| 广西森林生态系统质量评价与影响因素研究 |
| A Study on the Evaluation of Forest Ecosystem Quality and Its Influencing Factors in Guangxi |
| 投稿时间：2025-01-25 修订日期：2025-11-22 |
| DOI：10.19316/j.issn.1002-6002.2026.02.14 |
| 中文关键词: 森林生态系统 森林类型 质量评价 随机森林模型 |
| 英文关键词:forest ecosystem forest type quality evaluation random forest model |
| 基金项目:国家自然科学基金国际(地区)合作与交流项目(42361144885) |
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| 中文摘要: |
| 广西森林是我国南方重要集体林区、重要生态安全屏障,是央地共建的首个现代林业产业示范区,评价与监测森林生态系统质量,可为森林高质量发展与生态文明价值实现提供理论支持。基于2022年广西147个森林样地监测数据,从森林生态系统的森林生产力、森林结构和生态胁迫3个层面选取8项评价指标,使用层次分析法对评价指标赋权,加权求和计算各森林生态系统样地质量指数得分,并利用随机森林模型法分析其影响因素。结果表明:①2022年广西森林生态系统质量指数为70.99,属于良好等级。147个样地生态质量均为良或优,森林生态系统质量整体呈现由东南向西北逐渐降低的分布趋势。②从不同森林类型来看,针阔混交林生态系统质量指数最高(72.03),其次为常绿落叶阔叶混交林(71.62)、常绿阔叶林(70.86)、亚热带针叶林(70.60)、竹林(70.25)和人工林(68.55),山地灌丛生态系统质量指数最低(65.73)。③降水对广西森林生态系统质量指数的影响最强(0.263),其次为常住人口(0.157)、土壤黏粒质量分数(0.148)和土壤有机碳质量分数(0.103),气温、地形因子(坡向、海拔和坡度)和土壤pH的影响均小于0.1。该文提出的森林生态系统质量评价指标体系及研究结论可为区域森林生态系统质量监测及评价工作的开展提供重要理论参考。 |
| 英文摘要: |
| The forests of Guangxi represent a significant collective forest area and a vital ecological security barrier in southern China.It is the first modern forestry industry demonstration zone jointly built by the central and local governments.Evaluating and monitoring forest ecosystem quality can provide theoretical support for the high-quality development of forests and the realization of ecological civilization value.Based on monitoring data from 147 forest plots in Guangxi in 2022,eight evaluation indicators were selected across three dimensions of forest productivity,forest structure and ecological stress of forest ecosystem.The analytic hierarchy process was used to assign weights to the indicators,and a weighted summation method was applied to calculate the quality index scores for each forest ecosystem sample plot.The random forest model was used to analyze the influencing factors.The results showed that:①The comprehensive index of forest ecosystem quality in Guangxi in 2022 was 70.99,which falls into the "good" category.All 147 plots were rated as either good or excellent in ecological quality,with the overall forest ecosystem quality showing a gradual decline from the southeast to the northwest.②Among different forest types,coniferous and broad-leaved mixed forests had the highest ecosystem quality index (72.03),followed by evergreen and deciduous broad-leaved mixed forests (71.62),evergreen broad-leaved forests (70.86),subtropical coniferous forests (70.60),bamboo forests (70.25) and artificial forests (68.55).Mountain shrublands had the lowest ecosystem quality index (65.73).③Precipitation had the strongest influence on the forest ecosystem quality index in Guangxi (0.263),followed by resident population (0.157, soil clay content (0.148) and soil organic carbon storage (0.103).The influences of temperature,topographic factors (slope aspect,altitude and slope gradient) and soil pH were all below 0.1.The evaluation index system and research conclusions of forest ecosystem quality proposed in this paper can provide an important theoretical reference for the monitoring and evaluation of regional forest ecosystem quality. |
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