Table S1.
Mean (n=6 replicate plots) population densities (nematodes/100 cm3 soil) of free-living nematodes across dates and N fertilization treatments in 2017.
| Date | April 2017 | June 2017 | September 2017 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Treatment | 0N | 1N | 1.5N | 2N | 0N | 1N | 1.5N | 2N | 0N | 1N | 1.5N | 2N |
| Ditylenchus | 91 (48) | 154 (58) | 109 (33) | 135 (61) | 50 (37) | 147 (240) | 81 (51) | 150 (225) | 96 (38) | 124 (73) | 65 (25) | 73 (37) |
| Acrobeloides | 43 (43) | 104 (77) | 69 (31) | 98 (80) | 41 (28) | 166 (286) | 117 (54) | 109 (97) | 31 (10) | 77 (51) | 81 (24) | 68 (68) |
| Rhabditidae | 23 (18) | 62 (78) | 52 (52) | 39 (42) | 46 (23) | 62 (100) | 26 (23) | 26 (20) | 35 (39) | 16 (13) | 17 (11) | 17 (21) |
| Aphelenchoides | 59 (37) | 66 (68) | 51 (21) | 42 (8) | 22 (16) | 26 (25) | 14 (14) | 19 (21) | 34 (23) | 25 (12) | 15 (13) | 10 (7) |
| Filenchus | 26 (11) | 43 (35) | 22 (17) | 15 (21) | 22 (24) | 8 (5) | 5 (4) | 3 (3) | 27 (26) | 51 (34) | 12 (13) | 4 (6) |
| Cervidellus | 23 (23) | 51 (47) | 28 (39) | 14 (17) | 13 (25) | 42 (72) | 5 (8) | 4 (7) | 16 (13) | 23 (16) | 8 (4) | 5 (6) |
| Alaimus | 9 (10) | 7 (7) | 3 (6) | 1 (2) | 21 (18) | 7 (7) | 13 (10) | 5 (6) | 24 (16) | 15 (19) | 5 (5) | 4 (7) |
| Plectus | 14 (11) | 17 (20) | 19 (13) | 7 (12) | 4 (7) | 1 (2) | 3 (7) | 0 | 9 (9) | 2 (3) | 0 | 2 (5) |
| Clarkus | 4 (10) | 7 (12) | 2 (3) | 0 | 5 (6) | 9 (14) | 1 (3) | 0 | 10 (8) | 12 (24) | 1 (2) | 1 (2) |
| Prismatolaimus | 11 (6) | 9 (12) | 1 (3) | 0 | 3 (5) | 0 (1) | 0 | 4 (8) | 9 (13)) | 1 (3) | 1 (2) | 1 (1) |
| Aphelenchus | 3 (10) | 0 | 1 (3) | 1 (2) | 1 (1) | 6 (15) | 0 | 0 | 1 (2) | 1 (2) | 2 (3) | 1 (2) |
| Teratocephalus | 6 (9) | 1 (2) | 1 (3) | 3 (5) | 0 (1) | 1 (2) | 0 | 0 | 0 (1) | 0 | 0 | 0 |
| Seinura | 1 (1) | 0 | 3 (4) | 0 | 0 (1) | 1 (2) | 1 (3) | 3 (8) | 0 (1) | 2 (4) | 1 (2) | 0 |
| Panagrolaimidae | 1 (2) | 5 (13) | 2 (3) | 2 (5) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 (2) |
| Thonus | 3 (5) | 0 | 0 | 0 | 1 (1) | 0 | 3 (8) | 0 | 1 (3) | 2 (4) | 0 | 0 |
| Heterocephalobus | 1 (3) | 0 | 0 | 0 | 1 (3) | 1 (2) | 1 (2) | 0 | 1 (2) | 0 | 1 (1) | 0 |
| Tylencholaimus | 1 (2) | 0 | 0 | 0 | 1 (2) | 0 | 0 | 0 | 4 (6) | 0 | 0 | 0 |
| Achromadora | 3 (8) | 0 | 1 (3) | 0 | 0 (1) | 1 (1) | 0 | 0 | 0 | 0 | 0 | 0 |
| Cephalobus | 0 | 0 | 0 | 0 (1) | 1 (3) | 0 | 0 | 0 | 1 (3) | 2 (4) | 0 | 1 (1) |
| Monhysteridae | 2 (3) | 0 | 0 | 0 | 1 (2) | 0 | 0 | 0 | 1 (3) | 0 (1) | 0 | 0 |
| Diphtherophora | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 (10) | 0 | 0 |
| Diplogasteridae | 1 (2) | 1 (3) | 0 | 1 (2) | 0 (1) | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Tylenchus | 0 | 0 | 1 (3) | 0 | 2 (3) | 0 | 0 | 0 | 0 (1) | 0 | 0 | 0 |
| Pungentus | 0 (1) | 0 | 0 | 0 | 1 (2) | 0 | 2 (5) | 0 | 0 | 0 | 0 | 0 |
| Nygolaimus | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 (1) | 2 (5) | 0 | 0 |
| Acrobeles | 0 | 2 (4) | 0 | 0 | 1 (2) | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rhabdolaimus | 0 | 0 | 1 (3) | 0 | 0 | 0 | 0 | 0 | 0 (1) | 0 | 0 | 0 |
| Aporcelaimellus | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 (2) | 0 | 0 |
| Cylindrolaimus | 0 (1) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Leptonchidae | 0 (1) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Eucephalobus | 0 (1) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Chiloplacus | 0 (1) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Ecumenicus | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 (1) | 0 | 0 | 0 |
| Anguinidae | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 (1) | 0 | 0 | 0 |
| Trophic groups (nematodes/100 cm3 soil) and community structure indices | ||||||||||||
| Bacterivorous | 138 (98) | 259 (214) | 179 (45) | 165 (123) | 133 (78) | 282 (452) | 165 (56) | 148 (94) | 128 (72) | 137 (69) | 112 (29) | 98 (47) |
| Fungivorous | 180 (60) | 262 (106) | 185 (43) | 193 (68) | 96 (61) | 186 (276) | 99 (48) | 171 (242) | 162 (66) | 204 (96) | 94 (37) | 89 (44) |
| Omni+Predsa | 8 (11) | 7 (12) | 5 (4) | 0 | 6 (6) | 10 (15) | 8 (9) | 3 (8) | 12 (8) | 17 (28) | 2 (2) | 1 (2) |
| Enrichment Index | 51 (9) | 51 (10) | 55 (12) | 53 (10) | 67 (12) | 52 (11) | 46 (15) | 53 (8) | 56 (10) | 46 (4) | 45 (12) | 46 (11) |
| Structure Index | 41 (10) | 25 (15) | 23 (12) | 12 (11) | 54 (19) | 32 (14) | 29 (11) | 17 (13) | 52 (13) | 46 (10) | 21 (14) | 13 (13) |
| Channel Index | 66 (19) | 61 (27) | 50 (21) | 60 (24) | 30 (17) | 50 (21) | 54 (21) | 51 (31) | 56 (19) | 70 (18) | 58 (12) | 64 (25) |
| Shannon Diversity | 7.30 (1.11) | 5.66 (1.65) | 5.97 (0.88) | 4.66 (1.15) | 6.79 (1.15) | 6.46 (1.22) | 4.94 (1.25) | 3.99 (0.80) | 7.51 (1.92) | 7.33 (2.48) | 5.37 (1.09) | 4.67 (1.01) |
| Simpson Diversity | 5.51 (1.04) | 4.60 (1.58) | 4.72 (0.70) | 3.82 (0.98) | 5.42 (1.00) | 5.12 (1.10) | 3.91 (1.07) | 3.17 (0.73) | 5.78 (1.79) | 4.69 (1.80) | 4.24 (1.02) | 3.69 (0.84) |
Notes: Values in parentheses are standard deviations (n = 6). Taxa are arranged in order of decreasing overall abundance. aOmni + Preds = Omnivorous + predacious nematodes combined.