1

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

3

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

Menu Image Menu Image Menu Image Menu Image Menu Image Menu Image Menu Image
Menu
Facebook Twitter YouTube FlickR
Event

PhD pre-completion seminar: The ecology and dynamics of coral reef communities in an extreme marginal reef environment

When

location

Presented by:  Andrew Bauman, ARC Centre of Excellence for Coral Reef Studies, James Cook University

Where:  Building 19 (new Centre building) Room #106, JCU, Townsville, and video-linked to GCI Boardroom, UQ.

 When:  Tuesday Nov 27th; 12:00 – 13:00

Abstract: Central to understanding how coral reef ecosystems will cope with future global climate change is knowledge of how coral communities persist in marginal environments. Coral communities in the southern Persian Gulf already exist in a naturally extreme environment with average summer temperatures well in excess of those predicted to occur on most tropical coral reefs by 2100. However, few studies have examined key ecological processes (e.g., reproduction, recruitment and population size structure) that determine coral population dynamics in the Gulf. Furthermore, considerable changes to coral reef community structure have occurred in the southern Persian Gulf over the past two decades. Most dramatic are the apparent changes from Acropora dominated to poritids and faviids dominated communities. Despite extreme temperatures and high levels of bleaching, surveys showed that corals in the Gulf are reproductively active and continue to recruit. Reproduction was seasonal, with spawning occurring mainly in April and May just prior to summer maximum temperatures. The proportions of colonies spawning and per polyp rates of fecundity were similar to other regions. Further, the overall density of recruits (≈ 121 recruits m-2 year-1) was similar to sub-tropical reefs in the Indo-Pacific. Recruitment was highly seasonal with peak recruitment in the summer (June–August) when maximum summer temperatures can exceed 35°C. Elsewhere, survivorship and/or development of coral larvae would be severely reduced at these temperatures indicating marked capacity for local adaptation of corals in the Gulf. While corals in the Gulf appear adapted to the extreme environment, spawning and recruiting at temperatures that would inhibit these process in other regions of the world, increases in sea surface temperatures and recurrent bleaching events are having a marked effect on the population size structure of corals within the southern Gulf. Results showed that locally abundant coral species in the southern Gulf were significantly smaller, and their size structure positively skewed and more leptokurtic compared to coral populations in other parts of the Gulf, suggesting that increasing climate change will lead to persistent declines in the size of coral colonies and vulnerability to future disturbances.

Biography: Andrew is originally from the United States and obtained his bachelor’s degree in marine biology from the University of South Carolina in 1997. Shortly thereafter, he moved to Palau in Micronesia where he served as a US Peace Corps marine resource volunteer. Following his work in Palau, he attended James Cook University where he completed his master’s degree in tropical marine ecology in 2003. After hopping around the globe for another several years, back in Micronesia, the Middle East and Southeast Asia he decided to pursue his PhD at the ARC Centre of Excellence for Coral Reef Studies under the supervision of Prof Morgan Pratchett and Dr. Andrew Baird. His current research focuses on the ecology and dynamics of coral reef communities in extreme marginal reef environments, specifically reef communities in the Persian/Arabian Gulf and Gulf of Oman. He is most interested in basic processes that determine population dynamics of reef communities, including: reproduction, recruitment and colony growth, and how these processes will likely be impacted by future climate change.

Seminars

More
Australian Research Council Pandora

Partner Research Institutions

Partner Partner Partner Partner
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