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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Red LED streetlights make UK road bat-friendly
Ramakers, J.J.C. ; Ferguson, K.B. ; Veenendaal, E.M. ; Visser, M.E. - \ 2019
Effect of mass rearing on the genetic diversity of the predatory mite Amblyseius swirskii
Paspati, Angeliki ; Ferguson, Kim B. ; Verhulst, Eveline C. ; Urbaneja, Alberto ; González‐Cabrera, Joel ; Pannebakker, Bart A. - \ 2019
Entomologia Experimentalis et Applicata 167 (2019)7. - ISSN 0013-8703 - p. 670 - 681.
Amblyseius swirskii Athias‐Henriot (Acari: Phytoseiidae) is a predatory mite used to control whiteflies and thrips in protected crops. This biocontrol agent, originating from the Eastern Mediterranean region, has been mass‐reared for commercial use since 2005 and is widely used in augmentative biocontrol programs. As a polyphagous predator, it has to cope with different biotic and abiotic factors. However, possible adaptation to mass rearing for production might be hindering its resilience and capacity for optimum performance in the field. In this study, we investigated the effect of long‐term mass rearing on the genetic diversity of A. swirskii. We identified six microsatellite loci from whole‐genome nanopore sequencing of A. swirskii and used these in a comparative analysis of the genetic diversity and differentiation in eight wild populations collected from Israel in 2017 and a commercially available population. Our results indicate that the commercial population is 2.5× less heterozygous than the wild A. swirskii. Furthermore, the commercial population has the highest genetic differentiation from all the natural populations, as indicated by higher pairwise Fst values. Overall, we show that commercially reared A. swirskii have reduced genetic variation compared to their wild counterparts, which may reduce their performance when released to control pests in an integrated pest management (IPM) context.
Twenty-three unsolved problems in hydrology (UPH)–a community perspective
Blöschl, Günter ; Bierkens, Marc F.P. ; Chambel, Antonio ; Cudennec, Christophe ; Destouni, Georgia ; Fiori, Aldo ; Kirchner, James W. ; McDonnell, Jeffrey J. ; Savenije, Hubert H.G. ; Sivapalan, Murugesu ; Stumpp, Christine ; Toth, Elena ; Volpi, Elena ; Carr, Gemma ; Lupton, Claire ; Salinas, Josè ; Széles, Borbála ; Viglione, Alberto ; Aksoy, Hafzullah ; Allen, Scott T. ; Amin, Anam ; Andréassian, Vazken ; Arheimer, Berit ; Aryal, Santosh K. ; Baker, Victor ; Bardsley, Earl ; Barendrecht, Marlies H. ; Bartosova, Alena ; Batelaan, Okke ; Berghuijs, Wouter R. ; Beven, Keith ; Blume, Theresa ; Bogaard, Thom ; Borges de Amorim, Pablo ; Böttcher, Michael E. ; Boulet, Gilles ; Breinl, Korbinian ; Brilly, Mitja ; Brocca, Luca ; Buytaert, Wouter ; Castellarin, Attilio ; Castelletti, Andrea ; Chen, Xiaohong ; Chen, Yangbo ; Chen, Yuanfang ; Chifflard, Peter ; Claps, Pierluigi ; Clark, Martyn P. ; Collins, Adrian L. ; Croke, Barry ; Dathe, Annette ; David, Paula C. ; Barros, Felipe P.J. de; Rooij, Gerrit de; Baldassarre, Giuliano Di; Driscoll, Jessica M. ; Duethmann, Doris ; Dwivedi, Ravindra ; Eris, Ebru ; Farmer, William H. ; Feiccabrino, James ; Ferguson, Grant ; Ferrari, Ennio ; Ferraris, Stefano ; Fersch, Benjamin ; Finger, David ; Foglia, Laura ; Fowler, Keirnan ; Gartsman, Boris ; Gascoin, Simon ; Gaume, Eric ; Gelfan, Alexander ; Geris, Josie ; Gharari, Shervan ; Gleeson, Tom ; Glendell, Miriam ; Gonzalez Bevacqua, Alena ; González-Dugo, María P. ; Grimaldi, Salvatore ; Gupta, A.B. ; Guse, Björn ; Han, Dawei ; Hannah, David ; Harpold, Adrian ; Haun, Stefan ; Heal, Kate ; Helfricht, Kay ; Herrnegger, Mathew ; Hipsey, Matthew ; Hlaváčiková, Hana ; Hohmann, Clara ; Holko, Ladislav ; Hopkinson, Christopher ; Hrachowitz, Markus ; Illangasekare, Tissa H. ; Inam, Azhar ; Innocente, Camyla ; Istanbulluoglu, Erkan ; Jarihani, Ben ; Kalantari, Zahra ; Kalvans, Andis ; Khanal, Sonu ; Khatami, Sina ; Kiesel, Jens ; Kirkby, Mike ; Knoben, Wouter ; Kochanek, Krzysztof ; Kohnová, Silvia ; Kolechkina, Alla ; Krause, Stefan ; Kreamer, David ; Kreibich, Heidi ; Kunstmann, Harald ; Lange, Holger ; Liberato, Margarida L.R. ; Lindquist, Eric ; Link, Timothy ; Liu, Junguo ; Loucks, Daniel Peter ; Luce, Charles ; Mahé, Gil ; Makarieva, Olga ; Malard, Julien ; Mashtayeva, Shamshagul ; Maskey, Shreedhar ; Mas-Pla, Josep ; Mavrova-Guirguinova, Maria ; Mazzoleni, Maurizio ; Mernild, Sebastian ; Misstear, Bruce Dudley ; Montanari, Alberto ; Müller-Thomy, Hannes ; Nabizadeh, Alireza ; Nardi, Fernando ; Neale, Christopher ; Nesterova, Nataliia ; Nurtaev, Bakhram ; Odongo, Vincent O. ; Panda, Subhabrata ; Pande, Saket ; Pang, Zhonghe ; Papacharalampous, Georgia ; Perrin, Charles ; Pfister, Laurent ; Pimentel, Rafael ; Polo, María J. ; Post, David ; Prieto Sierra, Cristina ; Ramos, Maria Helena ; Renner, Maik ; Reynolds, José Eduardo ; Ridolfi, Elena ; Rigon, Riccardo ; Riva, Monica ; Robertson, David E. ; Rosso, Renzo ; Roy, Tirthankar ; Sá, João H.M. ; Salvadori, Gianfausto ; Sandells, Mel ; Schaefli, Bettina ; Schumann, Andreas ; Scolobig, Anna ; Seibert, Jan ; Servat, Eric ; Shafiei, Mojtaba ; Sharma, Ashish ; Sidibe, Moussa ; Sidle, Roy C. ; Skaugen, Thomas ; Smith, Hugh ; Spiessl, Sabine M. ; Stein, Lina ; Steinsland, Ingelin ; Strasser, Ulrich ; Su, Bob ; Szolgay, Jan ; Tarboton, David ; Tauro, Flavia ; Thirel, Guillaume ; Tian, Fuqiang ; Tong, Rui ; Tussupova, Kamshat ; Tyralis, Hristos ; Uijlenhoet, Remko ; Beek, Rens van; Ent, Ruud J. van der; Ploeg, Martine van der; Loon, Anne F. Van; Meerveld, Ilja van; Nooijen, Ronald van; Oel, Pieter R. van; Vidal, Jean Philippe ; Freyberg, Jana von; Vorogushyn, Sergiy ; Wachniew, Przemyslaw ; Wade, Andrew J. ; Ward, Philip ; Westerberg, Ida K. ; White, Christopher ; Wood, Eric F. ; Woods, Ross ; Xu, Zongxue ; Yilmaz, Koray K. ; Zhang, Yongqiang - \ 2019
Hydrological Sciences Journal 64 (2019)10. - ISSN 0262-6667 - p. 1141 - 1158.
hydrology - interdisciplinary - knowledge gaps - research agenda - science questions

This paper is the outcome of a community initiative to identify major unsolved scientific problems in hydrology motivated by a need for stronger harmonisation of research efforts. The procedure involved a public consultation through online media, followed by two workshops through which a large number of potential science questions were collated, prioritised, and synthesised. In spite of the diversity of the participants (230 scientists in total), the process revealed much about community priorities and the state of our science: a preference for continuity in research questions rather than radical departures or redirections from past and current work. Questions remain focused on the process-based understanding of hydrological variability and causality at all space and time scales. Increased attention to environmental change drives a new emphasis on understanding how change propagates across interfaces within the hydrological system and across disciplinary boundaries. In particular, the expansion of the human footprint raises a new set of questions related to human interactions with nature and water cycle feedbacks in the context of complex water management problems. We hope that this reflection and synthesis of the 23 unsolved problems in hydrology will help guide research efforts for some years to come.

Identifying Dietary Strategies to Improve Nutrient Adequacy among Ethiopian Infants and Young Children Using Linear Modelling
Samuel, Aregash ; Osendarp, Saskia J.M. ; Ferguson, Elaine ; Borgonjen, Karin ; Alvarado, Brenda M. ; Neufeld, Lynnette M. ; Adish, Abdulaziz ; Kebede, Amha ; Brouwer, Inge D. - \ 2019
Nutrients 11 (2019)6. - ISSN 2072-6643
complementary food - Ethiopia - food-based dietary recommendations - nutrient adequacy - Optifood analysis

Nutrient adequacy of young children's diet and best possible strategies to improve nutrient adequacy were assessed. Data from the Ethiopian National Food Consumption Survey were analysed using Optifood (software for linear programming) to identify nutrient gaps in diets for children (6-8, 9-11 and 12-23 months), and to formulate feasible Food-Based Dietary Recommendations (FBDRs) in four regions which differ in culture and food practices. Alternative interventions including a local complementary food, micronutrient powders (MNPs), Small quantity Lipid-based Nutrient Supplement (Sq-LNS) and combinations of these were modelled in combination with the formulated FBDRs to compare their relative contributions. Risk of inadequate and excess nutrient intakes was simulated using the Estimated Average Requirement cut-point method and the full probability approach. Optimized local diets did not provide adequate zinc in all regions and age groups, iron for infants <12 months of age in all regions, and calcium, niacin, thiamine, folate, vitamin B12 and B6 in some regions and age-groups. The set of regional FBDRs, considerably different for four regions, increased nutrient adequacy but some nutrients remained sub-optimal. Combination of regional FBDRs with daily MNP supplementation for 6-12 months of age and every other day for 12-23 months of age, closed the identified nutrient gaps without leading to a substantial increase in the risk of excess intakes.

Repurposing isoxazoline veterinary drugs for control of vector-borne human diseases
Miglianico, Marie ; Eldering, Maarten ; Slater, Hannah ; Ferguson, Neil ; Ambrose, Pauline ; Lees, Rosemary S. ; Koolen, Karin M.J. ; Pruzinova, Katerina ; Jancarova, Magdalena ; Volf, Petr ; Koenraadt, Constantianus J.M. ; Duerr, Hans Peter ; Trevitt, Graham ; Yang, Baiyuan ; Chatterjee, Arnab K. ; Wisler, John ; Sturm, Angelika ; Bousema, Teun ; Sauerwein, Robert W. ; Schultz, Peter G. ; Tremblay, Matthew S. ; Dechering, Koen J. - \ 2018
Proceedings of the National Academy of Sciences of the United States of America 115 (2018)29. - ISSN 0027-8424 - p. E6920 - E6926.
Insecticide - Isoxazoline - Malaria - Vector control - Zika fever

Isoxazolines are oral insecticidal drugs currently licensed fo ectoparasite control in companion animals. Here we propose thei use in humans for the reduction of vector-borne disease incidence Fluralaner and afoxolaner rapidly killed Anopheles, Aedes, an Culex mosquitoes and Phlebotomus sand flies after feeding on drug-supplemented blood meal, with IC50 values ranging from 33 to 575 nM, and were fully active against strains with preexist ing resistance to common insecticides. Based on allometric scalin of preclinical pharmacokinetics data, we predict that a single hu man median dose of 260 mg (IQR, 177–407 mg) for afoxolaner, o 410 mg (IQR, 278–648 mg) for fluralaner, could provide an insecti cidal effect lasting 50–90 days against mosquitoes and Phleboto mus sand flies. Computational modeling showed that seasona mass drug administration of such a single dose to a fraction of regional population would dramatically reduce clinical cases o Zika and malaria in endemic settings. Isoxazolines therefore rep resent a promising new component of drug-based vector control.

Land-atmosphere interactions the LoCo perspective
Santanello, Joseph A. ; Dirmeyer, Paul A. ; Ferguson, Craig R. ; Findell, Kirsten L. ; Tawfik, Ahmed B. ; Berg, Alexis ; Ek, Michael ; Gentine, Pierre ; Guillod, Benoit P. ; Heerwaarden, Chiel van; Roundy, Joshua ; Wulfmeyer, Volker - \ 2018
Bulletin of the American Meteorological Society 99 (2018)6. - ISSN 0003-0007 - p. 1253 - 1272.

Metrics derived by the LoCo working group have matured and begun to enter the mainstream, signaling the success of the GEWEX approach to foster grassroots participation.

BIOFOS: A micro-ring resonator-based biophotonic system for food analysis - Application to olive oil contaminants
Romero, A. ; Ninot, A. ; Hermoso, J.F. ; Zergioti, I. ; Kouloumentas, C. ; Avramopoulos, H. ; Leeuwis, H. ; Schreuder, E. ; Graf, S. ; Knapp, H. ; Barthelmebs, L. ; Noguer, T. ; Tsekenis, G. ; Scheres, L. ; Smulders, M. ; Zuilhof, H. ; Heesink, G. ; Reguillo, L. - \ 2018
In: Proceedings of the 8th International Olive Symposium. - International Society for Horticultural Science (Acta Horticulturae ) - ISBN 9789462611955 - p. 505 - 509.
Analysis of pesticides and heavy metals - Copper - Oil quality - Organophosphates

Current detection methods for contaminants in food use high-tech equipment sited in specialized laboratories. This makes online quality control along the food chain difficult. Official regulations limit pesticide and heavy-metal contamination, mainly for organic production, although their analysis is quite expensive, requires skilled personnel and is very difficult to apply to a large number of oil batches. The BIOFOS Project (ICT-FP7-GA.N.611528) aims to develop and validate a Lab-on-a-Chip (LoC) multianalyser, based on micro-biophotonic sensors, for in-situ food contaminant analysis. This device includes biosensors for milk analysis (aflatoxin M1, antibiotic and lactose), nuts (aflatoxin B1), dried fruits (ochratoxin A) and olive oil (organophosphates and metals). BIOFOS combines four high-tech platforms: (1) a photonic platform based on micro-ring resonators (MRR) for signal quantification, (2) a biological platform based on aptamers for analyte detection, (3) a nanochemical platform to immobilize aptamers onto the chip surface and (4) a microfluidic platform for sample pre-treatment and its loading into the biosensor. The project is organized in work packages in order to develop the technological platforms. End-user requirements are also considered, as well as existing fast analysis kits that will be compared against the device. Validation protocols and exploitation plans are also included. BIOFOS applications for olive oil analysis are discussed, in terms of accuracy, sensitivity, time-to-result and cost per sample.

Reconfiguration of Hydrosocial Territories and Struggles for Water Justice : from Part II - Hydrosocial De-Patterning and Re-Composition
Hommes, L.M. ; Boelens, R.A. ; Duarte Abadia, Bibiana ; Hidalgo, Jean Pablo ; Hoogesteger van Dijk, J.D. - \ 2018
In: Water Justice / Boelens, R., Perreault, T., Vos, J., Cambridge : Cambridge University Press - ISBN 9781107179080 - p. 151 - 168.
Introduction A vast and growing body of scholarly studies has shown how large-scale hydraulic and hydro-managerial projects, such as large dam and irrigation developments or market-environmentalist ecosystem payment schemes, have diverse socio-cultural and political-economic implications beyond merely altering water flows and raising socio-economic productivity. Concepts such as the hydrosocial cycle (Boelens, 2014; Linton and Budds, 2014), waterscapes (Baviskar, 2007; Budds and Hinojosa-Valencia, 2012; Swyngedouw, 1999) and water as socio-nature (Barnes and Alatout, 2012; Perreault, 2014) express connected insights about water being coproduced by social relations and in turn shaping these relations. The hydrosocial cycle, for instance, is described as a socio-natural process in which “water and society make and remake each other over space and time” cyclically (Linton and Budds, 2014: 170). Such coproduction of water and society is also reflected in the notion of waterscapes, conceptualized as socio-spatial configurations of water flows, artifacts, institutions and imaginaries embodying a particular world view (Budds and Hinojosa-Valencia, 2012; Zwarteveen 2015). However, these notions have so far largely focused on established hegemonic structures and discourses that drive and succeed from waterscape configurations. Less attention has been given to the multiplicity of diverging and overlapping hydrosocial territories that exist within one and the same space. To address this, we employ the hydrosocial territories approach, analyzing water territories not merely as materializations of dominant discourses and interests, but as multi-scalar networks in which water flows, hydraulic infrastructure, legal-administrative and financial systems, and socio-cultural institutions and practices are interactively produced, aligned, negotiated and contested (Boelens et al., 2016). Furthermore, combining the hydrosocial territories notion with Foucault’s governmentality approach highlights different forms of “government rationalities” and how they are entwined with hydraulic and hydro-managerial projects. We focus specifically on analyzing how ruling groups’ efforts to “conduct the conduct” of the governed (Foucault, 2008: 313) penetrate, operate through, and assimilate the rationality of the governed to advance neoliberal projects (Fletcher, 2010; Hommes et al., 2016; Zwarteveen and Boelens, 2014). Building on the work of Agnew (1994), Gupta and Ferguson (1992) and Elden (2010), we understand territories not as fixed spaces, but as spatially entrenched multi-scalar networks evolving from social interactions and practices, and materializations of these practices (see also Baletti, 2012; Brighenti, 2010). Social encounters and acts, including legal-administrative arrangements, technical reconfigurations and symbolic, cultural and political mechanisms of boundary-and place-making, actively produce territories.
Going for the dough : Engaging governmental funds in the Ciénega de Zacapu, Mexico
Servin Juárez, Fidencio - \ 2018
Wageningen University. Promotor(en): L.E. Visser, co-promotor(en): G.M. Verschoor. - Wageningen : Wageningen University - ISBN 9789463438292 - 167

This study follows a planned development intervention involving greenhouse production systems for tomatoes. The intervention played out in Mexico, where the Planning Sub- Committee for Regional Development (SUPLADER) promoted a strategy for the "development" of the Zacapu region in Michoacán, from 2002 to 2005. The intervention is illustrated through a detailed, in-depth ethnographic case study of the way in which the Unión de Invernaderos Ruta de la Libertad (a USPR or Union of Rural Producers Association) sought to materialize a greenhouse project.

Using an actor-oriented perspective (Long, 2001; Nuijten, 2001; Diego, 1997) and the concepts of actor’s agency, networks, associations, collectives and organizing processes, the study aims to understand the character of intervention, and shows how programs and development projects serve different purposes – purposes which symbiotically relate to the prevailing social conditions. As a general conclusion, I argue that what is called “the dough” (la lana) is what drives the dynamics of development intervention. While important, it is central to understand the different roles “the dough” plays in these intervention settings: for planners, it is the means to accomplish development, whereas for project beneficiaries it is a goal in itself.

Chapter 1 elaborates on the general context of planned intervention in Michoacán’s Zacapu region, delineates the theoretical framework, presents the main research question (How do stakeholders organize themselves around the greenhouse project, and how do they redefine the view of planned development by the local government?) and elaborates on the methodology employed.

Chapter 2 describes the organizing processes underlying implementation of the greenhouse project in the Zacapu - Ciénega region. It explains how, in order to acquire resources for the project, stakeholders organized into groups, forming Rural Production Associations (SPRs) and Unions of Rural Producers’ Associations (USPRs). As a result, a total of 28 SPRs were formed. For the most part, members of these SPRs had extensive, prior experience in organizing and participating in programs similar to those promoted by SUPLADER.

Chapter 3 describes the practices of the eight groups (SPR) who got no resources from SUPLADER and seek to compensate for an initial investment from the Alliance for the Countryside (Alianza). To complete the project file, the groups were linked to government agencies, municipalities and communities as well as with external agents (firms) to use the register as a professional services provider (PSP) and enter the file to the Alianza program. In addition, power differences and conflict relationships were evident (Lukes, 1974); conditions that led to negotiation (Diego, 1997).

Advisor firms were considered necessary for the negotiations since their capabilities were required and considered essential for the expected benefit of the Asociación, although they appeared to be a very powerful party. Despite the regulations established by the State to exercise governmental programs, the parties responsible for exercising them applied ambiguous criteria.

Chapter 4 describes the development of an ideal configuration of greenhouses that included technological, social and cultural elements associated with safety practices, automation and demanding consumers located in an international market. This perception was far from the project conditions of greenhouses in La Ciénega; however, it did not prevent generating expectations among the SPRs. For these actors, the greenhouse became an alternative livelihood, income, and development opportunity.

To interpret the processes described I used Latour’s (2008) notion of a sociology of associations; this allowed me to interpret how actor-networks were incorporated in the greenhouse project.

Chapter 5 describes a breakaway attempt from the Asociación spearheaded by 17 SPRs that chose to build their greenhouses with an alternative hardware supplier (ACEA). To obtain the necessary funds new negotiations were started with a range of agencies. The move eventually strengthened the Asociación and its institutional embeddedness.

In Chapter 6, the Asociación is shown to be a heterogeneous collective with different agendas. This resulted in several conflicts, some of them, involving the advisory offices that intended to take the resources (“the dough”) from the project. Nonetheless, a regional bank authorized a cash disbursement for the initial stage of the greenhouse project.

Chapter 7 presents the final stage of SUPLADER Zacapu’s greenhouse project. After complex negotiations and conflicts within the Asociación, complementary credit was obtained for the construction of the greenhouse. However, during a municipal election campaign key figures in charge of implementation changed position; this led to a change in project conditions, and the Asociación had to face interventions from external actors. The negotiation game restarted and triggered a new set of strategies (amongst others to obtain money directly through the new SEPLADE delegate). Eventually, some of the Asociación’s funds were reappropriated and assigned to USPR Agrícola Tsakapu and different factions (vying for of resources) resulted fom this.

Chapter 8 provides the discussion and conclusion to this thesis, with insights that build on Mosse’s (2005) argument that policies to promote development are associated to organizational demands and needs to maintain existing relationships (rather than promoting a previously defined policy). However, in the case of La Ciénega, the agents of change (including the Michoacán Congress) supported and pushed through planners’ development initiatives. In line with Ferguson (1994), I conclude that development must be understood in relation to the political-economic-cultural interests of those behind its design and implementation. Rather than linear, hegemonic and rigid, however, actors’ practices and strategies mould and twist planned development intervention to suit their needs and desires.

Seagrass ecosystem trajectory depends on the relative timescales of resistance, recovery and disturbance
O'Brien, Katherine R. ; Waycott, Michelle ; Maxwell, Paul ; Kendrick, Gary A. ; Udy, James W. ; Ferguson, Angus J.P. ; Kilminster, Kieryn ; Scanes, Peter ; McKenzie, Len J. ; McMahon, Kathryn ; Adams, Matthew P. ; Samper-Villarreal, Jimena ; Collier, Catherine ; Lyons, Mitchell ; Mumby, Peter J. ; Radke, Lynda ; Christianen, Marjolijn J.A. ; Dennison, William C. - \ 2018
Marine Pollution Bulletin 134 (2018). - ISSN 0025-326X - p. 166 - 176.
Colonizing - Opportunistic - Persistent - Recovery - Resilience - Resistance - Seagrass - Trajectory
Seagrass ecosystems are inherently dynamic, responding to environmental change across a range of scales. Habitat requirements of seagrass are well defined, but less is known about their ability to resist disturbance. Specific means of recovery after loss are particularly difficult to quantify. Here we assess the resistance and recovery capacity of 12 seagrass genera. We document four classic trajectories of degradation and recovery for seagrass ecosystems, illustrated with examples from around the world. Recovery can be rapid once conditions improve, but seagrass absence at landscape scales may persist for many decades, perpetuated by feedbacks and/or lack of seed or plant propagules to initiate recovery. It can be difficult to distinguish between slow recovery, recalcitrant degradation, and the need for a window of opportunity to trigger recovery. We propose a framework synthesizing how the spatial and temporal scales of both disturbance and seagrass response affect ecosystem trajectory and hence resilience.
The potential contribution of yellow cassava to dietary nutrient adequacy of primary-school children in Eastern Kenya; the use of linear programming
Talsma, Elise F. ; Borgonjen-van den Berg, Karin J. ; Melse-Boonstra, Alida ; Mayer, Eva V. ; Verhoef, Hans ; Demir, Ayşe Y. ; Ferguson, Elaine L. ; Kok, Frans J. ; Brouwer, Inge D. - \ 2018
Public Health Nutrition 21 (2018)2. - ISSN 1368-9800 - p. 365 - 376.
Biofortification - Linear programming - Optifood - Vitamin A deficiency - Yellow cassava

Objective: Introduction of biofortified cassava as school lunch can increase vitamin A intake, but may increase risk of other deficiencies due to poor nutrient profile of cassava. We assessed the potential effect of introducing a yellow cassava-based school lunch combined with additional food-based recommendations (FBR) on vitamin A and overall nutrient adequacy using Optifood (linear programming tool). Design: Cross-sectional study to assess dietary intakes (24 h recall) and derive model parameters (list of foods consumed, median serving sizes, food and food (sub)group frequency distributions, food cost). Three scenarios were modelled, namely daily diet including: (i) no school lunch; (ii) standard 5d school lunch with maize/beans; and (iii) 5d school lunch with yellow cassava. Each scenario and scenario 3 with additional FBR were assessed on overall nutrient adequacy using recommended nutrient intakes (RNI). Setting: Eastern Kenya. Subjects: Primary-school children (n 150) aged 7–9 years. Results: Best food pattern of yellow cassava-based lunch scenario achieved 100 % RNI for six nutrients compared with no lunch (three nutrients) or standard lunch (five nutrients) scenario. FBR with yellow cassava and including small dried fish improved nutrient adequacy, but could not ensure adequate intake of fat (52 % of average requirement), riboflavin (50 % RNI), folate (59 % RNI) and vitamin A (49 % RNI). Conclusions: Introduction of yellow cassava-based school lunch complemented with FBR potentially improved vitamin A adequacy, but alternative interventions are needed to ensure dietary adequacy. Optifood is useful to assess potential contribution of a biofortified crop to nutrient adequacy and to develop additional FBR to address remaining nutrient gaps.

Development of a dichotomous indicator for population-level assessment of dietary diversity in women of reproductive age
Martin-Prevel, Yves ; Arimond, Mary ; Allemand, Pauline ; Wiesmann, Doris ; Ballard, Terri J. ; Deitchler, Megan ; Dop, Marie Claude ; Kennedy, Gina ; Lartey, Anna ; Lee, Warren T.K. ; Moursi, Mourad ; Becquey, Elodie ; Brouwer, Inge D. ; Carriquiry, Alicia ; Daniels, Melissa C. ; Fanou-Fogny, Nadia ; Ferguson, Elaine ; Joseph, Maria L. ; Ruel, Marie T. ; Torheim, Liv Elin - \ 2017
Current Developments in Nutrition 1 (2017)12. - ISSN 2475-2991
Developing countries - Diet quality - Dietary diversity - Food groups - Indicator - Nutrition-sensitive interventions - Resource-poor settings - Women of reproductive age

Background: Dietary diversity is a key element of diet quality, but diets of women of reproductive age (WRA; aged 15-49 y) in resource-poor settings are often deficient in a range of micronutrients. Previous work showed associations between simple food-group diversity indicators (FGIs) and micronutrient adequacy among WRA. For operational and advocacy purposes, however, there is strong demand for a dichotomous indicator reflecting an acceptable level of dietary diversity. Objective: The aim of the study was to develop a dichotomous indicator of dietary diversity inWRA. Methods: We performed a secondary analysis of 9 data sets containing quantitative dietary data from WRA in resource-poor settings (total n = 4166). From the raw dietary data, we calculated an individual "mean probability of adequacy" (MPA) across 11 micronutrients. Several candidate FGIs were constructed. Indicator performance in predicting an MPA > 0.60 was assessed within each data set by using receiver-operating characteristic analysis and sensitivity and specificity analysis at various FGI cutoffs. The analysis was performed separately for nonpregnant and nonlactating (NPNL) women and for lactating women. Results: We identified 2 "best candidate" dichotomous indicators on the basis of 9- or 10-point food-group scores (FGI-9 and FGI-10) with a cutoff of ≥ 5 food groups. Both were significantly correlated to MPA in each site (P < 0.001). Areas under the curve were moderate, ranging from 0.62 to 0.82 among NPNL women and from 0.56 to 0.90 among lactating women. Comparisons of results slightly favored FGI-10 for all women. Conclusions: When resource-intensive dietary methods are not feasible, a simple dichotomous indicator based on a cutoff of ≥ 5 of 10 defined food groups reflects "minimum dietary diversity for women of reproductive age." According to the conclusions of a consensus meeting of experts, this indicator is well suited for population-level assessment, advocacy, and possibly also for tracking of change in dietary diversity across time.

Data from: Response of bats to light with different spectra: light-shy and agile bat presence is affected by white and green, but not red light
Spoelstra, K. ; Grunsven, R.H.A. van; Ramakers, Jip J.C. ; Ferguson, Kim B. ; Raap, Thomas ; Donners, Maurice ; Veenendaal, E.M. ; Visser, Marcel E. - \ 2017
light pollution - experimental light at night - bats - light colour
Artificial light at night has shown a remarkable increase over the past decades. Effects are reported for many species groups, and include changes in presence, behaviour, physiology and life-history traits. Among these, bats are strongly affected, and how bat species react to light is likely to vary with light colour. Different spectra may therefore be applied to reduce negative impacts. We used a unique set-up of eight field sites to study the response of bats to three different experimental light spectra in an otherwise dark and undisturbed natural habitat. We measured activity of three bat species groups around transects with light posts emitting white, green and red light with an intensity commonly used to illuminate countryside roads. The results reveal a strong and spectrum-dependent response for the slow-flying Myotis and Plecotus and more agile Pipistrellus species, but not for Nyctalus and Eptesicus species. Plecotus and Myotis species avoided white and green light, but were equally abundant in red light and darkness. The agile, opportunistically feeding Pipistrellus species were significantly more abundant around white and green light, most likely because of accumulation of insects, but equally abundant in red illuminated transects compared to dark control. Forest-dwelling Myotis and Plecotus species and more synanthropic Pipistrellus species are thus least disturbed by red light. Hence, in order to limit the negative impact of light at night on bats, white and green light should be avoided in or close to natural habitat, but red lights may be used if illumination is needed.
Nutritional strategies to establish a responsible use of antibiotics in swine
Hartog, L.A. den; Hees, H. van; Ferguson, N. ; Smits, C. - \ 2017
In: Proceedings Banff Pork Seminar. - University of Alberta (Advances in Pork Production ) - p. 177 - 188.
Response of bats to light with different spectra : Light-shy and agile bat presence is affected by white and green, but not red light
Spoelstra, Kamiel ; Grunsven, Roy H.A. van; Ramakers, Jip J.C. ; Ferguson, Kim B. ; Raap, Thomas ; Donners, Maurice ; Veenendaal, Elmar M. ; Visser, Marcel E. - \ 2017
Proceedings of the Royal Society. B: Biological Sciences 284 (2017)1855. - ISSN 0962-8452
Bats - Experimental light at night - Light colour - Light pollution

Artificial light at night has shown a remarkable increase over the past decades. Effects are reported for many species groups, and include changes in presence, behaviour, physiology and life-history traits. Among these, bats are strongly affected, and how bat species react to light is likely to vary with light colour. Different spectra may therefore be applied to reduce negative impacts. We used a unique set-up of eight field sites to study the response of bats to three different experimental light spectra in an otherwise dark and undisturbed natural habitat. We measured activity of three bat species groups around transects with light posts emitting white, green and red light with an intensity commonly used to illuminate countryside roads. The results reveal a strong and spectrum-dependent response for the slowflying Myotis and Plecotus and more agile Pipistrellus species, but not for Nyctalus and Eptesicus species. Plecotus and Myotis species avoided white and green light, but were equally abundant in red light and darkness. The agile, opportunistically feeding Pipistrellus species were significantly more abundant around white and green light, most likely because of accumulation of insects, but equally abundant in red illuminated transects compared to dark control. Forest-dwelling Myotis and Plecotus species and more synanthropic Pipistrellus species are thus least disturbed by red light. Hence, in order to limit the negative impact of light at night on bats, white and green light should be avoided in or close to natural habitat, but red lights may be used if illumination is needed.

Integere relaties: wetenschappelijke integriteit en de verhouding tussen wetenschap en samenleving
Turnhout, E. - \ 2017
Beleid en maatschappij 44 (2017)1. - ISSN 0165-1625
Wetenschap staat onder druk. Dat lijken althans wetenschappers zelf in groten getale te vinden. Wetenschap moet haar autoriteit en geloofwaardigheid terugkrijgen, zichzelf opnieuw uitvinden en ze moet haar publieke functie in de democratie weer gaan vervullen. Hoewel de verschillende bijdragen aan het debat hierover allemaal het huidige wetenschapssysteem bekritiseren, is het belangrijk om te beseffen dat ze niet allemaal hetzelfde zeggen of dezelfde doelen voor ogen hebben. Sommigen lijken vooral uit te zijn op het (her)winnen van respect en autoriteit voor de wetenschap (Nurse, 2012; Van Dijck & Saarloos, 2017). Anderen uiten kritiek op de over-gemanagede universiteit en de nadruk op kwantitatieve prestatie-indicatoren (Benedictus, Miedema & Ferguson, 2016; Halffman &Radder, 2013). Weer anderen leggen de nadruk op de relatie tussen wetenschap en samenleving en suggereren dat het tijd is voor een nieuw contract tussen wetenschap en samenleving (Gibbons, 1999; Sarewitz, 2016). In dit essay richt ik me op dit laatste onderwerp: de relatie tussen wetenschap en maatschappij. Ik geef eerst een overzicht van dominante idealen over hoe deze relatie het beste kan worden georganiseerd en van de kritiek die is geuit tegen deze idealen. Vervolgens illustreer ik, aan de hand van een voorbeeld over statiegeldonderzoek, de risico’s en knelpunten die kunnen optreden als niet zorgvuldig wordt nagedacht over welke rol wetenschap in verschillende vraagstukken kan spelen. Op basis daarvan pleit ik voor een verbreding van het begrip ‘wetenschappelijke integriteit’, zodat die niet alleen betrekking heeft op het gedrag van individuele wetenschappers, maar ook op de institutionele relaties en maatschappelijke context waarin wetenschappers handelen.
Loss of animal seed dispersal increases extinction risk in a tropical tree species due to pervasive negative density dependence across life stages
Caughlin, T.T. ; Ferguson, J.M. ; Lichstein, J.W. ; Zuidema, P.A. ; Bunyavejchewin, S. ; Levey, D.J. - \ 2015
Proceedings of the Royal Society. B: Biological Sciences 282 (2015)1798. - ISSN 0962-8452 - 9 p.
spatial-patterns - rain-forest - recruitment - consequences - neighborhood - defaunation - habitat - uncertainty - diversity - abundance
Overhunting in tropical forests reduces populations of vertebrate seed dispersers. If reduced seed dispersal has a negative impact on tree population viability, overhunting could lead to altered forest structure and dynamics, including decreased biodiversity. However, empirical data showing decreased animal-dispersed tree abundance in overhunted forests contradict demographic models which predict minimal sensitivity of tree population growth rate to early life stages. One resolution to this discrepancy is that seed dispersal determines spatial aggregation, which could have demographic consequences for all life stages. We tested the impact of dispersal loss on population viability of a tropical tree species, Miliusa horsfieldii, currently dispersed by an intact community of large mammals in a Thai forest. We evaluated the effect of spatial aggregation for all tree life stages, from seeds to adult trees, and constructed simulation models to compare population viability with and without animal-mediated seed dispersal. In simulated populations, disperser loss increased spatial aggregation by fourfold, leading to increased negative density dependence across the life cycle and a 10-fold increase in the probability of extinction. Given that the majority of tree species in tropical forests are animal-dispersed, overhunting will potentially result in forests that are fundamentally different from those existing now.
Association of total mixed ration particle fractions retained on the Penn State Particle Separator with milk, fat, and protein yield lactation curves at the cow level
Caccamo, M. ; Ferguson, J.D. ; Veerkamp, R.F. ; Schadt, I. ; Petriflieri, R. ; Azzaro, G. ; Pozzebon, A. ; Licitra, G. - \ 2014
Journal of Dairy Science 97 (2014)4. - ISSN 0022-0302 - p. 2502 - 2511.
physically effective fiber - neutral detergent fiber - dairy-cows - grain fermentability - rumen fermentation - midlactation cows - corn-silage - ruminal ph - size - forage
As part of a larger project aiming to develop management evaluation tools based on results from test-day (TD) models, the objective of this study was to examine the effect of physical composition of total mixed rations (TMR) tested quarterly from March 2006 through December 2008 on milk, fat, and protein yield curves for 25 herds in Ragusa, Sicily. A random regression sire-maternal grandsire model was used to estimate variance components for milk, fat, and protein yields fitted on a full data set, including 241,153 TD records from 9,809 animals in 42 herds recorded from 1995 through 2008. The model included parity, age at calving, year at calving, and stage of pregnancy as fixed effects. Random effects were herd × test date, sire and maternal grandsire additive genetic effect, and permanent environmental effect modeled using third-order Legendre polynomials. Model fitting was carried out using ASREML. Afterward, for the 25 herds involved in the study, 9 particle size classes were defined based on the proportions of TMR particles on the top (19-mm) and middle (8-mm) screen of the Penn State Particle Separator. Subsequently, the model with estimated variance components was used to examine the influence of TMR particle size class on milk, fat, and protein yield curves. An interaction was included with the particle size class and days in milk. The effect of the TMR particle size class was modeled using a ninth-order Legendre polynomial. Lactation curves were predicted from the model while controlling for TMR chemical composition (crude protein content of 15.5%, neutral detergent fiber of 40.7%, and starch of 19.7% for all classes), to have pure estimates of particle distribution not confounded by nutrient content of TMR. We found little effect of class of particle proportions on milk yield and fat yield curves. Protein yield was greater for sieve classes with 10.4 to 17.4% of TMR particles retained on the top (19-mm) sieve. Optimal distributions different from those recommended may reflect regional differences based on climate and types and quality of forages fed.
Harvesting normative potential for nutrigenomic research
Penders, B. ; Korthals, M. - \ 2013
In: Nutrigenetics and nutrigenomics in functional foods and personalised nutrition / Ferguson, L.R., Boca Raton : CRC Press - ISBN 9781439876800 - p. 361 - 374.
Ecologia del paesaggio del Monte di Portofino / Landscape Ecology of the Monte di Portofino
Pedroli, G.B.M. ; Tagliasacchi, S. ; Sluis, T. van der - \ 2013
Wageningen : FERGUSON (Portus Delphini 2) - ISBN 9789077634028 - 457
landschapsecologie - ecologie - ecosystemen - geschiedenis - italië - landscape ecology - ecology - ecosystems - history - italy
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