5 documents found, page 1 of 1
Climate seasonality limits leaf carbon assimilation and wood productivity in tr...
Wagner, Fabien H.; Hérault, Bruno; Bonal, Damien; Stahl, Clément; Anderson, Liana Oighenstein; Baker, Timothy R.; Sebastian Becker, GabrielThe seasonal climate drivers of the carbon cycle in tropical forests remain poorly known, although these forests account for more carbon assimilation and storage than any other terrestrial ecosystem. Based on a unique combination of seasonal pan-tropical data sets from 89 experimental sites (68 include aboveground wood productivity measurements and 35 litter productivity measurements), their associated canopy p...
Biological processes dominate seasonality of remotely sensed canopy greenness i...
Wu, Jin; Kobayashi, Hideki; Stark, Scott C.; Meng, Ran; Guan, Kaiyu; Tran, Ngoc Nguyen; Gao, Sicong; Yang, Wei; Restrepo-Coupé, Natalia; Miura, TomoakiSatellite observations of Amazon forests show seasonal and interannual variations, but the underlying biological processes remain debated. Here we combined radiative transfer models (RTMs) with field observations of Amazon forest leaf and canopy characteristics to test three hypotheses for satellite-observed canopy reflectance seasonality: seasonal changes in leaf area index, in canopy-surface leafless crown fr...
Convergence in relationships between leaf traits, spectra and age across divers...
Wu, Jin; Chavana-Bryant, Cecilia; Prohaska, Neill; Serbin, Shawn P.; Guan, Kaiyu; Albert, Loren P.; Yang, Xi; Van Leeuwen, Willem Jan DirkLeaf age structures the phenology and development of plants, as well as the evolution of leaf traits over life histories. However, a general method for efficiently estimating leaf age across forests and canopy environments is lacking. Here, we explored the potential for a statistical model, previously developed for Peruvian sunlit leaves, to consistently predict leaf ages from leaf reflectance spectra across tw...
Leaf development and demography explain photosynthetic seasonality in Amazon ev...
Wu, Jin; Albert, Loren P.; Lopes, Aline Pontes; Restrepo-Coupé, Natalia; Hayek, Matthew N.; Wiedemann, Kenia T.; Guan, Kaiyu; Stark, Scott C.In evergreen tropical forests, the extent, magnitude, and controls on photosynthetic seasonality are poorly resolved and inadequately represented in Earth system models. Combining camera observations with ecosystem carbon dioxide fluxes at forests across rainfall gradients in Amazônia, we show that aggregate canopy phenology, not seasonality of climate drivers, is the primary cause of photosynthetic seasonality...
Climate seasonality limits leaf carbon assimilation and wood productivity in tr...
Wagner, Fabien H.; Hérault, Bruno; Bonal, Damien; Stahl, Clment; Anderson, Liana O.; Baker, Timothy R.; Sebastian Becker, Gabriel; Beeckman, HansMade available in DSpace on 2018-12-11T17:02:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-04-28; The seasonal climate drivers of the carbon cycle in tropical forests remain poorly known, although these forests account for more carbon assimilation and storage than any other terrestrial ecosystem. Based on a unique combination of seasonal pan-tropical data sets from 89 experimental sites (68 include ...