Table 2: Average morphospecies richnessa for each sampling area for three combinations of sampling periods, values, and listing of averages that were significantly different. (a) Combined captures of both methodsb. (b) Captures from pitfalls only. (c) Captures from sweep-netting only.
(a) Combined captures of both methodsb

Sampling periodsEPEAWPWA value and probabilityc

All four periods93.073.596.587.05.9 < 0.02

Three periods in 200796.077.799.391.32.7 > 0.10
Differencesd EP & WP > EA (0.01); WA > EA (0.05)

Both summer periods86.061.095.075.022.2 < 0.015
Differencesd WP > EA (0.01); WP > WA (0.05); EP > EA (0.05)

(b) Captures from pitfalls only

Sampling periodsEPEAWPWA value and probabilityc

All four periods67.551.563.560.02.5 > 0.10

Three periods in 200769.753.063.361.71.3 > 0.35

Both summer periods66.545.569.555.59.5 < 0.05
Differencesd EP & WP > EA (0.05)

(c) Captures from sweep-netting only

Sampling periodsEPEAWPWA value and probabilityc

All four periods30.525.337.029.315.9 < 0.001
Differencesd WP > EA & WA (0.01); EP & WA > EA (0.05)

Three periods in 200732.328.340.332.713.2 < 0.01
Differencesd WP > EP, EA & WA (0.01)

Both summer periods21.017.027.021.02.5 > 0.20

Richness values are averages over the specified periods. Known introduced species have been excluded.
bIf a species was captured by both methods in the same sampling area and period, it was only counted once.
values and probabilities associated with “sampling areas mean square.”
dDetermined by LSD (least significant difference) with the probabilities shown.