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Spatial Landscape Analysis of Disturbance Regimes in Nagarjunasagar-Srisailam Tiger Reserve, India

S. Sudeesh,, C. Sudhakar Reddy

Abstract


Landscape level assessment is one of the best methods to understand the conservation threat caused by humans. In the present study Nagarjunasagar-Srisailam, the largest Tiger Reserve of India has been selected to analyse disturbance regimes using spatial landscape modelling. The spatial information of vegetation type and land cover, fire frequency, disturbance sources, habitat fragmentation and other landscape parameters were used as inputs for characterisation of disturbance regimes in Nagarjunasagar-Srisailam Tiger Reserve (NSTR). The fragmentation maps show relatively low fragmentation in the dry deciduous forests. The patchiness analysis indicates that total number of forest type patches in NSTR as 3514. The mean patch size of Bamboo forest is of 341.5 ha followed by Dry Deciduous forest (331.8 ha), Grassland (202.1 ha), Moist Deciduous forest (63.3 ha), Savannah (45.4 ha), Scrub (45.9 ha) and Riverine forest (26.3 ha). The disturbance index map reveals that 13.8 % area is under high disturbance category. The study demonstrates the potential of remote Sensing and GIS techniques in assessing the anthropogenic disturbances and conservation threat at landscape level.

Keywords


Landscape, Patch, Fragmentation, Disturbance Index, Tiger Reserve, India

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