Testing for temperature acclimation of plant carbon exchange:a comment on‘Global patterns of the responses of leaf-level photosynthesis and respiration in terrestrial plants to experimental warming’by liang et al.

In a recent issue of Journal of Plant Ecology,Liang et al.(2013)use meta-analytical techniques to analyze the leaf carbon exchanges responses to experimental warming and,in part,observe that leaf dark respiration,but not photosynthesis,acclimates to the warming treatments.The authors should be commended for putting together and analyzing such a large data set.Many of the results provide fine syntheses for understanding leaf carbon exchange responses to warm-ing.However,the acclimation analyses are,in my opinion,flawed and are not appropriate for supporting their results.