Co-limitation of photosynthetic capacity by nitrogen and phosphorus in West Africa woodlands

Tomas Ferreira Domingues, Patrick Meir, Ted R. Feldpausch, Gustavo Saiz, Elmar M. Veenendaal, Franziska Schrodt, Michael Bird, Gloria Djagbletey, Fidele Hien, Halidou Compaore, Adama Diallo, John Grace, Jon Lloyd

Research output: Contribution to journalLiterature reviewpeer-review

Abstract

Photosynthetic leaf traits were determined for savanna and forest ecosystems in West Africa, spanning a large range in precipitation. Standardized major axis fits revealed important differences between our data and reported global relationships. Especially for sites in the drier areas, plants showed higher photosynthetic rates for a given N or P when compared with relationships from the global data set. The best multiple regression for the pooled data set estimated V-cmax and J(max) from N-DW and S. However, the best regression for different vegetation types varied, suggesting that the scaling of photosynthesis with leaf traits changed with vegetation types. A new model is presented representing independent constraints by N and P on photosynthesis, which can be evaluated with or without interactions with S. It assumes that limitation of photosynthesis will result from the least abundant nutrient, thereby being less sensitive to the allocation of the non-limiting nutrient to non-photosynthetic pools. The model predicts an optimum proportionality for N and P, which is distinct for V-cmax and J(max) and inversely proportional to S. Initial tests showed the model to predict V-cmax and J(max) successfully for other tropical forests characterized by a range of different foliar N and P concentrations.

Original languageEnglish
Pages (from-to)959-980
Number of pages22
JournalPlant, Cell and Environment
Volume33
Issue number6
DOIs
Publication statusPublished - Jun 2010

Keywords

  • A-C-i curves
  • dry forest
  • NPP
  • savanna
  • tropical rain forest
  • photosynthesis
  • TROPICAL RAIN-FOREST
  • GAS-EXCHANGE MEASUREMENTS
  • LEAF TRAIT RELATIONSHIPS
  • USE EFFICIENCY
  • C-3 PLANTS
  • TERRESTRIAL BIOSPHERE
  • CARBON ASSIMILATION
  • LIGHT AVAILABILITY
  • TEMPERATE FOREST
  • SHADE TOLERANCE

Cite this