Influence of local physical events on picophytoplankton spatial and temporal dynamics in South Australian continental shelf waters

Van Dongen-Vogels, V; Seymour, JR; Middleton, JF; Mitchell, JG; Seuront, L

Influence of local physical events on picophytoplankton spatial and temporal dynamics in South Australian continental shelf waters

Van Dongen-Vogels, V Seymour, JR

Middleton, JF Mitchell, JG Seuront, L

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Publication Type:: Journal Article
Citation:: Journal of Plankton Research, 2011, 33 (12), pp. 1825 - 1841
Issue Date:: 2011-12-01

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Field	Value	Language
dc.contributor.author	Van Dongen-Vogels, V	en_US
dc.contributor.author	Seymour, JR https://orcid.org/0000-0002-3745-6541	en_US
dc.contributor.author	Middleton, JF	en_US
dc.contributor.author	Mitchell, JG	en_US
dc.contributor.author	Seuront, L	en_US
dc.date.issued	2011-12-01	en_US
dc.identifier.citation	Journal of Plankton Research, 2011, 33 (12), pp. 1825 - 1841	en_US
dc.identifier.issn	0142-7873	en_US
dc.identifier.uri	http://hdl.handle.net/10453/18061
dc.description.abstract	We investigated the spacetime dynamics of picophytoplankton in South Australian continental shelf waters from February 2008 to January 2009, focusing on localized physical events. We discriminated six picophytoplankton populations by flow cytometry, including Synechococcus (SYN1, SYN2), Prochlorococcus (PROC1, PROC2) and small and large picoeukaryotes (EUKS, EUKL). Local physical events observed included downwelling and dense waters outflowing from a nearby gulf in winterearly spring 2008, upwelling in summer and early spring 2008 and eddy formation in January 2009. Each population responded differently to these events, which resulted in up to four orders of magnitude changes in their abundances. Population-specific hotspots reflected a succession of distinct dominant communities associated with the strength of upwelling events, changes in fluorescence maximum depths and local downwelling and mixing processes. The unexpected high abundances and local dominance of Prochlorococcus in summer reflected the possible influence of eastward and westward current transports and the presence of a High-Light (PROC1)- and Low-Light (PROC2)-adapted ecotypes. This study highlights the role of localized physical events in the dominance of all three picophytoplankton groups that may be critical for the high productivity of the study region, and suggests the importance of hydroclimatic forcing for inter-annual changes in picophytoplankton communities. © The Author 2011.	en_US
dc.relation.ispartof	Journal of Plankton Research	en_US
dc.relation.isbasedon	10.1093/plankt/fbr077	en_US
dc.subject.classification	Marine Biology & Hydrobiology	en_US
dc.title	Influence of local physical events on picophytoplankton spatial and temporal dynamics in South Australian continental shelf waters	en_US
dc.type	Journal Article
utslib.citation.volume	12	en_US
utslib.citation.volume	33	en_US
utslib.for	0607 Plant Biology	en_US
utslib.for	0602 Ecology	en_US
utslib.for	0608 Zoology	en_US
utslib.for	0704 Fisheries Sciences	en_US
dc.location.activity	Hong Kong
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - C3 - Climate Change Cluster
utslib.copyright.status	closed_access
pubs.issue	12	en_US
pubs.publication-status	Published	en_US
pubs.volume	33	en_US

Abstract:

We investigated the spacetime dynamics of picophytoplankton in South Australian continental shelf waters from February 2008 to January 2009, focusing on localized physical events. We discriminated six picophytoplankton populations by flow cytometry, including Synechococcus (SYN1, SYN2), Prochlorococcus (PROC1, PROC2) and small and large picoeukaryotes (EUKS, EUKL). Local physical events observed included downwelling and dense waters outflowing from a nearby gulf in winterearly spring 2008, upwelling in summer and early spring 2008 and eddy formation in January 2009. Each population responded differently to these events, which resulted in up to four orders of magnitude changes in their abundances. Population-specific hotspots reflected a succession of distinct dominant communities associated with the strength of upwelling events, changes in fluorescence maximum depths and local downwelling and mixing processes. The unexpected high abundances and local dominance of Prochlorococcus in summer reflected the possible influence of eastward and westward current transports and the presence of a High-Light (PROC1)- and Low-Light (PROC2)-adapted ecotypes. This study highlights the role of localized physical events in the dominance of all three picophytoplankton groups that may be critical for the high productivity of the study region, and suggests the importance of hydroclimatic forcing for inter-annual changes in picophytoplankton communities. © The Author 2011.

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http://hdl.handle.net/10453/18061