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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Verzuring van loofbossen op droge zandgronden en herstelmogelijkheden door steenmeeltoediening
Vires, Wim de; Weijters, Maaike ; Jong, Anjo de; Delft, Bas van; Bloem, Jaap ; Burg, Arnold van den; Duinen, Gert-Jan van; Verbaarschot, Evi ; Bobbink, Roland - \ 2019
Driebergen : VBNE, Vereniging van Bos- en Natuurterreineigenaren - 138
Can multi-use of the sea be safe? A framework for risk assessment of multi-use at sea
Hoof, L. van; Burg, S.W.K. van den; Banach, J.L. ; Röckmann, C. ; Goossen, M. - \ 2019
Ocean & Coastal Management (2019). - ISSN 0964-5691
Multi-use at sea - Risk assessment - Risk governance - Seaweed production - Wind farms

By 2050 the world population is expected to reach 10 billion people. This population needs food, water and energy. Increasingly, opportunities are sought out at sea to accommodate these needs. As there is already competition for space, especially in the near-shore, opportunities for multi-use, including the combination of, for example, food and energy production in a single location, are sought. One issue that needs to be addressed to allow for multi-use at sea is safety. Existing frameworks for (marine) risk assessment tend to be rather sector specific and, although existing models and frameworks for risk analysis provide useful elements for an integrated analysis, none of the approaches fully caters for the need of having a framework based on a cyclical process of stakeholder input in all steps of the process of risk identification, risk management and risk evaluation and communication, identifying actions to be taken and providing tools useful in each of the steps, while integrating the three perspectives of maritime safety, food (and feed) safety, and environmental impact assessment and the different perspectives of the actors involved. This study developed a common framework for the risk assessment of multi-use at sea, consisting of six steps (Exploring, Understanding, Appraising, Deciding, Implementing and Evaluating & Communication). The framework encompasses and integrates an analysis of food and feed safety aspects, the safety of people and equipment, and environmental safety aspects. For each step, actions are defined, tools that can be of help to stakeholders are presented, and stakeholder participation measures are described. The framework is iterative and dynamic in its nature; with constant communication and evaluation of progress, decisions can be taken to either take a step forward or back. The framework is developed to assist operators and producers, policymakers, and other stakeholders in assessing and managing risks of multi-use at sea.

A Food System Approach to Evaluate the Use of Seaweeds for Ecological Intensification of Aquaculture
Burg, S.W.K. van den; Hamon, K.G. ; Bernard, Miriam ; Janssen, K.P.E. ; Debrot, A.O. - \ 2019
In: Ecological intensification: A new paragon for sustainable aquaculture. - IPB Press - ISBN 9786024409456 - p. 50 - 51.
Reducing unnecessary vitamin testing in general practice : Barriers and facilitators according to general practitioners and patients
Hofstede, H. ; Burg, H.A.M. Van Der; Mulder, B.C. ; Bohnen, A.M. ; Bindels, P.J.E. ; Wit, N.J. de; Schepper, E.I.T. de; Vugt, S.F. Van - \ 2019
BMJ Open 9 (2019)10. - ISSN 2044-6055
Diagnostic tests [Mesh] - General practice [Mesh] - Qualitative Research [Mesh] - Vitamin B 12 [Mesh] - Vitamin D [Mesh]

Objective There has been an increase in testing of vitamins in patients in general practice, often based on irrational indications or for non-specific symptoms, causing increasing healthcare expenditures and medicalisation of patients. So far, there is little evidence of effective strategies to reduce this overtesting in general practice. Therefore, the aim of this qualitative study was to explore the barriers and facilitators for reducing the number of (unnecessary) vitamin D and B 12 laboratory tests ordered. Design and setting This qualitative study, based on a grounded theory design, used semistructured interviews among general practitioners (GPs) and patients from two primary care networks (147 GPs, 195 000 patients). These networks participated in the Reducing Vitamin Testing in Primary Care Practice (REVERT) study, a clustered randomized trial comparing two de-implementation strategies to reduce test ordering in primary care in the Netherlands. Participants Twenty-one GPs, with a maximum of 1 GP per practice who took part in the REVERT study, and 22 patients (who were invited by their GP during vitamin-related consultations) were recruited, from which 20 GPs and 19 patients agreed to participate in this study. Results The most important factor hampering vitamin-test reduction programmes is the mismatch between patients and medical professionals regarding the presumed appropriate indications for testing for vitamin D and B 12. In contrast, the most important facilitator for vitamin-test reduction may be updating GPs' knowledge about test indications and their awareness of their own testing behaviour. Conclusion To achieve a sustainable reduction in vitamin testing, guidelines with clear and uniform recommendations on evidence-based indications for vitamin testing, combined with regular (individual) feedback on test-ordering behaviour, are needed. Moreover, the general public needs access to clear and reliable information on vitamin testing. Further research is required to measure the effect of these strategies on the number of vitamin test requests.

Towards sustainable European seaweed value chains: a triple P perspective
Burg, S.W.K. van den; Dagevos, H. ; Helmes, R.J.K. - \ 2019
ICES Journal of Marine Science (2019). - ISSN 1054-3139
Seaweeds are seen as important future feedstock for Europe, providing biomass for food, feed, and other applications. Seaweeds can contribute to a circular food system a protein transition and bio-based economy. Europe is a minor player in the world market dominated by the Asian producers and processors. According to the FAO, total production of aquatic plants (dominated by seaweed) was 30 million tonnes in 2016, with China (47.9%) and Indonesia (38, 7%) dominating production. This article discusses the challenges to seaweed production and use in Europe and formulates future directions for upscaling the European seaweed sector. From a People, Planet, Profit perspective, there is no need to focus on producing large volumes of seaweed per se. We need to focus on nature-inclusive production systems, producing the right amount of the right seaweeds, based on the carrying capacity of the European seas. The seaweed sector must avoid developing along the “old” economy’s way of cost leadership but develop along the way of the “new” circular economy. Seaweeds should not be seen as a new product “added” to the market but become an integral part of the European food system, being used for human consumption, feed and improving production processes
European Seaweed Value Chains in an International Perspective
Burg, S.W.K. van den; Skirtun, Maggie ; Bernard, Miriam - \ 2019
Glastuinbouwondernemers positief over duurzaam telen, maar hebben zorgen over de haalbaarheid
Lauwere, Caroline de; Burg, Simone van der; Splinter, Gerben - \ 2019
Glastuinbouwondernemers over ondernemen in tijden van transitie : beelden, verwachtingen en onzekerheden
Lauwere, Carolien de; Burg, Simone van der; Splinter, Gerben - \ 2019
Wageningen : Wageningen Economic Research (Wageningen Economic Research rapport 2019-093) - ISBN 9789463950824 - 97
Horticulturists are prepared to move towards fossil-free production methods, and a number of them are currently working on this. However, they do not believe that entirely fossil-free production is possible. They view gas as a reliable energy source and question whether other energy sources will always be available, supply sufficient heat, can provide the required energy during peak load hours and whether there will be enough CO2 available for their crops. They also wonder whether the technology has reached maturity. A lack of perspective for action to produce without using fossil fuels is an often-noted obstacle. Horticulturists therefore want to produce without using fossil fuels, but feel as if they cannot do so. Horticulturists are also open to residue-free cultivation (meaning without the use of chemical crop protection). The main problem here is that the horticulturists are not allowed to use the necessary protection products. There are not enough alternatives available, and crop protection products that are authorised for use on other types of crops or abroad are not authorised for use on the crops of the Dutch horticulturists in question. They are worried that they have no means to intervene in the event of an emergency, such as outbreaks of pests.
Verkennende studie naar prikkels voor gedragsverandering naar duurzaam bodemkoolstofbeheer : een literatuurstudie en acht interviews met akkerbouwers en melkveehouders
Lauwere, Carolien de; Burg, Simone van der - \ 2019
Den Haag : Wageningen Economic Research (Wageningen Economic Research rapport 2019-034) - ISBN 9789463950626 - 45
Eight in-depth interviews with ten arable farmers and dairy farmers show that they are positive about managing soil organic matter to capture carbon in the soil. In their opinion, the main obstacles to taking measures – or taking more measures – are the lack of specific knowledge about how proposed measures meet the needs of the farm's particular type of soil. Incentives for these farmers could aim to provide financial and institutional scope to conduct experiments to develop this 'soil-specific' knowledge for their own farms. In such cases, the farmers' own networks (peer groups) can be used to learn together and to exchange experiences.
‘Oranje Boven’ in de vishandel, maar met steeds minder Noordzeevis
Hoekstra, F.F. - \ 2019
Den Haag : Wageningen Economic Research
Bezoekers konden er niet omheen; drie dagen lang wapperde de Nederlandse vlag bij vele Nederlandse visbedrijven op de Seafood Expo in Brussel. Geert Hoekstra, Sander van den Burg en Maggie Skirtun, onderzoekers 'visserij en aquacultuur' bij Wageningen Economic Research bezochten de Seafood Expo in Brussel van 7 tot 9 mei. Dat is 's werelds grootste beurs voor handel en verwerking van visproducten. Vervolgens bezochten Hoekstra en Skirtun in Zaragoza een workshop van de FAO over 'Seafood Value Chain Analysis' van 13 tot en met 17 mei.
Nationale Milieudag 2019
Burg, Sander van den - \ 2019
Workshop over zeewier. Licht op groen voor de zee­boerderij
Sessie 1A - Seagriculture - voedsel­productie op zee
Maar liefst 70% van het aardoppervlak bestaat uit water. Anders dan velen verwachten, liggen juist hier tal van mogelijkheden voor voedselproductie met geen of geringe milieu-impact. Met name zeewier biedt veel potentie. Kan dit zeegewas zich ontwikkelen tot de aardappel van de toekomst?
Steenmeel en natuurherstel: een gelukkige relatie of een risicovolle combinatie?
Diggelen, R. van; Bergsma, Huig ; Bijlsma, R.J. ; Bobbink, Roland ; Burg, A. Van den; Sevink, J. ; Siebel, H.N. ; Siepel, H. ; Vogels, J. ; Vries, W. de; Weijters, Maaike - \ 2019
Vakblad Natuur Bos Landschap (2019)155. - ISSN 1572-7610 - p. 20 - 23.
Sinds het midden van de vorige eeuw heeft de Nederlandsenatuur te lijden gehad van overmatige zuur- en stikstofdepositie. Maatregelen om de effecten hiervan te bestrijden, leidden niet altijd tot het gewenste resultaat en hadden soms dermate sterke neveneffecten dat ze eerder ongewenst waren. Sinds kort is steenmeel in beeld als middel dat mogelijk wel de positieve effecten maar niet de neveneffecten heeft. Kennis over de effecten vansteenmeel op gedegradeerde natuur en bos is echter nog lang geen gemeengoed. Op 18 februari 2019 organiseerden de VBNE en het OBN Deskundigen team Droog zandlandschap een discussiedag voor onderzoekers en andere direct betrokkenen rond het onderwerp “Steenmeel als herstelmaatregel” om kennis, inzichten en onzekerheden rond dit thema uit te wisselen en mogelijke richtlijnen te bespreken voor een eventuele toepassing van steenmeel als herstelmaatregel in natuurgebieden.
Prospects for upgrading european seaweeds; a value chain perspective
Burg, S.W.K. van den; Selnes, T. ; Dias, Ana ; Alves, Liliana ; Nuhoff-Isakhanyan, Gohar ; Helmes, Roel ; Daniel, Ana - \ 2019
In: Seaweeds: from tradition to innovation! 23rd international seaweed symposium. - - p. 137 - 138.
Ethics of smart farming : Current questions and directions for responsible innovation towards the future
Burg, Simone van der; Bogaardt, Marc Jeroen ; Wolfert, Sjaak - \ 2019
NJAS Wageningen Journal of Life Sciences (2019). - ISSN 1573-5214
Data ownership - Data sharing - Ethics - Open access - Power distribution - Smart farming - Societal impacts

Sensors, drones, weather satellites and robots are examples of technologies that make farming ‘smart’. In this article we present the results of our review of the literature that concerns the ethical challenges that smart farming raises. Our reading suggests that current ethical discussion about smart farming circles around three themes: (1) data ownership and access, (2) distribution of power and (3) impacts on human life and society. Discussions that fall under these themes have however not yet reached a satisfying conclusion, as there seem to be different ideas at work in the background regarding the purpose and function of digital farms in society. The pros and cons of these rivalling ideas are rarely foregrounded in the discussion. We suggest that future research should focus first on the content of these goals, especially on the content of societal and commercial goals and whether and how they can be combined in differing contexts. This will offer a lead to think about what data ought to be shared with whom, to set preconditions for trust between stakeholders and –eventually- develop appropriate guidelines and codes of conduct for future farming digitalization trajectories.

Development of Offshore Seaweed Cultivation : food safety, cultivation, ecology and economy : synthesis report 2018
Jansen, H.M. ; Tonk, Linda ; Werf, A. van der; Meer, I. van der; Tuinen, S. van; Burg, S. van der; Veen, J. ; Bronswijk, L. ; Brouwers, E. - \ 2019
IJmuiden : Wageningen Marine Research (Wageningen Marine Research report C012/19) - 17
Economic prospects for large-scale seaweed cultivation in the North Sea
Burg, Sander van den; Wakenge, Cito ; Berkhout, Petra - \ 2019
Wageningen : Wageningen Economic Research (Wageningen Economic Research momorandum 2019-012) - 19
The North Sea Farm Foundation pioneers seaweed cultivation in the North Sea. This project addresses the economic prospects of up-scaled production of seaweed, looking at production costs only. Scenarios for future large-scale seaweed production are formulated and evaluated using the EnAlgae economic model. Additionally, Monte Carlo analysis is performed. Based on the findings, we conclude that a significant cost reduction seems possible, with expected cost prices down to €1,200 per ton DM. If all goes well, relatively low-value markets such as the alginate market are within reach. More realistically, a mix of low- and medium-value markets is needed to cover the costs of seaweed production in the North Sea. Current developments show that these markets exist; especially in the food market where seaweeds can be promoted as organic, sustainable and fair trade.
Stel je voor dat Nederland grootschalig zeewier voor de kust gaat telen
Burg, S.W.K. van den - \ 2019
Nexus interventions for small tropical islands: case study Bonaire
Geest, Matthijs van der; Slijkerman, D.M.E. ; Mücher, C.A. ; Debrot, A.O. ; Burg, S.W.K. van den; Dominguez Teles, I. ; Henkens, R.J.H.G. ; Ghasemi, Nafiseh ; Kramer, H. ; Meijninger, W.M.L. ; Lotz, L.A.P. - \ 2019
Wageningen Marine Research - 85 p.
Nexus interventions for small tropical islands: case study Bonaire : Food from the Oceans
Debrot, A.O. ; Burg, S.W.K. van den - \ 2019
Wageningen Marine Research - 9 p.
Valuing biomarker diagnostics for dementia care: enhancing the reflection of patients, their care-givers and members of the wider public
Burg, Simone van der; Schreuder, Floris H.B.M. ; Klijn, Catharina J.M. ; Verbeek, Marcel M. - \ 2019
Medicine, Health Care and Philosophy 22 (2019)3. - ISSN 1386-7423 - p. 439 - 451.
Care - Cure - Dementia - Early diagnostics - Ethics - Stakeholder discussion

What is the value of an early (presymptomatic) diagnosis of dementia in the absence of effective treatment? There has been a lively scholarly debate over this question, but until now (future) patients have not played a large role in it. Our study supplements biomedical research into innovative diagnostics with an exlporation of its meanings and values according to (future) patients. Based on seven focusgroups with (future) patients and their care-givers, we conclude that stakeholders evaluate early diagnostics with respect to whether and how they expect it to empower their capacity to (self-) care. They value it, for instance, with respect to whether it (a) explains experienced complaints, (b) allows to start a process of psychological acceptance and social adaptation to the expected degeneration, (c) contributes to dealing with anxieties (with respect to inheritable versions of dementia), (d) informs adequately about when to start preparing for the end of life, (d) informs the planning of a request for euthanasia, or (e) allows society to deal with a growing amount of dementia patients. Our study suggests that information about disease is considered ‘harmful’ or ‘premature’ when recipients feel unable to act on that information in their (self-) care. The results of this research offers input to further ethical research. It invites to adopt a care perspective in evaluation and to seek ways to prevent the ‘harm’ that such diagnostic methods can bring about.

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