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People and ecosystems

Understanding of the links between coral reef ecosystems, the goods and services they provide to people, and the wellbeing of human societies.

2

Ecosystem dynamics: past, present and future

Examining the multi-scale dynamics of reefs, from population dynamics to macroevolution

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Responding to a changing world

Advancing the fundamental understanding of the key processes underpinning reef resilience.

Coral Bleaching

Coral Bleaching

Coral Reef Studies

ARC Centre of Excellence for Coral Reef Studies
James Cook University Townsville
Queensland 4811 Australia

Phone: 61 7 4781 4000
Email: info@coralcoe.org.au

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Event

Differential bleaching susceptibility within and among scleractinian corals

When

Tuesday, 18 May 2010 3.00pm

location
ARC Centre of Excellence Conference Room, JCU (DB44).
Presenter
Dominique McCowan

ABSTRACT:

The purpose of my PhD research is to explore variation in bleaching susceptibility within and among coral species, which is the first step in understanding the capacity of species and assemblages to withstand ongoing climate change. Dire predictions about the fate of scleractinian corals typically ignore the potential for acclimation and/ or adaptation, and generally assume that all corals, especially within species, will respond similarly to climate-related increases in ocean temperatures. My experiments have already revealed large differences in the time to bleach among similar sized colonies of two common corals (Acropora nasuta and Pocillopora damicornis) collected from within the same habitat. Further experiments are planned to compare variability in bleaching susceptibility for coral populations at different latitudes and across a range of species, and also assess whether prior exposure to moderate thermal stresses (resulting in sub-lethal bleaching) increases or decreases subsequent bleaching susceptibility. This research is expected to show that individual corals vary greatly in their responses to increasing ocean temperatures. If this phenotypic plasticity in bleaching responses is due to heritable genetic variation within local populations, then this will suggest a capacity for corals to adapt, and thereby withstand moderate increases in ocean temperatures.

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Coral Reef Studies

ARC Centre of Excellence for Coral Reef Studies
James Cook University Townsville
Queensland 4811 Australia

Phone: 61 7 4781 4000
Email: info@coralcoe.org.au