naa a22 4500 510749801 CHVBK 20180411083100.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11270-013-1649-3 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1649-3 Differences in the Quality of Seepage Water and Runoff Caused by Plant Community and Grazing at an Alpine Site in Hol, Southern Norway [Elektronische Daten] [Vegard Martinsen, Franz Grund, Marit Kjeve, Heleen de Wit, Gunnar Austrheim, Atle Mysterud, Jan Mulder] Alpine ecosystems, representing a large proportion of the land area in Europe, are under pressure from changes in climate and land-use. This may also impact the quality of drainage waters. Here, we assess effects of plant communities (snowbed, dwarf shrub heath, and tall herb meadow) on concentrations of dissolved organic carbon and nitrogen (DOC and DON), ammonium (NH4-N), nitrate (NO3-N), and phosphorus (tot-P and PO4-P) in locally derived seepage water in a non-fertilized sub-alpine area of southern Norway. In addition, we investigated effects of two density levels of sheep (no sheep and 80 sheep km−2) on infiltration capacity, pore size distribution and concentrations of nutrients and bacteria in surface runoff. Concentrations of NO3-N (<0.02-0.03mgl−1) and NH4-N (<0.02-0.03mgl−1) were low in seepage waters with no significant differences associated with plant community. Also, concentrations of DOC and DON were low, in particular in snowbeds, probably due to low productivity and small soil carbon pools. Infiltration rates, which were significantly smaller in snowbeds than in tall herb meadow, were further reduced by grazing. In turn, this caused increased runoff of coliform bacteria, whereas no effect of grazing on NH4-N, NO3-N and PO4-P was observed. Grazing may significantly alter biological water quality but is not likely to affect the productivity of surface waters in non-fertilized alpine areas. Springer Science+Business Media Dordrecht, 2013 Alpine system nationallicence Vegetation nationallicence Grazing nationallicence Nutrients nationallicence Coliforms nationallicence Surface runoff nationallicence Martinsen Vegard Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432, Ås, Norway aut Grund Franz Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432, Ås, Norway aut Kjeve Marit Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432, Ås, Norway aut de Wit Heleen Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, NO-0349, Oslo, Norway aut Austrheim Gunnar Museum of Natural History and Archaeology, Section of Natural History, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway aut Mysterud Atle Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biology, University of Oslo, Blindern, P.O. Box 1066, NO-0316, Oslo, Norway aut Mulder Jan Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432, Ås, Norway aut Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-12 0049-6979 224:9<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1649-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1649-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Martinsen Vegard Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432, Ås, Norway aut NATIONALLICENCE 700 1- Grund Franz Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432, Ås, Norway aut NATIONALLICENCE 700 1- Kjeve Marit Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432, Ås, Norway aut NATIONALLICENCE 700 1- de Wit Heleen Norwegian Institute for Water Research (NIVA), Gaustadalléen 21, NO-0349, Oslo, Norway aut NATIONALLICENCE 700 1- Austrheim Gunnar Museum of Natural History and Archaeology, Section of Natural History, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway aut NATIONALLICENCE 700 1- Mysterud Atle Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biology, University of Oslo, Blindern, P.O. Box 1066, NO-0316, Oslo, Norway aut NATIONALLICENCE 700 1- Mulder Jan Department of Plant and Environmental Sciences, Norwegian University of Life Sciences, P.O. Box 5003, NO-1432, Ås, Norway aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-12 0049-6979 224:9<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer