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Enhancing carbon sinks in China using a spatially-optimized forestation strategy.

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Area of Science:

  • Forestry and Ecology
  • Climate Change Mitigation
  • Carbon Sequestration

Background:

  • China aims to expand forests by 49.5 million hectares by 2050 for carbon sequestration.
  • Current carbon benefit estimates often overlook 'forest edge' effects, which increase tree mortality due to environmental stressors.

Purpose of the Study:

  • To quantify the impact of forest edge effects on biomass carbon storage.
  • To develop a spatial optimization strategy for forestation that minimizes these negative edge effects.

Main Methods:

  • Analyzed the impact of forest proximity on biomass carbon storage.
  • Developed a spatial optimization model for forest planting to mitigate edge effects.

Main Results:

  • Forest edges significantly reduce biomass carbon storage.
  • Optimized forestation strategies increase carbon gain by 51% (986 ± 22 Tg by 2060).
  • Reduced edge effects account for approximately half of the total carbon gain.

Conclusions:

  • Ignoring forest edge effects can lead to overestimations of carbon sink potential.
  • Spatially optimized forestation is crucial for maximizing climate mitigation and ecological benefits.