Persistent collapse of biomass in Amazonian forest edges following deforestation leads to unaccounted carbon losses.
Persistent collapse of biomass in Amazonian forest edges following deforestation leads to unaccounted carbon losses.
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DOI：
10.1126/sciadv.aaz8360
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发表时间：
2020-09
期刊：
影响因子：
13.6
通讯作者：
Saatchi SS
中科院分区：
文献类型：
--
作者：
Silva Junior CHL;Aragão LEOC;Anderson LO;Fonseca MG;Shimabukuro YE;Vancutsem C;Achard F;Beuchle R;Numata I;Silva CA;Maeda EE;Longo M;Saatchi SS
2001年至2015年间，亚马逊地区因森林边缘效应损失了9.47亿吨碳，约占森林砍伐损失的30%。森林砍伐是热带森林碳损失的主要驱动因素，但它并不是单独起作用的。森林破碎化是森林砍伐过程的一个结果特征，它促进了边缘效应引起的间接碳损失。减少热带地区碳排放的政策并没有隐含地考虑到这一过程。在此，我们使用遥感方法估算了2001 - 2015年期间亚马逊地区由边缘效应驱动的碳损失。我们发现与边缘效应相关的碳损失（947 Tg C）相当于森林砍伐损失（2592 Tg C）的三分之一。尽管森林砍伐造成的碳损失呈7 Tg C - 1年的显著负趋势，但边缘效应造成的碳损失保持不变，平均为63±8 Tg C - 1年。因此，边缘效应造成的碳损失是一种额外的未量化通量，可以抵消通过减少森林砍伐而避免的碳排放，从而损害《巴黎协定》的大胆目标。
Amazonia lost 947 million tons of carbon induced by forest edge effect between 2001 and 2015, about 30% of deforestation losses. Deforestation is the primary driver of carbon losses in tropical forests, but it does not operate alone. Forest fragmentation, a resulting feature of the deforestation process, promotes indirect carbon losses induced by edge effect. This process is not implicitly considered by policies for reducing carbon emissions in the tropics. Here, we used a remote sensing approach to estimate carbon losses driven by edge effect in Amazonia over the 2001 to 2015 period. We found that carbon losses associated with edge effect (947 Tg C) corresponded to one-third of losses from deforestation (2592 Tg C). Despite a notable negative trend of 7 Tg C year−1 in carbon losses from deforestation, the carbon losses from edge effect remained unchanged, with an average of 63 ± 8 Tg C year−1. Carbon losses caused by edge effect is thus an additional unquantified flux that can counteract carbon emissions avoided by reducing deforestation, compromising the Paris Agreement’s bold targets.
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影响因子：
16.6
作者：
Chaplin-Kramer R;Ramler I;Sharp R;Haddad NM;Gerber JS;West PC;Mandle L;Engstrom P;Baccini A;Sim S;Mueller C;King H
通讯作者：
King H
影响因子：
5
作者：
Almeida, Danilo R. A.;Stark, Scott C.;Brancalion, Pedro H. S.
通讯作者：
Brancalion, Pedro H. S.
影响因子：
1.4
作者：
D'Angelo, SA;Andrade, ACS;Mesquita, RCG
通讯作者：
Mesquita, RCG
影响因子：
5.9
作者：
Armenteras, Dolors;Marisol Gonzalez, Tania;Retana, Javier
通讯作者：
Retana, Javier
影响因子：
16.6
作者：
Brinkmann KO;Zhao J;Pourdavoud N;Becker T;Hu T;Olthof S;Meerholz K;Hoffmann L;Gahlmann T;Heiderhoff R;Oszajca MF;Luechinger NA;Rogalla D;Chen Y;Cheng B;Riedl T
通讯作者：
Riedl T