Department of Architecture and Civil Engineering

Contact details

Room: 6E 3.1

Rebecca Ellis

Key biogeochemical processes at the sediment-water interface, including decomposition of precipitated algal matter and bio-irrigation, have been shown via certain studies to have a significant influence on sediment-water oxygen (O2) uptake. Yet this component of water- column O2 dynamics is still frequently overlooked in assessments of O2 budgets. This study focuses on elucidating and quantifying the influence of algal blooms and subsequent precipitation to the sediment on total O2 consumption by the sediment.

The main objective of this project is to comprehend in situ dissolved O2 dynamics, with aims to improve understanding of seasonality in benthic-pelagic processes in a coastal environment. In essence, this project will provide a comprehensive analysis of the water column O2 budget, with particular focus on the influence of seasonal algal blooms and sedimentary biochemical processes off the coast of Plymouth on sediment O2 uptake. Results will fill a gap in the existing historical (50+ year) dataset, which has up to now focused largely on water-column chemistry and ecology, to provide a comprehensive overview of marine O2 and other biogeochemical cycling. Supporting laboratory experiments focused on the influence of bio-irrigation on sediment O2 uptake will be performed.