In the state of Pará, Brazil, a new project has been launched in 2024 to collect environmental DNA (eDNA) from mangrove ecosystems. This initiative is designed to explore critical ecological questions regarding fish community dynamics, specifically examining the roles of competition and predation in controlling fish populations, as well as understanding the factors that influence the survival of young fish. The Amazonian coastal regions, characterized by their unique marine influences, provide an ideal backdrop for this research.

The project's focus on mangrove habitats stems from their dynamic nature, where survival tactics are continually tested due to the rapidly changing conditions characterized by tidal fluctuations. During high and low tide, the environmental pressures on fish communities intensify, providing a unique opportunity to study these interactions in real-time. Summer months are particularly crucial, as competition and predation pressures peak, which could yield valuable insights into the adaptive strategies that fish employ in these environments.

By utilizing eDNA collection methods, researchers hope to gain a deeper understanding of ecological balances within mangrove ecosystems. This study not only aims to answer foundational scientific questions but also contributes to conservation efforts in these vital coastal environments, emphasizing the importance of mangrove ecosystems in maintaining biodiversity and fish population health in the Amazon.