Vol. 3, Issue 2 (2018)
Ecological status and conservation of Kondakarla freshwater lake, Visakhapatnam district, Andhra Pradesh, India
Author(s): B Madhavi, M Bharani, PS Raja Sekhar
Abstract: Studies on water quality, habitat conditions and aquatic vegetation were assessed between December, 2014 and January, 2017 to know the present ecological status and state of environment of Kondakarla lake. Habitat of the lake environments were distributed into: (i) wet meadows; (ii) littoral shallow waters ;(iii) limnetic open waters and (iv) euphotic lake bed areas. Aquatic vegetation was classified into: (a) emergent forms; (b) floating leaved; (c) submerged; and (d) free-floating hydrophytes.A total of 24 aquatic plants consisting: 4-species emergent forms; 5-species floating leaved; 7-species submerged macrophytes and 8-species free-floating hydrophytes were enumerated from lake habitats. Among these, the submerged and free floating hydrophytes were the dominant group (63.0%) rather emergent and floating leaved category (37.0%).The phosphates(P) were recorded in highest amounts (15-40 mg/l) and nitrates (N) were shown in lowest ranges (2.2 to4.3 mg/l) in lake waters. The ecological status indicate that lake environments are at advanced stages of eutrophication due to changes in water quality, composition of aquatic communities and degradation of habitats. Conservation strategies have been formulated for restoration of Kondakarla lake ecosystem.