Research Article

Scale Expansion of Community Investigations and Integration of the Effects of Abiotic and Biotic Processes on Maintenance of Species Diversity

Table 3

Parameters reflecting the measures of filter processes in successional-stage species pools.

Successional stage poolAEIAPMOAEMEAPLOACKVF-valueP value

Species richnessa
 Tree 5 ± 2 1 0 ± 3 9 ± 3 2 4 ± 5 3 6 ± 5 2.980.040*
 Shrub 2 1 ± 7 1 4 ± 5 2 1 ± 6 2 4 ± 9 1 9 ± 6 2.430.006**
 Herb 4 6 ± 1 0 3 0 ± 7 2 7 ± 8 2 5 ± 9 2 3 ± 5 3.150.005**
Plant density (stem·m−2)
 Tree 0 . 0 5 ± 0 . 0 1 0 . 3 8 ± 0 . 1 8 0 . 1 5 ± 0 . 0 3 0 . 3 4 ± 0 . 0 9 0 . 6 6 ± 0 . 1 7 11.700.001***
 Shrub 2 . 1 5 ± 0 . 3 4 2 . 0 8 ± 0 . 5 2 3 . 1 5 ± 0 . 4 7 2 . 5 5 ± 0 . 2 8 2 . 8 7 ± 0 . 3 9 2.460.003**
 Herb 1 5 2 . 1 ± 3 2 . 5 0 2 0 8 . 3 ± 2 8 . 7 7 2 1 5 . 2 ± 2 9 . 1 6 1 9 9 . 3 ± 3 1 . 8 2 7 2 . 0 9 ± 9 . 2 7 3.720.001***
Above-ground biomass of herb plants (kg·m−2) 1 6 1 . 6 ± 9 7 . 9 0 2 6 . 5 9 ± 8 . 7 1 3 2 . 0 1 ± 6 . 6 8 1 2 . 8 0 ± 4 . 5 1 5 0 . 5 4 ± 1 4 . 9 6 3.050.002**

aSpecies richness, plant density, and biomass are expressed as μ± s.d. Species richness is the number of plant species in the plots, and the number of different species in each successional stage for the calculation of the effect of species pools, l n 𝑌 , are 152 (AEI), 132 (APMO), 143 (AEME), 151 (APLO), and 142 (ACKV).
*, **, ***Significantly different among succession stages at α levels of 0.05, 0.01, and 0.001, respectively.