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The effect of seasonality in phytoplankton community composition on CO2 uptake on the Scotian Shelf


Craig, SE and Thomas, H and Jones, CT and Li, WKW and Greenan, BJW and Shadwick, EH and Burt, WJ, The effect of seasonality in phytoplankton community composition on CO2 uptake on the Scotian Shelf, Journal of Marine Systems, 147 pp. 52-60. ISSN 0924-7963 (2015) [Refereed Article]

Copyright Statement

Copyright 2014 Elsevier B.V.

DOI: doi:10.1016/j.jmarsys.2014.07.006


We characterise seasonal patterns in phytoplankton community composition on the Scotian Shelf, northwest Atlantic Ocean, through a study of the numerical abundance of different cell sizes pico-, nano- and microphytoplankton. Cell abundances of each size class were converted to cellular carbon and their seasonal patterns compared with the partial pressure of carbon dioxide (pCO2) also measured at the study site. We observed a persistent drawdown of CO2 throughout the summer months, despite nutrient depleted conditions and apparent low biomass suggested by the chlorophyll record. This drawdown was associated with a summertime phytoplankton assemblage numerically dominated by small phytoplankton that reach their peak abundance during this period. It was found that phytoplankton carbon during this period accounted for approximately 10% of spring bloom phytoplankton carbon and pointed to the importance role that small cells play in annual CO2 uptake.

Item Details

Item Type:Refereed Article
Keywords:CO2 drawdown, small phytoplankton, cell abundance
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Community ecology (excl. invasive species ecology)
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Marine biodiversity
UTAS Author:Shadwick, EH (Dr Elizabeth Shadwick)
ID Code:106876
Year Published:2015
Web of Science® Times Cited:5
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2016-02-24
Last Modified:2017-11-06

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