应用生态学报2011，Vol.22Issue(12)：3094-3100,7.
喀斯特石漠化区不同小生境常见灌木种叶片δ13C值特征
Characteristics of foliar δ13C values of common shrub species in various microhabitats with different karst rocky desertification degrees
摘要
Abstract
By measuring the foliar δ13 C values of 5 common shrub species (Rhamnus davurica, Pyracantha fortuneana, Rubus biflorus, Zanthoxylum planispinum, and Viburnum utile) growing in various microhabitats in Wangjiazhai catchment, a typical karst desertification area in Guizhou Province , this paper studied the spatial heterogeneity of plant water use at niche scale and the response of the heterogeneity to different karst rocky desertification degrees. The foliar δ13 C values of the shrub species in the microhabitats followed the order of stony surface > stony gully > stony crevice > soil surface, and those of the majority of the species were more negative in the microhabitat soil surface than in the others. The foliar δ13 C values decreased in the sequence of V. Utile > R. Biflorus > Z. Planispinum > P. Fortuneana > R. Davurica, and the mean foliar δ13 C value of the shrubs and that of typical species in various microhabitats all increased with increasing karst rocky desertification degree, differed significantly among different microhabitats. It was suggested that with the increasing degree of karst rocky desertification, the structure and functions of karst habitats were impaired , microhabitats differentiated gradually, and drought degree increased.关键词
喀斯特石漠化/小生境/灌木/δ13C值Key words
karst rocky desertification/ microhabitat/ shrub/ δ13C values分类
资源环境引用本文复制引用
杜雪莲,王世杰,容丽..喀斯特石漠化区不同小生境常见灌木种叶片δ13C值特征[J].应用生态学报,2011,22(12):3094-3100,7.基金项目
中国科学院战略性先导科技专项(XDA05070400)、国家自然科学基金项目(30872007,40721002)、贵州省科技基金项目(黔科合J字[2009]2080)和贵州省教育厅自然科学研究项目(2010031)资助. （XDA05070400）
