Relative abundances of different Syndiniales groups from surface water samples collected at the Martha's Vineyard Coastal Observatory (MVCO) monthly or bimonthly between 2013 and 2021

The diversity, persistence, and relative abundance of Syndiniales parasite taxa at the Martha's Vineyard Coastal Observatory (MVCO) were examined in surface water samples collected approximately monthly or bimonthly between 2013 and 2021. V4 amplicons from extracted DNA were amplified, sequenced (MiSeq), and taxonomically identified. The relative abundances of different Syndiniales groups and clades were determined and compared to identify the dominant taxa, when they occurred, and how they differed from studies in other marine regions.