Ecology and Sustainable Development

Download PDF (5124.5 KB) PP. 1 - 24 Pub. Date: February 15, 2019

DOI: 10.22606/esd.2019.21001

• Umar Nazir Bhat^* and Anisa B. Khan
  Department of Ecology and Environmental Sciences, Pondicherry University, Puducherry, India- 605014.

Monitoring at 30 sampling sites of Dal Lake is carried out to assess its spatial-temporal heterogeneity under human pressures. P surpass critical eutrophic index (≤ 0.05 mgL^-1) while nitrate-N persist beneath it (≤ 0.5 mgL^-1). Semi-drainage hydrology recuperates basin volume. Autotrophic assimilation and biocalcification episodes drop conductivity. Anionic prevalence of HCO₃^- and Cl^- exist along Ca > Mg > Na > K cationic progression. Autochthonous sediment OM at typical < 10 C/N is the conventional nutrient source. Higher temperature and lower N:P ratio during summer develop P internal loading process. Cr, Ni and Zn exceed the sediment quality guidelines. OM enriched sediments and calcite co-precipitation curtails PTE mobility. Biomass parameters establish similar variations except species turn-over. OM immobilizes nutrients and OC provisions denitrification. Dal Lake exposed to anthro-urban intensification depends on comprehensive management interventions like National Plan for Conservation of Aquatic Ecosystems vital for insitu leniency control and lake-front improvement.

Bioconcentration, compartmentalization, eutrophication, macrophytes, remediation, sewage.

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