Table 1. Operational taxonomic unit (OTU)-based diversity indexes in rat buccal cavity and rectum samples during decomposition.
| Sample name | Sample group | Sample region | Sample time | Raw sequences | Clean sequences | OTUs | Chao 1 | Observed Species | Shannon index |
|---|---|---|---|---|---|---|---|---|---|
| AM01 | group A | buccal cavity | alive | 44201 | 43698 | 179 | 237.83 | 123 | 2.53 |
| AM02 | group A | buccal cavity | 0 h | 25848 | 23616 | 830 | 884.56 | 599 | 5.47 |
| AM03 | group A | buccal cavity | 4 h | 58277 | 55573 | 753 | 517.39 | 308 | 4.08 |
| AM04 | group A | buccal cavity | 12 h | 40267 | 39830 | 250 | 192.63 | 133 | 2.50 |
| AM05 | group A | buccal cavity | 1 d | 51774 | 51340 | 161 | 131.09 | 77 | 1.20 |
| AM06 | group A | buccal cavity | 2 d | 52858 | 52179 | 209 | 140.05 | 103 | 3.03 |
| AM07 | group A | buccal cavity | 3 d | 39238 | 38500 | 313 | 256.44 | 167 | 3.48 |
| AM08 | group A | buccal cavity | 4 d | 32886 | 31310 | 725 | 632.90 | 512 | 5.58 |
| AM09 | group A | buccal cavity | 6 d | 52732 | 51566 | 258 | 199.56 | 114 | 2.56 |
| AA01 | group A | rectum | alive | 43810 | 42253 | 417 | 464.97 | 323 | 3.81 |
| AA02 | group A | rectum | 0 h | 38292 | 36672 | 403 | 399.37 | 346 | 4.60 |
| AA03 | group A | rectum | 4 h | 36413 | 35332 | 315 | 278.11 | 247 | 3.21 |
| AA04 | group A | rectum | 12 h | 31063 | 29971 | 323 | 271.57 | 248 | 3.78 |
| AA05 | group A | rectum | 1 d | 44670 | 43274 | 339 | 338.67 | 250 | 4.02 |
| AA06 | group A | rectum | 2 d | 61996 | 61368 | 181 | 131.04 | 104 | 1.44 |
| AA07 | group A | rectum | 3 d | 38890 | 38473 | 159 | 149.96 | 121 | 1.75 |
| AA08 | group A | rectum | 4 d | 15137 | 14982 | 99 | 148.58 | 99 | 1.52 |
| AA09 | group A | rectum | 6 d | 31587 | 31347 | 101 | 119.11 | 74 | 1.62 |
| AA10 | group A | rectum | 8 d | 59499 | 58837 | 171 | 155.33 | 127 | 1.70 |
| BM01 | group B | buccal cavity | alive | 49263 | 48589 | 199 | 149.32 | 118 | 3.05 |
| BM02 | group B | buccal cavity | 0 h | 54850 | 51060 | 994 | 827.82 | 522 | 4.98 |
| BM03 | group B | buccal cavity | 4 h | 19412 | 19034 | 195 | 172.69 | 137 | 3.35 |
| BM04 | group B | buccal cavity | 12 h | 9611 | 9201 | 393 | 375.38 | 363 | 4.89 |
| BM05 | group B | buccal cavity | 1 d | 90467 | 89315 | 295 | 190.05 | 125 | 1.89 |
| BM06 | group B | buccal cavity | 2 d | 43100 | 42579 | 196 | 181.77 | 109 | 2.18 |
| BM07 | group B | buccal cavity | 3 d | 19340 | 18706 | 262 | 263.88 | 171 | 2.99 |
| BA01 | group B | rectum | alive | 75480 | 71302 | 437 | 382.94 | 314 | 4.96 |
| BA02 | group B | rectum | 0 h | 20778 | 19587 | 307 | 287.66 | 250 | 2.79 |
| BA03 | group B | rectum | 4 h | 48171 | 45954 | 394 | 348.72 | 290 | 3.48 |
| BA04 | group B | rectum | 12 h | 48059 | 45838 | 350 | 326.03 | 259 | 2.97 |
| BA05 | group B | rectum | 1 d | 26588 | 25769 | 324 | 373.84 | 270 | 3.06 |
| BA06 | group B | rectum | 2 d | 47855 | 47275 | 211 | 171.58 | 130 | 1.31 |
| BA07 | group B | rectum | 3 d | 61768 | 60987 | 234 | 159.37 | 129 | 2.17 |