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Changes in marine dinoflagellate and diatom abundance under climate change
journal contribution
posted on 2012-01-01, 00:00 authored by S Hinder, Graeme HaysGraeme Hays, M Edwards, E Roberts, A Walne, M GravenorMarine diatoms and dinoflagellates play a variety of key ecosystem roles as important primary producers (diatoms and some dinoflagellates) and grazers (some dinoflagellates). Additionally some are harmful algal bloom (HAB) species and there is widespread concern that HAB species may be increasing accompanied by major negative socio-economic impacts, including threats to human health and marine harvesting1, 2. Using 92,263 samples from the Continuous Plankton Recorder survey, we generated a 50-year (1960–2009) time series of diatom and dinoflagellate occurrence in the northeast Atlantic and North Sea. Dinoflagellates, including both HAB taxa (for example, Prorocentrum spp.) and non-HAB taxa (for example, Ceratium furca), have declined in abundance, particularly since 2006. In contrast, diatom abundance has not shown this decline with some common diatoms, including both HAB (for example, Pseudo-nitzschia spp.) and non-HAB (for example, Thalassiosira spp.) taxa, increasing in abundance. Overall these changes have led to a marked increase in the relative abundance of diatoms versus dinoflagellates. Our analyses, including Granger tests to identify criteria of causality, indicate that this switch is driven by an interaction effect of both increasing sea surface temperatures combined with increasingly windy conditions in summer.
History
Journal
Nature climate changeVolume
2Pagination
271 - 275Publisher
Nature Publishing GroupLocation
New York, N.Y.Publisher DOI
ISSN
1758-678XLanguage
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2002, Nature Publishing GroupUsage metrics
Keywords
biodiversity and ecosystemsbiological sciencesbiologyecologyoceanographyScience & TechnologyLife Sciences & BiomedicinePhysical SciencesEnvironmental SciencesEnvironmental StudiesMeteorology & Atmospheric SciencesEnvironmental Sciences & EcologyHARMFUL ALGAL BLOOMSSERIATA BACILLARIOPHYCEAEPHYTOPLANKTONAtmospheric Sciences
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