Blar i NIVA Open Access Archive på forfatter "Couture, Raoul-Marie"

Viser treff 1-18 av 18

    • Bottom RedOx Model (BROM v.1.1): a coupled benthic–pelagic model for simulation of water and sediment biogeochemistry 

      Yakushev, Evgeny; Protsenko, Elizaveta; Bruggeman, Jorn; Wallhead, Philip; Pakhomova, Svetlana V.; Yakubov, Shamil Kh.; Bellerby, Richard; Couture, Raoul-Marie (Journal article; Peer reviewed, 2017)
      Interactions between seawater and benthic systems play an important role in global biogeochemical cycling. Benthic fluxes of some chemical elements (e.g., C, N, P, O, Si, Fe, Mn, S) alter the redox state and marine carbonate ...

    • Climate change, cyanobacteria blooms and ecological status of lakes: A Bayesian network approach 

      Moe, S. Jannicke; Haande, Sigrid; Couture, Raoul-Marie (Journal article; Peer reviewed, 2016)
      Eutrophication of lakes and the risk of harmful cyanobacterial blooms due is a major challenge for management of aquatic ecosystems, and climate change is expected to reinforce these problems. Modelling of aquatic ecosystems ...

    • Coupling Water Column and Sediment Biogeochemical Dynamics: Modeling Internal Phosphorus Loading, Climate Change Responses, and Mitigation Measures in Lake Vansjø, Norway 

      Markelov, Igor; Couture, Raoul-Marie; Fischer, Rachele; Haande, Sigrid; Van Cappellen, Philippe (Peer reviewed; Journal article, 2019)
      We expanded the existing one‐dimensional MyLake model by incorporating a vertically resolved sediment diagenesis module and developing a reaction network that seamlessly couples the water column and sediment biogeochemistry. ...

    • Emerging investigator series: geochemistry of trace elements associated with Fe and Mn nodules in the sediment of limed boreal lakes 

      Couture, Raoul-Marie; Hindar, Atle; Rognerud, Sigurd (Journal article; Peer reviewed, 2018)
      Thousands of boreal lakes were limed for decades in Scandinavia to counteract the effect of anthropogenic acidification. We measured the concentrations of alkali earth metals (Ca, Mg, Ba), metals (Mn, Fe, Al, Co, Cd, Pb, ...

    • Impacts of multiple stressors on freshwater biota across spatial scales and ecosystems 

      Birk, Sebastian; Chapman, Daniel; Carvalho, Laurence; Spears, Bryan M.; Andersen, Hans Estrup; Argillier, Christine; Auer, Stefan; Baattrup-Pedersen, Annette; Banin, Lindsay; Beklioğlu, Meryem; Bondar-Kunze, Elisabeth; Borja, Angel; Branco, Paulo; Bucak, Tuba; Buijse, Anthonie D.; Cardoso, Ana Cristina; Couture, Raoul-Marie; Cremona, Fabien; de Zwart, Dick; Feld, Christian K.; Ferreira, M Teresa; Feuchtmayr, Heidrun; Gessner, Mark O.; Gieswein, Alexander; Globevnik, Lidija; Graeber, Daniel; Graf, Wolfram; Gutiérrez-Cánovas, Cayetano; Hanganu, Jenica; Işkın, Uğur; Jarvinen, Marko; Jeppesen, Erik; Kotamäki, Niina; Kuijper, Marijn; Lemm, Jan U; Lu, Shenglan; Solheim, Anne Lyche; Mischke, Ute; Moe, S. Jannicke; Nõges, Peeter; Nõges, Tiina; Ormerod, Steve J; Panagopoulos, Yiannis; Phillips, Geoff; Posthuma, Leo; Pouso, Sarai; Prudhomme, Christel; Rankinen, Katri; Rasmussen, Jes Jessen; Richardson, Jessica; Sagouis, Alban; Santos, Jose Maria; Schäfer, Ralf B; Schinegger, Rafaela; Schmutz, Stefan; Schneider, Susanne Claudia; Schülting, Lisa; Segurado, Pedro; Stefanidis, Kostas; Sures, Bernd; Thackeray, Stephen J.; Turunen, Jarno; Uyarra, María C.; Venohr, Markus; von der Ohe, Peter Carsten; Willby, Nigel; Hering, Daniel (Peer reviewed; Journal article, 2020)
      Climate and land-use change drive a suite of stressors that shape ecosystems and interact to yield complex ecological responses (that is, additive, antagonistic and synergistic effects). We know little about the spatial ...

    • Improvement in municipal wastewater treatment alters lake nitrogen to phosphorus ratios in populated regions 

      Tong, Yindong; Wang, Mengzhu; Peñuelas, Josep; Liu, Xueyan; Paerl, Hans W.; Elser, James J.; Sardans, Jordi; Couture, Raoul-Marie; Larssen, Thorjørn; Hu, Hongying; Dong, Xin; He, Wei; Zhang, Wei; Wang, Xuejun; Zhang, Yang; Liu, Yi; Zeng, Siyu; Kong, Xiangzhen; Janssen, Annette B.G.; Lin, Yan (Peer reviewed; Journal article, 2020)
      Large-scale and rapid improvement in wastewater treatment is common practice in developing countries, yet this influence on nutrient regimes in receiving waterbodies is rarely examined at broad spatial and temporal scales. ...

    • Land Use Change to Reduce Freshwater Nitrogen and Phosphorus will Be Effective Even with Projected Climate Change 

      Wade, Andrew J.; Skeffington, Richard A.; Couture, Raoul-Marie; Lampa, Martin Erlandsson; Groot, Simon; Halliday, Sarah J.; Harezlak, Valesca; Hejzlar, Josef; Jackson-Blake, Leah Amber; Lepistö, Ahti; Papastergiadou, Eva; Riera, Joan Lluis; Rankinen, Katri; Shahgedanova, Maria; Trolle, Dennis; Whitehead, Paul G.; Psaltopoulos, Demetris; Skuras, Dimitris (Peer reviewed; Journal article, 2022)
      Recent studies have demonstrated that projected climate change will likely enhance nitrogen (N) and phosphorus (P) loss from farms and farmland, with the potential to worsen freshwater eutrophication. Here, we investigate ...

    • Mechanisms for metal nodule formation on sediment surfaces of limed lakes 

      Hindar, Atle; Couture, Raoul-Marie; Eriksen, Tor Erik; Rognerud, Sigurd (NIVA-rapport;6875, Research report, 2015)
      The water chemical and biological effects of liming have been fairly well documented. One of the research projects revealed relatively large (up to 1-3 cm in diameter) metal nodules on the sediment surface of some of the ...

    • Modeling the influence of eutrophication and redox conditions on mercury cycling at the sediment-water interface in the Berre Lagoon 

      Pakhomova, Svetlana; Yakushev, Evgeny; Protsenko, Elizaveta; Rigaud, Sylvain; Cossa, Daniel; Knoery, Joel; Couture, Raoul-Marie; Radakovitch, Olivier; Yakubov, Shamil; Krzeminska, Dominika; Newton, Alice (Journal article; Peer reviewed, 2018)
      This study presents a specifically designed Mercury module in a coupled benthic-pelagic reactive-transport model - Bottom RedOx Model (BROM) that allows to study mercury (Hg) biogeochemistry under different conditions. ...

    • Modelling environmental impacts of Cesium-137 under a hypothetical release of radioactive waste 

      Lin, Yan; Couture, Raoul-Marie; Klein, Heiko; Ytre-Eide, Martin; Dyve, Jan Erik; Lind, Ole Christian; Bartnicki, Jerzy; Nizzetto, Luca; Butterfield, Daniel; Larssen, Thorjørn; Salbu, Brit (Journal article; Peer reviewed, 2019)
      Waste tanks at the nuclear facility located at Sellafield, UK, represent a nuclear source which could release radionuclides to the atmosphere. A model chain which combines atmospheric transport, deposition as well as ...

    • Modelling phosphorus loading and algal blooms in a Nordic agricultural catchment-lake system under changing land-use and climate 

      Couture, Raoul-Marie; Tominaga, Koji; Starrfelt, Jostein; Moe, S. Jannicke; Kaste, Øyvind; Wright, Richard Frederic (Peer reviewed; Journal article, 2014)
      A model network comprising climate models, a hydrological model, a catchment-scale model for phosphorus biogeochemistry, and a lake thermodynamics and plankton dynamics model was used to simulate phosphorus loadings, total ...

    • Modelling the effects of climate and land-use change on the hydrochemistry and ecology of the River Wye (Wales) 

      Bussi, Gianbattista; Whitehead, Paul G; Gutierrez-Canovas, Cayetano; Ledesma, Jose L J; Ormerod, Steve J; Couture, Raoul-Marie (Journal article; Peer reviewed, 2018)
      Interactions between climate change and land use change might have substantial effects on aquatic ecosystems, but are still poorly understood. Using the Welsh River Wye as a case study, we linked models of water quality ...

    • Oxygen dynamics in a boreal lake responds to long-term changes in climate, ice phenology, and DOC inputs 

      Couture, Raoul-Marie; de Wit, Heleen; Tominaga, Koji; Kiuru, Petri; Markelov, Igor (Journal article; Peer reviewed, 2015)
      Boreal lakes are impacted by climate change, reduced acid deposition, and changing loads of dissolved organic carbon (DOC) from catchments. We explored, using the process-based lake model MyLake, how changes in these ...

    • Pipes or chimneys? For carbon cycling in small boreal lakes, precipitation matters most 

      de Wit, Heleen A; Couture, Raoul-Marie; Jackson-Blake, Leah; Futter, Martyn N.; Valinia, Salar; Austnes, Kari; Guerrero, Jose-Luis; Lin, Yan (Journal article; Peer reviewed, 2018)
      Are small lakes passive pipes transporting terrigenous organic carbon (dissolved organic carbon [DOC]), or chimneys for CO2 release in the landscape? Using a unique combination of 30‐yr measurements, sediment dating and ...

    • Predicting Lake Quality for the Next Generation: Impacts of Catchment Management and Climatic Factors in a Probabilistic Model Framework 

      Moe, S. Jannicke; Couture, Raoul-Marie; Haande, Sigrid; Solheim, Anne Lyche; Jackson-Blake, Leah Amber (Journal article; Peer reviewed, 2019)
      Lake ecosystems across the world are under combined pressures of eutrophication and climate change, which increase the risk of harmful cyanobacteria blooms, reduced ecological status, and degraded ecosystem services. In ...

    • Response of lake metabolism to catchment inputs inferred using high-frequency lake and stream data from across the northern hemisphere 

      Corman, Jessica R.; Zwart, Jacob A.; Klug, Jennifer; Bruesewitz, Denise A.; de Eyto, Elvira; Klaus, Marcus; Knoll, Lesley B.; Rusak, James A.; Vanni, Michael J.; Alfonso, María Belén; Fernandez, Rocio Luz; Yao, Huaxia; Austnes, Kari; Couture, Raoul-Marie; de Wit, Heleen; Karlsson, Jan; Laas, Alo (Peer reviewed; Journal article, 2023)
      In lakes, the rates of gross primary production (GPP), ecosystem respiration (R), and net ecosystem production (NEP) are often controlled by resource availability. Herein, we explore how catchment vs. within lake predictors ...

    • Simulating water quality and ecological status of Lake Vansjø, Norway, under land-use and climate change by linking process-oriented models with a Bayesian network 

      Couture, Raoul-Marie; Moe, S. Jannicke; Lin, Yan; Kaste, Øyvind; Haande, Sigrid; Solheim, Anne Lyche (Journal article; Peer reviewed, 2018)
      Excess nutrient inputs and climate change are two of multiple stressors affecting many lakes worldwide. Lake Vansjø in southern Norway is one such eutrophic lake impacted by blooms of toxic blue-green algae (cyanobacteria), ...

    • Speciation dynamics of oxyanion contaminants (As, Sb, Cr) in argillaceous suspensions during oxic-anoxic cycles 

      Markelova, Ekaterina; Couture, Raoul-Marie; Parsons, Christopher T.; Markelov, Igor; Madé, Benoît; Van Cappellen, Philippe; Charlet, Laurent (Journal article; Peer reviewed, 2018)
      Argillaceous geological formations are considered promising repositories for waste containing inorganic contaminants. However, the sequestration capacity of an argillaceous natural barrier may change as a result of dynamic ...