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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PREVIEW study—Influence of a behavior modification intervention (PREMIT) in over 2300 people with pre-diabetes : Intention, self-efficacy and outcome expectancies during the early phase of a lifestyle intervention
Huttunen-Lenz, Maija ; Hansen, Sylvia ; Christensen, Pia ; Larsen, Thomas Meinert ; Sandø-Pedersen, Finn ; Drummen, Mathijs ; Adam, Tanja C. ; Macdonald, Ian A. ; Taylor, Moira A. ; Martinez, J.A. ; Navas-Carretero, Santiago ; Handjiev, Svetoslav ; Poppitt, Sally D. ; Silvestre, Marta P. ; Fogelholm, Mikael ; Pietiläinen, Kirsi H. ; Brand-Miller, Jennie ; Berendsen, Agnes A.M. ; Raben, Anne ; Schlicht, Wolfgang - \ 2018
Psychology Research and Behavior Management 11 (2018). - p. 383 - 394.
Cognition - Diabetes mellitus - Goals - Habits - Weight loss

Purpose: Onset of type 2 diabetes (T2D) is often gradual and preceded by impaired glucose homeostasis. Lifestyle interventions including weight loss and physical activity may reduce the risk of developing T2D, but adherence to a lifestyle change is challenging. As part of an international T2D prevention trial (PREVIEW), a behavior change intervention supported participants in achieving a healthier diet and physically active lifestyle. Here, our aim was to explore the influence of this behavioral program (PREMIT) on social-cognitive variables during an 8-week weight loss phase. Methods: PREVIEW consisted of an initial weight loss, Phase I, followed by a weight-maintenance, Phase II, for those achieving the 8-week weight loss target of ≥ 8% from initial bodyweight. Overweight and obese (BMI ≥25 kg/m2) individuals aged 25 to 70 years with confirmed pre-diabetes were enrolled. Uni-and multivariate statistical methods were deployed to explore differences in intentions, self-efficacy, and outcome expectancies between those who achieved the target weight loss (“achievers”) and those who did not (“non-achievers”). Results: At the beginning of Phase I, no significant differences in intentions, self-efficacy and outcome expectancies between “achievers” (1,857) and “non-achievers” (163) were found. “Non-achievers” tended to be younger, live with child/ren, and attended the PREMIT sessions less frequently. At the end of Phase I, “achievers” reported higher intentions (healthy eating χ2 (1)=2.57; P <0.008, exercising χ2 (1)=0.66; P <0.008), self-efficacy (F(2; 1970)=10.27, P <0.005), and were more positive about the expected outcomes (F(4; 1968)=11.22, P <0.005). Conclusion: Although statistically significant, effect sizes observed between the two groups were small. Behavior change, however, is multi-determined. Over a period of time, even small differences may make a cumulative effect. Being successful in behavior change requires that the “new” behavior is implemented time after time until it becomes a habit. Therefore, having even slightly higher self-efficacy, positive outcome expectancies and intentions may over time result in considerably improved chances to achieve long-term lifestyle changes.

Advancing urban green infrastructure in Europe : Outcomes and reflections from the GREEN SURGE project
Pauleit, Stephan ; Ambrose-Oji, Bianca ; Andersson, Erik ; Anton, Barbara ; Buijs, Arjen ; Haase, Dagmar ; Elands, Birgit ; Hansen, Rieke ; Kowarik, Ingo ; Kronenberg, Jakub ; Mattijssen, Thomas ; Stahl Olafsson, Anton ; Rall, Emily ; Jagt, Alexander P.N. van der - \ 2018
Urban Forestry and Urban Greening (2018). - ISSN 1618-8667 - 13 p.
Green governance and planning - Green infrastructure - GREEN SURGE - Sustainable urbanisation - Urban learning labs

Urban green infrastructure (UGI) is a promising concept when developing multifunctional green space systems to address major challenges of urbanization such as increasing social cohesion, promoting the transition to a green economy, adaptation to climate change and conservation of biodiversity. In response to the European Commission's Communication on Green Infrastructure from 2013, the GREEN SURGE project aimed to further advance the development of UGI in European cities by (i) strengthening the conceptual foundations of UGI, (ii) developing improved methods and tools for assessment of its state, benefits and governance and, (iii) applying these to build a stronger evidence base. This paper aims to provide an overall synthesis of the project's main achievements. GREEN SURGE adopted an inter- and transdisciplinary approach. Urban Learning Labs and focal Learning Alliances in five cities were instrumental for intensive collaboration between disciplines and across science and practice. Pan-European surveys, e.g. of planning and governance practice or human-nature interactions established the state-of-the-art across the continent and identified good practices. The project consolidated green infrastructure planning and governance conceptually, and it mapped opportunities for better linking government-led planning with bottom-up initiatives for creating and managing UGI. It also introduced a framework for knowledge integration to support UGI valuation. Importantly, development and application of the concept of biocultural diversity gave new insights into human–nature relationships in multicultural urban societies. The results strongly call for more context-sensitive development of UGI that addresses the different needs and diverse cultural practices of people engaging with nature. In a nutshell, GREEN SURGE showed that UGI indeed can make a major contribution to sustainable and resilient urbanisation. Transdisciplinary research in urban labs, if well-conceived, has shown to hold great potential to advance UGI concepts, methods, knowledge and practice.

Assessment of impact of traffic-related air pollution on morbidity and mortality in Copenhagen Municipality and the health gain of reduced exposure
Brønnum-Hansen, Henrik ; Bender, Anne Mette ; Jovanovic Andersen, Zorana ; Sørensen, Jan ; Bønløkke, Jakob Hjort ; Boshuizen, Hendriek ; Becker, Thomas ; Diderichsen, Finn ; Loft, Steffen - \ 2018
Environment International 121 (2018). - ISSN 0160-4120 - p. 973 - 980.
Air pollution - Disease modelling - Effect modelling - Health impact assessment - Prevention

Background: Health impact assessment (HIA) of exposure to air pollution is commonly based on city level (fine) particle concentration and may underestimate health consequences of changing local traffic. Exposure to traffic-related air pollution can be assessed at a high resolution by modelling levels of nitrogen dioxide (NO2), which together with ultrafine particles mainly originate from diesel-powered vehicles in urban areas. The purpose of this study was to estimate the health benefits of reduced exposure to vehicle emissions assessed as NO2 at the residence among the citizens of Copenhagen Municipality, Denmark. Methods: We utilized residential NO2 concentrations modelled by use of chemistry transport models to calculate contributions from emission sources to air pollution. The DYNAMO-HIA model was applied to the population of Copenhagen Municipality by using NO2 concentration estimates combined with demographic data and data from nationwide registers on incidence and prevalence of selected diseases, cause specific mortality, and total mortality of the population of Copenhagen. We used exposure-response functions linking NO2 concentration estimates at the residential address with the risk of diabetes, cardiovascular diseases, and respiratory diseases derived from a large Danish cohort study with the majority of subjects residing in Copenhagen between 1971 and 2010. Different scenarios were modelled to estimate the dynamic impact of NO2 exposure on related diseases and the potential health benefits of lowering the NO2 level in the Copenhagen Municipality. Results: The annual mean NO2 concentration was 19.6 μg/m3 and for 70% of the population the range of exposure was between 15 and 21 μg/m3. If NO2 exposure was reduced to the annual mean rural level of 6 μg/m3, life expectancy in 2040 would increase by one year. The greatest gain in disease-free life expectancy would be lifetime without ischemic heart disease (1.4 years), chronic obstructive pulmonary disease (1.5 years for men and 1.6 years for women), and asthma (1.3 years for men and 1.5 years for women). Lowering NO2 exposure by 20% would increase disease-free life expectancy for the different diseases by 0.3–0.5 years. Using gender specific relative risks affected the results. Conclusions: Reducing the NO2 exposure by controlling traffic-related air pollution reduces the occurrence of some of the most prevalent chronic diseases and increases life expectancy. Such health benefits can be quantified by DYNAMO-HIA in a high resolution exposure modelling. This paper demonstrates how traffic planners can assess health benefits from reduced levels of traffic-related air pollution.

Lignin Based Functional Additives for Natural Rubber
Barana, Davide ; Orlandi, Marco ; Zoia, Luca ; Castellani, Luca ; Hanel, Thomas ; Bolck, Christiaan ; Gosselink, Richard - \ 2018
ACS sustainable chemistry & engineering 6 (2018)9. - ISSN 2168-0485 - p. 11843 - 11852.
Chemical modification - Fractionation - Lignin valorization - Natural rubber - Solubility parameters

In this work, the possibility to conveniently exploit lignin as a functional additive for natural rubber was pursued following two strategies. The first was based on the fractionation of lignin: extraction with organic solvents is suitable to produce lignin fractions with better defined structural features, molecular weight distributions, and physicochemical properties. The second approach was based on the chemical modification of lignin in the attempt to overcome its poor affinity with the rubber: esterification with anhydrides was selected to modify relatively large samples of lignin at laboratory scale. The effectiveness of different modifications of lignin as a drop-in replacement for carbon black was evaluated analyzing the tensile mechanical properties of model elastomeric compounds. In addition, the behavior of the modified lignins was rationalized through Hansen solubility parameters predicted with the group-contribution method.

Demographic and Social-Cognitive Factors Associated with Weight Loss in Overweight, Pre-diabetic Participants of the PREVIEW Study
Hansen, Sylvia ; Huttunen-Lenz, Maija ; Sluik, Diewertje ; Brand-Miller, Jennie ; Drummen, Mathijs ; Fogelholm, Mikael ; Handjieva-Darlenska, Teodora ; Macdonald, Ian ; Martinez, Alfredo J. ; Larsen, Thomas Meinert ; Poppitt, Sally ; Raben, Anne ; Schlicht, Wolfgang - \ 2018
International Journal of Behavioral Medicine 25 (2018)6. - ISSN 1070-5503 - p. 682 - 692.
Behavioral determination - Lifestyle intervention - Social-cognitive factors - Weight loss

Purpose: Weight loss has been demonstrated to be a successful strategy in diabetes prevention. Although weight loss is greatly influenced by dietary behaviors, social-cognitive factors play an important role in behavioral determination. This study aimed to identify demographic and social-cognitive factors (intention, self-efficacy, outcome expectancies, social support, and motivation with regard to dietary behavior and goal adjustment) associated with weight loss in overweight and obese participants from the PREVIEW study who had pre-diabetes. Method: Prospective correlational data from 1973 adult participants were analyzed. The participants completed psychological questionnaires that assessed social-cognitive variables with regard to dietary behavior. Stepwise multiple regression analyses were performed to identify baseline demographic and social-cognitive factors associated with weight loss. Results: Overall, being male, having a higher baseline BMI, having a higher income, perceiving fewer disadvantages of a healthy diet (outcome expectancies), experiencing less discouragement for healthy eating by family and friends (social support), and lower education were independently linked to greater weight loss. When evaluating females and males separately, education was no longer associated with weight loss. Conclusion: The results indicate that a supportive environment in which family members and friends avoid discouraging healthy eating, with the application of a strategy that uses specific behavior change techniques to emphasize the benefits of outcomes, i.e., the benefits of a healthy diet, may support weight loss efforts. Weight loss programs should therefore always address the social environment of persons who try to lose body weight because family members and friends can be important supporters in reaching a weight loss goal.

Author Correction: Abundance and diversity of the faecal resistome in slaughter pigs and broilers in nine European countries
Munk, Patrick ; Knudsen, Berith Elkær ; Lukjancenko, Oksana ; Duarte, Ana Sofia Ribeiro ; Gompel, Liese Van; Luiken, Roosmarijn E.C. ; Smit, Lidwien A.M. ; Schmitt, Heike ; Garcia, Alejandro Dorado ; Hansen, Rasmus Borup ; Petersen, Thomas Nordahl ; Bossers, Alex ; Ruppé, Etienne ; Lund, Ole ; Hald, Tine ; Pamp, Sünje Johanna ; Vigre, Håkan ; Heederik, Dick ; Wagenaar, Jaap A. ; Mevius, Dik ; Aarestrup, Frank M. ; Graveland, Haitske ; Essen, Alieda van; Gonzalez-Zorn, Bruno ; Moyano, Gabriel ; Sanders, Pascal ; Chauvin, Claire ; David, Julie ; Battisti, Antonio ; Caprioli, Andrea ; Dewulf, Jeroen ; Blaha, Thomas ; Wadepohl, Katharina ; Brandt, Maximiliane ; Wasyl, Dariusz ; Skarzyńska, Magdalena ; Zajac, Magdalena ; Daskalov, Hristo ; Saatkamp, Helmut W. ; Stärk, Katharina D.C. - \ 2018
Nature Microbiology 3 (2018). - ISSN 2058-5276

In the version of this Article originally published, the surname of author Oksana Lukjancenko was spelt incorrectly as ‘Lukjacenko’. This has now been corrected.

Phenotypic trait variation measured on european genetic trials of fagus sylvatica L
Robson, Matthew T. ; Garzón, Marta Benito ; Miranda, Ricardo Alia ; Egido, Diana Barba ; Bogdan, Saša ; Borovics, Attila ; Božič, Gregor ; Brendel, Oliver ; Clark, Jo ; Vries, Sven M.G. de; Delehan, Ivan I. ; Ducousso, Alexis ; Fady, Bruno ; Fennessy, John ; Forstreuter, Manfred ; Frýdl, Josef ; Geburek, Thomas ; Gömöry, Dušan ; Hauke-Kowalska, Maria ; Huber, Gerhard ; Ibañez, Juan Ignacio ; Ioniţă, Lucia ; Ivankovič, Mladen ; Hansen, Jon Kehlet ; Kóczán-Horváth, Anikó ; Kraigher, Hojka ; Lee, Steve ; Liesebach, Mirko ; Mátyás, Csaba ; Mertens, Patrick ; Muhs, Hans Jakob ; Novotný, Petr ; Parnuţa, Gheorghe ; Paule, Ladislav ; Picardo, Alvaro ; Rasztovics, Ervin ; Rogge, Martin ; Stener, Lars Göran ; Sułkowska, Małgorzata ; Urban, Otmar ; Wuehlisch, Georg Von; Vendramin, Giovanni G. ; Vettori, Cristina ; Wesoły, Wojciech - \ 2018
Scientific Data 5 (2018). - ISSN 2052-4463
We present BeechCOSTe52; a database of European beech (Fagus sylvatica) phenotypic measurements for several traits related to fitness measured in genetic trials planted across Europe. The dataset was compiled and harmonized during the COST-Action E52 (2006-2010), and subsequently cross-validated to ensure consistency of measurement data among trials and provenances. Phenotypic traits (height, diameter at breast height, basal diameter, mortality, phenology of spring bud burst and autumn-leaf discoloration) were recorded in 38 trial sites where 217 provenances covering the entire distribution of European beech were established in two consecutive series (1993/95 and 1996/98). The recorded data refer to 862,095 measurements of the same trees aged from 2 to 15 years old over multiple years. This dataset captures the considerable genetic and phenotypic intra-specific variation present in European beech and should be of interest to researchers from several disciplines including quantitative genetics, ecology, biogeography, macroecology, adaptive management of forests and bioeconomy.
Forest Landscape Hydrology in a ‘New Normal’ Era of Climate and Land Use Change
Jones, Julia A. ; Wei, Xiaohua ; Noordwijk, M. van; Creed, Irena F. ; Gush, Mark ; Ellison, David ; Blanco, Juan A. ; Bishop, Kevin ; McNulty, Steven ; BarguésTobella, Aida ; Archer, E. ; Bruijnzeel, L.A. ; Duinker, P. ; Foster, David ; Gebrekirstos, Aster ; Giles-Hansen, Krysta ; Hacket-Pain, Andrew ; Harper, Richard J. ; Ilstedt, Ulrik ; Li, Qiang ; Liao, Yingchun ; Malmer, Anders ; Mwangi, Hosea ; Orland, Chloé ; Steenberg, James ; Wang, Yi ; Worthy, Fiona ; Xu, Jianchu ; Zhang, Mingfang - \ 2018
In: Forest and Water on a Changing Planet: Vulnerability, Adaptation and Governance Opportunities / Creed, Irena F., van Noordwijk, Meine, International Union of Forest Research Organizations (IUFRO) (IUFRO World Series ) - ISBN 9783902762955 - p. 81 - 99.
Abundance and diversity of the faecal resistome in slaughter pigs and broilers in nine European countries
Munk, Patrick ; Knudsen, Berith Elkær ; Lukjacenko, Oksana ; Duarte, Ana Sofia Ribeiro ; Gompel, Liese Van; Luiken, Roosmarijn E.C. ; Smit, Lidwien A.M. ; Schmitt, Heike ; Garcia, Alejandro Dorado ; Hansen, Rasmus Borup ; Petersen, Thomas Nordahl ; Bossers, Alex ; Ruppé, Etienne ; Graveland, Haitske ; Essen, Alieda van; Gonzalez-Zorn, Bruno ; Moyano, Gabriel ; Sanders, Pascal ; Chauvin, Claire ; David, Julie ; Battisti, Antonio ; Caprioli, Andrea ; Dewulf, Jeroen ; Blaha, Thomas ; Wadepohl, Katharina ; Brandt, Maximiliane ; Wasyl, Dariusz ; Skarzyńska, Magdalena ; Zajac, Magdalena ; Daskalov, Hristo ; Saatkamp, Helmut W. ; Stärk, Katharina D.C. ; Lund, Ole ; Hald, Tine ; Pamp, Sünje Johanna ; Vigre, Håkan ; Heederik, Dick ; Wagenaar, Jaap A. ; Mevius, Dik ; Aarestrup, Frank M. - \ 2018
Nature Microbiology 3 (2018)8. - ISSN 2058-5276 - p. 898 - 908.

Antimicrobial resistance (AMR) in bacteria and associated human morbidity and mortality is increasing. The use of antimicrobials in livestock selects for AMR that can subsequently be transferred to humans. This flow of AMR between reservoirs demands surveillance in livestock and in humans. We quantified and characterized the acquired resistance gene pools (resistomes) of 181 pig and 178 poultry farms from nine European countries, sequencing more than 5,000 Gb of DNA using shotgun metagenomics. We quantified acquired AMR using the ResFinder database and a second database constructed for this study, consisting of AMR genes identified through screening environmental DNA. The pig and poultry resistomes were very different in abundance and composition. There was a significant country effect on the resistomes, more so in pigs than in poultry. We found higher AMR loads in pigs, whereas poultry resistomes were more diverse. We detected several recently described, critical AMR genes, including mcr-1 and optrA, the abundance of which differed both between host species and between countries. We found that the total acquired AMR level was associated with the overall country-specific antimicrobial usage in livestock and that countries with comparable usage patterns had similar resistomes. However, functionally determined AMR genes were not associated with total drug use.

Circadian misalignment induces fatty acid metabolism gene profiles and induces insulin resistance in human skeletal muscle
Wefers, Jakob ; Moorsel, Dirk van; Hansen, Jan ; Hooiveld, G.J.E.J. ; Kersten, A.H. ; Schrauwen, Patrick - \ 2018
GSE106800 - Homo sapiens - PRJNA418092
Circadian misalignment, such as in shift work, has been associated with obesity and type 2 diabetes, however, direct effects of circadian misalignment on skeletal muscle insulin sensitivity and muscle molecular circadian clock have never been investigated in humans. Here we investigated insulin sensitivity and muscle metabolism in fourteen healthy young lean men (age 22.4 ± 2.8 years; BMI 22.3 ± 2.1 kg/m2 [mean ± SD]) after a 3-day control protocol and a 3.5-day misalignment protocol induced by a 12-h rapid shift of the behavioral cycle. We show that circadian misalignment results in a significant decrease in peripheral insulin sensitivity due to a reduced skeletal muscle non-oxidative glucose disposal (Rate of disappearance: 23.7 ± 2.4 vs. 18.4 ± 1.4 mg/kg/min; control vs. misalignment; p=0.024). Fasting glucose and FFA levels as well as sleeping metabolic rate were higher during circadian misalignment. Molecular analysis of skeletal muscle biopsies revealed that the molecular circadian clock was not aligned to the new behavourial rhythm, and microarray analysis revealed the human PPAR pathway as a key player in the disturbed energy metabolism upon circadian misallignement. Our findings may provide a mechanism underlying the increased risk of type 2 diabetes among shift workers.
Circadian misalignment induces fatty acid metabolism gene profiles and compromises insulin sensitivity in human skeletal muscle
Wefers, Jakob ; Moorsel, Dirk van; Hansen, Jan ; Connell, Niels J. ; Havekes, Bas ; Hoeks, Joris ; Marken Lichtenbelt, Wouter D. van; Duez, Hélène ; Phielix, Esther ; Kalsbeek, Andries ; Boekschoten, Mark V. ; Hooiveld, Guido J. ; Hesselink, Matthijs K.C. ; Kersten, Sander ; Staels, Bart ; Scheer, Frank A.J.L. ; Schrauwen, Patrick - \ 2018
Proceedings of the National Academy of Sciences of the United States of America 115 (2018)30. - ISSN 0027-8424 - p. 7789 - 7794.
Circadian misalignment, such as in shift work, has been associated with obesity and type 2 diabetes. However, direct effects of circadian misalignment on skeletal muscle insulin sensitivity and the muscle molecular circadian clock have never been studied in humans. Here, we investigated insulin sensitivity and muscle metabolism in 14 healthy young lean men [age 22.4 ± 2.8 years; body mass index (BMI) 22.3 ± 2.1 kg/m2 (mean ± SD)] after a 3-d control protocol and a 3.5-d misalignment protocol induced by a 12-h rapid shift of the behavioral cycle. We show that short-term circadian misalignment results in a significant decrease in muscle insulin sensitivity due to a reduced skeletal muscle nonoxidative glucose disposal (rate of disappearance: 23.7 ± 2.4 vs. 18.4 ± 1.4 mg/kg per minute; control vs. misalignment; P = 0.024). Fasting glucose and free fatty acid levels as well as sleeping metabolic rate were higher during circadian misalignment. Molecular analysis of skeletal muscle biopsies revealed that the molecular circadian clock was not aligned to the inverted behavioral cycle, and transcriptome analysis revealed the human PPAR pathway as a key player in the disturbed energy metabolism upon circadian misalignment. Our findings may provide a mechanism underlying the increased risk of type 2 diabetes among shift workers.
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 - \ 2018
Urban Forestry and Urban Greening (2018). - ISSN 1618-8667 - 10 p.
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.
The ALFAM2 database on ammonia emission from field-applied manure : Description and illustrative analysis
Hafner, Sasha D. ; Pacholski, Andreas ; Bittman, Shabtai ; Burchill, William ; Bussink, Wim ; Chantigny, Martin ; Carozzi, Marco ; Génermont, Sophie ; Häni, Christoph ; Hansen, Martin N. ; Huijsmans, Jan ; Hunt, Derek ; Kupper, Thomas ; Lanigan, Gary ; Loubet, Benjamin ; Misselbrook, Tom ; Meisinger, John J. ; Neftel, Albrecht ; Nyord, Tavs ; Pedersen, Simon V. ; Sintermann, Jörg ; Thompson, Rodney B. ; Vermeulen, Bert ; Voylokov, Polina ; Williams, John R. ; Sommer, Sven G. - \ 2018
Agricultural and Forest Meteorology 258 (2018). - ISSN 0168-1923 - p. 66 - 79.
Ammonia - Cattle - Emission - Manure - Pig - Slurry
Ammonia (NH3) emission from animal manure contributes to air pollution and ecosystem degradation, and the loss of reactive nitrogen (N) from agricultural systems. Estimates of NH3 emission are necessary for national inventories and nutrient management, and NH3 emission from field-applied manure has been measured in many studies over the past few decades. In this work, we facilitate the use of these data by collecting and organizing them in the ALFAM2 database. In this paper we describe the development of the database and summarise its contents, quantify effects of application methods and other variables on emission using a data subset, and discuss challenges for data analysis and model development. The database contains measurements of emission, manure and soil properties, weather, application technique, and other variables for 1895 plots from 22 research institutes in 12 countries. Data on five manure types (cattle, pig, mink, poultry, mixed, as well as sludge and "other") applied to three types of crops (grass, small grains, maize, as well as stubble and bare soil) are included. Application methods represented in the database include broadcast, trailing hose, trailing shoe (narrow band application), and open slot injection. Cattle manure application to grassland was the most common combination, and analysis of this subset (with dry matter (DM) limited to <15%) was carried out using mixed- and fixed-effects models in order to quantify effects of management and environment on ammonia emission, and to highlight challenges for use of the database. Measured emission in this subset ranged from <1% to 130% of applied ammonia after 48 h. Results showed clear, albeit variable, reductions in NH3 emission due to trailing hose, trailing shoe, and open slot injection of slurry compared to broadcast application. There was evidence of positive effects of air temperature and wind speed on NH3 emission, and limited evidence of effects of slurry DM. However, random-effects coefficients for differences among research institutes were among the largest model coefficients, and showed a deviation from the mean response by more than 100% in some cases. The source of these institute differences could not be determined with certainty, but there is some evidence that they are related to differences in soils, or differences in application or measurement methods. The ALFAM2 database should be useful for development and evaluation of both emission factors and emission models, but users need to recognize the limitations caused by confounding variables, imbalance in the dataset, and dependence among observations from the same institute. Variation among measurements and in reported variables highlights the importance of international agreement on how NH3 emission should be measured, along with necessary types of supporting data and standard protocols for their measurement. Both are needed in order to produce more accurate and useful ammonia emission measurements. Expansion of the ALFAM2 database will continue, and readers are invited to contact the corresponding author for information on data submission. The latest version of the database is available at http://www.alfam.dk.
Sustainability transitions in developing countries : Stocktaking, new contributions and a research agenda
Hansen, Ulrich Elmer ; Nygaard, Ivan ; Romijn, Henny ; Wieczorek, Anna ; Kamp, Linda M. ; Klerkx, Laurens - \ 2018
Environmental Science & Policy 84 (2018). - ISSN 1462-9011 - p. 198 - 203.
Developing countries - Geography of transitions - Inclusive development - Inclusive innovation - Niche development - Socio-technical regimes - Sustainability transitions
An increasing number of studies have analysed the scope for, and the barriers to, transitions toward sustainability in the context of developing countries building on analytical perspectives from the sustainability transitions literature. This paper introduces a special issue on sustainability transitions in developing countries, which takes stock of this emerging field of research and presents new empirical research that contributes to further advancement of our understanding of the conditions in which sustainability transitions are likely to take place in developing countries and what is involved in these transformative processes. This introductory paper presents the five papers contained in the special issue. The first paper comprises a review of the existing literature on the subject, and the other four papers present new empirical research. The key findings of the papers are discussed in relation to previous research in the field specifically related to four crosscutting themes: (i) global-local linkages and external dependencies; (ii) stability and non-stability of regimes; (iii) undemocratic and non-egalitarian nature of regimes; and (iv) nurturing the development of niches versus the execution of individual projects. The introductory paper concludes by presenting a research agenda, which aims to provide promising avenues for future research on sustainability transitions in developing countries.
Accounting for access costs in validation of soil maps : A comparison of design-based sampling strategies
Yang, Lin ; Brus, Dick J. ; Zhu, A.X. ; Li, Xinming ; Shi, Jingjing - \ 2018
Geoderma 315 (2018). - ISSN 0016-7061 - p. 160 - 169.
Digital soil mapping - Mean squared error - Optimal stratification - Probability sampling - Sampling with probabilities-proportional-to-size - Stratified random sampling
The quality of soil maps can best be estimated by collecting additional data at locations selected by probability sampling. These data can be used in design-based estimation of map quality measures such as the population mean of the squared prediction errors (MSE) for continuous soil maps and overall accuracy for categorical soil maps. In areas with large differences in access costs it can be attractive to account for these differences in selecting validation locations. In this paper two types of sampling design are compared that take access costs into account: sampling with probabilities proportional to size (pps) and stratified simple random sampling (STSI). In pps the inverse of the square root of the access costs is used as a size variable. Two estimators of MSE are applied, the Hansen-Hurwitz and Hajek estimator. In STSI optimal strata are constructed based on access costs. Simple random sampling (SI) is taken as a reference design. The sampling strategies were compared on the basis of: 1) the variance of the estimated MSE; 2) the variance of the total pointwise access costs; 3) the 95-percentile of the sampling distribution of the total access costs. The comparison was done at equal expected total pointwise access costs. The sampling strategies were compared in a simulation study and a real-world case study in Anhui, China. In the case study car travel and hiking costs were considered in computing access costs per point. The results showed that the variance of estimated MSE with pps(Hansen-Hurwitz) was larger than with pps(Hajek) and STSI. The variances of estimated MSE of pps(Hajek) and STSI were about equal and smaller than that of SI. The gain in precision compared to SI depends on the cost distribution. The larger the coefficient of variation of the costs, the larger the gain. The 95 percentile of the sampling distribution of the total pointwise access costs with STSI was smaller than with pps and SI. The gain in precision of pps(Hajek) and STSI was about 30% accounting for hiking costs only, and about 10% accounting for the sum of car travel and hiking costs in the case study. The proposed sampling strategies are of interest for surveying any soil property in areas with marked differences in access costs, not just for validation of soil maps.
The ATLAS school-based health promotion programme : Does a need-supportive learning context help to motivate adolescent boys?
Dongen, Bonnie van; Finn, Tara ; Hansen, Vibeke ; Wagemakers, Annemarie ; Lubans, David ; Dally, Kerry - \ 2018
European Physical Education Review 24 (2018)3. - ISSN 1356-336X - p. 330 - 348.
Adolescent boys living in disadvantaged communities are considered a vulnerable group at risk for developing obesity and associated health problems, such as cardiovascular disease, hypertension and type-2 diabetes. While short-term health promotion programmes often produce effective results during the implementation of the intervention, according to self-determination theory (SDT), changes in autonomous motivation are required if programmes are to have sustained effects on health behaviours. This article describes the ATLAS (Active Teen Leaders Avoiding Screen-time) programme, based on SDT, which was developed to engage adolescent boys from low socio-economic backgrounds in physical activity, reduce their consumption of sugar-sweetened beverages and limit recreational screen-time. The article reports a post-hoc analysis of the perceptions and experiences of a representative group of ATLAS participants to investigate whether the boys’ general impressions of the programme reflected the need-supportive teaching strategies on which the programme was based. The results of this analysis suggested that students’ comments about increased feelings of autonomy, competence and relatedness were often linked to corresponding need-supportive teacher behaviours. The findings suggest that embedding health promotion programmes in a need-supportive context can help to foster the motivation and self-regulation that is required to maintain newly adopted healthier behaviours.
Terrestrial invertebrate biomonitoring through environmental DNA metabarcoding
Qin, J. ; Groot, G.A. de; Frøslev, T.G. ; Schmelz, R. ; Petráková, L. ; Gravesen, E. ; Dall’Olio, L.R. ; Hansen, L.H. ; Hansen, A.J. ; Krogh, P.H. - \ 2017
Sustainable Nitrogen Management in Denmark
Dalgaard, Tommy ; Brock, S. ; Graversgaard, Morten ; Hansen, Brigitte ; Hashemi, F. ; Häsler, B. ; Hertel, O. ; Hutchings, N.J. ; Jacobsen, B.H. ; Stoumann Jensen, L. ; Kjeldsen, Chris ; Olesen, J.E. ; Schjorring, J.K. ; Sigsgaard, T. ; Stubkjaer Andersen, P. ; Termansen, Mette ; Vejre, H. ; Vestergaard Odgaard, M. ; Vries, W. de; Wiborg, I.A. - \ 2017
In: Innovative solutions for sustainable management of nitrogen. - Aarhus University and the dNmark.org Research Alliance - ISBN 9788793398825 - p. 13 - 16.
Innovative solutions for sustainable management of nitrogen : Conference proceedings
Dalgaard, Tommy ; Olesen, J.E. ; Schjorring, J.K. ; Jensen, J.S. ; Vejre, H. ; Andersen, P.S. ; Gundersen, P. ; Jacobsen, B.H. ; Jensen, J. ; Häsler, B. ; Termansen, Mette ; Hertel, O. ; Brock, S. ; Kronvang, B. ; Svenning, Jens Christian ; Sigsgaard, T. ; Hansen, B. ; Thorling, L. ; Højberg, A.L. ; Wiborg, I.A. ; Piil, K. ; Kjeldsen, Chris ; Graversgaard, Morten ; Hutchings, N. ; Vries, W. de; Christensen, J. ; Mukendi, T. - \ 2017
Aarhus University and the dNmark.org Research Alliance - ISBN 9788793398825 - 142 p.
The Impact of Social and Financial Education on Savings Attitudes and Behavior Among Primary School Children in Uganda
Supanantaroek, Suthinee ; Lensink, Robert ; Hansen, Nina - \ 2017
Evaluation Review 41 (2017)6. - ISSN 0193-841X - p. 511 - 541.
attitudes - children - financial literacy - intervention - saving and spending - social and financial education - training
Background: Saving plays a crucial role in the process of economic growth. However, one main reason why poor people often do not save is that they lack financial knowledge. Improving the savings culture of children through financial education is a promising way to develop savings attitudes and behavior early in life. Objectives: This study is one of the first that examines the effects of social and financial education training and a children’s club developed by Aflatoun on savings attitudes and behavior among primary school children in Uganda, besides Berry, Karlan, and Pradhan. Research design: A randomized phase in approach was used by randomizing the order in which schools implemented the program (school-level randomization). The treatment group consisted of students in schools where the program was implemented, while in the control group the program was not yet implemented. The program lasted 3 months including 16 hours. We compared posttreatment variables for the treatment and control group. Subjects: Study participants included 1,746 students, of which 936 students were from 22 schools that were randomly assigned to receive the program between May and July 2011; the remaining 810 students attended 22 schools that did not implement the program during the study period. Measures: Indicators for children’s savings attitudes and behavior were key outcomes. Results: The intervention increased awareness of money, money recording, and savings attitudes. It also provides some evidence—although less robust—that the intervention increased actual savings. Conclusions: A short financial literacy and social training can improve savings attitudes and behavior of children considerably.
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