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[目的]调查洱海底泥中捕食线虫真菌生物多样性。[方法]采集洱海底泥616份,应用传统的分类鉴定方法分离、纯化和鉴定。[结果]共分离鉴定3属,22种捕食线虫真菌,其中少孢节丛孢(Arthrobotrysoligospora),弯孢节丛孢(A.musiformis)和长孢隔指孢(Dactylellaleptospora)为优势种,检出率分别为28.05%,16.04%和8.92%。通过对4个季节捕食线虫真菌多样性分析,发现夏、春和秋3季的生物多样性较丰富,多样性指数分别为2.59,2.47和2.34,冬季多样性指数比较低,为1.48。在所分离到的捕食线虫真菌中,产黏性菌网的菌种占优势(41.00%)。[结论]洱海中存在丰富的捕食线虫真菌资源,其生物多样性具有季节性变化的特点,产黏性菌网的捕食线虫真菌为洱海中捕食线虫真菌的优势种群。
[Objective] The research aimed to investigate the predation nematode fungal biodiversity in Erhai sediments. [Method] 616 sediments of Erhai Lake were collected and separated, purified and identified by traditional classification and identification methods. [Result] A total of 22 species of predacious nematode fungi were isolated and identified. Arthrobotrys oligospora, A. musiformis and Dactylella leptospora were the dominant species. Rates were 28.05%, 16.04% and 8.92% respectively. Through the analysis of the fungal diversity of predators in four seasons, it was found that the biodiversity of summer, spring and autumn was rich, the diversity indices were 2.59, 2.47 and 2.34 respectively, and the winter diversity index was relatively low at 1.48. Among the isolated predacious nematode fungi, the strains producing the sticky bacteria network predominated (41.00%). [Conclusion] There were abundant fungicides of predatory nematodes in Erhai Lake, and the biodiversity of them varied seasonally. The predacious nematode fungi producing sticky network were the predominant nematode fungi in Erhai Lake.