Hydrophone recording the reef environment. ©Túlio Freire Xavier.

To achieve this, recordings will be conducted using a hydrophone and digital recorder placed at various sites subjected to different degrees of anthropogenic noise within the Costa dos Corais Marine Protected Area. Simultaneously, we will monitor and document anthropogenic activities occurring during the recordings, such as boat traffic, tourism-related activities, and coastal development, to establish direct correlations between human actions and noise levels. These recordings will be analyzed to quantify noise levels using metrics such as Power Spectrum Density (PSD) and the Acoustic Complexity Index (ACI). Spatial patterns of noise pollution will be correlated with human activities and environmental variables to identify hotspots of noise impact. Furthermore, the relationship between noise levels and the presence of key acoustic species, such as fishes and invertebrates, will be assessed to better understand the ecological consequences of noise pollution. The results will also inform the development of mitigation strategies, including stakeholder engagement through workshops, educational events, and scientific presentations. These activities aim to raise awareness and guide local and regional policies toward the preservation of marine soundscapes and the health of coral reef ecosystems.