ANOVA	Analysis of variance
BLAST	Basic Local Alignment Search Tool
bp	Base pair (in DNA)
DNA	Deoxyribonucleic acid
FE-SEM	Field emission scanning electron microscopy
EDS	Energy-dispersive spectroscopy
ITS	fungal internal transcribed spacer
MCG	Miscellaneous crenarchaeotal group
OTU	Operational taxonomic unit
PCA	Principal component analysis
PCR	Polymerase chain reaction
STD	Standard deviation
Ti	in this paper, Ti-6Al-4V
TOC	Total organic carbon