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首页> 外文期刊>Ecological research >Carbon cycling and sequestration in a Japanese red pine [Pinus densiflora) forest on lava flow of Mt. Fuji
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Carbon cycling and sequestration in a Japanese red pine [Pinus densiflora) forest on lava flow of Mt. Fuji

机译：富士山熔岩流下日本红松（Pinus densiflora）森林的碳循环和固存。富士

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摘要

Biometnc-based carbon flux measurements were conducted in a pine forest on lava flow of Mt. Fuji, Japan, in order to estimate carbon cycling and sequestration. The forest consists mainly of Japanese red pine (Pinus densiflora) in a canopy layer and Japanese holly (Ilex pedunculosa) in a subtree layer. The lava remains exposed on the ground surface, and the soil on the lava flow is still immature with no mineral soil layer. The results showed that the net primary production (NPP) of the forest was 7.3 ± 0.7 t C ha~(-1) year~(-1), of which 1.4 ± 0.4 t C ha~(-1) year~(-1) was partitioned to biomass increment, 3.2 ± 0.5 t C ha~(-1) year~(-1) to above-ground fine litter production, 1.9 t C ha~(-1) year~(-1) to fine root production, and 0.8 ± 0.2 t C ha~(-1) year~(-1) to coarse woody debris. The total amount of annual soil surface CO_2 efflux was estimated as 6.1 ± 2.9 t C ha~(-1) year~(-1), using a closed chamber method. The estimated decomposition rate of soil organic matter, which subtracted annual root respiration from soil respiration, was 4.2 ± 3.1 t C ha~(-1) year~(-1). Biometric-based net ecosystem production (NEP) in the pine forest was estimated at 2.9 ± 3.2 t C ha~(-1) year~(-1), with high uncertainty due mainly to the model estimation error of annual soil respiration and root respiration. The sequestered carbon being allocated in roughly equal amounts to living biomass (1.4 t C ha~(-1) year~(-1)) and the non-living C pool (1.5 t C ha~(-1) year~(-1). Our estimate of biometric-based NEP was 25 % lower than the eddy covariance-based NEP in this pine forest, due partly to the underestimation of NPP and difficulty of estimation of soil and root respiration in the pine forest on lava flows that have large heterogeneity of soil depth. However, our results indicate that the mature pine forest acted as a significant carbon sink even when established on lava flow with low nutrient content in immature soils, and that sequestration strength, both in biomass and in soil organic matter, is large.
机译：基于生物金属的碳通量测量是在一片松树林中对山熔岩流进行的。日本富士，以估算碳循环和固存。森林主要由冠层的日本红松（Pinus densiflora）和次树层的日本冬青（Ilex pedunculosa）组成。熔岩仍暴露在地面上，熔岩流上的土壤仍未成熟，没有矿物土壤层。结果表明，森林净初级生产力（NPP）为7.3±0.7 t C ha〜（-1）年〜（-1），其中1.4±0.4 t C ha〜（-1）年〜（-） 1）分为生物量增量，3.2±0.5 t C ha〜（-1）年〜（-1）到地上细垫料生产，1.9 t C ha〜（-1）年〜（-1）到细根生，粗木屑为0.8±0.2 t C ha〜（-1）年〜（-1）。采用密闭室法估算的年土壤表面CO_2排放总量为6.1±2.9 t C ha〜（-1）年〜（-1）。从土壤呼吸中减去每年根系呼吸的土壤有机质分解速率估计为4.2±3.1 t C ha〜（-1）年〜（-1）。松树林中基于生物特征的净生态系统产量（NEP）估计为2.9±3.2 t C ha〜（-1）年〜（-1），具有较高的不确定性，这主要是由于年度土壤​​呼吸和根系的模型估计误差呼吸。固存碳的分配量大致等于活动生物量（1.4 t C ha〜（-1）年〜（-1））和非活性碳库（1.5 t C ha〜（-1）年〜（-） 1）。我们对该松林中基于生物特征的NEP的估算值比基于涡度协方差的NEP的估算值低25％，部分原因是对NPP的低估以及对熔岩流中松树林中土壤和根部呼吸的估算存在困难，土壤深度具有较大的非均质性，但是我们的结果表明，即使在未成熟土壤中低养分的熔岩流上建立成熟的松树林，以及在生物量和土壤有机质中的固存强度，其仍是重要的碳汇。 ，很大。

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  • 来源
    《Ecological research》 |2013年第5期|855-867|共13页
  • 作者

    Toshiyuki Ohtsuka; Masaya Negishi; Kazuyuki Sugita; Yasuo Iimura; Mitsuru Hirota;

  • 作者单位

    Institute for Basin Ecosystem Studies, Gifu University, 1-1 Yanagito, Gifu 501-1193, Japan;

    Laboratory of Ecology, Faculty of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan;

    Laboratory of Ecology, Faculty of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan;

    Institute for Basin Ecosystem Studies, Gifu University, 1-1 Yanagito, Gifu 501-1193, Japan;

    Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Ten-nodai, Tsukuba, Ibaraki 305-8572, Japan;

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