Phenology is the dominant control of methane emissions in a tropical non-forested wetland.
Phenology is the dominant control of methane emissions in a tropical non-forested wetland.
复制标题
DOI：
10.1038/s41467-021-27786-4
复制
发表时间：
2022-01-10
影响因子：
16.6
通讯作者：
Skiba U
中科院分区：
文献类型：
--
作者：
Helfter C;Gondwe M;Murray-Hudson M;Makati A;Lunt MF;Palmer PI;Skiba U
热带湿地是大气甲烷(CH4)的重要来源，但由于缺乏直接观测，它们对全球CH4预算的重要性尚不确定。湿地的净排放是土壤中微生物生产和氧化以及向大气输送之间复杂的相互作用和协同变化的结果。在这里，我们表明物候是从博茨瓦纳奥卡万戈三角洲永久的热带植被沼泽向大气净CH4排放的总体控制，我们发现植被过程在亚日到年际的时间尺度上调制净CH4排放。如果不考虑纸莎草纸在调节甲烷排入大气层方面所起的作用，整个奥卡万戈三角洲的年度预算将被低估或高估两倍。我们的测量表明，将物候循环等营养过程纳入湿地CH4的排放预算是非常重要的。热带湿地是一个重要但未被充分研究的甲烷来源。在这里，对博茨瓦纳奥卡万戈三角洲一个常年热带沼泽的甲烷排放进行了三年的测量，发现物候是排放的主要控制因素。
Tropical wetlands are a significant source of atmospheric methane (CH4), but their importance to the global CH4 budget is uncertain due to a paucity of direct observations. Net wetland emissions result from complex interactions and co-variation between microbial production and oxidation in the soil, and transport to the atmosphere. Here we show that phenology is the overarching control of net CH4 emissions to the atmosphere from a permanent, vegetated tropical swamp in the Okavango Delta, Botswana, and we find that vegetative processes modulate net CH4 emissions at sub-daily to inter-annual timescales. Without considering the role played by papyrus on regulating the efflux of CH4 to the atmosphere, the annual budget for the entire Okavango Delta, would be under- or over-estimated by a factor of two. Our measurements demonstrate the importance of including vegetative processes such as phenological cycles into wetlands emission budgets of CH4. Tropical wetlands are a significant but understudied source of methane. Here, methane emissions were measured over three years in a perennial tropical swamp in the Okavango Delta, Botswana, finding phenology was the overarching control of emissions.
登录
查看更多内容
影响因子：
1.8
作者：
Gondwe, Mangaliso J.;Masamba, Wellington R. L.
通讯作者：
Masamba, Wellington R. L.
影响因子：
1.8
作者：
ARMSTRONG, J;ARMSTRONG, W
通讯作者：
ARMSTRONG, W
影响因子：
2
作者：
JOHNSON, IR;THORNLEY, JHM
通讯作者：
THORNLEY, JHM
影响因子：
5.2
作者：
Dlugokencky, E. J.;Bruhwiler, L.;Gatti, L. V.
通讯作者：
Gatti, L. V.
影响因子：
5.2
作者：
Dlugokencky, EJ;Houweling, S;Tans, PP
通讯作者：
Tans, PP