The 2023 Bloom of Tripos muelleri and Monitoring Response

A nearshore Gulf of Maine water sample full of Tripos muelleri collected in May 2023

Photo credit: Joe Vallino / Marine Biological Laboratory

Overview

A highly unusual algal bloom of the dinoflagellate Tripos muelleri, hereafter referred to as Tripos, dominated the western Gulf of Maine from April to August of 2023. A network of collaborators throughout the region attempted to coordinate monitoring of the bloom to track its extent and progression, as well as its impacts on fisheries and the ecosystem. This report provides a narrative overview of the bloom event and monitoring response which culminated in a UNH and NERACOOS sponsored seminar and workshop in January 2024. The workshop strived to advance an understanding of the bloom, to evaluate the monitoring response, and recommend improvements for the coastal ocean observation system.

Tripos Workshop Report

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