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Future HAB science: directions and challenges in a changing climate

Citation

Wells, ML and Karlson, B and Wulff, A and Kudela, R and Trick, C and Asnaghi, V and Berdalet, E and Cochlan, W and Davidson, K and De Rijcke, M and Dutkiewicz, S and Hallegraeff, G and Flynn, KJ and Legrand, C and Paerl, H and Silke, J and Suikkanen, S and Thompson, P and Trainer, VL, Future HAB science: directions and challenges in a changing climate, Harmful Algae Article 101632. ISSN 1568-9883 (2019) [Refereed Article]

Copyright Statement

Copyright 2019 Elsevier B.V

DOI: doi:10.1016/j.hal.2019.101632

Abstract

There is increasing concern that accelerating environmental change attributed to human-induced warming of the planet may substantially alter the patterns, distribution and intensity of Harmful Algal Blooms (HABs). Changes in temperature, ocean acidification, precipitation, nutrient stress or availability, and the physical structure of the water column all influence the productivity, composition, and global range of phytoplankton assemblages, but large uncertainty remains about how integration of these climate drivers might shape future HABs. Presented here are the collective deliberations from a symposium on HABs and climate change where the research challenges to understanding potential linkages between HABs and climate were considered, along with new research directions to better define these linkages. In addition to the likely effects of physical (temperature, salinity, stratification, light, changing storm intensity), chemical (nutrients, ocean acidification), and biological (grazer) drivers on microalgae (senso lato), symposium participants explored more broadly the subjects of cyanobacterial HABs, benthic HABs, HAB effects on fisheries, HAB modelling challenges, and the contributions that molecular approaches can bring to HAB studies. There was consensus that alongside traditional research, HAB scientists must set new courses of research and practices to deliver the conceptual and quantitative advances required to forecast future HAB trends. These different practices encompass laboratory and field studies, long-term observational programs, retrospectives, as well as the study of socioeconomic drivers and linkages with aquaculture and fisheries. In anticipation of growing HAB problems, research on potential mitigation strategies should be a priority. It is recommended that a substantial portion of HAB research among laboratories be directed collectively at a small sub-set of HAB species and questions in order to fast-track advances in our understanding. Climate-driven changes in coastal oceanographic and ecological systems are becoming substantial, in some cases exacerbated by localized human activities. That, combined with the slow pace of decreasing global carbon emissions, signals the urgency for HAB scientists to accelerate efforts across disciplines to provide society with the necessary insights regarding future HAB trends.

Item Details

Item Type:Refereed Article
Keywords:climate change, HAB, multi-stressor, temperature, stratification, ocean acidification, nutrients, benthic, cyanobacteria, grazing, fisheries, aquaculture, modeling, experimental strategies, new tools, observatories
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Phycology (incl. Marine Grasses)
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Aquaculture
Objective Field:Fisheries - Aquaculture not elsewhere classified
UTAS Author:Hallegraeff, G (Professor Gustaaf Hallegraeff)
ID Code:135377
Year Published:2019
Deposited By:Ecology and Biodiversity
Deposited On:2019-10-16
Last Modified:2019-11-11
Downloads:0

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