Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.509171
Title: Metabolic activity in intertidal sands : the role of permeability and carbon sources
Author: Zetsche, Eva-Maria
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 2009
Availability of Full Text:
Access from EThOS:
Full text unavailable from EThOS. Please try the link below.
Access from Institution:
Abstract:
This thesis set out to improve our current understanding specifically of the role of permeability and carbon sources for the metabolic functioning of permeable sands.  Sampling of an intertidal sandy sediment in a shallow estuary over a 1-yr period revealed that permeability, being influenced by natural seasonal changes in biology and environmental conditions, varied temporally.  More specifically, the extracellular polymeric substances in the sediment were proven to substantially contribute to this temporal variability.  Sediment oxygen consumption also demonstrated seasonal variation and could be related to changes in temperature and total organic carbon, but, more importantly, also to permeability. Different carbon (C) sources were shown to influence the time series station but were also identified for other parts of the estuary.  A better understanding of the sedimentary Corg pool and the Corg undergoing mineralization was furthermore obtained with the novel application of methods developed in the soil sciences comparing the δ13C of respired CO2 to that of available source material and sedimentary Corg.  Overall, the results presented here demonstrate the crucial importance of permeability and carbon sources to metabolic processes and their mediation by biological factors. This thesis highlights the importance of continued research into the complexities of these permeable sands.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.509171  DOI: Not available
Keywords: Sediment transport ; Sand ; Ythan, River, Estuary (Scotland)
Share: