journal of Ecology | 2010

Spatial patterns and associations of six congeneric species in an old-growth temperate forest

Jian Zhang; Bo Song; Buhang Li; Ji Ye; Xugao Wang; Zhanqing Hao


Acta Oecologica-international Journal of Ecology | 2008

Spatial pattern of diversity in an old-growth temperate forest in Northeastern China

Xugao Wang; Zhanqing Hao; Ji Ye; Jian Zhang; Buhang Li; Xiaolin Yao


Basic and Applied Ecology | 2011

Scale specific determinants of tree diversity in an old growth temperate forest in China

Zuoqiang Yuan; Antonio Gazol; Xugao Wang; Fei Lin; Ji Ye; Xuejiao Bai; Buhang Li; Zhanqing Hao


Forest Ecology and Management | 2009

Fine-scale species co-occurrence patterns in an old-growth temperate forest

Jian Zhang; Zhanqing Hao; Bo Song; Buhang Li; Xugao Wang; Ji Ye

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Zhanqing Hao

Chinese Academy of Sciences

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Ji Ye

Chinese Academy of Sciences

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Xugao Wang

Chinese Academy of Sciences

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Jian Zhang

East China Normal University

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Fei Lin

Chinese Academy of Sciences

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Xiaolin Yao

Chinese Academy of Sciences

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Xuejiao Bai

Chinese Academy of Sciences

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Zuoqiang Yuan

Chinese Academy of Sciences

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Dingliang Xing

Chinese Academy of Sciences

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