@article{fdi:010046254, title = {{L}ong-term transpiration change with rainfall decline in a {M}editerranean {Q}uercus ilex forest}, author = {{L}imousin, {J}. {M}. and {R}ambal, {S}. and {O}urcival, {J}. {M}. and {R}ocheteau, {A}lain and {J}offre, {R}. and {R}odriguez-{C}ortina, {R}.}, editor = {}, language = {{ENG}}, abstract = {{I}n the {M}editerranean basin, precipitation is expected to decline as a consequence of climate change. {T}he response of a {Q}uercus ilex forest in southern {F}rance to such a decline in water availability was studied using a 4-year throughfall exclusion experiment. {S}easonal courses of sap flow and leaf water potential were obtained from 2004 to 2007 and used to characterize tree water relations in a control and a dry treatment. {T}he experiment reduced the average precipitation input to the soil by 29%, and resulted in a 23% reduction in annual transpiration. {S}oil water potential was significantly lower in the dry treatment only during summer drought, but transpiration was reduced all year round even during well-watered periods. {D}espite a tight stomatal control over transpiration, whole-tree hydraulic conductance was found to be lower in the trees growing in the driest conditions. {T}his reduction in water transport capacity was observed jointly with a reduction in leaf transpiring area. {C}anopy leaf area decreased by 18% in the dry treatment as a consequence of the throughfall exclusion, which was found to validate the ecohydrological equilibrium theory.}, keywords = {drought ; ecohydrology ; hydraulic conductance ; leaf area index ; leaf water potential ; {M}editerranean evergreen forest ; {Q}uercus ilex ; throughfall exclusion ; transpiration}, booktitle = {}, journal = {{G}lobal {C}hange {B}iology}, volume = {15}, numero = {9}, pages = {2163--2175}, ISSN = {1354-1013}, year = {2009}, DOI = {10.1111/j.1365-2486.2009.01852.x}, URL = {https://www.documentation.ird.fr/hor/fdi:010046254}, }