Effects of topographic factors on tree species diversity in subtropical coniferous and broad-leaved mixed forests

doi:10.12302/j.issn.1000-2006.202104023

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2022, Vol. 46 ›› Issue (4): 153-161.doi: 10.12302/j.issn.1000-2006.202104023

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Effects of topographic factors on tree species diversity in subtropical coniferous and broad-leaved mixed forests

ZHU Jindi(), WEI Xinliang(), YANG Jingjing, ZHANG Jiyan

College of Environment and Resources, State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou 311300, China

Received:2021-04-15 Revised:2021-10-02 Online:2022-07-30 Published:2022-08-01
Contact: WEI Xinliang E-mail:jindi_zhu@qq.com;weixl@zafu.edu.cn

Abstract

Abstract:

【Objective】 The coniferous and broad-leaved mixed forest is the main forest type in subtropical areas. Revealing the influence of topographic factors on tree species diversity is the technical basis of the sustainable forest management. 【Method】 Based on data from national forest inventory (NFI) sample plots in Zhejiang Province, China, the tree species composition diversity index (I_SCD), the Margalef index, Simpson index, Shannon-Wiener index, Alatalo index and Pielou index were used as tree species diversity indicators. The influence of topographic factors on tree species diversity was elucidated by analyzing variation patterns for each diversity index across different gradients of four topographic factors, namely elevation, slope, slope direction and slope position. 【Result】 The I_SCD, Simpson index, Shannon-Wiener index and Pielou index were significantly different between the elevation gradients. The I_SCD, Simpson index and Shannon-Wiener index were significantly different between the slope gradients. The tree species diversity index values were not significantly different between slope orientations, and the Margalef index and Alatalo index significantly differed between slopes. 【Conclusion】 The subtropical coniferous and broad-leaved mixed forests had a high diversity level. The elevation and slope had significant combined effects on tree species diversity, and had little effect on the number of tree species and distribution uniformity. The slope direction had no significant effect on the number of tree species, distribution uniformity and their combined ifluences of the coniferous and broad-leaved mixed forests. The slope position influenced the number and distribution uniformity of tree species distribution, and had no obvious effect on tree species diversity.

Key words: coniferous and broad-leaved mixed forest, tree species diversity, topographic factor, divergence, subtropical area

CLC Number:

S718

ZHU Jindi, WEI Xinliang, YANG Jingjing, ZHANG Jiyan. Effects of topographic factors on tree species diversity in subtropical coniferous and broad-leaved mixed forests[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2022, 46(4): 153-161.

Figures/Tables 3

References 55

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等级 grade	分级标准 classificationcriteria
等级 grade	海拔/m elevation	坡度 /(°) slope	坡向 aspect	坡位 slope position
Ⅰ	0~200	5~14(缓坡)	北坡:338°~22°	脊部
Ⅱ	≥200~400	15~24(斜坡)	东北坡:23°~67°	上坡
Ⅲ	≥400~600	25~34(陡坡)	东坡:68°~112°	中坡
Ⅳ	≥600~800	35~44(急坡)	东南坡:113°~157°	下坡
Ⅴ	≥800~1000	≥45(险坡)	南坡:158°~202°
Ⅵ	≥1000		西南坡:203°~247°
Ⅶ			西坡:248°~292°
Ⅷ			西北坡:293°~337°

Effects of topographic factors on tree species diversity in subtropical coniferous and broad-leaved mixed forests

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