[29]REICHSTEIN M,TENHUNEN J D,ROUPSARD O,et al.Ecosystem respiration in two Mediterranean evergreen Holm Oak forests:drought effects and decomposition dynamics[J].Functional Ecology,2002,16(1):27-39. [30]ZHOU Sha,YU Bofu,HUANG Yuefei,et al.The effect of vapor pressure deficit on water us...
I looked around and finally spotted David,who was standing by himself off to the side by a fence.He was small for ten years old.His usual big toothy smile was absent today.I walked over and asked him why he wasn't with the other children.He hesitated and then said he ha...