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Effects study of prescribed burning on community structure and species diversity of Pinus yunnanensis forest
Author: Ql Shuwei CHEN Qibo YANG Bo YANG Jianguang LI Jianqiang HUANG Xinhui Time: 2023-07-10 Counts:

doi:10.16186/j.cnki.1673-9787.2021100032

Received:2021/10/14

Revised:2021/11/17

Published:2022/07/15

Effects study of prescribed burning on community structure and species diversity of Pinus yunnanensis forest

QI Shuwei1, CHEN Qibo1, YANG Bo1, YANG Jianguang2, LI Jianqiang1, HUANG Xinhui1

1.School of Ecology and EnvironmentSouthwest Forestry UniversityKunming 650224YunnanChina;2.Xinping County Forestry and Grassland BureauYuxi  653400YunnanChina

Abstract: In order to seveal the impact of prescribed burning on the community structure and species diversity of Pinus yunnanensis forests, taking the Pinus yunnanensis forest restored for one year after prescribed burning for 20 years in Zhaobi mountain in Xinping CountyYunnan Province as the study object, four sample plots of 20 m ×20 m were set up in the prescribed and unprescribed burning areas to conduct sample surveys, analysis and comparison changes in the community structure and species diversity of Pinus yunnanensis forests after one year of prescribed burning and restoration. The results showed that:(1) The species composition of Pinus yunnanensis plantation was changed from 8 species to 4 species in the arbor layer, 22 species to 11 species in the shrub layer, and 36 species in the herb layer dropped to 27 species.(2) There was no significant difference in average tree height ( p value of 0. 12) average diameter at breast height (p value of 0.33) and average under branch height ( p value of 0.27 ) of Pinus yunnanensis before and after prescribed burning.(3)Prescribed burning had little effect on the species richness of Pinus yunnanensis plantations. Among them, Pinus yunnanensis had Shannon-Wiener index (p value of 0.06), Simpson diversity index ( p value of 0.06), the species richness of the layer (p value of 0.14) and the herb layer ( p value of 0.68) no significant differences. Only the species richness of the shrub layer (p value of 0.002) significantly decreased. Therefore, after the prescribed burning, the species composition of Pinus yunnanensis forests declined, and the species diversity of the shrub layer extremely significantly declined, but it had no significant impact on the growth of Pinus yunnanensis. Therefore , it could be used as a method for fire prevention and management of Pinus yunnanensis forests.

Key words:prescribed burning;Pinus yunnanensis; community structure;species diversity;

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