中文摘要：

本文以广西崇左国家级自然保护区弄官山片的白头叶猴（崇左种群）为研究对象，并结合扶绥九重山片和啼遵片猴群（扶绥种群）食性研究结果，比较分析白头叶猴食物组成的区域性差异，探讨白头叶猴对喀斯特石山森林破碎化的食性适应策略。结果表明：白头叶猴2个地理种群共采食181种植物，隶属于63科129属，其中，乔木和灌木121种，藤本46种，草本13种，寄生植物1种。2个地理种群的食物种类重叠率为15．8％，崇左种群的食物多样性指数明显高于扶绥种群（4．1vs2．7），说明白头叶猴猴群可能通过拓宽食谱（即增加食物种类）来获得足够的食物，以应对栖息地破碎化和人为干扰带来的变化。崇左和扶绥2个地理种群均表现出高度的叶食性，比较发现2个地理种群的觅食部位没有明显的地域差距，可能与严重破碎化栖息地内高质量食物（如果实）极度缺乏有关。

英文摘要：

Comparative study was conducted on diet of the white-headed langurs （Trachypithecus leucocephalus） inhabiting Chongzuo and Fusui areas of Guangxi Chongzuo White-headed Langur National Nature Reserve to explore their behavioral adaptation to fragmented limestone forests. The results showed that a total of 181 plant species belonging to 129 genera from 63 families were consumed by these langurs, including 121 woody plants （trees and shrubs）, 46 lianas, 13 herbs and 1 epiphyte, respectively. These langurs shared 15.8M of total food species. Chongzuo population had a higher index of food diversity than Fusui population （4.1 vs 2.7）, indicating that langurs consumed more plant species and increased dietary diversity in responses with food scarcity. The white-headed langurs were highly folivorous. There was no significant difference in food items between two geographic populations, which is likely correlated with fruit resource shortage in fragmented limestone habitat.