Evolution & Ecology Research Centre

The role of genetic diversity in the conservation of threatened seagrass meadows

Recognising patterns of genetic diversity and connectivity is integral to understanding the mechanisms behind population declines and formulating management plans for the conservation of threatened or endangered species. Higher genetic diversity has been shown to enhance primary productivity and recovery from disturbance. This is particularly important for clonal organisms such as seagrasses, which are globally declining and rated amongst the most threatened ecosystems on earth.

Using a number of quantitative field surveys, laboratory analyses, and manipulative field experiments, my research investigates how levels of genetic diversity in a threatened, habitat-forming seagrass species can impact phenotypic variation in functional traits, as well as the ability to both withstand and recover from environmental stress. In doing this, I have been able to identify which meadows are most at risk of extinction, which genotypes are potentially the best performers under stress, and how to best ensure that transplanting and rehabilitation efforts will be successful.

The results of this research have recently been used to formally list Posidonia australis seagrass meadows as threatened under the EPBC Act for central and northern NSW populations.

See also: www.researchgate.net/profile/Suzanna_Evans/

Suzanna measuring seagrass growth rates at Kurnell, Botany Bay

Seagrass transplant experiment at St Georges Basin

 
Suzanna (middle) awarded with the 2014 SEA LIFE Conservation Fund - AMSA Award

Supervisor:

Dr. Adriana Vergés

Co-supervisors:

Associate Professor Alistair Poore

Professor Peter Steinberg

Associate Professor Elizabeth Sinclair (UWA)