Influência do balanço sedimentar nas desovas de tartarugas-de-pente (Eretmochelys imbricata)

Abstract

The hawksbill turtle (Eretmochelys imbricata) is a critically endangered species whose reproduction can be affected by coastal processes such as erosion and sediment accretion. In this context, the aim of this study was to assess the influence of the sediment balance on the spawning of this species on Cabo de São Roque beach, Rio Grande do Norte, over five reproductive seasons. To this end, the main spawning stretches were identified, the percentages of reproductive occurrences were analyzed and the rates of in situ maintenance and ex situ relocation of nests were compared. In addition, coastal erosion and deposition processes were correlated with the need to relocate nests. The methodology included systematic monitoring of nesting areas, analysis of environmental data and application of geoprocessing techniques to assess the sedimentary dynamics of the beach. The results of this study show the importance of Cabo de São Roque beach as an essential area for the reproduction of the hawksbill turtle (Eretmochelys imbricata), highlighting the direct relationship between sedimentary dynamics and the need for adaptive management. The highest concentration of nests occurred in sectors vulnerable to erosion, indicating the urgency of strategies such as relocation. The application of the maps developed demonstrates their potential for use in Marine Spatial Planning (MSP), guiding conservation actions and adaptation to climate change. The work contributes to the conservation of biodiversity (SDG 14, 15) and the promotion of actions in the face of the climate crisis (SDG 13), reinforcing the importance of projects such as the Turtles at Sea Project (APC) in the management and monitoring of the nesting areas of Cabo de São Roque beach/RN.