TABLE 2.

Diversity estimators for bacteria from seven metallic surface samples exposed in Yap Trench using 16S rRNA gene sequencing.

Sample	Observed species	Good coverage	Chao1	Faith’s phylogenetic diversity	ACE	Shannon	Simpson
TA2	556	0.9987	569	57.10	573	4.33	0.78
ZAL	383	0.9987	407	34.65	407	5.25	0.92
Al5A06	241	0.9994	248	28.42	258	4.34	0.88
Al1060	197	0.9997	205	19.15	205	4.82	0.92
T2	555	0.9988	573	45.52	565	5.67	0.91
B10	366	0.9989	380	38.15	379	5.01	0.92
B30	374	0.9990	389	34.56	375	4.26	0.84

TA2, ZAL, Al5A06, Al1060, T2, B10, and B30 represented the biofilms collected from the corresponding alloy surfaces. The observed species, Chao1 and ACE, represented the species richness of each sample. The Shannon and Simpson indices of these samples revealed community diversities, and Faith’s phylogenetic diversity evaluated the evolution differences.