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Curr Microbiol (2016) 73:595601
DOI 10.1007/s00284-016-1099-4
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Web End = Response of Soil Fungi Community Structure to Salt Vegetation
Succession in the Yellow River Delta
Yan-yun Wang1 Du-fa Guo1
Received: 27 January 2016 / Accepted: 13 June 2016 / Published online: 23 July 2016 Springer Science+Business Media New York 2016
Abstract High-throughput sequencing technology was used to reveal the composition and distribution of fungal community structure in the Yellow River Delta under bare land and four kinds of halophyte vegetation (saline seep-weed, Angiospermae, Imperata and Apocynum venetum [A. venetum]). The results showed that the soil quality continuously improved with the succession of salt vegetation types. The soil fungi richness of mild-salt communities (Imperata and A. venetum) was relatively higher, with Shannon index values of 5.21 and 5.84, respectively. The soil fungi richness of severe-salt-tolerant communities (saline seepweed, Angiospermae) was relatively lower, with Shannon index values of 4.64 and 4.66, respectively. The UniFrac metric values ranged from 0.48 to 0.67 when the vegetation was in different succession stages. A total of 60,174 valid sequences were obtained for the ve vegetation types, and they were classied into Ascomycota, Basidiomycota, Chytridiomycota, Glomeromycota and Mucoromycotina. Ascomycota had the greatest advantage among plant communities of Imperata and A. venetum, as indicated by relative abundances of 2.69 and 69.97 %, respectively. Basidiomycota had the greatest advantage among mild-salt communities of saline seepweed and Angiospermae, with relative abundances of 9.43 and 6.64 %, respectively. Soil physical and chemical properties were correlated with the distribution of the fungi, and Mucor was signicantly correlated with soil moisture (r = 0.985;
P \ 0.01). Soil quality, salt vegetation and soil fungi were inuenced by each other.
Introduction
The Yellow River Delta in northern Shandong Province is the youngest wetland ecosystem in the warm-temperate zone in China. The Yellow River Delta is unique among wetlands in that it is the only original ecological vegetation area with protective value among Chinas three major deltas. In 1992, the National Nature Reserve of the Yellow River Delta was established, making it the largest estuarine delta nature reserve in China. A delta is one of the most representative examples of an estuarine wetland ecosystem in the world. However, the ecological environment of the Yellow River Delta...