Dissolved organic matter in the boreal landscape: Function, dynamics and regulation

Hjalmar Laudon1
1 Forest Ecology and Management, SLU

Key Note 1 in Plenary Keynotes

14.07.2014, 09:30-10:15

DOC – dissolved organic carbon - is one of the most critical water quality variables in many natural freshwaters, playing a vital role as a transport vector for metals and organic pollutants, energy substrate for aquatic organisms and as a modulator of the aquatic food web structure. While the production and export of DOC from the terrestrial landscape has been extensively studied during the past several decades, fundamental understanding of processes that control stream water at the soil/water interface, across different spatial scales and across climatic regions are still at its infancy. Elucidating the controls on DOC concentrations is essential for disentangling the causal mechanisms for recent DOC concentration increase, but also for our ability to foresee how DOC concentrations in small streams and lakes may respond to environmental perturbations in the future.

The ambition with this presentation is to summaries the state-of-art understanding of the function, dynamics and regulation of DOC with a focus on the boreal landscape. To do this I will exemplify some key aspects of our mechanistic understanding of DOC dynamics across scales, seasons and climatic regions by using results from the multi-disciplinary Krycklan Catchment Study (www.slu.se/Krycklan) and findings from the North-Watch catchment inter-comparison program (www.abdn.ac.uk/northwatch) melded into a broader scientific context.

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last modified 2014-06-19