Canonical correspondence analysis (CCA) of soil microbial communities and environmental indices. Acidimic: Acidimicrobiia, Acidobac: Acidobacteriia, Actinobc: Actinobacteria, Alphaprt: Alphaproteobacteria, Anaeroln: Anaerolineae, Bacteroi: Bacteroidia, Deltaprt: Deltaproteobacteria, Gammaprt: Gammaproteobacteria, Gemmatim: Gemmatimonadetes, Ignavibc: Ignavibacteria, Ktedonob: Ktedonobacteria, Planctom: Planctomycetacia, Subgroup: Subgroup_18, Thermods: Thermodesulfovibrionia, Thermole: Thermoleophilia, Verrucom: Verrucomicrobiae; Agaricom: Agaricomycetes, Chytridi: Chytridiomycetes, Dothideo: Dothideomycetes, Eurotiom: Eurotiomycetes, Leotiomc: Leotiomycetes, Mortierl: Mortierellomycetes, Sordario: Sordariomycetes, Saccharm: Saccharomycetes.