Effects of typhoon damage on the carbon dynamics of a larch forest

台风灾害对落叶松林碳动态的影响

• 批准号: 17310017
• 负责人: HIRANO Takashi
• 金额: $ 10.38万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17310017/
• 关键词: Larch Forest; Typhoon storm; Natural disturbances; Carbon balance; Carbon pool; Vegetation recovery; CO_2 flux; Eddy covariance technique; 風倒害; 自動開閉チャンバー; CO_2収支; 炭素動熊; フラックス観測; 炭素動態; 炭素蓄積量

A plantation (42°44'N, 141°31'E) of Japanese larch (Larix kaempferi Sarg.) in Tomakomai, Hokkaido, Japan was destroyed by Typhoon Songda in September 2004. About 90% trees were blown down by strong wind. In this study, we compared vegetation properties, biomass and net ecosystem CO_2 uptake (NEP) before and after the typhoon damage. Before the typhoon damage, this forest was a 45-year-old plantation of Japanese larch with some broad-leaved trees. The canopy height was 15 m and the maximum leaf area index (LAI) was 5.6m^2 m^<-2>. After the typhoon, all stems of larch trees were removed from the forest floor for commercial use, whereas stumps and branches were left. NEP was continuously measured using the eddy covariance technique and a multichannel automated chamber system for the growing season of 5 months from June through November in 2006 and 2007. Ecosystem respiration (RE) in the daytime was estimated from soil temperature at 0.01m depth using an empirical model derived from nighttime NEE. Gross primary production (GPP) was calculated as the difference between RE and NEE (GPP=RE-NEE). Cumulative values of RE, GPP and NEP for the 5 months were 1125, 1370 and 245 gC m^<-2>, respectively, on average between 2001 and 2003, whereas they were 711, 607 and -104gC m^<-2>, respectively, in 2006, and 664, 622 and -42 gC m^<-2>, respectively, in 2007. This clear change of NEP indicates that the forest ecosystem changed from carbon sink to source by the typhoon damage, and the strength of carbon source was gradually decreasing because of vegetation recovery.

2004年9月，位于日本北海道Tomakomai的日本落叶松人工林（42°44′n, 141°31′e）被台风“松达”摧毁。大约90%的树被强风吹倒。本研究比较了台风破坏前后植被特性、生物量和生态系统净CO_2吸收量。在台风破坏之前，这片森林是一个有45年历史的日本落叶松种植园，还有一些阔叶树。冠层高度为15 m，最大叶面积指数（LAI）为5.6m^2 m^<-2>。台风过后，所有落叶松的茎都被从森林地面移走用于商业用途，只留下了树桩和树枝。在2006年和2007年6月至11月的5个月生长期，使用涡动相关技术和多通道自动室系统连续测量NEP。利用夜间NEE的经验模型，从0.01m深度的土壤温度估算了白天的生态系统呼吸（RE）。初级生产总值（GPP）计算为可再生能源与新能源的差值（GPP=RE-NEE）。2001 - 2003年5个月的RE、GPP和NEP累积平均值分别为1125、1370和245 gC m^<-2>， 2006年平均为711、607和-104gC m^<-2>， 2007年平均为664、622和-42 gC m^<-2>。NEP的明显变化表明，台风灾害使森林生态系统从碳汇向碳源转变，植被恢复使碳源强度逐渐降低。

项目成果

森林でのフラックス観測における欠測値補間への適応的計算の応用の試み

自适应计算应用于森林通量观测缺失值插值的尝试

• 发表时间: 2005
• 作者: Norimichi Takenaka;Kayoko Takayama;Naofumi Ojiro;Hiroshi Suekane;Makoto Hiroi Yasuhiro Sadanaga;Hiroshi Bandow;大場真
• 通讯作者: 大場真

Comparison of eddy CO_2 fluxes measured with open-path and closedpath systems

开路和闭路系统测量的涡流CO_2通量比较

• 发表时间: 2005
• 作者: Hirata R;Hirano T;Saigusa N;Takagi K;Yone Y;Liang N;Fujinuma Y;Inukai K
• 通讯作者: Inukai K

カラマツ林風倒害跡地におけるCO_2収支

落叶松林风灾区的 CO_2 平衡

• 发表时间: 2008
• 作者: Hirata R;Hirano T;Mogami J;Fujinuma Y;Inukai K;Saigusa N;Yamamoto S;鬼頭宏幸;平野高司
• 通讯作者: 平野高司

CO_2 balance of a heavily-disturbed larch forest

严重扰动落叶松林的CO_2平衡

• 发表时间: 2008
• 作者: Hirano T;Sano T;Liang N;Oguma;H;Fujinuma Y
• 通讯作者: Fujinuma Y

Thematic understanding of ecosystem by evaluating SOM classification based on predictable performance of adaptive models

基于自适应模型的可预测性能评估 SOM 分类，对生态系统进行主题理解

• 发表时间: 2007
• 作者: Kitho H;Sano T;Hirano T;Liang N;Oguma H;Fujinuma Y;Makoto Ooba
• 通讯作者: Makoto Ooba