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Table II

Mean abundance and species richness per log for various arthropod taxa for the three different sampling periods. Data are pooled across the three site types. Numbers in brackets are standard errors. For significant taxa (bold), numbers with the same letter are not significantly different at p = 0.05.

Taxon Abundance Richness


May–Jul Jul–Aug Aug–Sep p May–Jul Jul–Aug Aug–Sep p
All arthropods 33.3 (5.0) 28.8 (3.7) 33.5 (5.8) 0.743 12.5a (1.0) 9.6b (0.6) 9.5b (0.8) 0.029
Collembola 14.8 (3.2) 9.3 (1.8) 16.4 (5.3) 0.389 3.7 (0.4) 3.0 (0.3) 2.8 (0.3) 0.091
Acarina 8.8 (1.8) 12.7 (2.5) 9.1 (2.3) 0.319 2.4ab (0.3) 2.7a (0.2) 1.9b (0.2) 0.050
Araneida 2.2a (0.5) 0.9b (0.3) 0.3b (0.1) 0.001 1.5a (0.3) 0.7b (0.2) 0.3b (0.1) 0.001
Coleoptera 2.2 (1.3) 0.5 (0.2) 0.2 (0.1) 0.157 0.9a (0.3) 0.3b (0.1) 0.3b (0.1) 0.047
Diptera 2.3a (0.4) 3.5a (0.5) 5.3b (0.8) 0.000 1.5a (0.2) 1.8ab (0.3) 2.5b (0.3) 0.020