Impact assessment of severe cyclonic storm Asani on the nesting grounds of Olive Ridley turtle, Rushikulya Estuary and spit in Odisha state, India

The objective of this study is to understand the impact of cyclone Asani on the coastal dynamics and nesting grounds of Olive Ridley sea turtles in the Rushikulya Estuary and spit in Odisha. The novelty of this study is the need to understand the effects of natural disasters on the marine environment and wildlife. This study provides new and valuable data on the effects of specific cyclones on sea turtle populations and highlights the need for increased attention and protection of these important habitats. The period of shoreline change analyzed in this study was before (May 2, 2022) and after (May 17, 2022) the impact of cyclone Asani. Multi-temporal Sentinel 2A images and Digital Shoreline Analysis System were used to perform such an analysis. Field surveys were conducted using a Leica DGPS ArcPad, and group discussions with relevant stakeholders such as the fishing community, government officials, and coastal conservation guards were also undertaken. The findings of this study showed that the cyclone had a significant impact on the spit, dividing it into four smaller pieces and opening three new mouths. The spit experienced erosion and a significant reduction in length, and local fishing community reported that 15-20% of sea turtle eggs were washed away. This study highlights the severe threat to the survival of Olive Ridley sea turtles in Odisha due to changing cyclone patterns and the potential for degradation of the local ecosystem. The results of this study can aid in coastal conservation and management strategies to protect marine turtle populations in the region.

Automated summary

The objective of this study is to understand the impact of cyclone Asani on the coastal dynamics and nesting grounds of Olive Ridley sea turtles in the Rushikulya Estuary and spit in Odisha. The novelty of this study is the need to understand the effects of natural disasters on the marine environment and wildlife. This study provides new and valuable data on the effects of specific cyclones on sea turtle populations and highlights the need for increased attention and protection of these important habitats.