CAJ | 학술논문

以植物叶片δ13C值为植物水分利用效率的指示值，通过研究一个片断化森林方位对常绿乔木幼树叶片δ13C值的影响以及对各样线上从林缘到林内不同取样点植物叶片δ13C值的影响，探讨了片断化森林方位对植物长期水分利用效率边缘效应的影响。研究结果显示：城子龙山林常绿乔木幼树叶片δ13C值的范围为-35.32‰～-27.6‰，平均值为-31.601‰±0.148‰；城子龙山林不同方位样线上叶片δ13C值之间存在显著差异，其中，城子西样线叶片δ13C的平均值高于城子北和城子东样线叶片δ13C平均值；在距林缘0～10 m处，东、西、南、北四方位叶片δ13C值差异极显著，而在距林缘20～30 m，55～65 m和95～105 m处则差异不显著。这表明：对该研究地点的常绿乔木幼树而言，东、西、南、北4方位相比，边缘的产生对西面植物水分利用效率的影响最大，而北面则最小；方位对植物水分利用效率影响的范围至少进入林内约10 m；方位对边缘效应的影响的确存在，研究边缘效应时方位的影响不容忽视。
이식물협편δ13C치위식물수분이용효솔적지시치，통과연구일개편단화삼림방위대상록교목유수협편δ13C치적영향이급대각양선상종림연도림내불동취양점식물협편δ13C치적영향，탐토료편단화삼림방위대식물장기수분이용효솔변연효응적영향。연구결과현시：성자룡산림상록교목유수협편δ13C치적범위위-35.32‰～-27.6‰，평균치위-31.601‰±0.148‰；성자룡산림불동방위양선상협편δ13C치지간존재현저차이，기중，성자서양선협편δ13C적평균치고우성자북화성자동양선협편δ13C평균치；재거림연0～10 m처，동、서、남、북사방위협편δ13C치차이겁현저，이재거림연20～30 m，55～65 m화95～105 m처칙차이불현저。저표명：대해연구지점적상록교목유수이언，동、서、남、북4방위상비，변연적산생대서면식물수분이용효솔적영향최대，이북면칙최소；방위대식물수분이용효솔영향적범위지소진입림내약10 m；방위대변연효응적영향적학존재，연구변연효응시방위적영향불용홀시。
Using foliar δ13C 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 rainforest in Xishuangbanna, Yunnan. In the edge transects, foliar δ13C value ranged from -35.32‰ to -27.6‰, averaging -31.6‰±0.15‰. There were significant differences between the average foliar δ13C values of the four aspects, with the western aspect higher than those of the northern and eastern aspects of the forest. At sampling areas 0-10 m from the forest edge, the foliar δ13C value differed significantly among the four aspects, however at distances of 20-30 m, 55-65 m and 95-105 m from the edge differences were no longer significant. These results indicate that the effect of forest edges on WUE was the largest in the western and the smallest in the northern aspects and that the distance of edge effects on plant water use efficiency was at least 10 m in from physical edges. Therefore we conclude that the influence of aspect should not be neglected when investigating the edge effects on plant species in fragmented forests.