植物生态学报 ›› 2025, Vol. 49 ›› Issue (6): 939-951.DOI: 10.17521/cjpe.2023.0325  cstr: 32100.14.cjpe.2023.0325

• 研究论文 • 上一篇    下一篇

北京不同林龄人工林生物量空间格局及其影响因素

刘新月1, 王立平2, 刘春和2, 孙艳丽3, 刘鹏1, 田赟1, 贾昕1, 查天山1,*(), 钱多4   

  1. 1北京林业大学水土保持学院, 北京林业大学水土保持国家林业和草原局重点实验室, 北京 100083
    2北京市八达岭林场管理处, 北京 102112
    3北京市园林绿化规划和资源监测中心, 北京 100193
    4北京农业职业学院, 北京 102442
  • 收稿日期:2023-11-07 接受日期:2024-05-06 出版日期:2025-06-20 发布日期:2024-05-07
  • 通讯作者: *查天山(tianshanzha@bjfu.edu.cn)
  • 基金资助:
    中央高校基本科研业务费专项资金(2021ZY49)

Spatial pattern of biomass and its influencing factors for plantations with different stand ages in Beijing

LIU Xin-Yue1, WANG Li-Ping2, LIU Chun-He2, SUN Yan-Li3, LIU Peng1, TIAN Yun1, JIA Xin1, ZHA Tian-Shan1,*(), QIAN Duo4   

  1. 1School of Soil and Water Conservation, Key Laboratory of National Forestry and Grassland Administration on Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
    2Beijing Badaling Forest Farm, Beijing 102112, China
    3Planning and Monitoring Center of Beijing Forestry and Landscape, Beijing 100193, China
    4Beijing Vocational College of Agriculture, Beijing 102442, China
  • Received:2023-11-07 Accepted:2024-05-06 Online:2025-06-20 Published:2024-05-07
  • Contact: *ZHA Tian-Shan(tianshanzha@bjfu.edu.cn)
  • Supported by:
    Supported by the Fundamental Research Funds for the Central Universities(2021ZY49)

摘要:

为揭示城市人工林生物量空间变化及其空间异质性的驱动因子, 阐明不同驱动因子对生物量空间分异影响的适宜范围。以北京市不同林龄人工林为研究对象, 基于森林清查数据, 利用转换因子连续函数法得到小班尺度人工林生物量; 选取气候(气温、降水量、日照时数)、植被(归一化植被指数, NDVI)、地形(高程、坡度、坡向)和人为(夜间灯光指数、国内生产总值、人口密度)因子, 运用线性回归分析、多项式拟合等方法分析生物量对各影响因子的响应; 利用随机森林预测不同林龄生物量的空间分布, 基于地理探测器量化各因子及其交互作用对生物量空间异质性的解释力度, 确定各因子对生物量影响的适宜范围。主要结果: (1)生物量随林龄的增加而增大, 幼龄林、中龄林、近熟林、成熟林和过熟林生物量分别为35.22、75.42、88.71、96.17和148.59 Mg·hm-2。(2)相较于地形因子, 气候因子、植被因子和人为因子对生物量的影响更大。幼龄林生物量对各因子的响应与其他林龄存在差别, 可能与幼龄林存在较多的抚育有关。(3)对生物量空间异质性解释最强的因子分别为夜间灯光指数(52.91%)、日照时数(51.28%)和降水量(45.75%)。(4)影响因子之间的交互作用均为非线性增强或双因子增强, 林龄自身对生物量空间异质性的影响较小, 但其与降水量、夜间灯光指数、国内生产总值和人口密度交互后解释力度达到70%以上。(5)气温在12.3-13.0 ℃、降水量在526.8-542.6 mm、日照时数在2 543.1-2 602.8 h、NDVI在0.46-0.59范围内, 中度人为干扰的平坡上具有较高的生物量。因此, 生物量的空间分异是由多种因子共同作用的, 想要获取更高的生物量需要综合考虑研究区的特点。结果有助于更好地理解人工林生物量与影响因子之间的关系, 为后续造林工程的实施和人工林抚育等提供科学合理的理论依据。

关键词: 人工林, 生物量, 空间格局, 地理探测器, 城市森林

Abstract:

Aims Elucidating the spatial pattern of biomass and its influencing factors is crucial for the management of plantations, yet such study in urban forests with different stand ages is lacking.

Methods We collected the inventory data of forests in Beijing and used the method of biomass expansion factor to estimate plantation biomass with different stand ages. Linear regression and polynomial fitting method were used to identify the factors that affect on the biomass of plantations. The spatial patterns of biomass were simulated by the way of random forest. Finally, the spatial correlations of biomass with the factors of climate, vegetation, and topography as well as the anthropogenic effects in different age stands were conducted by the technique of Geodetector.

Important findings The results showed that the biomass increased with increasing stand ages, from 35.22 Mg·hm-2 for young stand increased to 148.59 Mg·hm-2 for over-mature forests. The climatic, vegetation, and anthropogenic factors had greater influence on biomass compared to topographical factors. In addition, the factors that influenced young forest biomass differed from the stands with other ages, due to its frequently management. Moreover, contrasting with other factors, the nighttime lights, sunshine duration and precipitation were likely to be important factors influencing the spatial pattern of biomass, with explaining power of 52.91%, 51.28% and 45.75%, respectively. Furthermore, there was also a strong interaction among these factors on spatial pattern of biomass in these urban forests, with over 70% of explaining power induced by the interactive of precipitation, nighttime lights, gross domestic product and population density. In present study, higher biomass was associated within the ranges of 12.3-13.0 °C in temperature, 526.8-542.6 mm in precipitation, 2 543.1-2 602.8 h in sunshine duration, and 0.46-0.59 in vegetation index of normalized difference vegetation index (NDVI). Our study highlights that the spatial pattern of biomass in urban forests was influenced by multiple factors. Identifying such influences is an important matter for better management of urban forests in practice.

Key words: plantation, biomass, spatial pattern, Geodetector, urban forests