中国森林凋落量时空分布特征

发布时间：2018-06-08 00:05

本文选题：森林凋落量 + 地统计　；参考：《应用生态学报》2017年08期

【摘要】：通过构建全国尺度上森林叶凋落量和总凋落量与年平均温度、年平均降雨量和实际蒸散量的关系模型,应用地统计学分析方法,并结合遥感解译的森林覆盖信息,分析2001、2006和2012年中国森林叶凋落量和总凋落量的空间分布及其变异格局.结果表明:与年平均温度和降雨量相比,区域尺度上实际蒸散量对森林叶凋落量和总凋落量有更好的解释预测关系;分布于中南地区的常绿阔叶林的年凋落量最高,为636.2 g·m~(-2),分布于东北地区的温带落叶阔叶林的年凋落量范围为339~385 g·m~(-2),其中,森林叶凋落量约占总凋落量的70%.2001、2006和2012年,全国森林凋落总量分别为801、865和1032 Tg,呈明显增长趋势,而基于遥感图像解译的森林年覆盖率分别为18%、20%和24%,呈增长趋势.我国人工林面积的迅速增加和林分生长,极大影响了森林凋落物量及其动态变化,进而对森林生态系统物质循环产生重要影响.
[Abstract]:Based on the model of relationship between forest leaf litter amount, total litter amount and annual average temperature, annual average rainfall and actual evapotranspiration on the national scale, the geostatistical analysis method was applied and the forest cover information was interpreted by remote sensing. The spatial distribution and variation pattern of leaf litter and total leaf litter in China in 2006 and 2012 were analyzed. The results showed that the actual evapotranspiration in regional scale had a better relation with the annual mean temperature and rainfall, and the annual litterfall of evergreen broadleaved forest was the highest in the south of central China. The annual litter amount of temperate deciduous broad-leaved forest in Northeast China is 339 ~ 385g / m ~ (-1) ~ (-2) ~ (-1). The forest leaf litter is about 70.2001C / 2006 and 1032 Tg / 12, respectively, which shows an obvious increasing trend, and the annual litter amount of the temperate deciduous broad-leaved forest in Northeast China is 801865 and 1032 Tg, respectively, in the range of 636.2 g / m ~ (-1) ~ (-1) ~ (-1) ~ (-2) ~ (-1). The annual forest coverage rate based on remote sensing image interpretation was 18% and 24%, respectively, showing an increasing trend. The rapid increase of plantation area and the growth of forest have greatly affected the amount of forest litter and its dynamic changes, and then have an important impact on the material cycle of forest ecosystem.
【作者单位】：上海交通大学农业与生物学院/低碳农业研究中心;农业部都市农业(南方)重点实验室;国家林业局上海城市森林生态系统国家定位观测研究站;
【基金】：中国科学院战略性先导科技专项(XDA0505020) 国家自然科学基金项目(71333010) 上海交通大学农工交叉项目(Agri-X2015004)资助~~
【分类号】：S714

【相似文献】