Utilization of mobile phone towers by birds in Mayiladuthurai Taluk, Nagapattinam district, Tamil Nadu, Southern India.

Abstract :

Populations of amphiasis are declining at rapid rate. There are several possible causes for the decline of amphibians. Existing agricultural field and village ponds have become not suitable habitats for amphibian population due to pollution Invasive plant species are widely recognized as a major threat to biodiversity and ecosystem stability. In the present study the length, width and depth were assessed to determine whether the exotic species has any negative impact on amphibian population. All the variables were found dependent on one another; The study was carried out in the selected village ponds of three districts viz., Nagapattinam, Thiruvarur and Thanjavur from June 2012 to June 2015 which were monitored monthly once to find out the diversity and density of amphibian. Visual Encounter Survey Method was adopted to estimate the amphibian population in various ponds. The biomass of the water hyacinth was employed by quadrate method. The study period was grouped into four different seasons. Among the three districts, thirty one village ponds were selected on the basis of the degrees of water hyacinth infestation. A total of 15.371, 6.598 and 7.071 acres of pond area were covered by GPS.The present article deals with the influence of area, length, width and depth of the pond and water hyacinth infestation on the amphibian density.