caa a22 4500 605517363 CHVBK 20210128100719.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10533-015-0162-8 doi (NATIONALLICENCE)springer-10.1007/s10533-015-0162-8 Effects of temperature, rainfall and conifer felling practices on the surface water chemistry of northern peatlands [Elektronische Daten] [François Muller, Kuei-Chen Chang, Chon-Lin Lee, Stephen Chapman] Afforested peatlands account for about 25% of human-affected peatlands worldwide. In some regions, particularly the British Isles, forest-to-bog conversions are now underway in the hope of increasing carbon storage and restoring original ecosystem functions. In this study, the effects on surface water quality of forest-to-bog restoration in the Flow Country peatlands of northern Scotland were monitored during 15months. The hydrochemistry of rainwater, resurgence ground water, forestry drainage ditch water, open bog surface water, forestry-influenced loch water and stream water was examined before, during and after felling. The seasonal cycles of biologically active (C, Si, P) and organically complexed (Fe, Al) elements were characterised by major changes in concentration. The felling operations amplified these effects due to (i) the decomposition of felling residues (leaching K and C) and (ii) the disturbance and partial mineralisation of shallow peat soils (releasing P, Fe and Al). Shorter term changes (1-10days) produced by rainfall events and associated changes in hydrological flow paths controlled the concentrations of Na, Ca, Mg, Mn, and to a lesser extent K and Al. There were significant negative correlations with flow of [K], [Ca] and [Mg] but a positive correlation between stream flow and [Al]. Concentration-flow relationships were not significantly altered by the felling operations because of the relatively low volume of water released from the felled area. Fluctuations in the water table represented another important control of surface water composition. Resurgence waters produced high [Fe] and [Si] values when water table levels were low. These contributions were diluted with runoff and surface soil waters enriched in dissolved organic carbon (DOC) when levels rose. Sequential ultrafiltration revealed that Fe, C and P co-occurred in the >30kDa molecular weight fraction in constant relative concentrations. Since forest-to-bog restoration raises the water table, it can be anticipated to result initially in more intense flushing of DOC, including the >30kDa molecular weight fraction where Fe and P co-occur. Springer International Publishing Switzerland, 2015 Colloids nationallicence DOC nationallicence Felling nationallicence Iron nationallicence Peatland nationallicence Stream nationallicence Muller François Department of Biological and Environmental Sciences, Qatar University, PO Box 2713, Doha, Qatar aut Chang Kuei-Chen Department of Marine Environment and Engineering, National Sun Yat-sen University, 80424, Kaohsiung, Taiwan aut Lee Chon-Lin Department of Marine Environment and Engineering, National Sun Yat-sen University, 80424, Kaohsiung, Taiwan aut Chapman Stephen The James Hutton Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut Biogeochemistry Springer International Publishing 126/3(2015-12-01), 343-362 0168-2563 126:3<343 2015 126 10533 https://doi.org/10.1007/s10533-015-0162-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-015-0162-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Muller François Department of Biological and Environmental Sciences, Qatar University, PO Box 2713, Doha, Qatar aut NATIONALLICENCE 700 1- Chang Kuei-Chen Department of Marine Environment and Engineering, National Sun Yat-sen University, 80424, Kaohsiung, Taiwan aut NATIONALLICENCE 700 1- Lee Chon-Lin Department of Marine Environment and Engineering, National Sun Yat-sen University, 80424, Kaohsiung, Taiwan aut NATIONALLICENCE 700 1- Chapman Stephen The James Hutton Institute, Craigiebuckler, AB15 8QH, Aberdeen, UK aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 126/3(2015-12-01), 343-362 0168-2563 126:3<343 2015 126 10533