Carbon-phosphorus cycle models overestimate CO₂ enrichment response in a mature Eucalyptus forest.

ABSTRACT: The importance of phosphorus (P) in regulating ecosystem responses to climate change has fostered P-cycle implementation in land surface models, but their CO₂ effects predictions have not been evaluated against measurements. Here, we perform a data-driven model evaluation where simulations of eight widely used P-enabled models were confronted with observations from a long-term free-air CO₂ enrichment experiment in a mature, P-limited Eucalyptus forest. We show that most models predicted the correct sign and magnitude of the CO₂ effect on ecosystem carbon (C) sequestration, but they generally overestimated the effects on plant C uptake and growth. We identify leaf-to-canopy scaling of photosynthesis, plant tissue stoichiometry, plant belowground C all

SUBMITTER: Jiang M 

PROVIDER: S-EPMC11221523 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature