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https://www.selleckchem.com/ Soil samples from the intertidal zone of Daliao River, Northeast China, were collected in three seasons (autumn, L1; winter, L2; and spring, L3) to evaluate the diversity and structure of bacterial community using high-throughput sequencing. Soil physicochemical characteristics varied greatly with seasons, and the potential nitrification rates were detected in the range of 1.04-2.71 μg NO3--N·g-1 dry soil·h-1 with the highest rate in spring (L3). Soil bacterial communities also differed seasonally, and nitrogen nutrients were the important variables affecting the bacterial communities as demonstrated by distance-based redundancy analysis and Mantel tests. Proteobacteria was the predominant phylum in soils showing a descending trend from L1 to L3. Woeseia and Ignatzschineria, both affiliating with Gammaproteobacteria, were the two most dominant genera, but they exerted different seasonal variations. The predicted functional profiles revealed 6 major nitrogen cycling processes, and the functional genes in relation to denitrification process were dominant in intertidal soils.Sixty-one surface sediment samples collected from the Jiangsu Coast (JSC), East China were investigated to explore the influences, provenances and bioavailabilities of P species. Authigenic and detrital P fractions were the dominant species, accounting for 28.53% and 44.04% of the total P content, respectively. Exchangeable, Fe-bound and organic P fractions were biologically available, with an average total of 5.94 μmol/g; this value was governed by grain sizes and the organic matter and carbonate contents. Exchangeable and organic P fractions were transformed between each other, while contributing to the formation of Fe-bound and authigenic P. Phosphorus in the JSC sediments originated mainly from the Yellow River. The unique distribution pattern of P species in the JSC depends on P sources and local environments. These findings improve our understanding of the P cycle

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