西双版纳片断化热带雨林常绿乔木幼树水分利用效率的边缘效应研究.PDFVIP

2001,25( 1) 15 Acta Phy toecologica Sini ca X * 渠春梅　韩兴国 　苏　波　黄建辉　蒋高明 ( , 100093) D13C , 13 13 D C D C , : D13C - 35.32 - 27.6 ,- 31. 601 0. 148 ; 13 , , D C 13 13 D C D C ;010 m , 13 ,2030 , 5565 95105 : D C m m m , 4 , , ; 10 m; , D13C EDGE EFFECTS OF PLANT WATER USE EFFICIENCY INDICATED BY FOLIAR 13 D C VALUE IN A FRAGMENTED SEASONAL RAINFOREST IN XISHUANGBANNA * QU Chun-MeiHAN ing-Guo SU BoHUANG Jian-Hui and JIANG Gao-Ming (Laboratory of Quantitative Vegetation Ecology Institute of Botany the Chinese, , A cademy of Sciences, Beij ing 100093) Abstra tUsing foliar D13 C value as an indicator of plant water use efficiency WUE( ) , we tested the effects of exposure at forest edges facing each of four different aspects on evergreen tree seedling leaves in a fragmented 13 rainforest in ishuangbanna, Yunnan. In the edge transects, foliar D C value ranged from - 35. 32 to - 27.6 , averaging - 31.6 0. 15 . There were significant differences between the average foliar D13C values of the four aspects, with the western aspect higher than those of the northern and eastern aspects of the forest. 0-10 ,