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Title: The response of dissolved carbon dynamics to environmental change in upland shallow organic soils : a study of organic horizon responsiveness and soil horizon interactions
Author: Chadwick, Katherine L.
ISNI:       0000 0001 3525 8480
Awarding Body: University of Aberdeen
Current Institution: University of Aberdeen
Date of Award: 2007
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This thesis examined the relatively uncharted realm of dissolved C dynamics in upland shallow organic soils. Extensive preliminary investigations and preparatory experimental evaluations led to the successful deployment of sampling strategies at a range of spatial scales in a climosequence of matched field sites in Wales, Scotland and Iceland. These sites provided the basis for investigation of climatic and mineralogical effects upon dissolved C transformations in upland shallow organic soils. Biological assessments including novel application of modified techniques identified the responsiveness of these soils to environmental perturbations at a range of experimental scales, and over varied temporal periods. As C loss from upland organic soils requires both degradation of SOM and export of degraded C via solution percolation and flushing or gaseous exchange, the capacity of the different mineral horizons to retain degraded C, and indeed the quality of the bound C, is of consequence to soil C source-sink understanding. The combined roles of organic and mineral horizons in C turnover potential and retention capability indicate the importance of upland shallow organic soils in modelling soil C dynamics in response to climate change. This highlights the necessity of sustainable management of these upland areas within the northern hemisphere.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available