中文摘要：

本文系统调查了安徽省石台县仙寓山粗放经营茶园昆虫病原真菌物种多样性和生态位特征。结果表明,在植被单一、干扰较多的茶园,昆虫病原真菌种群结构较为单一。共采集到116株标本,其中优势种群为环链棒束孢、球孢白僵菌和粉棒束孢,分别占总数的32.8%、27.6%和19.8%。分析了3种优势种昆虫病原真菌的时间和营养生态位。结果表明,环链棒束孢的时间生态位最大,粉棒束孢最小;球孢白僵菌营养生态位宽度最大,粉棒束孢营养生态位宽度最小。昆虫病原真菌之间以环链棒束孢和球孢白僵菌的时间生态位重叠度最大,为0.776,环链棒束孢和粉棒束孢的营养生态位重叠度最大,为0.785。可见,粗放经营茶园中环链棒束孢发生时间长,分布范围广,生存能力强。

英文摘要：

The entomopathogenic fungi from an extensively managed tea plantation was investigated for species diversity and niche. In total, 116 samples of fungus-infected insect cadavers were collected, and lsaria cateniannulata, Beauveria bassiana and I. farinosus were found to be the dominant species, accounting for 32.8%, 27.6% and 19.8% of the relative frequency, respectively. In addition, I. cateniannulata had the widest temporal niche breadth among dominant entomopathogenic fungi, while I. farinosus had the narrowest. B. bassiana had the widest trophic niche, while L farinosus had the narrowest. L cateniannulata and B. bassiana had the biggest temporal niche overlap of 0.776, while 1. farinosus and 1. cateniannulata had the biggest trophic niche overlap of 0.785. The results suggest that 1. cateniannulata has a longer occurrence period, wider distribution and stronger survival abilities than other species.