Estimation of annual carbon budget of forest ecoxyxtems at meso-scale.

利用生态调查和卫星遥感数据估算了台地尺度森林生态系统的年碳收支。山外的陆地生态系统。选取地形不复杂、熔岩流植被类型多样的富士山作为中尺度碳收支估算的研究区，利用卫星遥感数据对5种森林生态系统进行了分类：松林、温带针叶林(柏木和铁杉)、温带落叶林、落叶松人工林、亚北极针叶林。对这5个森林生态系统中的3个生态系统的土壤呼吸(SR)进行了月度测量，并对一片松林的净初级生产力(NPP)进行了生态调查。森林生态系统的年碳收支由生态系统净生产量(NEP)估算：NEP=NPP-(SR-RR)。在参考其他生态学调查的基础上，假定森林生态系统的土壤呼吸(SR)中有4610是由根系呼吸贡献的。参考松林的生态NPP数据，通过卫星NDVI数据估算了台地尺度上每个生态系统的NPP。为了估算各生态系统在台地尺度上的SR，我们构建了SR与气候站月平均温度之间的函数关系1模型。结果表明，研究区(30877 Hm2)森林生态系统净第一性生产力总量为159t Cyr；研究区森林生态系统在台地尺度上的年总碳收支为11(10^3t Cyr；-1)

Annual carbon budget of forest ecosystems at mesa-scale was estimated using ecological investigation and satellite remote sensing data. Terrestrial ecosystems on the out skirts of Mt. Fuji which have no complex topography and have various vegetation types on lava flows, were selected to the research area of the meso-scale estimation of carbon budget., Five forest ecosystems were classified by satellite, remote sensing data : pine forests, temperate conifer forests (cypress and hemlock), temperate deciduous forests, larch plantations, subarctic conifer forests. Soil respiration (SR) of the three of these five forest ecosystems was monthly measured, and net primary production (NPP) of a pine forest was also measured using ecological investigation. Annual carbon budget of forest ecosystem was estimated by net ecosystem production (NEP) : NEP = NPP -(SR-RR). It was assumed that root respiration (RR) contributed 4610 of soil respiration (SR) in forest ecosystems referred to the other ecological investigations. NPP at each ecosystem at mesa-scale was estimated by satellite NDVI data referred to ecological NPP data in the pine forest. To estimate SR at each ecosystem at mesa-scale, we constructed the 1 model of SR as function of monthly mean temperature of climatological station. As a result, total NPP in forest ecosystems of the research area (30877 ha) was 159 (10^3 t C yr^<-1>), and total SR was 275 (10^3 t C yr^<-1>). Total annual carbon budget in forest ecosystems of the research area at mesa-scale was 11 (10^3 t C yr^<-1>)