Phytoplankton form the foundation of marine food webs, and their diversity strongly influences ocean ecosystem health. In the Galápagos Islands, ocean currents and climate variability linked to the El Niño-Southern Oscillation (ENSO) shape these communities, driving changes in productivity and connectivity.
This study aimed to identify the main drivers of phytoplankton diversity and connectivity in the Galápagos, assessing how a full ENSO cycle affects their composition and dispersal across islands.

Water samples were collected from different islands and analyzed using molecular techniques, combined with environmental data such as temperature, salinity, and nutrient levels. Results showed that during El Niño, diversity decreased and connectivity between islands weakened, whereas during La Niña, productivity increased and species dispersal was enhanced.

ENSO acts as a key regulator of phytoplankton dynamics in the Galápagos, influencing both stability and resilience of marine ecosystems. These findings highlight the importance of continuous monitoring to anticipate climate change impacts and support the conservation of this unique marine environment.
Read the article here: https://enviromicro-journals.onlinelibrary.wiley.com/doi/10.1111/1462-2920.70146