Population Structure and Spatial Pattern of Main Tree Species in Secondary Betula platyphylla Forest in Ziwuling Mountains, China

被引:64
作者
Kang, Di [1 ,2 ]
Guo, Yaoxin [4 ]
Ren, Chengjie [2 ,3 ]
Zhao, Fazhu [2 ,3 ]
Feng, Yongzhong [2 ,3 ]
Han, Xinhui [2 ,3 ]
Yang, Gaihe [2 ,3 ]
机构
[1] Northwest A&F Univ, Coll Forestry, Yangling 712100, Shaanxi, Peoples R China
[2] Res Ctr Recycle Agr Engn & Technol Shaanxi Prov, Yangling 712100, Shaanxi, Peoples R China
[3] Northwest A&F Univ, Coll Agron, Yangling 712100, Shaanxi, Peoples R China
[4] Northwestern Univ, Key Lab Resource Biol & Biotechnol Western China, Minist Educ, Xian 710069, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
DYNAMICS;
D O I
10.1038/srep06873
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
070301 [无机化学]; 070403 [天体物理学]; 070507 [自然资源与国土空间规划学]; 090105 [作物生产系统与生态工程];
摘要
This study investigated a typical secondary Betula platyphylla forest in the Ziwuling Mountains, Loess Plateau, China. In the sample plot, the DBH (diameter at breast height) class structure of B. platyphylla was bimodal. Individuals with small and large DBH values were abundant. The DBH structures of Quercus wutaishanica and Pinus tabulaeformis were close to that of the logistic model, thus suggesting the increasing population of these species. B. platyphylla and Populus davidiana showed random spatial distributions at almost all scales. However, Q. wutaishanica and P. tabulaeformis were significantly clumped at small scales. B. platyphylla had a negative spatial relation with Q. wutaishanica at small spatial scales. P. tabulaeformis and Q. wutaishanica showed negative spatial correlations at small scales, but they had positive correlations at large scales. These results suggest that P. tabulaeformis and Q. wutaishanica shared habitat preferences at these scales. In the future, the secondary B. platyphylla forest in the Ziwuling Mountains in the Loess Plateau will probably change into a multi-species mixed forest (Quercus-Pinus mixed forest). Assisted restoration strategies must be employed to improve the regeneration dynamics of the forest in the long term.
引用
收藏
页数:8
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