文献类型： 外文期刊

作者： Kang Di ¹ ; Deng Jian ² ; Qin Xiaowei ⁴ ; Hao Fei ⁵ ; Guo Shujuan ² ; Han Xinhui ² ; Yang Gaihe ² ;

作者机构： 1.Northwest A&F Univ, Coll Forestry, Yangling 712100, Peoples R China

2.Res Ctr Recycle Agr Engn & Technol Shaanxi Prov, Yangling 712100, Peoples R China

3.Northwest A&F Univ, Coll Agron, Yangling 712100, Peoples R China

4.Chinese Acad Trop Agr Sci, Spice & Beverage Inst Res, Wanning 730070, Peoples R China

5.Yunnan Baiyao Grp CO LTD, Kunming 650500, Peoples R China

关键词： arid and semi-arid region;forest regeneration;competition;spatial pattern;oak forests

期刊名称：JOURNAL OF ARID LAND （ 影响因子：2.299； 五年影响因子：2.459 ）

ISSN： 1674-6767

年卷期： 2017 年 9 卷 1 期

页码：

收录情况： SCI

摘要： Reforestation or natural forest regeneration is an alternative measure for controlling soil erosion in degraded land on the Chinese Loess Plateau (CLP). However, our understanding of the temporal dynamics and the spatial patterns of forest regeneration remains inadequate. Two oak forests at different development stages were investigated to determine the spatial patterns of competitions (intraspecies and interspecies) during different successional stages. The intraspecies and interspecies spatial relationships among different tree diameters at breast height were analyzed at multiple scales by Kriging interpolation method and univariate and bivariate O-ring statistics. Our analytical results indicated that self-correlation and competition intensity were relatively high between oak and pine trees in the early development stage of oak forests due to their clumped distributions of heavy seeds. Birch trees had a lower competition in comparison to oak trees although birch was the dominant species. Therefore, asymmetric competition of oak trees was most likely to have led to their edge dispersal and their success in replacing the pioneer species. Asymmetric competition means that larger individuals obtained a disproportionately large share of the resources and suppressed the growth of smaller individuals. Kriging interpolation analysis showed a tendency towards homogenization caused by interspecies competition during the succession of oak forests. Our results demonstrated that the competition was the driving factor in the spatial distribution of oak forests on the CLP.