树种组成和径级结构对热带次生林生物量恢复影响的研究

王璐颖; 周璋; 张涛; 林明献; 张春生; 李意德; 陈德祥

doi:10.11913/PSJ.2095-0837.2022.20169

树种组成和径级结构对热带次生林生物量恢复影响的研究

王璐颖^1,2,
周璋^1,3,4,
张涛³,
林明献³,
张春生^1,4, ,,
李意德^1,4,
陈德祥^1,3,4, ,

1. 中国林业科学研究院热带林业研究所, 海南尖峰岭森林生态系统国家野外科学观测研究站, 广州 510520;
2. 南京林业大学, 南京 210037;
3. 中国林业科学研究院热带林业研究所试验站, 海南乐东 572542;
4. 国家林业和草原局森林碳汇研究与实验中心, 海南三亚 527000

基金项目:

国家自然科学基金（41773071，41171040）；国家林业局“尖峰岭生态定位站运行补助”计划（2020132002）；科技部“海南尖峰岭森林生态系统重点野外科学观测研究站运行费”。

详细信息

作者简介:
王璐颖(1997-),女,硕士研究生,研究方向为森林生态学(E-mail:398637237@qq.com)。

通讯作者:
张春生,E-mail:bdhzcs@163.com

陈德祥,E-mail:dchen@caf.ac.cn

中图分类号: S758
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出版历程
- 收稿日期: 2021-07-25
- 修回日期: 2022-01-12
- 网络出版日期: 2022-10-31
- 发布日期: 2022-04-27

Effects of tree species composition and diameter class structure on biomass restoration of secondary tropical forest

1. Research Institute of Tropical Forestry, Chinese Academy of Forestry, Jianfengling Long￣Term Research Station for Tropical Forest Ecosystem, Guangzhou 510520, China;
2. Nanjing Forestry University, Nanjing 210037, China;
3. Experimental Station of Research Institute of Tropical Forestry Chinese Academy of Forestry, Ledong, Hainan 572542, China;
4. Forest Carbon Sequestration Research and Experimental Center of the State Forestry and Grassland Administration, Sanya, Hainan 527000, China

Funds:

This work was supported by grants from the National Natural Science Foundation of China (41773071, 41171040), State Forestry Administration "Jianfengling Ecological Positioning Station Operation Subsidy" (2020132002), and Ministry of Science and Technology "Hainan Jianfengling Forest Ecosystem Key Field Scientific Observation and Research Station Operation Fee".

摘要

摘要: 本研究在海南尖峰岭和吊罗山热带林区海拔245～1255 m范围内根据林分恢复时间设立固定监测样地，探讨了森林地上生物量与树种组成和径级结构的关系。结果显示：海南热带次生林平均地上生物量为（155.38 ± 37.16）×10³ kg/hm²，其中低地次生雨林为（137.91 ± 31.02）×10³ kg/hm²，山地次生雨林为（160.39 ± 42.13）×10³ kg/hm²。自然恢复状态下的生物量恢复率与恢复时间呈显著正相关关系，但难以在短时间内恢复至原始林水平。生物量恢复受树种组成和径级结构的显著影响，大径级林木生物量占比随恢复时间显著增加，小径级林木生物量占比随恢复时间显著降低。恢复26年的山地次生雨林小径级林木生物量占比高出原始林58%，大径级林木生物量占比则低68%；恢复35年的低地雨林次生林小径级林木生物量占比比原始林高30%，大径级林木生物量占比则低20%；随恢复时间增加，速生树种的种类和数量逐渐减少，生物量占比下降7%左右；而慢生树种则均呈增加趋势，生物量增长20%～ 32%。本研究结果对热带森林的有效保护与科学恢复、提高森林碳汇能力等具有重要的指导意义。
- 次生林 /
- 演替 /
- 生物量恢复 /
- 生长策略 /
- 径级
Abstract: In this study, 32 permanent plots with different recovery times were set up in Jianfengling and Diaoluoshan areas of Hainan Island within an elevational range of 245-1255 m above sea level in order to analyze the relationship between aboveground biomass and forest tree species composition and diameter at breast height (DBH) class. Results showed that the average aboveground biomass (AGB) of the pan-tropical forest was (155.38 ± 37.16) ×10³ kg/hm², while biomasses of the secondary forest of the lowland and montane rainforests were (137.91 ± 31.02) ×10³ and (160.39 ± 42.13) ×10³ kg/hm², respectively. The biomass recovery rate and natural recovery time showed a significant positive correlation through binomial fitting, with more than 70 years required to restore 95% of AGB of the primary forest. In the process of community succession, the species composition and stand structure were constantly changing. The biomass proportion of the large-diameter tree class increased significantly with recovery time, whereas small-diameter trees decreased significantly with recovery time. The biomass ratio of the large-diameter tree class in the early recovery stage accounted for less than 10% of secondary forest, but increased to 20% in the middle recovery period, and reached 70% in primary forest. With ongoing recovery, the biomass ratio of fast-growing tree species in the community decreased by more than 10%,while the ratio of slow-growing tree species in the primary forest increased by 20%-32%. Thus, the AGB recovery rate in tropical secondary forests increased significantly with the increase in recovery time. The composition dynamics of large-diameter trees and slow-growing species during the recovery process are important drivers of forest biomass recovery. The results should help improve our understanding of the dynamic changes in AGB during tropical secondary forest recovery.
- Secondary forest /
- Succession /
- Biomass resilience /
- Growth strategy /
- Diameter at breast height class

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