3.3 Biodiversity characteristics of macroinvertebrates
The overall distribution structure of the FFGs of macroinvertebrates in
the Jingui River in dry season showed a higher abundance than that in
the wet season and normal season (Fig. 2a). The species spanning five
FFGs (FC, GC, PR, SC, and SH), were found in this survey.
Fig. 2 shows the variation in abundance and biomass of the five FFGs
throughout the survey. As it demonstrated, all five FFGs fluctuated
apparently with the season changes in abundance (Fig. 2a). SH showed the
least seasonal variability and presented an increase in biomass in all
three seasons. In contrast, GC exhibited the least abundance in normal
season and most abundance in wet season; while SC, PR, and FC showed the
most abundance in dry season and the least in normal season.
On the other hand, the biomass displayed different relative patterns in
FFGs (Fig. 2b). The biomass of GC was comparatively high, with the
lowest value in wet season and a significantly higher value in dry
season. In contrast, biomass of SC is the highest in wet season compared
with that in other seasons. In dry season, the biomass of PR displayed
the most significant value. FC and SH showed apparent seasonal
differences, and the biomass values in dry season were the highest.