|mesures principales :
- Hydrological service: Coffee-Flux is monitoring and modelling the water balance partitioning (rainfall, interception, superficial runoff, infiltration, sapflow, soil water balance, evapo-transpiration, aquifer fluctuations and total streamflow), and the sediment yield from plot to watershed. One model was developed (Hydro-SVAT: Gómez-Delgado et al., 2011). Also δ18O/δD isotopic tracing experiments are underway (collaboration with UNA, Ricardo Sánchez-Murillo et al., 2015). 1 PhD thesis is achieved (Gómez-Delgado F., 2010), two are in progress (Benegas L.; Welsch K.) and 2 postgraduate fellowships achieved (Kinoshita, 2009; Deffner A.).
- Carbon service: Coffee-Flux is monitoring the leaf area index (LAI) using field and remote sensing techniques (High Resolution Multispectral Images; MODIS), the Net Primary Productivity (NPP: tree + coffee growth and mortality) above and below-ground (minirhizotrons, rhizotrons), the Gross Primary Productivity or (GPP = ecosystem photoynthesis), the ecosystem + soil respiration, the whole plant gas exchanges, the leaf gas exchanges and the Net Ecosystem Exchange (NEE) which is the ecosystem C balance, using combined eddy covariance, growth+litter monitoring and various plant chambers. The SOC, nitrogen, active C, non-crystalline clay minerals such as allophane, imogolite, ferrihydrite as well as metal-humus complexes have been surveyed, SOC and N were estimated by VISNIR and mapped (kriging) for the whole watershed (Kinoshita et al., 2015). 1 PhD is completed (Charbonnier F.), two PhD in progress (Perez Molina J.P., Vezy, R.), 6 MSc achieved (Taugourdeau S.; Audebert L.; Defrenet E.; Nespoulous, J., Khac E., Soma M.) and 2 post-graduate fellowships (Jarri, L., Cambou A., Guidat, F., Rançon, F.). One radiation absorption + photosynthesis + transpiration model is being used (MAESPA: Charbonnier et al., 2013).
- Nutrient balance: Coffee-Flux is monitoring nutrient inputs, assimilation and leaching, according to distance to shade trees and within an experimental display controlling fertilization (K. Van Den Meersche). Nitrates and P are also being monitored in aquifers and streamflow (PhD of K. Welsch).
Other GHGs emissions: a N2O & CO2 soil flux automatic monitoring experiment was settled in February 2016 in a fertilization trial, in collaboration with U. Copenhagen; Master of Carolin Mages.
- Protection against erosion: Coffee-Flux is monitoring erosion at plot scale (with trees and without trees) and sediment yield at the watershed scale (using automatic turbidimeter). Also in the PhD of Gómez-Delgado F. (2010).
- Coffee pests and diseases regulation: Incidence and severity of coffee pests and diseases (including coffee leaf rust) are being monitored under shaded and full sun conditions, and compared with or without treatment (C. Allinne). Incidence is also measured in function of the fertilization level.
- Effect of Shade on coffee microclimate:The CATIE Agroforestry trial (Elias de Melo) has been equipped to monitor coffee canopy temperature and microclimate according to Shade types (MSc. of Maxime Soma, PhD of Rémi Vezy).