喀斯特高原山地石漠化区叶蝉群落结构及其多样性动态变化

为了探讨喀斯特石漠化治理区叶蝉群落对生态功能变动的动态响应,在中国贵州毕节撒拉溪朝营小流域按不同等级石漠化程度设置样地,并设置响应对照组,在2013-2014年5-10月每月对样地进行野外调查,系统采集叶蝉标本和在室内开展生物多样性研究,以期分析高原山地不同等级石漠化程度下叶蝉群落的时空格局,特别是对石漠化治理效果的生态学响应。结果表明,共采得叶蝉3049头,隶属11亚科53属,其中优势类群为小叶蝉亚科、角顶叶蝉亚科、大叶蝉亚科,分别占总数的44.70%、21.78%、14.66%。与对照组相比,治理区内样地叶蝉的属数、个体数都有增加,并表现出明显的季节变动,在7月、8月物种丰富度指数最高;随着石漠化治理的深入,叶蝉种数、个体数呈增加趋势。总体上,石漠化等级与叶蝉群落结构特征指数呈现显著的负相关,石漠化等级越低,叶蝉的Shannon-Wiener多样性指数和Margale丰富度指数越大。各等级石漠化样地的Pieluo均匀度指数与优势度指数呈现反向耦合。

The community structure and its diversity dynamic change of Cicadellidae in the karst plateau mountainous rocky desertification areas

In order to study the dynamic response of Cicadellidae community to ecological function recovery, different sample plots and response comparison groups were set based on rocky desertification grades in Salaxi Chaoying small basin, Bijie. The sample plots and Cicadellidae species were surveyed and identified indoor from May to October of 2013-2014, aimed at researching the spatial and temporal pattern of Cicadellidae community in different rocky desertification grades, especially the ecological response of rocky desertification control effect. The results show that there are 3049 species of Cicadellidae, belonging to 11 subfamily and 53 genera. The dominant communities are Typhlocybinae, Deltocephalinae and Cicadellinae, accounting for 44.70%, 21.78% and 14.66% of the total number, respectively. Compared with the comparison groups, the genera and individual number of Cicadellidae have increased in rocky desertification control areasand showed the seasonal variation, especially in July and August. With the rocky desertification control further going on, the number of species and individual will increase. In the whole, the rocky desertification grade and structure characteristics index of Cicadellida community show a significant negative correlation: the more light the rocky desertification grade, the larger the Shannon-Wiener diversity and Margale richness indexes. The Pieluo evenness index is contrary to dominance index in trend in sample plots of different rocky desertification grades.