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Perceived global increase in algal blooms is attributable to intensified monitoring and emerging bloom impacts

Environmental Studies and Forestry

Perceived global increase in algal blooms is attributable to intensified monitoring and emerging bloom impacts

G. M. Hallegraeff, D. M. Anderson, et al.

Explore the latest findings on global harmful algal blooms, revealing complex regional trends that vary dramatically from one area to another. This research, conducted by an expert team of authors, highlights intensified monitoring efforts tied to aquaculture expansion as a key factor in the perceived increase of these blooms.

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Playback language: English
Abstract
The perceived increase in global harmful algal blooms (HABs) is investigated using data from the Harmful Algae Event Database (HAEDAT) and Ocean Biodiversity Information System (OBIS) from 1985-2018. The study finds no uniform global trend in HAB frequency and distribution after adjusting for regional monitoring effort variations. Regional trends varied due to differences in bloom species, type, and impacts. Intensified monitoring, linked to aquaculture expansion, is suggested as the primary reason for the perceived increase, highlighting the need for regionally and species-specific trend analyses.
Publisher
Communications Earth & Environment
Published On
Jun 08, 2021
Authors
Gustaaf M. Hallegraeff, Donald M. Anderson, Catherine Belin, Marie-Yasmine Dechraoui Bottein, Eileen Bresnan, Mireille Chinain, Henrik Enevoldsen, Mitsunori Iwataki, Bengt Karlson, Cynthia H. McKenzie, Inés Sunesen, Grant C. Pitcher, Pieter Provoost, Anthony Richardson, Laura Schweibold, Patricia A. Tester, Vera L. Trainer, Aletta T. Yñiguez, Adriana Zingone
Tags
harmful algal blooms
global trends
aquaculture
monitoring
regional differences
species-specific analysis

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