Garbulsky M.F., Peñuelas J., Papale D., Ardö J., Goulden M.L., Kiely G., Richardson A.D., Rotenberg E., Veenendaal E.M., Filella I. (2010) Patterns and controls of the variability of radiation use efficiency and primary productivity across terrestrial ecosystems. Global Ecology and Biogeography. 19: 253-267.EnllaçDoi: 10.1111/j.1466-8238.2009.00504.x
Aim: The controls of gross radiation use efficiency (RUE), the ratio between gross primary productivity (GPP) and the radiation intercepted by terrestrial vegetation, and its spatial and temporal variation are not yet fully understood. Our objectives were to analyse and synthesize the spatial variability of GPP and the spatial and temporal variability of RUE and its climatic controls for a wide range of vegetation types. Location: A global range of sites from tundra to rain forest. Methods: We analysed a global dataset on photosynthetic uptake and climatic variables from 35 eddy covariance (EC) flux sites spanning between 100 and 2200 mm mean annual rainfall and between -13 and 26°C mean annual temperature. RUE was calculated from the data provided by EC flux sites and remote sensing (MODIS). Results: Rainfall and actual evapotranspiration (AET) positively influenced the spatial variation of annual GPP, whereas temperature only influenced the GPP of forests. Annual and maximum RUE were also positively controlled primarily by annual rainfall. The main control parameters of the growth season variation of gross RUE varied for each ecosystem type. Overall, the ratio between actual and potential evapotranspiration and a surrogate for the energy balance explained a greater proportion of the seasonal variation of RUE than the vapour pressure deficit (VPD), AET and precipitation. Temperature was important for determining the intra-annual variability of the RUE at the coldest energy-limited sites. Main conclusions: Our analysis supports the idea that the annual functioning of vegetation that is adapted to its local environment is more constrained by water availability than by temperature. The spatial variability of annual and maximum RUE can be largely explained by annual precipitation, more than by vegetation type. The intra-annual variation of RUE was mainly linked to the energy balance and water availability along the climatic gradient. Furthermore, we showed that intra-annual variation of gross RUE is only weakly influenced by VPD and temperature, contrary to what is frequently assumed. Our results provide a better understanding of the spatial and temporal controls of the RUE and thus could lead to a better estimation of ecosystem carbon fixation and better modelling. © 2009 Blackwell Publishing Ltd.
Peñuelas J, Gracia C, Filella I, Jump A, Carnicer J, Coll M, Lloret F, Curiel J, Estiarte M, Rutishauser T, Ogaya R, LLusiá J, Sardans J (2010) Intégration des effets du changement climatique sur les forêts méditerranéennes : observation, expérimentation, modélisation et gestion p. 351. Introducing the climate change effects on Mediterranean forest ecosystems: observation, experimentation, simul ation and management . Forêt Méditerranéenne XXXI, nº 4 pp. 357. ISSN 0245-484X.
Garbulsky M, Peñuelas J, Filella I (2010) Photochemical Reflectance Index (PRI) can estimate seasonal variations of ecosystem gross radiation use efficiency for different forest types. 1st Symposium The Terrestrial biosphere in the Earth System. Hamburg, February 9-11. pp. 37-38 proceedings.
Pandolfi M, Querol X, Alastuey X, Jimenez JL, Pey J, Cusack M, Reche C, Amato F, Artiñano B, Baldasano JM, Burkhart J, Hansel A, Jorba O, Lorente J, Mohr C, Moreno T, Nemitz E, Peñuelas J, Seco R, Filella I, Llusià J, Sicard M, Viana M (2010) An Overview of the DAURE Campaign: Aerosols Emissions and Evolution in the Western Mediterranean Basin. Geophysical Research Abstracts. Vol. 12, EGU2010-1202General Assembly proceedings.
Peñuelas J, Filella I, Estiarte M, Rutishuaser T, Garbulsky M (2010) Phenology in the local, regional and global ecology of climate change. Phenology 2010: Climate change impacts and adaptations. Trinity College Dublin. pp 1 proceedings.
Peñuelas J, Filella I, Estiarte M, Ogaya R, Llusià J, Sardans J, Jump A, Curiel J, Carnicer J, Rutishauser T, Rico L, Keenan T, Garbulsky M, Coll M, Díaz de Quijano M, Seco R, Rivas-Ubach A, Silva J, Boada M, Stefanescu C, Lloret F, Terradas J (2010) Impactes, vulnerabilitat i retroalimentacions climàtiques als ecosistemes terrestres catalans. A: Llebot E. (ed). Segon informe sobre el canvi climàtic a Catalunya. Institut d'Estudis Catalans i Generalitat de Catalunya. pp. 373-407.
Josep Peñuelas, Romà Ogaya, Pep Canadell, Ulo Niinemets, Estiarte M, Coll M, Carnicer J, Greenberg J, Guenther A, Garbulsky M, Filella I (2010) Photosynthesis and productivity in a changing world: the assessment of terrestrial CO2 sinks. The 15th International Congress of Photosynthesis, International Society of Photosynthesis Research (ISPR), August 22-27 2010. Beijing China pp. 326-327 -proceedings.
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