Journal of Dali University ›› 2022, Vol. 7 ›› Issue (12): 96-100.

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The Spatial Distribution Pattern of Nematode-Trapping Fungi in Dayingjiang River

  

  1. (1. Institute of Eastern-Himalaya Biodiversity Research, Dali,Yunnan 671003, China; 2.The Key Laboratory of Yunnan Education Department on Erhai Catchment Conservation and Sustainable Development, Dali, Yunnan 671003, China)

  • Received:2021-05-26 Online:2022-12-15 Published:2022-12-15

Abstract:

To explore the distribution patterns of Nematode-Trapping Fungi (NTF) in the upper and lower reaches of the watershed, Dayingjiang River was chosen as the study area, 30 samples of aquatic sediment and riverbank terrestrial soil were collected from the upper, middle and lower reaches of the Dayingjiang River. Isolated NTF by bait plate method, combined with morphological and molecular biology methods to identify the resulting strains. A total of 19 NTF strains belong to 1 genus and 9 species were identified. The results display that the occurrence frequency and diversity index of NTF in the Dayingjiang River is the highest in lower reaches, followed by the middle and upper reaches. Of these, Arthrobotrys oligospora is distributed only in the upper reaches, A.eudermata is distributed only in the middle reaches, A. thaumasium, A. sinensis, A. rutgeriense and A. conoides are distributed only in the lower reaches. The results show that there are distribution differences in the upper and lower reaches of the watershed, and the convergence of water flow is one of the important driving factors for this distribution difference. The lower reaches of the watershed may be the collection place of microbial communities.

Key words:

microbial distribution pattern, microbial diversity, convergence, environmental heterogeneity

CLC Number: