TABLE 2.
Bacterial community alpha diversity indices across crop sequences within each season.
| 2015 Spring | 2015 Midseason | 2015 Fall | 2016 Spring | 2016Midseason | 2016Fall | |||||||
| CropSeq | Observed | Shannon | Observed | Shannon | Observed | Shannon | Observed | Shannon | Observed | Shannon | Observed | Shannon |
| C1 | 908bc | 4.32a | 762ab | 4.37a | 1264a | 5.03a | 798a | 4.13d | 1027a | 4.43a | 1024a | 4.87ab |
| C2 | 1440a | 4.76a | 1269a | 4.52a | 1313a | 4.9ab | 1102a | 4.53bcd | 1164a | 4.83a | 1157a | 4.99a |
| Ca | 1101abc | 4.34a | 837ab | 4.44a | 1276a | 4.9ab | 940a | 4.24cd | 1072a | 4.53a | 1202a | 4.97a |
| S1 | 683c | 4.46a | NA | NA | 993ab | 4.24cd | 1147a | 5.1a | 1126a | 4.34a | 916a | 4.17e |
| S2 | 919bc | 4.17a | 592b | 3.95a | 1067ab | 4.27cd | 1004a | 4.18d | 1017a | 4.07a | 1001a | 4.41de |
| S3 | 1021bc | 4.23a | 750ab | 3.95a | 986ab | 4.34cd | 947a | 4.17d | 1062a | 4.22a | 976a | 4.51cd |
| S4 | 927bc | 4.23a | 751ab | 4.02a | 794b | 4.2cd | 1013a | 4.3cd | 908a | 3.89a | 850a | 4.54bcd |
| S5 | 1152ab | 4.45a | 777ab | 4.13a | 758b | 4.06d | 1045a | 4.52cd | 762a | 4.36a | 945a | 4.48cde |
| Sa | 1285ab | 4.6a | 745ab | 4.23a | 1051ab | 4.54bc | 1082a | 4.98ab | 1144a | 4.28a | 929a | 4.4de |
| Ss | 1136ab | 4.43a | 708ab | 3.97a | 1021ab | 4.39cd | 1179a | 4.64bc | 762a | 3.63a | 1163a | 4.77abc |
| P-value | 0.003∗∗ | 0.18 | 0.06 | 0.48 | 0.01∗ | <0.001∗∗∗ | 0.83 | < 0.001*** | 0.85 | 0.43 | 0.02∗ | < 0.001*** |
Data were means of four replicates, significant values were reported at (∗) P < 0.05, (∗∗) P < 0.01, and (∗∗∗) P < 0.001. Different letters in a column indicate significant difference across crop sequences within each season at P < 0.05 according to LSD test.