Table 1.
Overview and description of the 13 sampling sites in the study area of the Naban River valley within Naban River Watershed National Nature Reserve (NRWNNR).
Figure 1.
Quantitative similarity cluster analysis of the tree species at the sampling localities (site codes see Table 1), generated from the Bray-Curtis index using UPGMA through stratigraphically constrained clustering.
The dendrogram shows four subgroups clearly classified by habitat categories.
Figure 2.
Quantitative similarity cluster analysis of the longhorn beetles at the sampling localities (site codes see Table 1), generated from the Bray-Curtis index using UPGMA through stratigraphically constrained clustering.
The dendrogram shows three subgroups clearly classified by habitat categories.
Figure 3.
Number of (A) species and (B) individuals of longhorn beetles in the four subgroup produced by habitat categories.
Box and whisker plots illustrate the 5th, 25th, 50th (median), 75th, and 95th percentiles, and the means as the dashed line. Different letters indicate significant differences (P<0.05; Mann-Whitney U-Test). Small circle indicate outliners.
Figure 4.
NMS ordination of longhorn beetle assemblages at the 13 sample sites: (♦) rubber plantations; (△) grassland and shrubland; (□) rice field fallows; (•) forest.
Blue small circle means longhorn beetle species. Variables with Pearson correlation coefficient at P<0.05 are shown. Cumulative variation in the original dataset explained by ordination is 78.5% (Axis 1 = 41.0%, Axis 2 = 19.2%, Axis 3 = 18.4%, Final stress = 9.58, Final instability = 0.00001).
Figure 5.
The polynomial regression between the diversity index of trees and longhorn beetles at 13 sampling location within Naban River Watershed National Nature Reserve.
(A) Number of tree species and estimated Chao1 species richness of longhorn beetles; (B) Number of tree species and collected species richness of longhorn beetles; (C) Number of tree individuals and collected species individuals of longhorn beetles.