...
首页> 外文期刊>Ecology letters >Global meta-analysis of wood decomposition rates: a role for trait variation among tree species?
【24h】

Global meta-analysis of wood decomposition rates: a role for trait variation among tree species?

机译:木材分解速率的全球荟萃分析:树木物种性状变异的作用?

获取原文
获取原文并翻译 | 示例
           

摘要

The carbon flux from woody debris, a crucial uncertainty within global carbon-climate models, is simultaneously affected by climate, site environment and species-based variation in wood quality. In the first global analysis attempting to explicitly tease out the wood quality contribution to decomposition, we found support for our hypothesis that, under a common climate, interspecific differences in wood traits affect woody debris decomposition patterns. A meta-analysis of 36 studies from all forested continents revealed that nitrogen, phosphorus, and C : N ratio correlate with decomposition rates of angiosperms. In addition, gymnosperm wood consistently decomposes slower than angiosperm wood within common sites, a pattern that correlates with clear divergence in wood traits between the two groups. New empirical studies are needed to test whether this difference is due to a direct effect of wood trait variation on decomposer activity or an indirect effect of wood traits on decomposition microsite environment. The wood trait-decomposition results point to an important role for changes in the wood traits of dominant tree species as a driver of carbon cycling, with likely feedback to atmospheric CO2 particularly where angiosperm species replace gymnosperms regionally. Truly worldwide upscaling of our results will require further site-based multi-species wood trait and decomposition data, particularly from low-latitude ecosystems.
机译:木屑产生的碳通量是全球碳气候模型中的关键不确定因素,同时受到气候,场地环境和基于物种的木材质量变化的影响。在第一个试图明确弄清木材质量对分解的贡献的全球分析中,我们发现我们的假设得到支持,即在共同的气候下,木材性状的种间差异会影响木质碎片的分解方式。对来自所有森林大洲的36项研究进行的荟萃分析显示,氮,磷和C:N的比例与被子植物的分解率相关。此外,裸子植物的木材在常见部位的分解速度始终比被子植物的木材慢,这与两组之间木材性状的明显差异有关。需要新的经验研究来测试这种差异是由于木材性状变化对分解活性的直接影响还是由于木材性状对分解微场所环境的间接影响。木材性状分解的结果表明,作为碳循环的驱动力,优势树种的木材性状的变化具有重要作用,尤其是在被子植物物种取代裸子植物的情况下,可能会反馈到大气中的二氧化碳。要真正在全球范围内扩大我们的研究结果,将需要进一步基于现场的多物种木材性状和分解数据,尤其是来自低纬度生态系统的数据。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号