Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Equifinality in the modelling of ammonia volatilisation from a flooded rice system
    Nurulhuda, Khairudin ; Zakaria, Mohamad Pauzi ; Struik, Paul C. ; Keesman, Karel J. - \ 2020
    Environmental Modelling & Software 133 (2020). - ISSN 1364-8152
    Ammonia volatilisation - Equifinality - Flooded rice - Model evaluation - Sensitivity analysis

    Equifinality is the capability of models to produce similar model-output responses. The objective of this study is to use a numerical experimentation to investigate the equifinality of six modules for estimating ammonia (NH3) volatilisation from the floodwater in a rice system. Except for the Chowdary's, all modules can simulate the fluctuating trends of NH3 volatilisation rates. NFLOOD v.1 shows low equifinality to Jayaweera and Mikkelsen's and the regression equations in CERES-Rice, DSSAT-CSM and APSIM-Oryza in estimating the NH3 volatilisation. The equation in APSIM-Oryza has high equifinality to that in CERES-Rice. Both regression equations have low equifinality to the regression equation in DSSAT-CSM. All three regression equations show low equifinality to Jayaweera and Mikkelsen's. Findings in this study are valuable to make an informed model selection, to interpret model-output responses critically and to improve an existing model by adopting an alternative module without using experimental data explicitly.

    Opportunities for seaweed biorefinery
    Lange, Lene ; Grandorf Bak, Urd ; Cole Brandstrup Hansen, Steffen ; Gregersen, Olavur ; Harmsen, Paulien ; Nordberg Karlsson, Eva ; Meyer, Anne ; Mikkelsen, Maria D. ; Broek, Ben van den; Óli Hreggviðsson, Guðmundur - \ 2020
    In: Sustainable Seaweed Technologies / Dolores Torres, M., Kraan, S., Dominguez, H., Elsevier (Advances in Green Chemistry ) - ISBN 9780128179437 - p. 3 - 31.
    This introductory chapter provides an overview of seaweed biorefinery opportunities, providing basis for multiple value chains, contributing to nutrition and health of a growing global population, to local job generation and development, to ecosystem services, and not the least to climate change mitigation and adaptation. A unique and rich diversity of the seaweed components provides the basis for the broad spectrum of value-chains described here. Red, brown, and green seaweeds are phylogenetically very different and this is reflected in their differences in growth, structure, and biochemical composition. Stable supply and high quality of feedstock are essential for unlocking the value-adding potential of seaweeds. A special focus of the chapter is to provide an overview of the range of different methods of seaweed production (through cultivation or from natural growth, collected or cut at the shore). Furthermore, the results of dedicated efforts to develop new deep-sea cultivation technologies of brown seaweed are highlighted. The chapter has a dual message with regard to seaweed processing: the need to develop more environmentally benign biological processing (to replace chemical processing); the advantage (regarding resource efficiency) and opportunities (social and economic) of designing seaweed biorefineries according to the cascading principle. Making optimized use of all valuable components of seaweed biomass, cascading from high-value products, such as skin care, health-promoting food and feed supplements and functional food ingredients; to lower-value products, such as plant stimulants, soil improvers, and bioenergy. Lastly, this introductory chapter provides global perspectives for future development of sustainable seaweed utilization, contributing to the UN-SDGs, providing livelihood and health for more.
    Influence of rate of salinity increase on nitrifying biofilms
    Navada, Sharada ; Vadstein, Olav ; Tveten, Ann-Kristin ; Verstege, Gerhardus C. ; Terjesen, Bendik Fyhn ; Mota, Vasco C. ; Venkataraman, Vishwesh ; Gaumet, Frédéric ; Mikkelsen, Øyvind ; Kamstra, Andries - \ 2019
    Journal of Cleaner Production 238 (2019). - ISSN 0959-6526
    A strategy for rapid increase in salinity with minimal impact on nitrification is important for ammonia removal from saline effluents, especially in recirculating aquaculture systems with high water reuse. To study the influence of the rate of salinity increase on nitrification, continuously operated moving bed biofilm reactors were transferred from freshwater (0‰ salinity) to seawater (32‰ salinity) at five different rates of salinity change: 0 (control), 1, 2, 6, and 15‰ day−1. Each daily change was conducted gradually overnight. The results showed that at salinities higher than 4–8‰, the ammonia oxidation capacity decreased linearly with salinity and reduced by 50–90% upon complete seawater transfer, with the greatest reduction in the 1‰ day−1 treatment. Thereafter, it increased linearly with time, with little difference between treatments. Overall, the biofilm microbial communities in the control and the 15‰ day−1 treatment were highly similar, while those in the other treatments shifted significantly with time and had greater species diversity, richness, and evenness of nitrifiers. Candidatus Nitrotoga was the dominant nitrite oxidizing bacteria in all treatments throughout the study, indicating that this recently discovered group may tolerate salinities up to 32‰. The results suggest that although the rate of salinity increase influences the microbial community composition, it only weakly influences ammonia oxidation capacity, which mainly depends on salinity and seawater acclimatization time. Therefore, for rapid seawater acclimatization of freshwater nitrifying biofilms, increasing the salinity continuously in two days may be a better strategy than increasing the salinity over a month, provided an initial decrease in ammonia oxidation is acceptable. The findings can aid in the shift from net-pen fish farming to recirculating aquaculture systems, thereby lowering the ecological impacts of seafood production.
    Comparison of ammonia emissions related to nitrogen use efficiency of livestock production in Europe
    Groenestein, C.M. ; Hutchings, N.J. ; Haenel, H.D. ; Amon, B. ; Menzi, H. ; Mikkelsen, M.H. ; Misselbrook, T.H. ; Bruggen, C. van; Kupper, T. ; Webb, J. - \ 2019
    Journal of Cleaner Production 211 (2019). - ISSN 0959-6526 - p. 1162 - 1170.
    Ammonia emission intensity - Animal protein - Feed nitrogen - Manure management - Nitrogen use efficiency

    The increasing global demand for food and the environmental effects of reactive nitrogen losses in the food production chain, increase the need for efficient use of nitrogen (N). Of N harvested in agricultural plant products, 80% is used to feed livestock. Because the largest atmospheric loss of reactive nitrogen from livestock production systems is ammonia (NH3), the focus of this paper is on N lost as NH3 during the production of animal protein. The focus of this paper is to understand the key factors explaining differences in Nitrogen Use Efficiency (NUE) of animal production among various European countries. Therefore we developed a conceptual framework to describe the NUE defined as the amount of animal-protein N per N in feed and NH3–N losses in the production of milk, beef, pork, chicken meat and eggs in The Netherlands, Switzerland, United Kingdom, Germany, Austria and Denmark. The framework describes how manure management and animal-related parameters (feed, metabolism) relate to NH3 emissions and NUE. The results showed that the animal product with the lowest NUE had the largest NH3 emissions and vice versa, which agrees with the reciprocal relationship between NUE and NH3 within the conceptual framework. Across animal products for the countries considered, about 20% of the N in feed is lost as NH3. The significant smallest proportion (12%) of NH3–N per unit of Nfeed is from chicken production. The proportions for other products are 17%, 19%, 20% and 22% for milk, pork, eggs and beef respectively. These differences were not significantly different due to the differences among countries. For all countries, NUE was lowest for beef and highest for chicken. The production of 1 kg N in beef required about 5 kg N in feed, of which 1 kg N was lost as NH3–N. For the production of 1 kg N in chicken meat, 2 kg N in feed was required and 0.2 kg was lost as NH3. The production of 1 kg N in milk required 4 kg N in feed with 0.6 kg NH3–N loss, the same as pork and eggs, but those needed 3 and 3.5 kg N in feed per kg N in product respectively. Except for beef, the differences among these European countries were mainly caused by differences in manure management practices and their emission factors, rather than by animal-related factors including feed and digestibility influencing the excreted amount of ammoniacal N (TAN). For beef, both aspects caused important differences. Based on the results, we encourage the expression of N losses as per N in feed or per N in product, in addition to per animal place, when comparing production efficiency and NUE. We consider that disaggregating emission factors into a diet/animal effect and a manure management effect would improve the basis for comparing national NH3 emission inventories.

    Final Design of RI platform for consumer behaviour and lifestyle : deliverable D13.4
    Poppe, K.J. ; Bogaardt, M.J. ; Selnes, T. ; Zimmermann, K.L. ; Veer, P. van 't; Koroušić Seljak, Barbara ; Pourabdollahian, Golboo ; Copani, Giacomo ; Lienemann, Kerstin ; Cueva, Javier de la; Carr, Indira ; Timotijevic, Lada ; Hodgkins, Charo ; Finglas, Paul ; Mikkelsen, Bent ; Raats, Monique - \ 2018
    EU - 4 p.
    Standard method performance requirements (SMPRs®) 2017.017 : Determination of 2-and 3-MCPD, 2-and 3-MCPD esters, and glycidyl esters in infant and adult/pediatric nutritional formula
    Kuhlmann, Jan ; Anderson, Warwick ; Bandong, Grace ; Bratinova, Stefanka ; Burger, Dominik ; Cook, Jo Marie ; Cruijsen, Hans ; Dominicis, Emiliano De; Vreeze, Marcel De; Ehling, Stefan ; Empl, Anna Maria ; Evers, Jaap ; Gude, Thomas ; Hanlon, Paul ; Jaudzems, Greg ; Koesukwiwat, Urairat ; Lesueur, Celine ; MacMahon, Shaun ; Manti, Vicky ; Mastovska, Katerina ; Mikkelsen, Aase ; Myers, Rick ; Paolillo, Paola ; Parisi, Salvatore ; Pinkston, J.D. ; Rankin, Robert ; Reuther, John ; Romano, Joe ; Schulz, Claudia ; Stanley, Glenn ; Stephenson, Cheryl ; Sullivan, Darryl ; Szpylka, John ; Tennyson, Steve ; Leeuwen, Stefan Van; Yadlapalli, Sudhakar ; Yeung, Jupiter - \ 2018
    Journal of AOAC International 101 (2018)1. - ISSN 1060-3271 - p. 324 - 326.
    Report on recommendations on future research and policy : deliverable D8.4
    Hondo, Haris ; Kaunisto, Erik ; Ofei, Kwabena Titi ; Mikkelsen, Bent Egberg ; Zimmermann, K.L. ; Veer, P. van 't - \ 2018
    EU - 32 p.
    Inventory of types of consumer-generated food preparation data and data collection methodologies : deliverable D6.1
    Klepacz, Naomi ; Maringer, Marcus ; Ekman, Susanne ; Normann, Anne ; Geelen, M.M.E.E. ; Raats, Monique ; Zimmermann, K.L. ; Mikkelsen, Bent Egberg - \ 2018
    EU - 19 p.
    Report on gaps and needs - WP6, Report on the potentials and limitations for the use of user-generated domestic food preparation data to answer questions regarding determinants of nutrition and eating : deliverable D6.5
    Klepacz, Naomi ; Maringer, Marcus ; Ekman, Susanne ; Normann, Anne ; Geelen, M.M.E.E. ; Raats, Monique ; Zimmermann, K.L. ; Veer, P. van 't; Mikkelsen, Bent Egberg - \ 2018
    EU - 16 p.
    Report on the synthesis of the findings for WP8-10 : deliverable D4.3
    Hodgkins, Charo ; Timotijevic, Lada ; Finglas, Paul ; Hieke, Sophie ; Mikkelsen, Bent Egberg ; Zimmermann, K.L. ; Veer, P. van 't - \ 2018
    EU - 19 p.
    Position and final paper of RICHFIELDS : deliverable D1.2
    Bogaardt, M.J. ; Copani, Giacomo ; Cueva, Javier de la; Finglas, Paul ; Geelen, M.M.E.E. ; Hodgkins, Charo ; Korousic, Barbara ; Mikkelsen, Bent ; Poppe, K.J. ; Pour Abdollahian, Golboo ; Puttelaar, J. van den; Raats, Monique ; Selnes, T. ; Timotijevic, Lada ; Veen, H.B. van der; Veer, P. van 't; Zimmermann, K.L. - \ 2018
    EU - 49 p.
    Designing a research infrastructure on dietary intake and its determinants
    Bogaardt, M.J. ; Geelen, A. ; Zimmermann, K. ; Finglas, P. ; Raats, M.M. ; Mikkelsen, B.E. ; Poppe, K.J. ; van't Veer, P. - \ 2018
    Nutrition Bulletin 43 (2018)3. - ISSN 1471-9827 - p. 301 - 309.
    big data - consumers - diet - food - public health - research infrastructure

    Research on dietary intake and its determinants is crucial for an adequate response to the current epidemic of diet-related non-communicable chronic diseases. In order to respond to this challenge, the RICHFIELDS project was tasked with designing a research infrastructure (RI) that connects data on dietary intake of consumers in Europe, and its determinants, collected using apps and wearable sensors, from behavioural laboratories and experimental facilities and from other RIs. The main output of the project, an RI design, describes interfaces (portals) to collect data, a meta-database and a data-model to enable data linkage and sharing. The RICHFIELDS project comprises three phases, each consisting of three work packages, and an overarching methodological support work package. Phase 1 focused on data generated by consumers (e.g. collected by apps and sensors) relating to the purchase, preparation and consumption of food. Phase 2 focused on data generated by organisations such as businesses (e.g. retail data), government (e.g. procurement data) and experimental research facilities (e.g. virtual supermarkets). Phases 1 and 2 provided Phase 3 with insights on data types and design requirements, including the business models, data integration and management systems and governance and ethics. The final design will be used in the coming years to build an RI for the scientific research community, policy makers and businesses in Europe. The RI will boost interdisciplinary multi-stakeholder research through harmonisation and integration of data on food behaviour.

    Small-scale coastal fisheries in European Seas are not what they were: Ecological, social and economic changes
    Lloret, Josep ; Cowx, Ian G. ; Cabral, Henrique ; Castro, Margarida ; Font, Toni ; Gonçalves, Jorge M.S. ; Gordoa, Ana ; Hoefnagel, Ellen ; Matić-Skoko, Sanja ; Mikkelsen, Eirik ; Morales-Nin, Beatriz ; Moutopoulos, Dimitrios K. ; Muñoz, Marta ; Santos, Miguel Neves Dos; Pintassilgo, Pedro ; Pita, Cristina ; Stergiou, Konstantinos I. ; Ünal, Vahdet ; Veiga, Pedro ; Erzini, Karim - \ 2018
    Marine Policy 98 (2018). - ISSN 0308-597X - p. 176 - 186.
    Coastal, small-scale fisheries (SSF), whether artisanal (professional) or recreational, represent important socioeconomic activities across Europe that are currently undergoing a number of changes. This paper reviews and analyses the drivers of these changes, and makes recommendations for the future management of SSF. From the biological standpoint, the use of fishing gears that actively select certain species, sizes and sexes, the deployment of fishing gears on certain fragile habitats, the loss of fishing gears and the use of non-native species as bait are examples of how SSFs can threaten the sustainability of vulnerable coastal species and habitats. From a socioeconomic perspective, several factors are altering the traditional characteristics of coastal SSF. Among the most important is the growth of recreational fisheries in coastal waters and the disappearance of traditional low technology fisheries or their substitution by more mechanised, technical fisheries, which is leading to a loss of the traditional ecological knowledge held by artisanal fishers. On the other hand, the increasing competition between artisanal and recreational fisheries, and between them and commercial fishing operations, are also altering the classical features of coastal fisheries in some European countries. SSFs must adapt to the requirements of the new Common Fisheries Policy (CFP), namely management based on Maximum Sustainable Yield (MSY), multi-annual management plans and ecosystem based principles. It is concluded that it is necessary to integrate different assessment approaches (biological, social and economic), with active participation from stakeholders, governments and relevant research institutions, to better evaluate and manage coastal fisheries.
    Report on IC options : deliverable D8.2
    Mikkelsen, Bent Egberg ; Ofei, Kwabena Titi ; Hondo, Haris ; Kaunisto, Erik ; Hieke, Sophie ; Zimmermann, K.L. ; Veer, P. van 't - \ 2017
    EU - 3 p.
    Report on 4 cases stakeholder workshop : deliverable D8.3
    Ofei, Kwabena Titi ; Mikkelsen, Bent Egberg ; Hondo, Haris ; Kaunisto, Erik ; Hieke, Sophie ; Zimmermann, K.L. ; Veer, P. van 't - \ 2017
    EU - 4 p.
    User requirements’ specification : deliverable D11.1
    Koroušić Seljak, B. ; Eftimov, T. ; Korošec, P. ; Finglas, P. ; Astley, S. ; Egberg Mikkelsen, B. ; Roe, M. ; Berry, R. ; Costa Requena, J. ; Todor, G. ; Mendes, S. ; Carr, I. ; Timotijević, L. ; Poppe, K.J. ; Zimmermann, K.L. ; Veer, P. van 't - \ 2017
    EU - 4 p.
    Integrated report of WP10 activities for Synthesis Report of Task 4.2 - Communicative exchange with consortium and stakeholders : deliverable D10.4
    Hieke, Sophie ; Bucher, Tamara ; Mikkelsen, Bent E. ; Finglas, Paul ; Puttelaar, J. van den; Zimmermann, K.L. ; Poppe, K.J. - \ 2017
    EU - 17 p.
    Report on case studies : deliverable D8.1
    Mikkelsen, Bent Egberg ; Ofei, Kwabena Titi ; Hondo, Haris ; Kaunisto, Erik ; Zimmermann, K.L. ; Veer, P. van 't - \ 2017
    EU - 32 p.
    Position document ‘Laboratories and research facilities in the field of food and health consumer behaviour and lifestyle’ : deliverable D10.1
    Hieke, Sophie ; Bucher, Tamara ; Mikkelsen, Bent E. ; Finglas, Paul ; Puttelaar, J. van den; Zimmermann, K.L. ; Veer, P. van 't - \ 2017
    EU - 33 p.
    Paper on quality criteria and overview of criteria applied to available data/methods – WP5 (Report on the paper intended for publication, titled: “Food purchase data for mHealth research: A dynamic search inventory and analysis of applications”) : deliverable D5.4
    Kaunisto, Erik ; Hondo, Haris ; Normann, Anne ; Zimmermann, K.L. ; Veer, P. van 't; Mikkelsen, Bent Egberg - \ 2017
    EU - 23 p.
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