Resistance of African tropical forests to an extreme climate anomaly.
Resistance of African tropical forests to an extreme climate anomaly.
复制标题
DOI：
10.1073/pnas.2003169118
复制
发表时间：
2021-05-25
影响因子：
11.1
通讯作者：
Lewis SL
中科院分区：
文献类型：
--
作者：
Bennett AC;Dargie GC;Cuni-Sanchez A;Tshibamba Mukendi J;Hubau W;Mukinzi JM;Phillips OL;Malhi Y;Sullivan MJP;Cooper DLM;Adu-Bredu S;Affum-Baffoe K;Amani CA;Banin LF;Beeckman H;Begne SK;Bocko YE;Boeckx P;Bogaert J;Brncic T;Chezeaux E;Clark CJ;Daniels AK;de Haulleville T;Djuikouo Kamdem MN;Doucet JL;Evouna Ondo F;Ewango CEN;Feldpausch TR;Foli EG;Gonmadje C;Hall JS;Hardy OJ;Harris DJ;Ifo SA;Jeffery KJ;Kearsley E;Leal M;Levesley A;Makana JR;Mbayu Lukasu F;Medjibe VP;Mihindu V;Moore S;Nssi Begone N;Pickavance GC;Poulsen JR;Reitsma J;Sonké B;Sunderland TCH;Taedoumg H;Talbot J;Tuagben DS;Umunay PM;Verbeeck H;Vleminckx J;White LJT;Woell H;Woods JT;Zemagho L;Lewis SL
热带森林对炎热和干旱的反应是预测气候变化未来影响的关键不确定因素。2015-2016年厄尔尼诺南方涛动（ENSO）导致整个热带地区前所未有的高温和低降水，包括研究非常少的非洲热带森林地区。我们评估非洲森林ENSO响应使用地面测量。在100个长期试验小区中，创纪录的高温并没有显著减少树木生长的碳收益，也没有显著增加树木死亡的碳损失。总体而言，尽管气候异常，但在厄尔尼诺/南方涛动期间，森林继续获得活生物量。我们的分析虽然仅限于非洲热带森林，但表明它们可能比亚马逊和亚洲森林更能抵抗极端气候。热带森林对环境变化的反应是预测气候变化未来影响的关键不确定因素。2015-2016年厄尔尼诺南方涛动的正相导致热带地区前所未有的高温和低降水，对全球碳循环产生重大影响。非洲热带森林的作用尚不确定，因为它们对短期干旱和温度异常的反应尚有待利用实地测量来确定。非洲热带森林可能特别敏感，因为与亚马逊或亚洲森林相比，它们存在于相对干燥的条件下，或者它们可能由于大量适应干旱的物种而更具抵抗力。在这里，我们报告的反应结构完整的古老的生长低地热带森林编目内的非洲热带雨林观测网络（AfriTRON）。我们使用了来自六个国家的100个长期库存图，每个图在2015-2016年厄尔尼诺事件之前和之后至少测量了两次。这些地块经历了有记录以来最高的温度和最干燥的条件。创纪录的温度没有显着减少树木生长的碳收益或显着增加树木死亡的碳损失，但创纪录的干旱显着减少净碳吸收。总体而言，由于厄尔尼诺事件，这些森林的长期生物量增长有所减少，但尽管环境条件极端，这些地块仍然是活生物量碳汇（0.51 ± 0.40 Mg C ha-1 y-1）。我们的分析虽然仅限于非洲热带森林，但表明它们可能比亚马逊和亚洲森林更能抵抗极端气候。
The responses of tropical forests to heat and drought are critical uncertainties in predicting the future impacts of climate change. The 2015–2016 El Niño Southern Oscillation (ENSO) resulted in unprecedented heat and low precipitation across the tropics, including in the very poorly studied African tropical forest region. We assess African forest ENSO responses using on-the-ground measurements. Across 100 long-term plots, record high temperatures did not significantly reduce carbon gains from tree growth or significantly increase carbon losses from tree mortality. Overall, despite the climate anomaly, forests continued to gain live biomass over the ENSO period. Our analyses, while limited to African tropical forests, suggest that they may be more resistant to climate extremes than Amazonian and Asian forests. The responses of tropical forests to environmental change are critical uncertainties in predicting the future impacts of climate change. The positive phase of the 2015–2016 El Niño Southern Oscillation resulted in unprecedented heat and low precipitation in the tropics with substantial impacts on the global carbon cycle. The role of African tropical forests is uncertain as their responses to short-term drought and temperature anomalies have yet to be determined using on-the-ground measurements. African tropical forests may be particularly sensitive because they exist in relatively dry conditions compared with Amazonian or Asian forests, or they may be more resistant because of an abundance of drought-adapted species. Here, we report responses of structurally intact old-growth lowland tropical forests inventoried within the African Tropical Rainforest Observatory Network (AfriTRON). We use 100 long-term inventory plots from six countries each measured at least twice prior to and once following the 2015–2016 El Niño event. These plots experienced the highest temperatures and driest conditions on record. The record temperature did not significantly reduce carbon gains from tree growth or significantly increase carbon losses from tree mortality, but the record drought did significantly decrease net carbon uptake. Overall, the long-term biomass increase of these forests was reduced due to the El Niño event, but these plots remained a live biomass carbon sink (0.51 ± 0.40 Mg C ha−1 y−1) despite extreme environmental conditions. Our analyses, while limited to African tropical forests, suggest they may be more resistant to climatic extremes than Amazonian and Asian forests.
登录
查看更多内容
DOI：
10.1002/joc.5086
发表时间：
2017-10-01
期刊：
INTERNATIONAL JOURNAL OF CLIMATOLOGY
影响因子：
--
作者：
Fick, Stephen E.;Hijmans, Robert J.
通讯作者：
Hijmans, Robert J.
影响因子：
18.3
作者：
Berzaghi, Fabio;Longo, Marcos;Doughty, Christopher E.
通讯作者：
Doughty, Christopher E.
影响因子：
8.8
作者：
Fauset, Sophie;Baker, Timothy R.;Swaine, Michael D.
通讯作者：
Swaine, Michael D.
影响因子：
5.2
作者：
Aragao, Luiz Eduardo O. C.;Malhi, Yadvinder;Shimabukuro, Yosio Edemir
通讯作者：
Shimabukuro, Yosio Edemir
影响因子：
5
作者：
Berdanier, Aaron B.;Clark, James S.
通讯作者：
Clark, James S.