Larval dispersal reveals regional sources and sinks in the Great Barrier Reef

Bode, Michael, Bode, Lance and Armsworth, Paul R. (2006) Larval dispersal reveals regional sources and sinks in the Great Barrier Reef. Marine Ecology-Progress Series, 308 17-25. doi:10.3354/meps308017


Author Bode, Michael
Bode, Lance
Armsworth, Paul R.
Title Larval dispersal reveals regional sources and sinks in the Great Barrier Reef
Journal name Marine Ecology-Progress Series   Check publisher's open access policy
ISSN 0171-8630
1616-1599
Publication date 2006-02
Sub-type Article (original research)
DOI 10.3354/meps308017
Open Access Status DOI
Volume 308
Start page 17
End page 25
Total pages 9
Place of publication Oldendorf, Germany
Publisher Inter-Research
Collection year 2006
Language eng
Abstract We analysed simulated connectivity patterns for reef fish larvae in the Cairns section of the Great Barrier Reef, and identified 2 key subregions that exhibit regional scale source–sink dynamics. The source and sink were separated latitudinally by a boundary at 16.1°S, with the source subregion lying to the north. Larval transport between the 2 subregions was predominantly unidirectional, from north to south. Only a few local populations, described here as ‘gateway reefs’, were able to transport larvae from the sink subregion to the source subregion and thus maintain the connectedness of the metapopulation. The northern subregion was able to persist without external larval supply, but when conditions were recruitment limited, the southern subregion depended on larval supply from the north to persist. The relative autonomy of the northern subregion, and its importance in sustaining the southern subregion, will influence the effectiveness of conservation efforts.
Keyword larval dispersal
source-sink
coral reef fish
metapopulation dynamics
Q-Index Code CX

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
AEDA Publications
Spatial Ecology Lab Publications
 
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Created: Wed, 15 Aug 2007, 08:53:13 EST