Bacterial-phytoplankton interactions in a coastal Mediterranean area affected by algal blooms (Syracuse Gulf, Ionian Sea)

In order to understand bacterial-phytoplankton interactions in harbor environments, trophic conditions (nutrient, chlorophyll, organic matter), microbial enzyme activities and phytoplankton dynamics were studied seasonally from September 2018 to August 2019 in the Syracuse Gulf (Ionian Sea), a Mediterranean area subject to algal blooms. During spring, dinoflagellate bloom was coupled with high microbial activity rates; these actively recycled nutrients, sustaining phytoplankton growth.