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从树到地块:调查沿着马来西亚婆罗洲沙巴的伐木梯度沿着树干CO2流和其驱动因素

Maria B Mills¹, Sabine Both², Palasiah Jotan³

¹School of Geography, Geology and the Environment, University of Leicester, Leicester, LE1 7RH, UK.

The New phytologist

|August 16, 2024

概括

在婆罗洲森林中,伐木增加了树干每面积的二氧化碳排放量,但由于树干表面积的变化,总体排放量仍然相似. 砍伐森林优先考虑增长而不是维护.

科学领域:

森林生态森林生态
生物地质化学生物地质化学
碳循环是碳循环的过程.

背景情况:

树干呼吸是森林自营呼吸的一个重要组成部分.
在空间尺度和土地利用梯度上,干呼吸的驱动因素尚未得到充分理解.
伐木干扰影响森林碳动态,包括树干二氧化碳排放 (EA).

研究的目的:

量化伐木干扰对马来西亚婆罗洲树干二氧化碳排放 (EA) 的影响.
为了检查EA的驱动因素在树木和树立水平在整个伐木梯度.

主要方法:

在9个1公地块的树木和树层次上量化了树干CO2排放量 (EA).
利用从被大量砍伐到老生长森林的伐木梯度.
在EA测量中采用静态室法.

主要成果:

与老生长地块相比,在伐木地块中,每单位茎面积的EA较高.
由于树干表面积,在伐木和老生长地块之间没有显著的EA差异.
增加了对生长呼吸和碳利用效率的分配.

结论:

伐木改变了资源分配战略,优先考虑增长,以应对增加的光线.
旧生长的森林优先考虑维护和细胞结构,导致每单位面积的EA降低.
树木的大小,生长和森林类型在多个尺度上显著影响EA变化.

关键词:

碳流是指碳的流动.退化森林的退化森林土地使用法.记录日志记录日志记录日志干呼吸干呼吸干呼吸热带雨林的热带森林是什么

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