Vertical profiles of leaf photosynthesis and leaf traits and soil nutrients in two tropical rainforests in French Guiana before and after a 3-year nitrogen and phosphorus addition experiment

[摘要] Terrestrial biosphere models typically use thebiochemical model of Farquhar, von Caemmerer, and Berry (1980) to simulatephotosynthesis, which requires accurate values of photosynthetic capacity ofdifferent biomes. However, data on tropical forests are sparse and highlyvariable due to the high species diversity, and it is still highly uncertainhow these tropical forests respond to nutrient limitation in terms of C uptake. Tropical forests often grow on soils low in phosphorus ( P ) and are, ingeneral, assumed to be P rather than nitrogen ( N ) limited. However, therelevance of P as a control of photosynthetic capacity is still debated.Here, we provide a comprehensive dataset of vertical profiles ofphotosynthetic capacity and important leaf traits, including leaf N and P concentrations, from two 3-year, large-scale nutrient additionexperiments conducted in two tropical rainforests in French Guiana. Thesedata present a unique source of information to further improve modelrepresentations of the roles of N , P , and other leaf nutrients inphotosynthesis in tropical forests. To further facilitate the use of ourdata in syntheses and model studies, we provide an elaborate list ofancillary data, including important soil properties and nutrients, alongwith the leaf data. As environmental drivers are key to improve ourunderstanding of carbon ( C ) and nutrient cycle interactions, this comprehensivedataset will aid to further enhance our understanding of how nutrientavailability interacts with C uptake in tropical forests. The data are available at https://doi.org/10.5281/zenodo.5638236 (Verryckt, 2021).

[学科分类] 眼科学