Genus | Dry season | Wet season | |||
---|---|---|---|---|---|
playa | loessial plain | playa | loessial plain | ||
Trophic groups according to |
|||||
2 | 0.8 Means from four replicates. |
74.9 | 0.3 | 42.3 | |
2 | 2.7 | 24.4 | 0.3 | 07.1 | |
4 | 0.0 | 00.0 | 0.0 | 00.1 | |
2 | 0.5 | 32.3 | 0.0 | 15.5 | |
2 | 0.0 | 04.8 | 0.0 | 00.0 | |
2 | 0.0 | 02.6 | 0.0 | 00.5 | |
2 | 0.0 | 23.9 | 0.1 | 14.4 | |
1 | 0.0 | 00.0 | 0.1 | 02.9 | |
2 | 0.0 | 00.9 | 0.0 | 02.0 | |
1 | 0.0 | 03.1 | 0.0 | 00.0 | |
3 | 3.0 | 46.8 | 0.0 | 20.7 | |
2 | 0.0 | 00.0 | 0.0 | 00.1 | |
1 | 0.0 | 00.0 | 0.0 | 00.9 | |
1 | 0.0 | 01.6 | 0.0 | 00.5 | |
2 | 0.0 | 03.4 | 0.0 | 00.1 | |
1 | 0.0 | 00.0 | 0.0 | 00.1 | |
1 | 0.0 | 01.9 | 0.0 | 00.4 | |
2 | 0.0 | 00.0 | 0.0 | 01.0 | |
2 | 0.0 | 01.3 | 0.0 | 00.0 | |
2 | 0.4 | 38.2 | 0.0 | 07.8 | |
2 | 0.0 | 08.6 | 0.0 | 09.2 | |
2 | 0.0 | 00.0 | 0.0 | 00.2 | |
3 | 0.0 | 00.0 | 0.0 | 00.7 | |
2 | 0.0 | 00.0 | 0.0 | 00.1 | |
2 | 0.0 | 01.4 | 0.0 | 00.5 | |
2 | 0.0 | 00.0 | 0.0 | 00.5 | |
4 | 0.0 | 03.2 | 0.0 | 02.2 | |
4 | 0.0 | 02.5 | 0.0 | 00.7 | |
3 | 0.0 | 00.0 | 0.0 | 00.9 | |
2 | 0.0 | 01.4 | 0.0 | 01.2 | |
3 | 0.4 | 01.1 | 0.0 | 00.0 | |
3 | 0.0 | 02.1 | 0.0 | 01.4 | |
5 | 0.0 | 05.5 | 0.0 | 00.1 | |
2 | 0.0 | 00.0 | 0.0 | 01.6 | |
3 | 0.0 | 02.1 | 0.0 | 02.9 | |
3 | 0.0 | 01.3 | 0.1 | 02.8 | |
3 | 0.0 | 01.6 | 0.1 | 02.2 | |
4 | 0.0 | 00.0 | 0.0 | 00.2 | |
3 | 0.0 | 07.7 | 0.1 | 03.2 | |
2 | 0.1 | 00.6 | 0.2 | 00.4 | |
5 | 0.0 | 02.8 | 0.0 | 00.0 | |
5 | 0.0 | 01.1 | 0.0 | 02.5 | |
5 | 0.1 | 12.8 | 0.0 | 04.4 | |
4 | 0.0 | 00.5 | 0.0 | 00.0 | |
5 | 0.0 | 00.0 | 0.0 | 00.2 | |
5 | 0.0 | 03.2 | 0.0 | 06.6 | |
5 | 0.0 | 07.6 | 0.0 | 01.4 | |
4 | 0.0 | 00.7 | 0.0 | 00.0 | |
4 | 0.0 | 03.0 | 0.0 | 00.0 | |
4 | 0.0 | 06.3 | 0.0 | 00.0 | |
4 | 0.0 | 03.7 | 0.0 | 03.8 | |
5 | 0.0 | 05.4 | 0.0 | 00.0 | |
4 | 0.0 | 00.9 | 0.0 | 00.0 | |
5 | 0.0 | 00.0 | 0.0 | 00.8 | |
4 | 0.0 | 00.0 | 0.0 | 04.5 |
Index | Sampling depths (cm) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
0-10 | 10-20 | 20-30 | 30-40 | 40-50 | ||||||
Playa | Control | Playa | Control | Playa | Control | Playa | Control | Playa | Control | |
F/B Abbreviations as in |
0.25b Mean values from four replicates, different letters at each layer in a line denote significant differences as assessed by |
0.35a | 0.13a | 0.20a | 0.00b | 0.19a | 0.13a | 0.18a | 0.00b | 0.30a |
NCR | 0.88a | 0.74b | 0.92a | 0.84a | 1.00a | 0.85b | 0.90a | 0.86a | 1.00a | 0.80b |
T | 1.29b | 2.20a | 1.42b | 2.37a | 1.23b | 2.28a | 1.44b | 2.25a | 1.00b | 2.50a |
H' | 0.92b | 2.23a | 0.78b | 2.32a | 0.71b | 2.12a | 0.95b | 2.23a | 0.49b | 2.10a |
λ | 0.44a | 0.14b | 0.54a | 0.13b | 0.55a | 0.16b | 0.41a | 0.14b | 0.66a | 0.14b |
SR | 0.78b | 1.89a | 0.77b | 2.07a | 0.61b | 1.99a | 0.88b | 2.19a | 0.46b | 2.12a |
MI | 2.43a | 2.25b | 2.25b | 2.81a | 2.17b | 2.83a | 2.35b | 2.86a | 2.71a | 2.58b |
MMI | 2.43a | 2.35a | 2.25b | 2.85a | 2.48b | 2.90a | 2.39b | 2.86a | 2.71a | 2.66a |
EI | 8.25b | 34.75a | 8.33a | 14.75a | 0.00b | 11.25a | 10.50a | 15.50a | 0.00b | 22.50a |
SI | 54.50a | 41.00b | 25.00b | 70.00a | 23.00b | 71.25a | 49.50b | 73.75a | 83.25a | 62.25b |
F/B | 0.00b | 0.28a | 0.00b | 0.38a | 0.00b | 0.19a | 0.00b | 0.19a | 0.00b | 0.37a |
NCR | 1.00a | 0.82b | 1.00a | 0.73b | 1.00a | 0.84b | 1.00a | 0.85b | 1.00a | 0.78b |
T | 1.20b | 2.08a | 1.00b | 2.92a | 1.00b | 2.49a | 1.00b | 1.98a | 1.00b | 2.33a |
H' | 0.45b | 2.42a | 0.00b | 2.32a | 0.00b | 2.15a | 0.00b | 2.09a | 0.00b | 2.05a |
λ | 0.71a | 0.20b | 1.00a | 0.11b | 1.00a | 0.17b | 1.00a | 0.15b | 1.00a | 0.12b |
SR | 0.44 | 1.91 | 0.00 | 2.39 | 0.00 | 2.16 | 0.00 | 2.48 | 0.00 | 2.88 |
MI | 1.75b | 2.42a | 2.00b | 2.95a | 2.00b | 2.84a | 2.00b | 2.40a | 2.00b | 2.39a |
MMI | 2.13b | 2.47a | 2.00b | 2.93a | 2.00b | 2.85a | 2.50a | 2.46a | 2.50a | 2.53a |
EI | 40.00a | 26.00b | 0.00b | 20.25a | 0.00b | 23.50a | 0.00b | 29.25a | 0.00b | 32.50a |
SI | 0.00b | 55.00a | 0.00b | 76.75a | 0.00b | 74.75a | 0.00b | 55.25a | 0.00b | 51.75a |
Treatment | Dry season | Wet season | ||||
---|---|---|---|---|---|---|
SM SM: soil moisture; OM: soil organic matter content; EC: electrical conductivity. |
OM (%) | EC (ms cm-1) | SM (%) | OM (%) | EC (ms cm-1) | |
playa | 1.28±0.73a Means and standard deviation from four replicates, different letters at each soil layer in a column denote significant differences as assessed by |
0.25±0.05a | 2.20±1.15a | 7.16±1.70a | 0.14±0.07a | 1.97±0.63a |
loessial plain | 0.11±0.05b | 0.07±0.04b | 0.05±0.00b | 1.93±0.54b | 0.05±0.04b | 0.08±0.01b |
playa | 2.42±0.68a | 0.18±0.03a | 3.35±0.59a | 5.44±0.53a | 0.16±0.13a | 1.77±0.32a |
loessial plain | 0.09±0.03b | 0.07±0.04b | 0.05±0.00b | 1.14±0.15b | 0.04±0.03a | 0.07±0.01b |
playa | 3.08±0.95a | 0.13±0.03a | 3.03±0.75a | 6.75±0.89a | 0.14±0.07a | 2.85±0.97a |
loessial plain | 0.13±0.03b | 0.06±0.06b | 0.05±0.00b | 0.84±0.17b | 0.02±0.00b | 0.07±0.01b |
playa | 3.81±1.05a | 0.10±0.02a | 2.99±0.68a | 5.69±0.90a | 0.15±0.08a | 2.63±0.39a |
loessial plain | 0.16±0.06b | 0.03±0.02b | 0.06±0.01b | 0.80±0.17b | 0.02±0.00b | 0.06±0.00b |
playa | 1.23±1.35a | 0.04±0.04a | 1.09±0.75a | 3.47±1.65a | 0.10±0.05a | 1.83±0.80a |
loessial plain | 0.42±0.40a | 0.05±0.05a | 0.06±0.03b | 0.80±0.12b | 0.04±0.01b | 0.07±0.01b |
Index | Location (L) | Depth (D) | Season (S) | L×D | L×S | D×S | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Soil Properties | ||||||||||||
SM SM: soil moisture; OM: organic matter; EC: electrical conductivity; TN: total number of nematodes; BF: bacterivores; FF: fungivores; PP: plant-parasite nematodes; OP: omnivore-predator nematodes; F/B: fungivores/bacterivores ratio; NCR: nematode channel ratio T: trophic diversity; H’: Shannon index; λ: genus dominance; SR: species richness; MI: maturity index; MMI: modified maturity index; EI: enrichment index; SI: structure index. NS: no significant. |
139.81 | < 0.0001 | 6.36 | 0.0002 | 139.81 | < 0.0001 | 7.12 | < 0.0001 | 45.04 | < 0.0001 | 6.80 | 0.0001 |
OM | 1.16 | < 0.0001 | 4.95 | 0.0016 | 1.16 | NS | 2.72 | 0.0376 | 0.54 | NS | 1.64 | NS |
EC | 1.73 | < 0.0001 | 5.25 | 0.0011 | 1.73 | NS | 5.35 | 0.0009 | 2.02 | NS | 2.45 | NS |
Trophic Group | ||||||||||||
TN | 69.36 | < 0.0001 | 6.42 | 0.0002 | 8.88 | 0.0042 | 6.21 | 0.0003 | 7.63 | 0.0076 | 1.08 | NS |
BF | 49.67 | < 0.0001 | 4.39 | 0.0035 | 6.80 | 0.0115 | 4.17 | 0.0048 | 5.48 | 0.0226 | 1.24 | NS |
FF | 24.00 | < 0.0001 | 3.67 | 0.0097 | 4.44 | 0.0394 | 3.65 | 0.0100 | 4.22 | 0.0443 | 0.92 | NS |
PP | 36.87 | < 0.0001 | 3.63 | 0.0102 | 1.87 | NS | 3.63 | 0.0103 | 1.87 | NS | 2.10 | NS |
OP | 45.42 | < 0.0001 | 3.68 | 0.0096 | 4.22 | 0.0442 | 3.66 | 0.0099 | 4.14 | 0.0462 | 0.69 | NS |
Ecological Indices | ||||||||||||
F/B | 8.71 | 0.005 | 0.76 | NS | 0.48 | NS | 0.34 | NS | 1.19 | NS | 0.52 | NS |
NCR | 17.50 | 0.0001 | 0.66 | NS | 0.63 | NS | 0.39 | NS | 1.16 | NS | 0.63 | NS |
T | 55.27 | < 0.0001 | 0.57 | NS | 0.78 | NS | 0.51 | NS | 0.53 | NS | 0.50 | NS |
H' | 618.16 | < 0.0001 | 1.29 | NS | 22.40 | < 0.0001 | 1.69 | NS | 23.27 | < 0.0001 | 0.76 | NS |
Λ | 177.50 | < 0.0001 | 0.93 | NS | 2.82 | NS | 1.79 | NS | 20.50 | < 0.0001 | 0.41 | NS |
SR | 139.82 | < 0.0001 | 0.36 | NS | 3.39 | NS | 1.25 | NS | 8.16 | 0.0062 | 0.45 | NS |
MI | 22.25 | < 0.0001 | 1.74 | NS | 1.24 | NS | 2.71 | 0.0417 | 5.07 | 0.0292 | 1.84 | NS |
MMI | 12.18 | 0.001 | 1.27 | NS | 0.95 | NS | 2.20 | NS | 0.33 | NS | 0.51 | NS |
EI | 9.75 | 0.0032 | 1.69 | NS | 5.78 | 0.0206 | 0.41 | NS | 0.01 | NS | 0.14 | NS |
SI | 22.56 | < 0.0001 | 0.56 | NS | 1.66 | NS | 3.08 | 0.0253 | 11.82 | 0.0013 | 1.85 | NS |
Index | SM | OM | EC |
---|---|---|---|
TN Abbreviations as in |
- 0.44 Correlation coefficients significant at |
- 0.23 Correlation coefficients significant at |
- 0.51 Correlation coefficients significant at |
BF | - 0.41 Correlation coefficients significant at |
NS | - 0.48 Correlation coefficients significant at |
FF | - 0.33 Correlation coefficients significant at |
NS | - 0.37 Correlation coefficients significant at |
PP | - 0.36 Correlation coefficients significant at |
- 0.2 Correlation coefficients significant at |
- 0.44 Correlation coefficients significant at |
OP | - 0.43 Correlation coefficients significant at |
- 0.25 Correlation coefficients significant at |
- 0.48 Correlation coefficients significant at |
F/B | - 0.28 Correlation coefficients significant at |
NS | NS |
NCR | 0.36 Correlation coefficients significant at |
NS | 0.35 Correlation coefficients significant at |
T | - 0.52 Correlation coefficients significant at |
- 0.44 Correlation coefficients significant at |
- 0.58 Correlation coefficients significant at |
H' | - 0.77 Correlation coefficients significant at |
- 0.54 Correlation coefficients significant at |
- 0.78 Correlation coefficients significant at |
λ | 0.74 Correlation coefficients significant at |
0.47 Correlation coefficients significant at |
0.70 Correlation coefficients significant at |
SR | - 0.6 Correlation coefficients significant at |
- 0.57 Correlation coefficients significant at |
- 0.72 Correlation coefficients significant at |
MI | - 0.56 Correlation coefficients significant at |
- 0.42 Correlation coefficients significant at |
- 0.42 Correlation coefficients significant at |
MMI | - 0.40 Correlation coefficients significant at |
- 0.35 Correlation coefficients significant at |
- 0.32 Correlation coefficients significant at |
EI | NS | NS | - 0.39 Correlation coefficients significant at |
SI | - 0.58 Correlation coefficients significant at |
- 0.44 Correlation coefficients significant at |
- 0.47 Correlation coefficients significant at |