Survey of Colonial Green Algae from Four Perennial Tanks of Haliyal Taluk-Karnataka State

Abstract

The paper deals with thirty-six taxa of colonial green algae recorded from four perennial tanks of Haliyal Taluk. These taxa are distributed over six Families, Chlorellaceae (8), Coelastraceae (3), Hydrodictyaceae (4), Oocystaceae (3), Radiococcaceae (3) and Scenedesmaceae (15). Pachycladella zatoriensis (Bedn. & Mroz. -Webb) Kom., a rare alga was recorded in this survey. Principal component analysis (PCA) revealed, water spread area as an important morphometric parameter in the distribution of colonial green algae. PCA also recognised, the ratio of nitrates and phosphates, as a limiting nutrient concentration gradient in determining the distribution of colonial green algae, values pitched near 25, positively influences the distribution of these taxa. Shannon diversity index also validated PCA, indicating comparative higher distribution in Neelavani tank followed by Mothikeri.