Increased blooms of a dinoflagellate in the NW Atlantic

Johns, D. G., Edwards, M., Richardson, A. and Spicer, J. I. (2003) Increased blooms of a dinoflagellate in the NW Atlantic. Marine Ecology-progress Series, 265 283-287. doi:10.3354/meps265283

Author Johns, D. G.
Edwards, M.
Richardson, A.
Spicer, J. I.
Title Increased blooms of a dinoflagellate in the NW Atlantic
Journal name Marine Ecology-progress Series   Check publisher's open access policy
ISSN 0171-8630
Publication date 2003
Sub-type Article (original research)
DOI 10.3354/meps265283
Open Access Status DOI
Volume 265
Start page 283
End page 287
Total pages 5
Place of publication Oldendorf, Germany
Publisher Inter-Research
Language eng
Abstract Sampling by the Continuous Plankton Recorder (CPR) over the NW Atlantic from 1960 to 2000 has enabled long-term studies of the larger components of the phytoplankton community, highlighting various changes, particularly during the 1990s. Analysis of an index of phytoplankton biomass, the Phytoplankton Colour Index (PCI) has revealed an increase over the past decade, most marked during the winter (December to February) months. Examination of the structure of the community using multiple linear-regression models indicates that the winter phytoplankton community composition has changed markedly in the 1990s compared to the 1960s. One phytoplankter, the dinoflagellate Ceratium arcticum (Cleve), has undergone dramatic changes in abundance during this period, with pronounced large winter blooms and decreased autumnal levels, and its contribution to the Phytoplankton Colour index values has increased significantly. Other dominant species in the phytoplankton community, both diatoms and dinoflagellates, did not show the same variations over the examined time period. It is suggested that the response of C. arcticum is probably a result of previously reported changes in stratification in the NW Atlantic, due to dynamic hydro-climatic (freshening and cooling) events.
Keyword Ecology
Marine & Freshwater Biology
long-term changes
NW Atlantic
Ceratium arcticum
Continuous Plankton Recorder
Plankton Recorder Survey
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Physical Sciences Publications
Ecology Centre Publications
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Created: Wed, 19 Sep 2007, 17:34:03 EST