Title: A comparison of computer model and eddy correlation system
Supervisors:Prof. Peter Ralph (C3), Dr. Andy Steven (CSIRO)
PhD conferred: 2015
Seagrass meadows play a range of vital roles including primary producer, CO2 sink or source, a nursery ground for commercial fishes and invertebrates, a food source for marine animals (i.e. sea turtle, fishes, and dugong) and a stabiliser for coastal sediments. To investigate the CO2 and O2 flux in seagrass meadows a range of instruments and methods have been developed. Current methods include CO2 flux vertical tubes, CO2 and O2 flux chambers and whilst they are all effective they disturb the natural environment (e.g. sediment and natural hydrodynamics). Recently, a novel non-invasive in situ system using the eddy-correlation technique has been developed to measure the CO2 flux in terrestrial environments and O2 flux system for aquatic habitats. This technique relies on the simultaneous measurement on two parameters at the same point, such as vertical velocity and oxygen concentration using an Acoustic Doppler Velocimeter and oxygen microsensor. The reliability of eddy correlation system for O2 flux measurement in seagrass meadows needs to be considered. Here, the data collection and computer models on O2 flux will be used to determine the reliability of the eddy correlation system.
- To determine the reliability of eddy correlation system for O2 flux measurement in seagrass meadows
- To predict O2 flux in seagrass meadow as well as O2 flow from seagrass leaf blades using computer modelling