Effects of Land Use Patterns on the Bacterial Community Structure and Diversity of Wetland Soils in the Sanjiang Plain
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ORIGINAL PAPER
Effects of Land Use Patterns on the Bacterial Community Structure and Diversity of Wetland Soils in the Sanjiang Plain Xiaolin Guo 1 & Yongbin Zhou 1,2 Received: 28 January 2020 / Accepted: 29 July 2020 # Sociedad Chilena de la Ciencia del Suelo 2020
Abstract Changes in land use patterns can lead to changes in soil ecosystem function, and soil microbes could sensitively reflect soil quality and the evolution of different ecosystem functions. In order to study the impact of different land use patterns on microbial community structure, four typical land use patterns, including wetland (WL), meadow (MD), paddy field (Oryza sativa (OS)), and farmland (Zea mays(ZM)), were taken as research objects in Sanjiang Plain. The high-throughput sequencing technology based on bacterial 16S rRNA gene was used to study the community structure of soil bacteria and explore its relationship with soil environmental factors. For alpha diversity, it was found that soil bacterial Simpson index, Chao index, ACE index, and Shannon index in WL were the highest and lowest in OS, while no significant differences of soil bacterial diversity indices were observed among WL, ZM, and MD. The dominant bacterial groups under different land use types were Proteobacteria, Acidobacteria, Chloroflexi, Actinobacteria, and Actinobacteria, and soil bacterial community clearly differed among WL, MD, OS, and ZM. Soil water content, pH, soil organic carbon, total nitrogen, available nitrogen, total phosphorus, available phosphorus, NO3−-N, and soil moisture content had strong effects on soil bacterial community composition. In this perspective, it is well established that different land use patterns could affect microbial communities by changing soil environmental factors. Keywords Sanjiang plain . Reclamation . High-throughput sequencing . Bacterial community . Soil properties
1 Introduction Wetland, as a transitional zone from land to water, accounts for about 5~8% of the Earth’s surface area. Wetland has multiple ecological ecosystem service functions, such as maintaining the richest biodiversity and highest productivity (Zheng et al., 2013; Liu et al., 2014; Taufik et al., 2015), reducing the flooding (Davidson, 2014), controlling carbon (Davidson, 2014), nitrogen and phosphorus (Li et al., 2017; Mitsch et al., 2015) cycling and energy exchange, and purifying water quality. However, with the development of social economy, population growth, and increase of farming activities, nearly half of global wetlands have been destroyed or altered due to the human disturbances (Verones et al., 2013). * Yongbin Zhou [email protected] 1
College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China
2
College of Forestry, Shenyang Agricultural University, Shenyang 110866, China
However, it is estimated that more than half of all wetlands have disappeared, and the trend continues (IPCC 2014). The decrease of wetland area and the increase of meadow and cultivated land area caused by human activities result in signific
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