4.8 Article

Mature Andean forests as globally important carbon sinks and future carbon refuges

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NATURE COMMUNICATIONS
卷 12, 期 1, 页码 -

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NATURE PORTFOLIO
DOI: 10.1038/s41467-021-22459-8

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资金

  1. Direccion de Investigaciones de la Universidad Nacional de Colombia Sede Medellin (DIME)
  2. Swiss Agency for Development and Cooperation (SDC) [PA0042-C011-0031]
  3. Universidad de las Americas Research Grant [FGE.FCC.19.15]
  4. COLCIENCIAS [767]
  5. National Science Foundation [DEB-0101775, DEB-0743457, DEB-1836353]
  6. National Geographic Society [NGS 7754-04, NGS 8047-06]
  7. US National Science Foundation [DEB LTREB 1754664, DEB 1753621]
  8. ERC [291585]
  9. Institute of International Education Fulbright Fellowship
  10. Swiss Cooperation through the Programa Bosques Andinos
  11. European Research Council (ERC) [291585] Funding Source: European Research Council (ERC)

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The study demonstrates the high aboveground carbon sink efficiency of Andean forests, highlighting their potential as future carbon refuges and emphasizing the need to reduce deforestation and increase restoration efforts.
It is largely unknown how South America's Andean forests affect the global carbon cycle, and thus regulate climate change. Here, we measure aboveground carbon dynamics over the past two decades in 119 monitoring plots spanning a range of >3000m elevation across the subtropical and tropical Andes. Our results show that Andean forests act as strong sinks for aboveground carbon (0.670.08 Mg C ha(-1) y(-1)) and have a high potential to serve as future carbon refuges. Aboveground carbon dynamics of Andean forests are driven by abiotic and biotic factors, such as climate and size-dependent mortality of trees. The increasing aboveground carbon stocks offset the estimated C emissions due to deforestation between 2003 and 2014, resulting in a net total uptake of 0.027 Pg C y(-1). Reducing deforestation will increase Andean aboveground carbon stocks, facilitate upward species migrations, and allow for recovery of biomass losses due to climate change. Here, the authors investigate the aboveground carbon sink efficiency of Andean forests. The study shows the high potential of these forests to serve as future carbon refuges, and urges to reduce deforestation and increase restoration.

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