Diversity of soil seed banks under different vegetation types in the southeastern margin of the Tengger Desert, China

doi:10.13287/j.1001-9332.202209.009

Abstract

Abstract: To explore the dynamics and distribution of soil seed banks under different vegetation types in desert, and reveal the community succession tendency and diversity characteristics of different vegetative types, we took Populus euphratica community, Caragana intermedia community, Leymus secalinus community and Agriophyllum squarrosum community as the research objects in the southeastern margin of the Tengger Desert. Samples of 0-2 cm, 2-5 cm, 5-10 cm, and 10-20 cm soil layers were collected. We examined the characteristics of soil seed banks and their relationships with vegetation. The results showed that there were 13 plant species in the soil seed banks of the four vegetation types, belonging to 3 families and 12 genera, with the annual and biennial herbs dominated and much Chenopodiaceae species. The soil seed bank density was generally low, with an order of C. intermedia community > L. secalinus community > P. euphratica community > A. squarrosum community. The seed bank density and species richness decreased with increasing soil depth. Based on the Shannon index, Simpson index, Pielou index and Patrick richness analysis, the order of species diversity in soil seed banks was P. euphratica community > L. secalinus community > C. intermedia community > A. squarrosum community. The similarity coefficient between soil seed bank and vegetation was the highest in C. intermedia community, followed by P. euphratica community, and the lowest in P. euphratica community and L. secalinus community. On the whole, the arbor forest P. euphratica community was the most stable one, while the sandy land A. squarrosum community was the most vulnerable.

Key words: restoration ecology, soil seed bank, Tengger Desert, vegetation dynamics

SUN Yu-shuo, CHANG Xuan-xuan, ZHANG Xue, WANG Lei, QU Wen-jie, QIN Wei-chun, ZHANG Bo, NIU Jin-shuai. Diversity of soil seed banks under different vegetation types in the southeastern margin of the Tengger Desert, China[J]. Chinese Journal of Applied Ecology, 2022, 33(9): 2356-2362.

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