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  • 51. Thorén, A-K.
    et al.
    Legrand, C.
    Sundblad-Tonderski, Karin
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för fysik, kemi och biologi, Ekologi.
    Nitorgen release from a constructed wetland; influence of water flow and submerged plants2004Inngår i: Ecological Engineering: The Journal of Ecotechnology, ISSN 0925-8574, E-ISSN 1872-6992, Vol. 23, s. 233-249Artikkel i tidsskrift (Fagfellevurdert)
  • 52.
    Tonderski, Karin
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Biologi. Linköpings universitet, Tekniska fakulteten.
    Andersson, Lotta
    SMHI, Sweden.
    Lindström, Göran
    SMHI, Sweden.
    St Cyr, Rasmus
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Biologi. Linköpings universitet, Tekniska fakulteten.
    Schoenberg, Ronny
    University of Tubingen, Germany.
    Taubald, Heinrich
    University of Tubingen, Germany.
    Assessing the use of delta O-18 in phosphate as a tracer for catchment phosphorus sources2017Inngår i: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 607Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Procedures for source apportionment of nutrients transported in rivers and streams are often uncertain and difficult to validate. In this study, we investigated if the oxygen isotope ratios in stream dissolved phosphate delta O-18(P)) can be used to distinguish between the phosphorus (P) originating from agricultural runoff and from rural sewage, at different periods of the year. Water was collected from septic tanks, drainage wells and the stream outlet in a small 7.3 km(2)) agricultural catchment to capture variations in the isotope signature at different flowevents. The d18OP signature in septic tank effluent (+ 13.2 to + 14.5%) was significantly different from that in drainage water (+ 9.0 to + 15.7%). Four different septic tanks had surprisingly similar isotope signature when 24 h composite samples were collected. Most of the water samples were not in oxygen isotope equilibrium. In three drainage wells, the d18OP signature varied from + 7.8 up to + 15.7% with higher values in periods with a larger contribution of superficial streamflow generation. A rainfall soon after manure had been spread resulted in a d18OP of 15.7% in a drainage well, and was also reflected in a similar value at the catchment outlet. This implies that the source isotope signal may be conserved during moderate or high flows. A three end-member model including the geological background would be a useful start to quantify the P contribution from diverse sources. Temporal differences in biological activity and the predominant transport pathways through soil profiles must be considered along with information about fertilisation. In combination with hydrological modelling of water pathways, this may considerably improve our understanding of catchment P losses. (C) 2017 Elsevier B.V. All rights reserved.

  • 53.
    Tonderski, Karin S.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Ekologi. Linköpings universitet, Tekniska högskolan.
    Molecular and microbial advances in wetland science2009Inngår i: Ecological Engineering: The Journal of Ecotechnology, ISSN 0925-8574, E-ISSN 1872-6992, Vol. 35, nr 6, s. 959-960Artikkel i tidsskrift (Annet vitenskapelig)
    Abstract [en]

    The 2nd International Symposium on Wetland Pollutant Dynamics and Control (WETPOL 2007) - held 16-20 September 2007 in Tartu, Estonia - provided a forum for exchange of recent results, ideas and methods among researchers studying the cycling of nitrogen, phosphorus, carbon, heavy metals, and organic pollutants in wetlands. The current special issue contains selected papers from the meeting focused on molecular and microbial techniques and processes of importance for substance cycling and pollutant removal in wetlands. It also includes a review of microbial processes in treatment wetlands that gives a good status description of our current knowledge of how different designs and operational conditions affect environmental factors that influence microbial densities, community composition and activities. The editorial paper highlights results from those papers, where the authors have linked process studies with biochemical and gene-based investigations to achieve a mechanistic understanding of observed processes, and/or the biology of the communities responsible for those processes.

  • 54.
    Tonderski, Karin S
    et al.
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Ekologi. Linköpings universitet, Tekniska högskolan.
    Arheimer, Berit
    Swedish Meteorological and Hydrological Institute.
    Pers, Charlotta B.
    Swedish Meteorological and Hydrological Institute.
    Modeling the impact of potential wetlands on phosphorus retention in a Swedish catchment2005Inngår i: Ambio, ISSN 0044-7447, E-ISSN 1654-7209, Vol. 34, nr 7, s. 544-551Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In southern Sweden, wetlands are constructed to remove nitrogen (N) in agricultural catchments. The possible effects of such wetlands on riverine phosphorus (P) were also estimated using input-output data from three well-monitored wetlands. This was done to formulate a simple model for removal of P that is dependent on inflow characteristics. Next, the N- and P-reducing effects of wetlands were modeled on a catchment scale (1900 km 2) using the HBV-NP model and various assumptions about the wetland area and location. All three wetlands functioned as sinks for total P (tot-P) and for total suspended solids (TSS) with a removal of 10% to 31% and 28% to 50%, respectively. Mean P-removal rates of 17-49 kg ha(-1) yr(-1) were well simulated with the model. Catchment scale simulations indicated that wetlands were more efficient (in percentage of load) as traps for P than for N and that this may motivate the construction of wetlands for P removal far upstream from the catchment outlet.

  • 55. Ulén, B.
    et al.
    Sundblad-Tonderski, Karin
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för fysik, kemi och biologi, Ekologi.
    Cold climate phosphorus uptake by submerged aquatic plants in a sewage treatment free water surface wetland2005Inngår i: Environmental Science and Health, nr 40, s. 1177-1190Artikkel i tidsskrift (Fagfellevurdert)
  • 56. Van Cleemput, O
    et al.
    Boeckx, P
    Lindgren, P-E
    Sundblad-Tonderski, Karin
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för fysik, kemi och biologi, Ekologi.
    Denitrification in Wetlands2007Inngår i: Biology of the nitrogen cycle / [ed] Hermann Bothe, Stuart Ferguson, William E. Newton, Amsterdam: Elsevier , 2007, 1, s. 359-367Kapittel i bok, del av antologi (Annet vitenskapelig)
    Abstract [en]

    All organisms require nitrogen to live and grow. The movement of nitrogen between the atmosphere, biosphere, and geosphere in different forms is described by the nitrogen cycle. This book is an activity of the COST 856 Action on Denitrification. It covers all aspects of the N-cycle: chemistry, biology (enzymology, molecular biology), physics, applied aspects (greenhouse effect, N-pollution problems, practices in farming, in waste-water treatment, and more). In this book, leading editors offer the latest research available on dentrification (reduction of nitrates or nitrites commonly by bacteria- as in soil). * Provides details on denitrification and its general role in the environment* Offers latest research in N-Cycle and its reactions* Discusses impacts on various environments: agriculture, wetlands, plants, waste-water treatment and more* The only book available in the field since the last 20 years* Contains 27 chapters written by internationally highly recognized experts in the field* Covers all modern aspects, emphasizes molecular biology and ecology* Written in an easily understandable way

  • 57. Vymazal, J
    et al.
    Greenway, M
    Sundblad-Tonderski, Karin
    Linköpings universitet, Tekniska högskolan. Linköpings universitet, Institutionen för fysik, kemi och biologi, Ekologi.
    Brix, H
    Mander, U
    Mitsch, WJ
    Constructed wetlands for wastewater treatment2006Inngår i: Wetlands and Natural Resource Management. Ecological Studies / [ed] Verhoeven, J. T. A., Berlin: Springer Verlag , 2006, s. 69-96Kapittel i bok, del av antologi (Annet vitenskapelig)
    Abstract [en]

    Together with its companion, Volume 191 Wetlands: Functioning, Biodiversity Conservation and Restoration, this book provides a broad and well-integrated overview of recent major scientific results in wetland science and their applications in natural resource management issues.After an introduction to the field, a group of internationally known experts summarizes the state of the art on an array of topics, divided into four sections:

    -The Role of Wetlands for Integrated Water Resources Management: Putting Theory into Practice

    -Wetland Science for Environmental Management

    -Wetland Biogeochemistry

    -Wetlands and Climate Change Worldwide The volume will be useful to wetland scientists and natural resource managers, as well as environmental policy makers at all levels.

  • 58.
    Weisner, Stefan E. B.
    et al.
    Halmstad University, Sweden.
    Johannesson, Karin
    Linköpings universitet, Institutionen för fysik, kemi och biologi. Linköpings universitet, Tekniska fakulteten.
    Thiere, Geraldine
    Halmstad University, Sweden.
    Svengren, Henrik
    Halmstad University, Sweden.
    Ehde, Per Magnus
    Halmstad University, Sweden.
    Sundblad Tonderski, Karin
    Linköpings universitet, Institutionen för fysik, kemi och biologi, Biologi. Linköpings universitet, Tekniska fakulteten.
    National Large-Scale Wetland Creation in Agricultural Areas-Potential versus Realized Effects on Nutrient Transports2016Inngår i: Water, ISSN 2073-4441, E-ISSN 2073-4441, Vol. 8, nr 11, artikkel-id 544Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    During 2007-2013, the Swedish Board of Agriculture granted support within a national program to about 1000 wetlands, corresponding to a 5300-hectare wetland area, with the dual goal to remove nutrients from water and to improve biodiversity in agricultural landscapes. The aim of the present study was to compare the effects on nutrient transports that are realized within the national program to what could be obtained with the same area of wetlands if location and design of wetlands were optimized. In single, highly nutrient-loaded wetlands, a removal of around 1000 kg nitrogen and 100 kg phosphorus per hectare wetland area and year was estimated from monitoring data. Statistical models were developed to estimate the overall nutrient removal effects of wetlands created within the national program. Depending on model, the effect of the national program as a whole was estimated to between 27 and 38 kg nitrogen and between 2.7 and 4.5 kg phosphorus per hectare created wetland area and year. Comparison of what is achieved in individual wetlands to what was achieved in the national program indicates that nutrient removal effects could be increased substantially in future wetland programs by emphasising location and design of wetlands.

12 51 - 58 of 58
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