Controlling factors on the interannual CO2 budget at a subarctic black spruce forest in interior Alaska
Controlling factors on the interannual CO2 budget at a subarctic black spruce forest in interior Alaska
复制标题
阿拉斯加内陆亚北极黑云杉林年际二氧化碳收支的控制因素
DOI：
10.1111/j.1600-0889.2006.00205.x
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
A. Miyata
中科院分区：
文献类型：
--
作者：
M. Ueyama;Y. Harazono;E. Ohtaki;A. Miyata
涡度协方差方法被应用于测量净生态系统CO2交换（NEE）在亚北极黑云杉林在阿拉斯加内陆在2003年和2004年。为了明确CO2的收支，我们通过应用碳收支分析工具将光合作用和呼吸作用分开，其中潜在光合速率、光利用效率和光合作用的抑制因素被评估。潜在光合速率和光能利用效率与林下叶面积指数有关。测定的光合作用最适温度高于15 ℃，高于其它北方森林。2004年盛夏干旱对光合作用和呼吸作用都有抑制作用，但对光合作用的抑制作用更强，导致NEE略有下降。2003年的累积呼吸作用和光合作用分别为2.29和-2.50千克CO2/平方米，2004年为2.37和-2.44千克CO2/平方米，因此计算出的2003年和2004年的年度CO2汇预算分别为-210和-70克CO2/平方米。
The eddy covariance method was applied to measure net ecosystem CO2 exchange (NEE) at a subarctic black spruce forest in interior Alaska during 2003 and 2004. To clarify the budget of CO2, we divided photosynthesis and respiration by applying the Carbon Budget Analysis Tool, in which the potential photosynthetic rate, the light use efficiency, and the suppression factors on photosynthesis were evaluated. The potential photosynthetic rate and the light use efficiency were related with the understory leaf area index. The determined optimal temperature of photosynthesis was higher than 15 ◦C, which was higher than that of other boreal forests. Drought in midsummer of 2004 suppressed both photosynthesis and respiration, but the suppression was more effective in photosynthesis, resulting in a slightly decreased NEE. Cumulative respiration and photosynthesis were 2.29 and -2.50 kg CO2 m-2 in 2003, and 2.37 and -2.44 kg CO2 m-2 in 2004, resulting in calculated annual CO2 sink budgets of -210 and -70 g CO2 m-2 in 2003 and 2004, respectively.
影响因子：
64.8
作者：
Ciais, P;Reichstein, M;Valentini, R
通讯作者：
Valentini, R