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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    Roadmap for naming uncultivated Archaea and Bacteria
    Murray, Alison E. ; Freudenstein, John ; Gribaldo, Simonetta ; Hatzenpichler, Roland ; Hugenholtz, Philip ; Kämpfer, Peter ; Konstantinidis, Konstantinos T. ; Lane, Christopher E. ; Papke, R.T. ; Parks, Donovan H. ; Rossello-Mora, Ramon ; Stott, Matthew B. ; Sutcliffe, Iain C. ; Thrash, J.C. ; Venter, Stephanus N. ; Whitman, William B. ; Acinas, Silvia G. ; Amann, Rudolf I. ; Anantharaman, Karthik ; Armengaud, Jean ; Baker, Brett J. ; Barco, Roman A. ; Bode, Helge B. ; Boyd, Eric S. ; Brady, Carrie L. ; Carini, Paul ; Chain, Patrick S.G. ; Colman, Daniel R. ; DeAngelis, Kristen M. ; Rios, Maria Asuncion de los; Estrada-de los Santos, Paulina ; Dunlap, Christopher A. ; Eisen, Jonathan A. ; Emerson, David ; Ettema, Thijs J.G. ; Eveillard, Damien ; Girguis, Peter R. ; Hentschel, Ute ; Hollibaugh, James T. ; Hug, Laura A. ; Inskeep, William P. ; Ivanova, Elena P. ; Klenk, Hans Peter ; Li, Wen Jun ; Lloyd, Karen G. ; Löffler, Frank E. ; Makhalanyane, Thulani P. ; Moser, Duane P. ; Nunoura, Takuro ; Palmer, Marike ; Parro, Victor ; Pedrós-Alió, Carlos ; Probst, Alexander J. ; Smits, Theo H.M. ; Steen, Andrew D. ; Steenkamp, Emma T. ; Spang, Anja ; Stewart, Frank J. ; Tiedje, James M. ; Vandamme, Peter ; Wagner, Michael ; Wang, Feng Ping ; Hedlund, Brian P. ; Reysenbach, Anna Louise - \ 2020
    Nature Microbiology 5 (2020). - ISSN 2058-5276 - p. 987 - 994.

    The assembly of single-amplified genomes (SAGs) and metagenome-assembled genomes (MAGs) has led to a surge in genome-based discoveries of members affiliated with Archaea and Bacteria, bringing with it a need to develop guidelines for nomenclature of uncultivated microorganisms. The International Code of Nomenclature of Prokaryotes (ICNP) only recognizes cultures as ‘type material’, thereby preventing the naming of uncultivated organisms. In this Consensus Statement, we propose two potential paths to solve this nomenclatural conundrum. One option is the adoption of previously proposed modifications to the ICNP to recognize DNA sequences as acceptable type material; the other option creates a nomenclatural code for uncultivated Archaea and Bacteria that could eventually be merged with the ICNP in the future. Regardless of the path taken, we believe that action is needed now within the scientific community to develop consistent rules for nomenclature of uncultivated taxa in order to provide clarity and stability, and to effectively communicate microbial diversity.

    Assessing heavy metal pollution by biomonitoring honeybee nectar in Córdoba (Spain)
    Gutiérrez, Miriam ; Molero, Rafael ; Gaju, Miquel ; Steen, Josef van der; Porrini, Claudio ; Ruiz, José Antonio - \ 2020
    Environmental Science and Pollution Research 27 (2020). - ISSN 0944-1344 - p. 10436 - 10448.
    Bioindication - Biomonitoring - Heavy metals - Honeybee - Nectar - Pollution

    Nectar of honeybee colonies has been used in order to identify heavy metals and establish the benefit of this type of studies as a tool for environmental management. For these goals, samples of nectar were obtained from Apis mellifera hives placed in the city of Córdoba (Spain) and its surroundings. Five stations (each with two hives) were selected and samples were collected from May to July of 2007, 2009 and 2010. Concentrations of Pb, Cr, Ni and Cd in nectar were determined by graphite furnace atomic absorption spectrophotometry. Substantial spatial and temporal differences were detected and compared with the values found in bee bodies in a previously published study based on samples obtained simultaneously with those presented in this work. Upper reference thresholds established for this investigation were surpassed frequently by the measures obtained, being Cr (21.43% of samples), stations S3 (22.22%) and S4 (11.12%) year 2009 (22.22%) and the month of July (23.68%) the metal, the locations and the periods that exceeded more times these references. Regarding the Cd, which was studied only in 2010, 33.33% of the nectar samples exceeded the upper reference thresholds. Comparing the biomonitoring of bee bodies and nectar, some coincidences were found, although they showed different results for highest worrisome values of metal, station and year. This suggests that both methods can give complementary information in the surveillance systems of atmospheric pollution.

    Het INSIGNIA project : Bijenvolken als levende snuffelpaal
    Roessink, I. ; Steen, J.J.M. van der - \ 2019
    Bijenhouden 2019 (2019)4. - ISSN 1877-9786 - p. 22 - 23.
    Designing intercrops for high yield, yield stability and efficient use of resources: Are there principles?
    Stomph, Tjeerd Jan ; Dordas, Christos ; Baranger, Alain ; Rijk, Joshua de; Dong, Bei ; Evers, Jochem ; Gu, Chunfeng ; Li, Long ; Simon, Johan ; Jensen, Erik Steen ; Wang, Qi ; Wang, Yuyun ; Wang, Zishen ; Xu, Huasen ; Zhang, Chaochun ; Zhang, Lizhen ; Zhang, Wei Ping ; Bedoussac, Laurent ; Werf, Wopke van der - \ 2019
    In: Advances in Agronomy Academic Press Inc. (Advances in Agronomy ) - p. 1 - 50.
    Biotic stresses - Cropping system design - Light - Nutrients - Product quality - Resource use efficiency - Water

    Intercropping is the simultaneous cultivation of plant species in the same field for a considerable proportion of their growing periods. Interest in intercropping for sustainable agriculture is on the rise and the number of scientific studies on intercropping is strongly increasing. Here we assess the current status of knowledge on factors that determine yield, yield stability and resource use efficiency of intercropping as compared to sole cropping. Distinguishing resource use into acquisition and conversion shows that intercrops are mainly improving acquisition rather than conversion efficiency. We also make an attempt to quantify the importance of reduced biotic stresses through pests, diseases, and weeds. We particularly focus on blank spots in the knowledge and possible bias in existing literature and ask which research approaches are needed to advance the field and pave the way for a wider usage of intercropping in modern sustainable agriculture.

    Halvering veestapel geen oplossing stikstofprobleem
    Migchels, G. - \ 2019
    Integrated pollution prevention and control for the municipal water cycle in a river basin context: validation of the three-step strategic approach
    Galvis Castaño, Alberto - \ 2019
    Wageningen University. Promotor(en): H.J. Gijzen, co-promotor(en): N.P. van der Steen. - Leiden : CRC Press/Balkema - ISBN 9780367375270 - 200

    The protection of water resources from deterioration in quality from pollution discharges has become one of the biggest challenge in sustainable water resources management in recent decades. In practice, most countries have adopted pollution control strategies and measures which are based on ‘end-of-pipe’ solutions, i.e. wastewater treatment plants and adjustments to the regulations, including taxes for wastewater discharges (Conventional Strategy). This approach involves very high costs, and it has in many cases has been a complete failure. The research described in this book contributes to the development of sustainable solutions for the previously outlined problem. It is based on the validation of the Three-Step Strategic Approach concept (3-SSA), which includes: 1) prevention or minimisation of waste production; 2) treatment aimed at recovery and reuse of waste components, and 3) polishing of remaining waste by stimulation of natural self-purification of receiving water body. The study on wastewater management in the Upper Cauca river basin (389 km), the second most important river in Colombia, shows overall positive effects of the 3-SSA, in comparison of Conventional Strategy. The Cost Benefit Analysis clearly favoured the 3-SSA, generating a major positive impact on the river water quality at lower cost compared to the Conventional Strategy.

    Comparison of Pesticide Exposure in Honey Bees (Hymenoptera : Apidae) and Bumble Bees (Hymenoptera: Apidae): Implications for Risk Assessments
    Gradish, Angela E. ; Steen, Jozef Van Der; Scott-Dupree, Cynthia D. ; Cabrera, Ana R. ; Cutler, G.C. ; Goulson, Dave ; Klein, Olaf ; Lehmann, David M. ; Lückmann, Johannes ; O'Neill, Bridget ; Raine, Nigel E. ; Sharma, Bibek ; Thompson, Helen - \ 2019
    Environmental Entomology 48 (2019)1. - ISSN 0046-225X - p. 12 - 21.
    bumble bee - honey bee - pesticide exposure - risk assessment

    To date, regulatory pesticide risk assessments have relied on the honey bee (Apis mellifera L.) (Hymenoptera: Apidae) as a surrogate test species for estimating the risk of pesticide exposure to all bee species. However, honey bees and non-Apis bees may differ in their susceptibility and exposure to pesticides. In 2017, a workshop ('Pesticide Exposure Assessment Paradigm for Non-Apis Bees') was held to assess if honey bee risk assessment frameworks are reflective of non-Apis bee pesticide exposure. In this article, we summarize the workshop discussions on bumble bees (Bombus spp.). We review the life history and foraging behavior of bumble bees and honey bees and discuss how these traits may influence routes and levels of exposure for both taxa. Overall, the major pesticide exposure routes for bumble bees and honey bees are similar; however, bumble bees face additional exposure routes (direct exposure of foraging queens and exposure of larvae and adults to soil residues). Furthermore, bumble bees may receive comparatively higher pesticide doses via contact or oral exposure. We conclude that honey bee pesticide risk assessments may not always be protective of bumble bees, especially queens, in terms of exposure. Data needed to reliably quantify pesticide exposure for bumble bees (e.g., food consumption rates, soil residue levels) are lacking. Addressing these knowledge gaps will be crucial before bumble bee exposure can be incorporated into the pesticide risk assessment process. Because bumble bees exhibit appreciable interspecific variation in colony and behavioral characteristics, data relevant to pesticide exposure should be generated for multiple species.

    Varroabestrijding op stand deel 3: Er zijn veel wegen naar Rome
    Steen, J.J.M. van der; Vejsnaes, F. - \ 2019
    Bijenhouden 13 (2019)1. - ISSN 1877-9786 - p. 20 - 21.
    Participation through place-based e-tools: A valuable resource for urban green infrastructure governance?
    Steen Møller, Maja ; Olafsson, Anton ; Vierikko, Kati ; Sehested, Karina ; Elands, Birgit ; Buijs, Arjen ; Konijnendijk van den Bosch, Cecil - \ 2019
    Urban Forestry and Urban Greening 40 (2019). - ISSN 1618-8667 - p. 245 - 253.
    Digital tools - E-tools - Participatory governance - Place - Urban Green space

    Digital communication tools for information sharing are being increasingly used in governance, including green space governance and natural resource management and planning. Citizens’ resources in the form of knowledge, skills, as well as their collaboration with authorities have been identified in the governance literature as crucial elements in sustainable development. Technical advancement in internet communication technology (ICT) presents novel opportunities for engaging and leveraging civic knowledge and skills into different levels of governance. These options are still largely unexplored in governance research on urban green infrastructure (UGI). In this paper, we analyse three different digital tools (e-tools) from the perspective of a Scandinavian planning context. We explore how e-tools can support UGI governance and the perceived barriers. The e-tools explored are three digital platforms with a focus on public participation related to UGI. The three e-tools are map-based, i.e., users share information on digital maps: so-called Volunteered Geographic Information. Here, we call them place-based e-tools. We explore and analyse their adoption into UGI governance, the institutional contexts that affect them and also discuss potential of e-tools in place-based governance. Our findings indicate that the analysed tools all facilitate UGI governance in terms of engaging citizens in use, management, and planning of UGI. However, there are challenges to be aware of, such as the digital divide and the importance of clear participatory frameworks. We conclude that place-based e-tools have potential for UGI governance and that there is potential to strengthen links to ‘place’, while continuously testing and challenging new opportunities as technology rapidly develops.

    Mosaic governance for urban green infrastructure: Upscaling active citizenship from a local government perspective
    Buijs, Arjen ; Hansen, Rieke ; Jagt, Sander Van Der; Ambrose-Oji, Bianca ; Elands, Birgit ; Lorance Rall, Emily ; Mattijssen, Thomas ; Pauleit, Stephan ; Runhaar, Hens ; Stahl Olafsson, Anton ; Steen Møller, Maja - \ 2019
    Urban Forestry and Urban Greening 40 (2019). - ISSN 1618-8667 - p. 53 - 62.
    Compact urban development, social demands and austerity measures are increasing pressures on urban greenspace. Meanwhile, active citizens, defined as voluntary individuals or groups who self-organize to contribute to urban green space development, provide ecological and social benefits to urban societies. This has inspired local governments to seek collaborations with non-state actors, including active citizens. However, the diverging aims, place-specific focus, and varying expertise of active citizenship may inhibit its contribution to ecological connectivity and upscaling beyond the local scale.
    In this paper, we investigate how “mosaic governance” has potential as a framework for understanding active citizenship, its potential for upscaling and its relationship to strategic UGI planning. Using the policy arrangements approach, we analyse the role of discourse, resources, actors and rules of the game in the upscaling of active citizenship. Based on eight empirical cases from seven European cities, we analyse the diversity of collaborations between local governments and active citizens in greenspace development.
    The cases show how active citizens can significantly contribute to UGI planning and implementation, for example by developing large parks with volunteers or designing a network of green corridors. The cases reveal multiple ways citizens and local governments benefit from collaborations, as well as different pathways for upscaling innovative discourses and practices from local communities to formal policy or to other cities. To enable upscaling, UGI planning needs to combine long-term, more formalized and higher-scale strategic approaches with more incremental approaches that correspond with localized, fragmented and informal efforts of local communities. While collaborations between municipalities and active citizenship is not without its difficulties, the examples of upscaling in our cases demonstrate the transformative power active citizens may have towards a more green, just and democratic city.
    Varroabestrijding op stand deel 2: Organische zuren en thymol en biotechnische imkermethoden
    Steen, S. van der; Vejsnaes, F. - \ 2018
    Bijenhouden 12 (2018)6. - ISSN 1877-9786 - p. 20 - 22.
    In het bijenvolk heeft de mijt een kwetsbare positie op de bijen (de foretische mijt) en een relatief veilige plaats in het broed (de reproducerende mijt). Dit laatste is relatief want door de voorkeur voor darrenbroed is deze veilige plaats toch minder veilig voor de mijt. In een broedloos volk zijn alle mijten foretisch en dit is dan ook een ideale situatie om de mijt te bestrijden.
    Varrroabestrijding op stand deel 2: Organische zuren en thymol en biotechnische imkermethoden
    Steen, J.J.M. van der; Vejsnaes, F. - \ 2018
    Bijenhouden 2018 (2018). - ISSN 1877-9786
    Varroabestrijding op stand deel 1: Bestrijding strategieën
    Steen, J.J.M. van der; Vejsnaes, F. - \ 2018
    Bijenhouden 12 (2018)5. - ISSN 1877-9786 - p. 20 - 22.
    Een op maat gesneden varroabestrijding is, naast het zorgen voor een ruim en divers nectar- en stuifmeelaanbod, dé manier om wintersterfte terug te dringen. Of, voor de imker die ons driegangenmenu goed in de vingers heeft, zelfs geheel te voorkomen.1 Varroabestrijding (op maat gesneden voor de bijen) op stand is een aanpak die een stap verder gaat dan gewoon altijd bestrijden, nooit bestrijden of op willekeurige momenten bestrijden. Het gaat erom in te schatten wat het bijenvolk zelf kan en waarbij het de imker nodig heeft om de (altijd) aanwezige varroamijten de baas te blijven.
    Photo-Activated Sludge: a novel algal-bacterial biotreatment for nitrogen removal from wastewater
    Rada Ariza, Angélica - \ 2018
    Wageningen University. Promotor(en): P.N.L. Lens, co-promotor(en): P. van der Steen; C.M. Lopez Vazquez. - Leiden : CRC Press/Balkema - ISBN 9780367178864 - 324

    Nitrogen rich wastewaters (10-400 mg N L-1) are usually produced by municipal, industrial and agricultural wastes, such as effluents from anaerobic treatments. These represent a risk to the environment due to the high nutrient concentrations (nitrogen and phosphorous), which can cause eutrophication of water bodies, deteriorating the quality of the ecosystems. As a solution, the potential nitrogen removal capacity of a novel bio-treatment system, namely the Photo-Activated Sludge (PAS), which is composed of microalgae and bacteria consortia, is presented in this thesis. This novel bio-treatment is based on the symbiosis between microalgae, nitrifiers and heterotrophic bacteria (microalgal-bacterial consortia). Experimental work using photobioreactors for the cultivation of microalgae and bacteria under sequencing batch conditions showed that microalgal-bacterial consortia can remove ammonium 50% faster than solely microalgal consortia. The increase in ammonium removal rates was due to the action of nitrifying bacteria, supplied with oxygen produced by algae. Nitrification was the main ammonium removal mechanism within the microalgal-bacterial biomass, followed by algal uptake and nutrient requirements for bacterial growth. Carbon oxidation and denitrification were the main removal mechanisms for organic carbon. Hence, the role of algae within the microalgal-bacterial system is to provide oxygen to support the aerobic processes. The microalgal-bacterial system offers the possibility of reducing the hydraulic retention time, which can decrease the large area requirements often demanded by algal systems.

    Editorial: Algal technologies for wastewater treatment and resource recovery :
    Muñoz, Raul ; Temmink, Hardy ; Verschoor, Anthony M. ; Steen, Peter Van Der - \ 2018
    Water Science and Technology 78 (2018)1. - ISSN 0273-1223 - 2 p.
    Development of food fraud media monitoring system based on text mining
    Bouzembrak, Y. ; Steen, B. ; Neslo, R. ; Linge, J. ; Mojtahed, V. ; Marvin, H.J.P. - \ 2018
    Food Control 93 (2018). - ISSN 0956-7135 - p. 283 - 296.
    EMA - Food adulteration - HorizonScan - MedISys - RASFF

    Food fraud is receiving considerable attention with the growing body of literature that recognises its importance. No system exists that collects media reports on food fraud. In this study, we used the infrastructure provided by the European Media Monitor (EMM), in particular it's MedISys portal for this purpose. We developed a food fraud tool (MedISys-FF) that collects, processes and presents food fraud reports published world-wide in the media. MedISys-FF is updated every 10 min 24/7. Food fraud reports were collected with MedISys-FF for 16 months (September 2014 to December 2015) and benchmarked against food fraud reports published in Rapid Alert for Food and feed (RASFF), Economically Motivated Adulteration Database (EMA) and HorizonScan. The results showed that MedISys-FF collects food fraud publications with high relevance >75% and the top 4 most reported fraudulent commodities in the media were i) meat, ii) seafood, iii) milk and iv) alcohol. These top stories align with those found in RASFF and EMA but differences in frequency are apparent. Analysis of the collected articles can help understanding food fraud issues in the origin countries and can facilitate the development of control measures and to detect food fraud in the food supply chain.

    The Perfect Match: Simultaneous Strawberry Pollination and Bio-Sampling of the Plant Pathogenic Bacterium Erwinia pyrifoliae by Honey Bees Apis mellifera
    Steen, Sjef van der; Bergsma-Vlami, M. ; Wenneker, M. - \ 2018
    Sustainable Agriculture Research 7 (2018)1. - ISSN 1927-050X - p. 25 - 32.
    In this study we show that honey bee colonies placed in a greenhouse for pollination of strawberry can simultaneously be used to indicate the presence of the plant pathogenic bacterium Erwinia pyrifoliae. This was demonstrated by using two methods of qualitative sacrificial and non-sacrificial bio sampling of the honey bee colony. A novel method for non-sacrificial subsampling, named the Beehold device, was applied. Applying the Beehold device did not disturb or affect negatively the honey bee colony. The study demonstrated that the integration of pollination service and bio-sampling functioned. In the sacrificially derived honey bee subsamples, E. pyrifoliae was detected prior to any visible infection in the plant; however, E. pyrifoliae was detected via non-sacrificial sampling at the same time as plant infection was first observed. The Beehold device is a practical tool for monitoring plant pathogens via forager bees during flowering until fruit onset, but is not as sensitive as directly sampling honey bees.
    Lagere overleving bijenvolken tijdens afgelopen winter
    Steen, J.J.M. van der - \ 2017
    Nationaal programma Honing 2017 - 2019 : Bijenhouderij met toekomst: naar weerbare bijen en minder bijensterfte
    Dooremalen, J.A. van; Blacquiere, T. ; Cornelissen, A.C.M. ; Steen, J.J.M. van der - \ 2017
    Wageningen : Wageningen University & Research
    Report Honeybee Surveillance Program the Netherlands 2016 - 2017
    Biesmeijer, Koos ; Steen, J.J.M. van der - \ 2017
    Leiden : Naturalis - 50
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