摘要
【目的】检测长白山施业区植被的变化趋势,分析植被动态变化及其稳定性,以期更加全面地揭示天然林资源保护工程对于长白山植被恢复的影响力度,为该区的植被恢复、生态环境保护提供了科学的参考依据与关键的数据支持。【方法】以长白山西北坡的泉阳林业局为研究区,利用谷歌地球引擎(GEE)平台,选取1993—2023年间Landsat系列卫星提供的地表反射率数据,经过预处理和校正后,计算并分析了长白山施业区森林植被覆盖度(FVC)的时空动态变化。将土地利用覆盖类型通过高精度的地表覆盖分类数据集(GLC_FCS30),获得1995年、2000年、2010年和2020年4个时期的土地覆盖数据,并根据现实情况要求划分为常绿针叶林、落叶针叶林、落叶阔叶林、针阔混交林、耕地、草地、建筑用地、湿地和水体。结合Theil-Sen趋势分析和Mann-Kendall检验,应用LandTrendr方法,基于归一化燃烧率构建时间序列数据,检测森林植被近30年来受到的干扰情况,并详细分析了FVC的变化趋势。【结果】1)土地利用类型以落叶阔叶林为主,林地总面积逐年上升,耕地面积明显缩减。2)1993—2023年研究区FVC受到严重破坏后又恢复至高植被覆盖水平,但其森林生态系统仍不稳定。空间上整体呈“西高东低,北高南低”的分布趋势。3)研究区年干扰面积逐年下降,主要发生在中部地区,2014年出现的干扰峰值是修建了鹤大高速。【结论】长白山施业区在天然林资源保护工程的影响下,森林覆盖得到了有效恢复,干扰程度显著降低。
【Objective】To detect the trend of vegetation change in Changbai mountain,analyze the dynamic changes in vegetation and its stability,and reveal the impact of the natural forest resource protection project on vegetation restoration in Changbai mountain.This study aims to provide scientific reference and key data support for vegetation restoration and ecological environment protection in the area.【Method】The Quanyang Forestry Bureau on the northwest slope of Changbai mountain was taken as the research area.Surface reflectance data provided by Landsat series satellites from 1993 to 2023 were selected using the Google Earth Engine(GEE)platform.After preprocessing and correction,the spatial-temporal dynamic changes of forest vegetation coverage(FVC)in the operational area of Changbai mountain were calculated and analyzed.Using the high-precision land cover classification dataset(GLC_FCS30),land cover data for 1995,2000,2010,and 2020 were obtained.Based on the actual conditions,land cover types were divided into evergreen coniferous forest,deciduous coniferous forest,deciduous broadleaf forest,mixed forest,cultivated land,grassland,built-up land,wetland,and water bodies.Combined with Theil-Sen trend analysis and the Mann-Kendall test,the LandTrendr method was used to construct time series data based on the normalized burning rate to detect disturbances in forest vegetation over the past 30 years,and the trend of FVC changes was analyzed in detail.【Result】1)The dominant land use type is deciduous broadleaf forest,and the total area of forest land,wetland,and water increased year by year,while the area of cultivated land significantly decreased.2)From 1993 to 2023,FVC in the study area recovered to a high vegetation cover level after being seriously damaged,but the forest ecosystem remained unstable.The overall spatial distribution trend is“high in the west and low in the east,high in the north and low in the south”.3)The annual disturbance area in the study area decreased year by year,mainly in the central region.The disturbance peak in 2014 was caused by the construction of the Heda expressway.【Conclusion】Under the influence of the natural forest resource protection project,forest coverage has been effectively restored and the degree of disturbance has been significantly reduced.
作者
邓卓尔
刘琪璟
DENG Zhuo’er;LIU Qijing(College of Forestry,Beijing Forestry University,Beijing 100083,China;Key Laboratory of Forest cultivation and conservation of Ministry of Education,Beijing Forestry University,Beijing 100083,China)
出处
《中南林业科技大学学报》
北大核心
2025年第11期127-137,共11页
Journal of Central South University of Forestry & Technology
基金
国家科技基础资源调查项目(2019FY101602)。
