caa a22 4500 44538350X CHVBK 20180317143024.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s10021-011-9452-8 doi (NATIONALLICENCE)springer-10.1007/s10021-011-9452-8 Patterns and Dynamics of Dissolved Organic Carbon (DOC) in Boreal Streams: The Role of Processes, Connectivity, and Scaling [Elektronische Daten] [Hjalmar Laudon, Martin Berggren, Anneli Ågren, Ishi Buffam, Kevin Bishop, Thomas Grabs, Mats Jansson, Stephan Köhler] We bring together three decades of research from a boreal catchment to facilitate an improved mechanistic understanding of surface water dissolved organic carbon (DOC) regulation across multiple scales. The Krycklan Catchment Study encompasses 15 monitored nested research catchments, ranging from 3 to 6900ha in size, as well as a set of monitored transects of forested and wetland soils. We show that in small homogenous catchments, hydrological functioning provides a first order control on the temporal variability of stream water DOC. In larger, more heterogeneous catchments, stream water DOC dynamics are regulated by the combined effect of hydrological mechanisms and the proportion of major landscape elements, such as wetland and forested areas. As a consequence, streams with heterogeneous catchments undergo a temporal switch in the DOC source. In a typical boreal catchment covered by 10-20% wetlands, DOC originates predominantly from wetland sources during low flow conditions. During high flow, the major source of DOC is from forested areas of the catchment. We demonstrate that by connecting knowledge about DOC sources in the landscape with detailed hydrological process understanding, an improved representation of stream water DOC regulation can be provided. The purpose of this study is to serve as a framework for appreciating the role of regulating mechanisms, connectivity and scaling for understanding the pattern and dynamics of surface water DOC across complex landscapes. The results from this study suggest that the sensitivity of stream water DOC in the boreal landscape ultimately depends on changes within individual landscape elements, the proportion and connectivity of these affected landscape elements, and how these changes are propagated downstream. Springer Science+Business Media, LLC, 2011 dissolved organic carbon nationallicence scaling nationallicence connectivity nationallicence boreal forest nationallicence Krycklan catchment nationallicence hydrology nationallicence Laudon Hjalmar Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), 90183, Umeå, Sweden aut Berggren Martin Department of Ecology and Environmental Science, Umeå University, 90187, Umeå, Sweden aut Ågren Anneli Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), 90183, Umeå, Sweden aut Buffam Ishi Department of Biological Sciences and Department of Geography, University of Cincinnati, Cincinnati, Ohio, USA aut Bishop Kevin Department of Environmental Assessment, SLU, P.O. Box 7050, 75007, Uppsala, Sweden aut Grabs Thomas Department of Earth Sciences, Uppsala University, 75236, Uppsala, Sweden aut Jansson Mats Department of Ecology and Environmental Science, Umeå University, 90187, Umeå, Sweden aut Köhler Stephan Department of Environmental Assessment, SLU, P.O. Box 7050, 75007, Uppsala, Sweden aut Ecosystems Springer-Verlag 14/6(2011-09-01), 880-893 1432-9840 14:6<880 2011 14 10021 https://doi.org/10.1007/s10021-011-9452-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-011-9452-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Laudon Hjalmar Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), 90183, Umeå, Sweden aut NATIONALLICENCE 700 1- Berggren Martin Department of Ecology and Environmental Science, Umeå University, 90187, Umeå, Sweden aut NATIONALLICENCE 700 1- Ågren Anneli Department of Forest Ecology and Management, Swedish University of Agricultural Sciences (SLU), 90183, Umeå, Sweden aut NATIONALLICENCE 700 1- Buffam Ishi Department of Biological Sciences and Department of Geography, University of Cincinnati, Cincinnati, Ohio, USA aut NATIONALLICENCE 700 1- Bishop Kevin Department of Environmental Assessment, SLU, P.O. Box 7050, 75007, Uppsala, Sweden aut NATIONALLICENCE 700 1- Grabs Thomas Department of Earth Sciences, Uppsala University, 75236, Uppsala, Sweden aut NATIONALLICENCE 700 1- Jansson Mats Department of Ecology and Environmental Science, Umeå University, 90187, Umeå, Sweden aut NATIONALLICENCE 700 1- Köhler Stephan Department of Environmental Assessment, SLU, P.O. Box 7050, 75007, Uppsala, Sweden aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag 14/6(2011-09-01), 880-893 1432-9840 14:6<880 2011 14 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer