Abstract
In order to explore the distribution of cyanobacteria in paddy soil under different ecological conditions, the composition, diversity, and environmental drivers of soil cyanobacteria communities in rice fields from six regions of Jilin Province (China) were investigated. The results showed that the 16S amplicon high-throughput sequence detected the existence of cyanobacteria of 16 phyla, 33 orders, 60 families, and 113 genera in the soil of rice fields in Jilin Province. The dominant cyanobacteria populations in Jilin Province paddy soils comprised Cyanobium_PCC-6307, Synechocystis_PCC-6803, Planktothrix_NIVA-CYA_15, and Nodosilinea_PCC-7104. Each soil sample included a significant proportion of nitrogen-fixing filamentous cyanobacteria Anabaena and Nostoc according to microscopic analysis. The structural properties and diversity of cyanobacteria communities differed by geography, with soil pH and SOC being the main environmental drivers of cyanobacteria community structure. The alkaline soils S1, S2, and S5 displayed greater diversity than the acidic soils S3, S4, and S6, with S5 displaying the greatest cyanobacteria diversity. This research has crucial implications for developing and utilizing local cyanobacteria resources.
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