Fig 1.
Sampling sites and surrounding environments.
The site of Jinan city and Shandong Province (a) The site of Yellow River town (b).The sampling sites and surroundings in the Yellow River town (c). The data information is obtained from Landset 8 OLI_TIRS with data identification of LC81220342021147LGN00, which is provided by Geospatial Data Cloud site, Computer Network Information Center, Chinese Academy of Sciences. (http://www.gscloud.cn).
Fig 2.
Contents of C and N fractions in the five land-use types.
Different letters on bars in each carbon fraction indicated significant differences at α = 0.05 level (Duncan test).
Table 1.
Mean values of bacterial richness and diversity indices.
Fig 3.
Taxonomic composition analysis in levels of phyla and families in the five soil types.
Bacterial composition in phyla level of all the samples (a), phylum level of the five soil types (b), family level of all the samples (c), family level of the five soil types (d).
Fig 4.
Bacterial relative abundance of main biosynthesis function (a) and the Pearson correlation analysis between OM fractions and major microbial functional genes (b). The “**” meant significance was less than 0.01, and “*” meant significance was less than 0.05.in the five soil types.
Fig 5.
Bacterial relative abundance of cytochrome c biosynthesis function in aerobic respiration based on the MetaCyc (https://metacyc.org/) metabolic pathway prediction.
Fig 6.
Proportions of C fractions and N fractions.
The (a) showed proportions of DOC, LFOC, HFOC; (b) showed proportions of MBC and other organic carbon; (c) showed proportions of DON, LFON, HFON; (d) showed proportions of MBN and other organic nitrogen.