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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    Mimicry of emergent traits amplifies coastal restoration success
    Temmink, Ralph J.M. ; Christianen, Marjolijn J.A. ; Fivash, Gregory S. ; Angelini, Christine ; Boström, Christoffer ; Didderen, Karin ; Engel, Sabine M. ; Esteban, Nicole ; Gaeckle, Jeffrey L. ; Gagnon, Karine ; Govers, Laura L. ; Infantes, Eduardo ; Katwijk, Marieke M. van; Kipson, Silvija ; Lamers, Leon P.M. ; Lengkeek, Wouter ; Silliman, Brian R. ; Tussenbroek, Brigitta I. van; Unsworth, Richard K.F. ; Yaakub, Siti Maryam ; Bouma, Tjeerd J. ; Heide, Tjisse van der - \ 2020
    Nature Communications 11 (2020)1. - ISSN 2041-1723

    Restoration is becoming a vital tool to counteract coastal ecosystem degradation. Modifying transplant designs of habitat-forming organisms from dispersed to clumped can amplify coastal restoration yields as it generates self-facilitation from emergent traits, i.e. traits not expressed by individuals or small clones, but that emerge in clumped individuals or large clones. Here, we advance restoration science by mimicking key emergent traits that locally suppress physical stress using biodegradable establishment structures. Experiments across (sub)tropical and temperate seagrass and salt marsh systems demonstrate greatly enhanced yields when individuals are transplanted within structures mimicking emergent traits that suppress waves or sediment mobility. Specifically, belowground mimics of dense root mats most facilitate seagrasses via sediment stabilization, while mimics of aboveground plant structures most facilitate marsh grasses by reducing stem movement. Mimicking key emergent traits may allow upscaling of restoration in many ecosystems that depend on self-facilitation for persistence, by constraining biological material requirements and implementation costs.

    Habitat banking and its challenges in a densely populated country : The case of the Netherlands
    Gorissen, Mechtilde M.J. ; Heide, C.M. van der; Schaminée, Johannes H.J. - \ 2020
    Sustainability 12 (2020)9. - ISSN 2071-1050
    Evolving human-nature relationships - Habitat banking - Integral area development - Nature compensation - Socialization of nature - Socio-ecological learning - Sustainable development - Voluntary compensation

    Due to a growing population, urbanization, industrialization and agriculture, the quality of nature and biodiversity globally has decreased enormously. This also applies to The Netherlands. Habitat banking is a market-based instrument for nature conservation and sustainable development to counteract this decrease. We analyze under which conditions habitat banking can indeed offer possibilities and opportunities for improving biodiversity, nature conservation and sustainable development in The Netherlands. For this, we first identify the shortcomings of mandatory nature compensation in The Netherlands and link them to current innovations in Dutch nature policy. In addition, we investigate three necessary instruments for a successful habitat banking system: (1) a system for nature valuation, (2) a method for creating ecological opportunity maps, and (3) the institutional setting in which habitat banking can be operationalized. We conclude that habitat banking contributes to solving the problems for nature and biodiversity and to sustainable development in The Netherlands, provided that this is primarily addressed (i) in the domain of voluntary nature compensation, (ii) in bottom-up pilots for integrated area development (in this article shortly referred to as area pilots) where the widest possible range of owners and users of these areas is involved, (iii) in a context of participatory decision-making and (iv) learning and experiment en route to social-ecological systems (SESs). To actually realize the added value of habitat banking for The Netherlands, further scientific research is required to collect and analyze empirical data from relevant stakeholders.

    Facilitating foundation species : The potential for plant–bivalve interactions to improve habitat restoration success
    Gagnon, Karine ; Rinde, Eli ; Bengil, Elizabeth G.T. ; Carugati, Laura ; Christianen, Marjolijn J.A. ; Danovaro, Roberto ; Gambi, Cristina ; Govers, Laura L. ; Kipson, Silvija ; Meysick, Lukas ; Pajusalu, Liina ; Tüney Kızılkaya, İnci ; Koppel, Johan van de; Heide, Tjisse van der; Katwijk, Marieke M. van; Boström, Christoffer - \ 2020
    Journal of Applied Ecology 57 (2020)6. - ISSN 0021-8901
    bivalves - co-restoration - ecosystem engineers - facilitation - habitat restoration - plant–bivalve interactions - salt marsh - seagrass

    Vegetated marine and freshwater habitats are being increasingly lost around the world. Habitat restoration is a critical step for conserving these valuable habitats, but new approaches are needed to increase restoration success and ensure their survival. We investigated interactions between plants and bivalves through a review and analysis of 491 studies, determined the effects, mechanisms and key environmental variables involved in and driving positive and negative interactions, and produced guidelines for integrating positive interactions into restoration efforts in different habitats. Fifty per cent of all interactions (both correlative and experimental studies) were positive. These were predominant between epifaunal bivalves and plants in all habitats, and between infaunal bivalves and plants in subtidal habitats. Plants primarily promoted bivalve survival and abundance by providing substrate and shelter, while bivalves promoted plant growth and survival by stabilizing and fertilizing the sediment, and reducing water turbidity. The prevalence of positive interactions increased with water temperature in subtidal habitats, but decreased with water temperature in intertidal habitats. The subset of studies conducted in a restoration context also showed mostly positive interactions. Twenty-five per cent of all interactions were negative, and these were predominant between plants and infaunal bivalves in intertidal habitats, except sulphide-metabolizing bivalves, which facilitated plant survival. Interactions involving non-native species were also mostly negative. Synthesis and applications. Promoting facilitative interactions through plant–bivalve co-restoration can increase restoration success. The prevalence of positive interactions depends on habitat and environmental conditions such as temperature, and was especially important in subtidal habitats (involving both infaunal and epifaunal bivalves) and in intertidal habitats (involving only epifaunal bivalves). Thus sites and species for co-restoration must be carefully chosen to maximize the chances of success. If done properly, co-restoration could increase initial survival, persistence and resilience of foundation species, and promote the recovery of associated biodiversity and ecosystem services.

    Green Challenges: systeemaanpak biologische plaagbestrijding met gebruik van functionele biodiversiteit : Deel 2: Eenjarige zomerbloeiers
    Kruidhof, Marjolein ; Bloemhard, Chantal ; Heide, Hessel van der; Catalá-Senent, Laura ; Shrestha, Kriti ; Messelink, Gerben ; Salm, Caroline van der - \ 2020
    Bleiswijk : Stichting Wageningen Research, Wageningen Plant Research, Business unit Glastuinbouw (Rapport WPR 942) - 85
    The low pest tolerance, the harvest of the complete plants, the short cropping cycle and the low cultivation temperature in annual flowers form a challenge for biological pest control. The goal of the here described research was to design and test a systems approach of pest control in annual flowers on the basis of functional biodiversity. As a first step, an overview has been made of the most important pest and natural enemy species, and the potential chances and challenges for a systems approach of pest control in annual flowers. The first experiments showed that alternating rows of aphid-sensitive and aphid-resistant annual flower species could slow down the spread of aphids. In a second experiment, the strategy around the population build-up of the predatory bug Macrolophus pygmaeus in successive cropping cycles was central. To build up a population of M. pygmaeus, it is important to already start during wintertime. Pelargonium sp. form, with the right choice of species and cultivar, a good host crop for the early establishment of a M. pygmaeus population. To be able to use this population effectively in spots where these predatory bugs are needed, as ‘transport’ system is required to move the predatory bugs around. This ‘transport’ system still needs to be further developed.
    First Field-Based Evidence That the Seagrass-Lucinid Mutualism Can Mitigate Sulfide Stress in Seagrasses
    Geest, Matthijs Van Der; Heide, Tjisse Van Der; Holmer, Marianne ; Wit, Rutger De - \ 2020
    Frontiers in Marine Science 7 (2020). - ISSN 2296-7745 - 13 p.
    seagrass - performance - environmental changen - sediment sulfide stress - seagrass-lucinid mutualism - lucinid bivalves - mutualistic
    Seagrass meadows form vital ecological components of coastal zones worldwide, but are rapidly declining. Large-scale seagrass diebacks have been related to accumulation of toxic sulfide in the sediment, a phenomenon predicted to occur more frequently in the near future due to ongoing global warming and increasing organic loading of coastal systems worldwide. Recently, a facultative mutualism between seagrasses and lucinid bivalves with endosymbiotic sulfide-consuming gill bacteria was discovered that may prevent toxic sulfide accumulation in seagrass sediments. Yet, direct field-based evidence for the importance of this mutualism in alleviating sulfide stress in seagrasses is currently lacking, as well as how its role may change when sediment sulfide levels increase due to environmental change. Here, we investigated the sulfide detoxification
    function of this seagrass-lucinid mutualism and its resilience to organic-loading induced sulfide stress in a temperate lagoon system (Thau lagoon, France), using a correlative field survey and a full factorial field experiment. The field survey revealed a strong positive correlation between seagrass above-ground biomass and lucinid densities, and pore water sulfide concentrations close to zero at all sites. Furthermore, the field experiment revealed that addition of organic matter (starch mixed with sucrose) increased sedimentary sulfide intrusion into seagrass (Zostera noltei) leaves (a proxy for sulfide stress), while experimentally enhanced lucinid densities reduced sulfide intrusion, regardless of addition of organic matter. Moreover, addition of organic matter reduced seagrass rhizome biomass and increased pore water sulfide levels, lucinid tissue sulfur content, lucinid condition (expressed as flesh/shell dry weight ratio), and total lucinid
    biomass, while enhancement of lucinid densities reduced lucinid condition. These results provide the first field-based evidence that lucinid bivalves and their sulfide-oxidizing gill symbionts mitigate sulfide stress in seagrasses, and suggests that the dependence of seagrass on this seagrass-lucinid mutualism will increase under conditions of enhanced sediment sulfide production, as predicted for the near future. Therefore, we suggest that awareness of the ecological importance of the seagrass-lucinid mutualism may be instrumental for designing new measures for improving long-term restoration success and seagrass resilience to global change.
    Predicting survival in dairy cattle by combining genomic breeding values and phenotypic information
    Heide, E.M.M. van der; Veerkamp, R.F. ; Pelt, M.L. van; Kamphuis, C. ; Ducro, B.J. - \ 2020
    Journal of Dairy Science 103 (2020)1. - ISSN 0022-0302 - p. 556 - 571.
    dairy cow - individual prediction - longevity - survival

    Advances in technology and improved data collection have increased the availability of genomic estimated breeding values (gEBV) and phenotypic information on dairy farms. This information could be used for the prediction of complex traits such as survival, which can in turn be used in replacement heifer management. In this study, we investigated which gEBV and phenotypic variables are of use in the prediction of survival. Survival was defined as survival to second lactation, plus 2 wk, a binary trait. A data set was obtained of 6,847 heifers that were all genotyped at birth. Each heifer had 50 gEBV and up to 62 phenotypic variables that became gradually available over time. Stepwise variable selection on 70% of the data was used to create multiple regression models to predict survival with data available at 5 decision moments: distinct points in the life of a heifer at which new phenotypic information becomes available. The remaining 30% of the data were kept apart to investigate predictive performance of the models on independent data. A combination of gEBV and phenotypic variables always resulted in the model with the highest Akaike information criterion value. The gEBV selected were longevity, feet and leg score, exterior score, udder score, and udder health score. Phenotypic variables on fertility, age at first calving, and milk quantity were important once available. It was impossible to predict individual survival accurately, but the mean predicted probability of survival of the surviving heifers was always higher than the mean predicted probability of the nonsurviving group (difference ranged from 0.014 to 0.028). The model obtained 2.0 to 3.0% more surviving heifers when the highest scoring 50% of heifers were selected compared with randomly selected heifers. Combining phenotypic information and gEBV always resulted in the highest scoring models for the prediction of survival, and especially improved early predictive performance. By selecting the heifers with the highest predicted probability of survival, increased survival could be realized at the population level in practice.

    Nederlands milieubeleid is breder dan belastingprikkels
    Woltjer, G.B. ; Rijk, P.J. ; Heide, C.M. van der - \ 2019
    Rural Resilience as a New Development Concept
    Heijman, Wim ; Hagelaar, Geoffrey ; Heide, Martijn van der - \ 2019
    In: EU Bioeconomy Economics and Policies / Dries, L., Heijman, W., Jongeneel, R., Purnhagen, K., Wesseler, J., Cham : Palgrave (Palgrave Advances in Bioeconomy: Economics and Policies ) - ISBN 9783030286415 - p. 195 - 211.
    This chapter aims to apply the ecological concept of ‘resilience’ to the socio-economic development of the rural region. It argues that two elements are crucial for and prerequisite to ‘rural resilience’: (1) regional specialisation and, connected with that, the development of regional clusters; and (2) the regional ability to transform. In our view rural resilience is shaped within the context of social, economic and environmental (biophysical) possibilities and constraints. This means that ‘rural resilience’ is inextricably connected to the design of the rural landscape; that is, landscape design and spatial organisation determine and influence ‘rural resilience’. In this chapter, we focus on two main functions of rural areas, namely agriculture and the supply of rural services, such as agro-tourism and nature and landscape management.
    A Public Good Perspective on the Rural Environment: Theory and History
    Heide, Martijn van der; Heijman, Wim - \ 2019
    In: EU Bioeconomy Economics and Policies / Dries, L., Heijman, W., Jongeneel, R., Purnhagen, K., Wesseler, J., Cham : Palgrave (Palgrave Advances in Bioeconomy: Economics and Policies ) - ISBN 9783030286415 - p. 93 - 128.
    The literature on the theory of public goods is voluminous. This chapter provides an overview of public goods related to rural amenities. Many of these amenities tend to be non-exclusive and rival (e.g. forests and irrigation systems), exclusive and subject to some rivalry (e.g. nature reserves) or non-exclusive and non-rival (e.g. scenic views and clean air and water). Many beneficiaries of these amenities choose not to pay and will free ride on the efforts and activities of others (such as farmers and agro-foresters). This can present a problem for provision. Hence, rural amenities require collective action to be properly and efficiently provided since the logic of individual interests results in a socially less than optimum response.
    Doet extreme droogte stikstofbom in droge heide barsten?
    Bobbink, Roland ; Loeb, Roos ; Bijlsma, R.J. ; Delft, S.P.J. van - \ 2019
    Vakblad Natuur Bos Landschap (2019)160. - ISSN 1572-7610 - p. 3 - 6.
    In oude heide is veel koolstof en stikstof vastgelegd in de organische bodemlagen. Zelfs sterk verhoogde stikstoftoevoer doet het heidesysteem nauwelijks lekken: er spoelt ook dan vrijwel geen nitraat of ammonium uit naar dieper grondwater. Echter, ernstige verstoringen zijn een risico voor het vrijkomen van deze stikstof, zoals extreme droogte. Om dit te onderzoeken is een laboratoriumexperiment uitgevoerd, aangevuld met veldmetingen na de extreem droge zomer van 2018. Het blijkt dat de N-huishouding ernstig verstoord is door extreme droogte met zeer hoge concentraties beschikbaar ammonium en veel nitraatuitspoeling als gevolg.
    Middellange termijn effecten van chopperen en drukbegrazing als alternatieven voor plaggen op natte heide
    Wallis de Vries, M.F. ; Bobbink, Roland ; Brouwer, Emiel ; Loeb, Roos ; Vogels, J. - \ 2019
    De Levende Natuur 120 (2019)5. - ISSN 0024-1520 - p. 172 - 178.
    Herstel van de habitatkwaliteit van natte heide is zowel op nationaal als op Europees niveau een belangrijke opgave. Dit vergt behalve hydrologisch herstel ook een zorgvuldige afweging tussen verschillende maatregelen voor vegetatiebeheer en herstel van buffercapaciteit (Wallis de Vries et al., 2016). Vanwege de ingrijpende invloed van plaggen op bodem, vegetatie en fauna zijn in dit onderzoek chopperen en drukbegrazing, al of niet in combinatie met bekalking, als mogelijke alternatieven onderzocht.
    Food or furniture: Separating trophic and non-trophic effects of Spanish moss to explain its high invertebrate diversity
    Borst, Annieke C.W. ; Angelini, Christine ; Berge, Anne ten; Lamers, Leon ; Derksen-Hooijberg, Marlous ; Heide, Tjisse van der - \ 2019
    Ecosphere 10 (2019)9. - ISSN 2150-8925
    brown food web - detritus - feeding guilds - food provisioning - foundation species - habitat complexity - habitat structure - non-trophic interactions - patch size - species richness - surface area

    Foundation species are typically suggested to enhance community diversity non-trophically by increasing habitat structure and mitigating physical stress, while their trophic role is considered of minor importance. Yet, there is little experimental evidence on the relative importance of trophic and non-trophic effects and the interaction with patch size. Here, we transplanted different festoon sizes of living Tillandsia usneoides (Spanish moss) and structural mimics assessing the trophic and non-trophic roles of this habitat-forming epiphyte in mediating the invertebrate community. Compared to bare branches, mimics enhanced species and feeding guild richness and abundances, but living festoons even more so, demonstrating that trophic and non-trophic effects jointly stimulated the community. Specifically, our results show that, independent of patch size, 40% of the total species richness and 46% of total guild richness increase could be contributed to habitat structure alone, while Spanish moss trophically stimulated these metrics by another 60% and 54%. As detritivores were particularly enhanced in living festoons, our findings suggest that trophic stimulation occurred primarily through the provisioning of Spanish moss detritus. Our results highlight that foundation species can facilitate their associated communities through both trophic and non-trophic pathways, calling for studies addressing their indirect trophic role via the brown food web.

    Assessing the climate regulation potential of Agricultural soils using a decision support tool adapted to stakeholders' needs and possibilities
    Broek, Marijn Van de; Henriksen, Christian Bugge ; Ghaley, Bhim Bahadur ; Lugato, Emanuele ; Kuzmanovski, Vladimir ; Trajanov, Aneta ; Debeljak, Marko ; Sandén, Taru ; Spiegel, Heide ; Decock, Charlotte ; Creamer, Rachel ; Six, Johan - \ 2019
    Frontiers in Environmental Science 7 (2019). - ISSN 2296-665X
    Soils perform many functions that are vital to societies, among which their capability to regulate global climate has received much attention over the past decades. An assessment of the extent to which soils perform a specific function is not only important to appropriately value their current capacity, but also to make well-informed decisions about how and where to change soil management to align the delivered soil functions with societal demands. To obtain an overview of the capacity of soils to perform different functions, accurate and easy-to-use models are necessary. A problem with most currently-available models is that data requirements often exceed data availability, while generally a high level of expert knowledge is necessary to apply these models. Therefore, we developed a qualitative model to assess how agricultural soils function with respect to climate regulation. The model is driven by inputs about agricultural management practices, soil properties and environmental conditions. To reduce data requirements on stakeholders, the 17 input variables are classified into either (1) three classes: low, medium and high or (2) the presence or absence of a management practice. These inputs are combined using a decision tree with internal integration rules to obtain an estimate of the magnitude of N2O emissions and carbon sequestration. These two variables are subsequently combined into an estimate of the capacity of a soil to perform the climate regulation function. The model was tested using data from long-term field experiments across Europe. This showed that the model is generally able to adequately assess this soil function across a range of environments under different management practices. In a next step, this model will be combined with models to assess other soil functions (soil biodiversity, primary productivity, nutrient cycling and water regulation and purification). This will allow the assessment of trade-offs between these soil functions for agricultural land across Europe.
    Comparing regression, naive Bayes, and random forest methods in the prediction of individual survival to second lactation in Holstein cattle
    Heide, E.M.M. van der; Veerkamp, R.F. ; Pelt, M.L. van; Kamphuis, C. ; Athanasiadis, I. ; Ducro, B.J. - \ 2019
    Journal of Dairy Science 102 (2019)10. - ISSN 0022-0302 - p. 9409 - 9421.
    machine learning - naive Bayes - phenotypic prediction - random forest - regression

    In this study, we compared multiple logistic regression, a linear method, to naive Bayes and random forest, 2 nonlinear machine-learning methods. We used all 3 methods to predict individual survival to second lactation in dairy heifers. The data set used for prediction contained 6,847 heifers born between January 2012 and June 2013, and had known survival outcomes. Each animal had 50 genomic estimated breeding values available at birth and up to 65 phenotypic variables that accumulated over time. Survival was predicted at 5 moments in life: at birth, at 18 mo, at first calving, at 6 wk after first calving, and at 200 d after first calving. The data sets were randomly split into 70% training and 30% testing sets to evaluate model performance for 20-fold validation. The methods were compared for accuracy, sensitivity, specificity, area under the curve (AUC) value, contrasts between groups for the prediction outcomes, and increase in surviving animals in a practical scenario. At birth and 18 mo, all methods had overlapping performance; no method significantly outperformed the other. At first calving, 6 wk after first calving, and 200 d after first calving, random forest and naive Bayes had overlapping performance, and both machine-learning methods outperformed multiple logistic regression. Overall, naive Bayes has the highest average AUC at all decision points up to 200 d after first calving. Random forest had the highest AUC at 200 d after first calving. All methods obtained similar increases in survival in the practical scenario. Despite this, the methods appeared to predict the survival of individual heifers differently. All methods improved over time, but the changes in mean model outcomes for surviving and non-surviving animals differed by method. Furthermore, the correlations of individual predictions between methods ranged from r = 0.417 to r = 0.700; the lowest correlations were at first calving for all methods. In short, all 3 methods were able to predict survival at a population level, because all methods improved survival in a practical scenario. However, depending on the method used, predictions for individual animals were quite different between methods.

    A Field-Scale Decision Support System for Assessment and Management of Soil Functions
    Debeljak, Marko ; Trajanov, Aneta ; Kuzmanovski, Vladimir ; Schroder, J.J. ; Sandén, Taru ; Spiegel, Heide ; Wall, David ; Broek, Marijn van de; Rutgers, Michiel ; Bampa, Francesca ; Creamer, Rachel ; Henriksen, Christian Bugge - \ 2019
    Frontiers in Environmental Science 7 (2019). - ISSN 2296-665X
    Agricultural decision support systems (DSS) are mostly focused on increasing the supply of individual soil functions such as e.g. primary productivity or nutrient cycling, while neglecting other important soil functions, such as e.g. water purification and regulation, climate regulation and carbon sequestration, soil biodiversity and habitat provision. Making right management decisions for long-term sustainability is therefore challenging, and farmers and farm advisors would greatly benefit from an evidence-based DSS targeted for assessing and improving the supply of several soil functions simultaneously. To address this, need we designed the Soil Navigator DSS by applying a qualitative approach to multi criteria decision modelling using Decision Expert (DEX) integrative methodology. Multi-criteria decision models for the five main soil functions were developed, calibrated and validated using knowledge of involved domain experts and knowledge extracted from existing datasets by data mining. Subsequently, the five DEX models were integrated into a DSS to assess the soil functions simultaneously, and to provide management advises for improving the performance of prioritized soil functions. To enable communication between the users and the DSS, we developed a user-friendly computer-based graphical user interface, which enables users to provide the required data regarding their field to the DSS and to get textual and graphical results about the performance of each of the five soil functions in a qualitative way. The final output from the DSS is a list of soil mitigation measures that the end-users could easily apply in the field in order to achieve the desired soil function performance. The Soil Navigator DSS has a great potential to complement the Farm Sustainability Tools for Nutrients included in the Common Agricultural Policy 2021-2027 proposal adopted by the European Commission. The Soil Navigator has also a potential to be spatially upgraded to assist decisions on which soil functions to prioritize in a specific region or member state. Furthermore, the Soil Navigator DSS could be used as an educational tool for farmers, farm advisors and students, and its potential should be further exploited for the benefit of farmers and the society as a whole.
    Toward developing a yeast cell factory for the production of prenylated flavonoids
    Levisson, Mark ; Araya-Cloutier, Carla ; Bruijn, Wouter J.C. De; Heide, Menno Van Der; Salvador López, José Manuel ; Daran, Jean Marc ; Vincken, Jean Paul ; Beekwilder, Jules - \ 2019
    Journal of Agricultural and Food Chemistry 67 (2019)49. - ISSN 0021-8561 - p. 13478 - 13486.
    8-prenylnaringenin - de novo - metabolic engineering - naringenin - prenylated flavonoids - Saccharomyces cerevisiae

    Prenylated flavonoids possess a wide variety of biological activities, including estrogenic, antioxidant, antimicrobial, and anticancer activities. Hence, they have potential applications in food products, medicines, or supplements with health-promoting activities. However, the low abundance of prenylated flavonoids in nature is limiting their exploitation. Therefore, we investigated the prospect of producing prenylated flavonoids in the yeast Saccharomyces cerevisiae. As a proof of concept, we focused on the production of the potent phytoestrogen 8-prenylnaringenin. Introduction of the flavonoid prenyltransferase SfFPT from Sophora flavescens in naringenin-producing yeast strains resulted in de novo production of 8-prenylnaringenin. We generated several strains with increased production of the intermediate precursor naringenin, which finally resulted in a production of 0.12 mg L -1 (0.35 μM) 8-prenylnaringenin under shake flask conditions. A number of bottlenecks in prenylated flavonoid production were identified and are discussed.

    Harvesting European knowledge on soil functions and land management using multi-criteria decision analysis
    Bampa, Francesca ; O'Sullivan, Lilian ; Madena, Kirsten ; Sandén, Taru ; Spiegel, Heide ; Henriksen, Christian Bugge ; Ghaley, Bhim Bahadur ; Jones, Arwyn ; Staes, Jan ; Sturel, Sylvain ; Trajanov, Aneta ; Creamer, Rachel E. ; Debeljak, Marko - \ 2019
    Soil Use and Management 35 (2019)1. - ISSN 0266-0032 - p. 6 - 20.
    DEX model - farmers and multi-stakeholders - locally relevant advice - participatory research - soil quality

    Soil and its ecosystem functions play a societal role in securing sustainable food production while safeguarding natural resources. A functional land management framework has been proposed to optimize the agro-environmental outputs from the land and specifically the supply and demand of soil functions such as (a) primary productivity, (b) carbon sequestration, (c) water purification and regulation, (d) biodiversity and (e) nutrient cycling, for which soil knowledge is essential. From the outset, the LANDMARK multi-actor research project integrates harvested knowledge from local, national and European stakeholders to develop such guidelines, creating a sense of ownership, trust and reciprocity of the outcomes. About 470 stakeholders from five European countries participated in 32 structured workshops covering multiple land uses in six climatic zones. The harmonized results include stakeholders’ priorities and concerns, perceptions on soil quality and functions, implementation of tools, management techniques, indicators and monitoring, activities and policies, knowledge gaps and ideas. Multi-criteria decision analysis was used for data analysis. Two qualitative models were developed using Decision EXpert methodology to evaluate “knowledge” and “needs”. Soil quality perceptions differed across workshops, depending on the stakeholder level and regionally established terminologies. Stakeholders had good inherent knowledge about soil functioning, but several gaps were identified. In terms of critical requirements, stakeholders defined high technical, activity and policy needs in (a) financial incentives, (b) credible information on improving more sustainable management practices, (c) locally relevant advice, (d) farmers’ discussion groups, (e) training programmes, (f) funding for applied research and monitoring, and (g) strengthening soil science in education.

    Assessing social innovation across offshore sectors in the Dutch North Sea
    Soma, K. ; Burg, S.W.K. van den; Selnes, T. ; Heide, C.M. van der - \ 2019
    Ocean & Coastal Management 167 (2019). - ISSN 0964-5691 - p. 42 - 51.
    Maritime spatial planning - Social innovation - Dutch North Sea - Offshore mussel producton - Offshore seaweed production - Offshore wind production
    Activities in the North Sea are intensifying. The European Union instructs maritime spatial planning across member states that motivates coordination of activities, stakeholders, policies, governance levels and nations. Social innovation is a concept addressing ways in which changing attitudes, behaviour or perceptions are leading to new and improved ways of acting jointly within a group and beyond. The main aim of this article is to explore social innovation in maritime spatial planning. Instances of social innovation are assessed across three sectors in the Dutch North Sea: the offshore wind energy, the offshore mussel cultivation and the offshore seaweed farming. The assessment shows that, while existing systems of social innovation are favourable to the offshore wind expansions, the barriers to grow for the offshore mussel sector include low willingness to change within the sector, and disadvantageous governmental support to change. The offshore seaweed farming is in a stage of re-organisation of not yet developed regulations, rules and norms for production offshore and enhanced cooperation, with unsure outcomes. Maritime spatial planning can play a more influential role for change if tackling main challenges, including inclusiveness, accountability, private user rights and realisation of organisation or reorganisation, and if making use of the potentials of knowledge brokers when sectors are advancing with new technologies.
    De waarde van natuurlijk kapitaal
    Heide, C.M. van der - \ 2018
    Landschap : tijdschrift voor landschapsecologie en milieukunde 35 (2018)3. - ISSN 0169-6300 - p. 160 - 165.
    ‘Natuurlijk kapitaal’, als metafoor voor de waarde van natuur, is niet meer weg te denken uit het groene jargon. Het is een term die sterk tot de verbeelding spreekt en veel ingang vindt, maar ook op kritiek kan rekenen. Is ‘natuurlijk kapitaal’ een waas vermomd als inzicht? Of biedt het weldegelijk aanknopingspunten voor een nieuw leidend natuurverhaal, een gedeelde overtuiging?
    Early prediction of phenotypic survival to the second lactation in Dutch and Flemish Holstein heifers using genomic and phenotypic data
    Heide, E.E.M. van der; Veerkamp, R.F. ; Kamphuis, Claudia ; Ducro, B.J. - \ 2018
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