TheShannon-Weaverindexofdiversity(H n ’)inLakeLicheñskie ranged from 1.03 to 3.06 at a mean of 2.23 (Fig. 3), while that of biomass (H b ’) fluctuatedfrom 0.94 to 3.38 (mean 2.52). In turn, H n ’ in LakeŒlesiñskie ranged from 0.37 to 3.20 at a mean of