Methane flux of leaves in a tropical rainforest and a temperate conifer forest
Methane flux of leaves in a tropical rainforest and a temperate conifer forest
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DOI：
10.2480/agrmet.68.1.3
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发表时间：
2012-03-01
影响因子：
1.3
通讯作者：
Itoh, Masayuki
中科院分区：
文献类型：
--
作者：
Kamakura, Mai;Kosugi, Yoshiko;Itoh, Masayuki
采用密闭静态箱法测定了热带雨林和温带针叶林叶片的甲烷（CH 4）通量。叶片样品选自马来西亚半岛帕索森林保护区的热带雨林和日本中部吉柳实验流域（基尤）的温带森林的树冠和森林地面。在Pasoh，我们从树冠（Xanthophyllum stipitatum，Dipterocarpus sublamellatus，Ptychopyxis caput-medusae，Neobalanocarpus heimii）和四个物种从森林地面（Alphonsea maingayi，Rinorea an-guifera，Macaranga Neobalanocarpus heimii）取样。在森林保护区附近的油棕种植园也对油棕的叶子进行了取样。在基尤，我们采样了Chamaaparis obtusa的叶子，从树冠的顶部（18 m）和中部（16 m）以及在森林地面的日本叶。孵化实验表明，CH 4排放的测试物种在两个站点采样的叶子，虽然CH 4通量显示每天的基础上变化。这些结果表明，树叶在Pasoh和基尤可能作为一个小的CH 4源，但他们的贡献是非常小的总森林生态系统的CH 4交换相比，土壤CH 4通量。
We measured methane (CH4) fluxes of leaves growing in a tropical rainforest and a temperate conifer forest using the closed static chamber method. Leaf samples were chosen from the canopy and forest floor of a tropical rainforest at Pasoh Forest Reserve, Peninsular Malaysia and a temperate forest at Kiryu Experimental Watershed (KEW), central Japan. At Pasoh, we sampled four species from the canopy (Xanthophyllum stipitatum, Dipterocarpus sublamellatus, Ptychopyxis caput-medusae, Neobalanocarpus heimii) and four species from the forest floor (Alphonsea maingayi, Rinorea an-guifera, Macaranga Neobalanocarpus heimii). The leaves of Elaeis guineensis were also sampled at an oil palm plantation near the forest reserve area. At KEW, we sampled the leaves of Chamaecyparis obtusa, from both the top (18 m) and middle (16 m) of the canopy as well as leaves of Eurya japonica at the forest floor. Incubation experiments revealed that CH4 was emitted from leaves of the tested species sampled at two sites, although CH4 fluxes showed variations on a daily basis. These results suggest that tree leaves both at Pasoh and KEW might function as a small CH4 source, but their contribution to the CH4 exchange of the total forest ecosystem is very small compared to the soil CH4 flux.