Authors Contributions
B.Z. developed the concepts, designed and led the research, contributed
to data analyses and wrote the paper. Y.Z.X. and K.L. conducted all the
research work and analyses. S.H.Y. contributed to PLFA analysis. X.D.Z.
and H.B.H. contributed to amino sugar analysis. J.D.M. and Y.L.Z
contributed to NMR analysis. C.C and D.C.O. provided constructive
comments and suggestions to improve the manuscript. All the authors
contributed to the writing of the paper.