The rank-abundance curve in Figure 1 describes a lognormal distribution pattern, indicating how varied the community was. The density dependent measures showed that the study area had high diversity in all plots (Table 1). The Fisher’s alpha diversity index (α) range from 96.53 to 109.56 and the average for all plots is 102.27.
May 03, 2019 · A k-dominance plot displays the cumulative proportion abundance against the log species rank. For this type of plot, more elevated curves represent less diverse assemblages. An abundance/biomass comparison (or ABC curve) is an adaptation of the k-dominance curve where two measures of abundance are plotted: the number of individuals and biomass ...
constructing a so-called “collector’s curve” (Colwell and Coddington 1994). These plot the cumulative number of species observed (y-axis) against the cumulative number of individuals classified (x-axis). The collector’s curve is an increasing function with a slope that will decrease as more individuals are classified and as fewer species
Thus, species abundance distributions, with shallower curve, tended to be highest in diversity, while those with steeper curves were less diverse (Figure 6). Species from the riverine systems were the least diverse and ranged from α = 0.04, r = 5.83 to α = 3.5, r = 3.08 and were found at the bottom of the Renyi index curve (Figure 6 ).