| a - Between cropping systems | b - Over time | ||||
---|---|---|---|---|---|---|
 | Mo | Ro | P | 1970s | 2000s | P |
Wilcoxon Test | Â | Â | Â | Â | Â | Â |
Mean species richness | 12.59 | 14.06 | P = 0.07 | 16.56 | 9.34 | P < 0.01 |
Mean abundance | 9.56 | 8.11 | P = 0.07 | 61.5 | 20.2 | P < 0.01 |
Khi2 Test | Khi2 = 84.5 | P < 0.01 | Khi2 = 64.0 | P < 0.01 | ||
Sum of occurrences for: | Â | Â | Â | Â | Â | Â |
Generalist species | 1129 | 1154 | Â | 2180 | 1351 | Â |
Intermediate species | 777 | 485 | Â | 676 | 405 | Â |
Specialist species | 429 | 268 | Â | 344 | 99 | Â |
Total | 2959 | 2377 | Â | 3200 | 1885 | Â |