Rebekah Newstead

Photograph of Rebekah Newstead

Biography

I am studying at the School of Ocean Sciences for a NERC funded PhD investigating the feeding ecology of mesozooplankton from the Amundsen Sea Polynya (AP), Antarctica under the supervision of Dr Stephanie Wilson, Dr Luis Giminez and Dr Simon Creer. Before this I completed a BSc in Marine Biology at Bangor University, graduating with a First Class degree in 2012. My research interests involve marine ecology and biological oceanography, and through my Ph.D, using genetic techniques as a tool investigate the role of biology in ecological function.

Before deciding to embark on a research career I was fortunate enough to work as a diving instructor in a handful of warm water, tropical locations. During this time an exposure to marine conservation issues drove me to study Marine Biology at Bangor. And whilst the waters may not be tropical the easy access to the wonderful coastal and mountain landscapes on the doorstep have fulfilled my enjoyment of the outdoors through hiking, fell running and triathlons whilst I have been studying here.

Research

I am currently working on my PhD investigating the feeding ecology of mesozooplankton from the Amundsen Sea Polynya (AP), Antarctica.

Polynyas are seasonally recurring areas of open water surrounded by sea ice. They are a foci for energy and nutrient transfer between the atmosphere, the polar surface ocean and the deep sea. The remote Amundsen Sea Polynya is on average, the most productive per m-2 in Antarctica.

The mesozooplankton of Antarctic marine ecosystems form an important component of food web dynamics and carbon export. Understanding how the consumption of phytoplankton is divided between the dominant grazers will be important in determining carbon export through the food web and the transport of carbon to depth.

To quantify the magnitude of mesozooplankton feeding within the AP gut chlorophyll has been extracted from samples collected during the ASPIRE research cruise. These results are compared with the physical parameters of the polynya system to understand driving factors in mesozooplankton grazing. To further explore food web dynamics I am using next generation sequencing to analyse copepod and krill gut contents. I am using a metabarcoding/ metagenetic approach. DNA is extracted from samples and the DNA barcodes mass amplified before being sent to a next generation Illumina MiSeq sequencer for analysis.

Publications

Roche, RC, Monnington, JM, Newstead, RG, Sambrook, K, Griffith, K, Holt, RHF, Jenkins, SR (2014).
Recreational vessels as a vector for marine non-natives: developing biosecurity measures and managing risk through an in-water encapsulation system. Hydrobiologia 12/2014; 750(1). DOI:10.1007/s10750-014-2131-y

Sambrook K, Holt RHF, Griffith KM, Roche RC, Newstead R, Wyn G, Jenkins SR 2014
Capacity, capability and cross-border challenges associated with marine eradication programmes in Europe: the attempted eradication of an invasive non-native ascidian, Didemnum vexillum. Marine Policy 48: 51-58

PDF copies of some of these publications are available (as indicated by hyperlinks in the list) for non-commercial research and educational purposes only. You may not use the material for commercial purposes or make multiple copies without requesting permission from the copyright holder (usually the book or journal publisher).