小柯机器人

英国约克大学Aida Cuni-Sanchez研究小组的最新研究揭示了非洲热带山地森林的高地碳储量。相关论文于2021年8月25日在线发表于国际学术期刊《自然》杂志。

在本研究中，研究人员收集和分析了结构完整的原始森林(AfriMont)数据集，这些数据集包涵了跨12个非洲国家44个山地地点的数据。研究发现AfriMont地块网络中，山地站点的平均地上树木生物量碳（AGC）储量为149.4兆克碳每公顷（95%置信区间137.1-164.2），与非洲热带雨林观测网络中低地森林的水平相当，但约有70%比新热带地区山地平均值高，约有32%比新热带地区低地森林平均值高。

值得注意的是，该结果比政府间气候变化专门委员会对非洲这些森林地区的默认值高三分之二。研究发现非洲低地森林中树木的低茎密度和高丰度反映在采样的山地森林中。然而，这种碳储存濒临灭绝：研究人员估计自2000年以来已有80万公顷古老的非洲山地森林消失。该研究提供了依据特定国家山地森林地块网络建模的AGC存量估计方法，以帮助指导森林保护和重新造林等措施。研究还强调了保护生物多样性和这些富含碳储存生态系统的必要性。

据介绍，热带森林储存了40-50%的陆地植被碳储量。然而，对AGC库的空间变化仍然知之甚少，特别是热带山地森林的AGC。由于气候和土壤随海拔升高而发生改变，与低海拔森林相比，热带山地森林中的AGC存量较低。

附：英文原文

Title: High aboveground carbon stock of African tropical montane forests

Author: Cuni-Sanchez, Aida, Sullivan, Martin J. P., Platts, Philip J., Lewis, Simon L., Marchant, Rob, Imani, Grard, Hubau, Wannes, Abiem, Iveren, Adhikari, Hari, Albrecht, Tomas, Altman, Jan, Amani, Christian, Aneseyee, Abreham B., Avitabile, Valerio, Banin, Lindsay, Batumike, Rodrigue, Bauters, Marijn, Beeckman, Hans, Begne, Serge K., Bennett, Amy C., Bitariho, Robert, Boeckx, Pascal, Bogaert, Jan, Bruning, Achim, Bulonvu, Franklin, Burgess, Neil D., Calders, Kim, Chapman, Colin, Chapman, Hazel, Comiskey, James, de Haulleville, Thales, Decuyper, Mathieu, DeVries, Ben, Dolezal, Jiri, Droissart, Vincent, Ewango, Corneille, Feyera, Senbeta, Gebrekirstos, Aster, Gereau, Roy, Gilpin, Martin, Hakizimana, Dismas, Hall, Jefferson, Hamilton, Alan, Hardy, Olivier, Hart, Terese, Heiskanen, Janne, Hemp, Andreas, Herold, Martin, Hiltner, Ulrike, Horak, David, Kamdem, Marie-Noel, Kayijamahe, Charles, Kenfack, David, Kinyanjui, Mwangi J., Klein, Julia, Lisingo, Janvier, Lovett, Jon, Lung, Mark, Makana, Jean-Remy, Malhi, Yadvinder, Marshall, Andrew, Martin, Emanuel H., Mitchard, Edward T. A., Morel, Alexandra

Issue&Volume: 2021-08-25

Abstract: Tropical forests store 40–50 per cent of terrestrial vegetation carbon1. However, spatial variations in aboveground live tree biomass carbon (AGC) stocks remain poorly understood, in particular in tropical montane forests2. Owing to climatic and soil changes with increasing elevation3, AGC stocks are lower in tropical montane forests compared with lowland forests2. Here we assemble and analyse a dataset of structurally intact old-growth forests (AfriMont) spanning 44 montane sites in 12 African countries. We find that montane sites in the AfriMont plot network have a mean AGC stock of 149.4 megagrams of carbon per hectare (95% confidence interval 137.1–164.2), which is comparable to lowland forests in the African Tropical Rainforest Observation Network4 and about 70 per cent and 32 per cent higher than averages from plot networks in montane2,5,6 and lowland7 forests in the Neotropics, respectively. Notably, our results are two-thirds higher than the Intergovernmental Panel on Climate Change default values for these forests in Africa8. We find that the low stem density and high abundance of large trees of African lowland forests4 is mirrored in the montane forests sampled. This carbon store is endangered: we estimate that 0.8 million hectares of old-growth African montane forest have been lost since 2000. We provide country-specific montane forest AGC stock estimates modelled from our plot network to help to guide forest conservation and reforestation interventions. Our findings highlight the need for conserving these biodiverse9,10 and carbon-rich ecosystems.

DOI: 10.1038/s41586-021-03728-4

Source: https://www.nature.com/articles/s41586-021-03728-4

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