| 本文已被：浏览 9次 下载 0次 |
|
| 广西大瑶山天然阔叶林植被碳储量变化及影响因素 |
|
谭必增1, 柳雄辉1, 蔡会德1, 卢 峰1, 蒙 检1, 唐秋月1, 覃 琨2, 徐占勇1, 覃志伟1, 罗蔚生1
|
|
|
| (1.广西壮族自治区森林资源与生态环境监测中心;2.广西大瑶山森林生态系统定位观测研究站) |
|
| 摘要: |
| 探究天然阔叶林植被碳储量变化特征及影响因素，可为天然林保护及其碳汇监测与生态系统服务提升等提供实践基础和理论支持。本研究以广西大瑶山南亚热带与中亚热带过渡带的19个天然阔叶林为对象，基于2005、2010、2015年3期该区域森林资源连续清查数据，利用一元生物量模型结合含碳率计算了植被碳储量及其变化情况，探讨了其在不同林分密度、立木类型和径级间的分配特征，并结合相关性分析和随机森林模型，研究林分与环境因子对碳储量的影响。研究结果表明：（1）2005、2010、2015年植被碳储量分别为66.31±40.12 t/hm2、67.61±37.77 t/hm2、76.87±38.49 t/hm2，2005-2010年和2010-2015年植被碳储量分别增加1.30±11.30 t/hm2和9.25±6.53 t/hm2，后者显著高于前者。（2）中密度和高密度林分、保留木（贡献95%以上碳储量）、中径级（碳储量占比近60%）是植被碳储量主要贡献者。（3）随机森林模型表明，株数、郁闭度是影响碳储量的关键因素，呈现显著正相关（p<0.01）；气候因子（温度、降雨量）呈显著正相关（p<0.05），地形因子（海拔、坡度）则呈显著性负相关（p<0.05），土壤性质对碳储量变化也有显著影响（p<0.05）。研究结果评估了大瑶山天然阔叶林碳储量的分配特征和变化情况，明确了影响因子，为广西天然林管理与保护提供了科学依据。 |
| 关键词: 广西大瑶山 天然阔叶林 植被碳储量 碳储量变化 影响因素 |
| DOI： |
| 投稿时间：2025-06-04修订日期：2025-06-27 |
| 基金项目:广西自筹经费林业科技项目(桂科2022ZC第10号)；广西自筹经费林业科技项目（2023GXZCLK67） |
|
| Change of Carbon Storage and Influencing Factors of Natural Broadleaf Forests in Guangxi Dayaoshan |
|
TAN Bizeng1, LIU Xionghui1, CAI Huidi1, LU Feng1, MENG Jian1, TANG Qiuyue1, QIN Kun2, XU Zhanxiong1, QIN Zhiwei1, LUO Weisheng1
|
| (1.Guangxi Forest Resources and Environment Monitoring Center,Nanning,Guangxi;2.Guangxi Dayaoshan Forest Ecosystem Observation and Research Station,Laibin,Guangxi) |
| Abstract: |
| Investigating the characteristics and influencing factors of vegetation carbon storage change in natural broadleaf forests can provide practical basis and theoretical support for the protection of natural forests, as well as for the monitoring of carbon sinks and the improvement of ecosystem services. This study takes 19 natural broadleaf forests in the transitional zone between the South Subtropical and Middle Subtropical regions in Guangxi Dayaoshan as the research objects. Based on the continuous forest resource inventory data from 2005, 2010, and 2015 in this area, the vegetation carbon storage and its change were calculated using a univariate biomass model combined with carbon content rates. The allocation characteristics of carbon storage among different stand densities, tree types, and diameter classes were explored. Additionally, the impact of stand and environmental factors on carbon storage was studied using correlation analysis and the random forest model. The results show that: (1) The vegetation carbon storage in 2005, 2010, and 2015 was 66.31±40.12 t/hm2, 67.61±37.77 t/hm2, and 76.87±38.49 t/hm2, respectively. The increase in vegetation carbon storage from 2005 to 2010 and from 2010 to 2015 was 1.30±11.30 t/hm2 and 9.25±6.53 t/hm2, respectively, with the latter being significantly higher than the former. (2) Medium-density and high-density stands, retention trees (contributing over 95% of carbon storage), and medium-diameter trees (accounting for nearly 60% of carbon storage) are the main contributors to vegetation carbon storage. (3) The random forest model indicated that the number of trees and canopy cover are key factors affecting carbon storage, showing a significant positive correlation (p<0.01). Climatic factors (temperature and precipitation) also showed a significant positive correlation (p<0.05), while topographic factors (elevation and slope) exhibited a significant negative correlation (p<0.05). Soil properties also had a significant impact on carbon storage change (p<0.05). The results of this study evaluated the allocation characteristics and changes in carbon storage of the natural broadleaf forests in Guangxi Dayaoshan and identified the influencing factors, providing a scientific basis for the management and protection of natural forests in Guangxi. |
| Key words: Guangxi Dayaoshan Natural broadleaf forests Vegetation carbon storage Change of carbon storage Influencing factors |
