articleProceedings of the National Academy of SciencesFeb 11, 2025HYBRID OA

Substrate and climate determine terrestrial litter decomposition

Fujian Normal University · Sanming University · +7 more institutions

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Abstract

Litter decomposition is a fundamental biogeochemical process for carbon flux and nutrient cycling in terrestrial ecosystems, yet the global variation in decomposition rates and their covariations with climate and substrate are not fully understood. Here, we synthesized a global dataset of 6,733 independent observations across six continents to illustrate the climatic and substrate controls over litter decomposition. The average decomposition rates of various litter types ranged from 0.74 to 4.01 y −1 across polar to tropics, showing a large geographical span. Litter substrate and climate directly explained 36 and 30% of the variations in decomposition rates, with the carbon-to-nitrogen ratio identified as the…

Citation impact

44
total citations
FWCI
39.00
Percentile
100%
References
67
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Authors

12

Topics & keywords

Keywords
  • Biogeochemical cycle
  • Litter
  • Substrate (aquarium)
  • Decomposition
  • Environmental science
  • Carbon cycle
  • Ecosystem
  • Nutrient cycle
UN Sustainable Development Goals
  • Climate action
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