Global climate and nutrient controls of photosynthetic capacity.

ABSTRACT: There is huge uncertainty about how global exchanges of carbon between the atmosphere and land will respond to continuing environmental change. A better representation of photosynthetic capacity is required for Earth System models to simulate carbon assimilation reliably. Here we use a global leaf-trait dataset to test whether photosynthetic capacity is quantitatively predictable from climate, based on optimality principles; and to explore how this prediction is modified by soil properties, including indices of nitrogen and phosphorus availability, measured in situ. The maximum rate of carboxylation standardized to 25 °C (V_cmax25) was found to be proportional to growing-season irradiance, and to increase-as predicted-towards both colder and drier climates. Individual species' de

SUBMITTER: Peng Y 

PROVIDER: S-EPMC8042000 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature