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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    Genomics of Rapid Evolution in Field Crickets
    Pascoal, Sonia ; Risse, Judith ; Zhang, Xiao ; Blaxter, Mark ; Cezard, Timothee ; Challis, Richard J. ; Gharbi, Karim ; Hunt, John ; Kumar, Sujai ; Langan, Emma ; Liu, Xuan ; Rayner, Jack G. ; Ritchie, Michael G. ; Snoek, Basten ; Trivedi, Urmi ; Bailey, Nathan W. - \ 2020
    University of Edinburgh
    PRJEB24786 - ERP106639 - Teleogryllus oceanicus - cricket - genomics
    This study reveals the genomic architecture of a rapidly evolving mutation which segregates as a single-locus, X-linked trait -- flatwing -- in wild Hawaiian field crickets (Teleogryllus oceanicus). Flatwingsilences males by eliminating sound-producing structures on their forewings. Silence protects them from an acoustically-orienting parasitoid fly (Ormia ochracea), but interferes with their ability to attract and court females for mating. Silent crickets spread rapidly on several Hawaiian islands under pressure from the flies, representing one of the fastest rates of evoutionary change documented in the wild. Here we present an annotated genome sequence of T. oceanicus along with a linkage map and QTL analysis of the trait derived from RAD-sequencing of a backcrossed mapping population. RNA-seq was used to probe the functional pathways affected by the mutation during early development, and pleiotropic effects on another signaling trait, cuticular hydrocarbons, were assessed and genetically mapped.
    Field cricket genome reveals the footprint of recent, abrupt adaptation in the wild
    Pascoal, Sonia ; Risse, Judith E. ; Zhang, Xiao ; Blaxter, Mark ; Cezard, Timothee ; Challis, Richard J. ; Gharbi, Karim ; Hunt, John ; Kumar, Sujai ; Langan, Emma ; Liu, Xuan ; Rayner, Jack G. ; Ritchie, Michael G. ; Snoek, Basten L. ; Trivedi, Urmi ; Bailey, Nathan W. - \ 2020
    Evolution Letters 4 (2020)1. - ISSN 2056-3744 - p. 19 - 33.
    Evolutionary adaptation is generally thought to occur through incremental mutational steps, but large mutational leaps can occur during its early stages. These are challenging to study in nature due to the difficulty of observing new genetic variants as they arise and spread, but characterizing their genomic dynamics is important for understanding factors favoring rapid adaptation. Here, we report genomic consequences of recent, adaptive song loss in a Hawaiian population of field crickets (Teleogryllus oceanicus). A discrete genetic variant, flatwing, appeared and spread approximately 15 years ago. Flatwing erases sound‐producing veins on male wings. These silent flatwing males are protected from a lethal, eavesdropping parasitoid fly. We sequenced, assembled and annotated the cricket genome, produced a linkage map, and identified a flatwing quantitative trait locus covering a large region of the X chromosome. Gene expression profiling showed that flatwing is associated with extensive genome‐wide effects on embryonic gene expression. We found that flatwing male crickets express feminized chemical pheromones. This male feminizing effect, on a different sexual signaling modality, is genetically associated with the flatwing genotype. Our findings suggest that the early stages of evolutionary adaptation to extreme pressures can be accompanied by greater genomic and phenotypic disruption than previously appreciated, and highlight how abrupt adaptation might involve suites of traits that arise through pleiotropy or genomic hitchhiking.
    Cost-effective management of coastal eutrophication: A case study for the yangtze river basin
    Strokal, M. ; Kahil, T. ; Wada, Y. ; Albiac, J. ; Bai, Z. ; Ermolieva, T. ; Langan, S. ; Ma, L. ; Oenema, O. ; Wagner, F. ; Zhu, X. ; Kroeze, C. - \ 2020
    Resources, Conservation and Recycling 154 (2020). - ISSN 0921-3449
    Cost-effective management - Eutrophication - Integrated modelling - Nitrogen and phosphorus - Nutrient management - Waste recycling

    Many water resources are threatened with nutrient pollution worldwide. This holds for rivers exporting increasing amounts of nutrients from the intensification of food production systems and further urbanization. This riverine nutrient transport causes coastal eutrophication. This study aims to identify cost-effective management options to simultaneously reach environmental targets for river export of nitrogen and phosphorus by the Yangtze River (China) in 2050. A newly developed modelling approach is used that integrates the Model to Assess River Inputs of Nutrients to seAs (MARINA) with a cost-optimization procedure, and accounts for socio-economic developments, land use and climate changes in a spatially explicit way. The environmental targets for river export of nutrients aim to reduce the gap between baseline and desirable nutrient export. Our baseline is based on MARINA projections for future river export of nutrients, while the desirable nutrient export reflects a low eutrophication potential. Results show the possibilities to close the gap in river export of both nutrients by 80–90% at a cost of 1–3 billion $ per year in 2050. Recycling of animal waste on cropland is an important cost-effective option; reducing synthetic fertilizer inputs provides an opportunity to compensate for the additional costs of the recycling and treatment of manure and wastewater. Our study provides new insights on the combination of cost-effective management options for sub-basins of the Yangtze. This can support the design of cost-effective and sub-basin specific management options for reducing future water pollution.

    RNA-seq data from Teleogryllus oceanicus embryos of silent and singing morphs
    Pascoal, Sonia ; Risse, Judith ; Zhang, Xiao ; Blaxter, Mark ; Cezard, Timothee ; Challis, Richard J. ; Gharbi, Karim ; Hunt, John ; Kumar, Sujai ; Langan, Emma ; Liu, Xuan ; Rayner, Jack G. ; Ritchie, Michael G. ; Snoek, Basten ; Trivedi, Urmi ; Bailey, Nathan W. - \ 2019
    University of St Andrews
    PRJEB27235 - ERP109294 - Teleogryllus oceanicus
    RNA-seq data collected from Teleogryllus oceanicus of silent and singing morphs at embryonic stages
    SBfI RADseq of Teleogryllus oceanicus F3 cross between Daintree and Kailua flat-wing crickets
    Pascoal, Sonia ; Risse, Judith ; Zhang, Xiao ; Blaxter, Mark ; Cezard, Timothee ; Gharbi, Karim ; Hunt, John ; Kumar, Sujai ; Langan, Emma ; Liu, Xuan ; Rayner, Jack G. ; Ritchie, Michael G. ; Snoek, Basten ; Trivedi, Urmi ; Bailey, Nathan W. - \ 2019
    Wageningen University
    PRJEB29921 - ERP112280 - Teleogryllus oceanicus
    Integrated modelling and management of water resources: the ecosystem perspective on the nexus approach
    Hülsmann, Stephan ; Sušnik, Janez ; Rinke, Karsten ; Langan, Simon ; Wijk, Dianneke van; Janssen, Annette B.G. ; Mooij, Wolf M. - \ 2019
    Current Opinion in Environmental Sustainability 40 (2019). - ISSN 1877-3435 - p. 14 - 20.

    Addressing challenges of water, energy and food security, nexus approaches towards resources management are being developed and starting to be implemented. However, the ecosystem perspective, essential for sustainable resources management, has been identified as a missing element within earlier nexus assessments. With regard to water they have mainly focused on the allocation to different sectors and users, while ecosystem services were rarely explicitly addressed. Existing aquatic ecosystem models are capable of quantifying a wide range of ecosystem services, but have thus far not been comprehensively used in a nexus context. Recent developments in aquatic ecosystem modelling approaches provide opportunities to achieve the sought integration of ecosystem services in the nexus approach. Therefore, we argue for a stronger role of aquatic ecosystem models in nexus assessments.

    Increasing nitrogen export to sea: A scenario analysis for the Indus River
    Wang, Mengru ; Tang, Ting ; Burek, P. ; Havlík, Petr ; Krisztin, Tamás ; Kroeze, Carolien ; Leclère, D. ; Strokal, Maryna ; Wada, Yoshihide ; Wang, Yaoping ; Langan, S. - \ 2019
    Science of the Total Environment 694 (2019). - ISSN 0048-9697
    Indus River - Nitrogen sources - Representative concentration pathways - River export of nitrogen (N) - Shared socio-economic pathways - Sub-basins

    The Indus River Basin faces severe water quality degradation because of nutrient enrichment from human activities. Excessive nutrients in tributaries are transported to the river mouth, causing coastal eutrophication. This situation may worsen in the future because of population growth, economic development, and climate change. This study aims at a better understanding of the magnitude and sources of current (2010) and future (2050) river export of total dissolved nitrogen (TDN) by the Indus River at the sub-basin scale. To do this, we implemented the MARINA 1.0 model (Model to Assess River Inputs of Nutrients to seAs). The model inputs for human activities (e.g., agriculture, land use) were mainly from the GLOBIOM (Global Biosphere Management Model) and EPIC (Environmental Policy Integrated Model) models. Model inputs for hydrology were from the Community WATer Model (CWATM). For 2050, three scenarios combining Shared Socio-economic Pathways (SSPs 1, 2 and 3) and Representative Concentration Pathways (RCPs 2.6 and 6.0) were selected. A novelty of this study is the sub-basin analysis of future N export by the Indus River for SSPs and RCPs. Result shows that river export of TDN by the Indus River will increase by a factor of 1.6–2 between 2010 and 2050 under the three scenarios. >90% of the dissolved N exported by the Indus River is from midstream sub-basins. Human waste is expected to be the major source, and contributes by 66–70% to river export of TDN in 2050 depending on the scenarios. Another important source is agriculture, which contributes by 21–29% to dissolved inorganic N export in 2050. Thus a combined reduction in both diffuse and point sources in the midstream sub-basins can be effective to reduce coastal water pollution by nutrients at the river mouth of Indus.

    Bridging global, basin and local-scale water quality modeling towards enhancing water quality management worldwide
    Tang, Ting ; Strokal, Maryna ; Vliet, Michelle T.H. van; Seuntjens, Piet ; Burek, Peter ; Kroeze, Carolien ; Langan, Simon ; Wada, Yoshihide - \ 2019
    Current Opinion in Environmental Sustainability 36 (2019). - ISSN 1877-3435 - p. 39 - 48.

    Global water quality (WQ) modeling is an emerging field. In this article, we identify the missing linkages between global and basin/local-scale WQ models, and discuss the possibilities to fill these gaps. We argue that WQ models need stronger linkages across spatial scales. This would help to identify effective scale-specific WQ management options and contribute to future development of global WQ models. Two directions are proposed to improve the linkages: nested multiscale WQ modeling towards enhanced water management, and development of next-generation global WQ models based-on basin/local-scale mechanistic understanding. We highlight the need for better collaboration among WQ modelers and policy-makers in order to deliver responsive water policies and management strategies across scales.

    Global multi-pollutant modelling of water quality: scientific challenges and future directions
    Strokal, M. ; Spanier, Emiel ; Kroeze, C. ; Koelmans, A.A. ; Florke, Martina ; Franssen, W.H.P. ; Hofstra, N. ; Langan, Simon ; Ting, Tang ; Vliet, M.T.H. van; Wada, Yoshihide ; Wang, M. ; Wijnen, Jikke van; Williams, R. - \ 2019
    Current Opinion in Environmental Sustainability 36 (2019). - ISSN 1877-3435 - p. 116 - 125.
    Assessing global water quality issues requires a multi-pollutant modelling approach. We discuss scientific challenges and future directions for such modeling. Multi-pollutant river models need to integrate information on sources of pollutants such as plastic debris, nutrients, chemicals, pathogens, their effects and possible solutions. In this paper, we first explain what we consider multi-pollutant modelling. Second, we discuss scientific challenges in multi-pollutant modelling relating to consistent model inputs, modelling approaches and model evaluation. Next, we illustrate the potential of global multi-pollutant modelling for hotspot analyses. We show hotspots of river pollution with microplastics, nutrients, triclosan and Cryptosporidium in many sub-basins of Europe, North America and South Asia. Finally, we reflect on future directions for multi-pollutant modelling, and for linking model results to policy-making.
    Bridging global and basin scale water quality modeling towards enhancing global water quality modeling and management
    Tang, Ting ; Wada, Yoshihide ; Strokal, M. ; Burek, P. ; Langan, Simon - \ 2018
    Geophysical Research Abstracts 20 (2018). - ISSN 1029-7006 - 1 p.
    Operation and maintenance costs of offshore wind farms and potential multi-use platforms in the Dutch North Sea
    Rockmann, C. ; Lagerveld, S. ; Stavenuiter, J. - \ 2017
    In: Aquaculture perspective of multi-use sites in the open ocean / Buck, Bela, Langan, Richard, Springer - ISBN 9783319511573 - p. 97 - 113.
    Aquaculture within offshore wind farms has been identified as one of the many possibilities of smart use of marine space, leading to opportunities for innovative entrepreneurship. Offshore areas potentially pose less conflict with co-users than onshore. At the same time, offshore areas and offshore constructions are prone to high technical risks through mechanical force, corrosion, and biofouling. The expected lifetime of an offshore structure is to a great extent determined by the risk of failures. This chapter elaborates on logistical challenges that the offshore industry faces. Operation and maintenance (O&M) activities typically represent a big part of the total costs (e.g. 25–30% of the total lifecycle costs for offshore wind farms). The offshore wind energy sector is considered an industry with promising features for the public and private sector. Large wind farms farther off the coast pose high expectations because of higher average wind speeds and hence greater wind energy yield (in terms of megawatts per capital). These conditions entail additional challenges in logistics, though. One of the main hurdles that hinders use of offshore wind energy is the high cost for O&M. The offshore wind industry will have to solve these problems in order to achieve substantial cost reduction - alone or jointly with other (potential) users. It is precisely the logistical problems around O&M where most likely synergy benefits of multi-use platforms (MUPs) can be achieved. The offshore wind energy industry is eagerly looking for technical innovations. Until now they mostly sought the solutions in their own circles. If the combination of offshore wind energy and offshore aquaculture proves to be feasible and profitable in practice, there may be an additional possibility to reduce the O&M costs by synergy effects of the combined operations. Logistic waiting times, for example, can result in substantial revenue losses, whereas timely spare-parts supply or sufficient repair capacity (technicians) to shorten the logistic delay times are beneficial. A recent study suggests that a cost reduction of 10% is feasible, if the offshore wind and offshore aquaculture sectors are combined in order to coordinate and share O&M together. The presented asset management control model proves useful in testing the innovative, interdisciplinary multi-use concepts, simulating return rates under different assumptions, thus making the approach more concrete and robust.
    Technical risks of offshore structures
    Klijnstra, J. ; Zhang, X. ; Putten, Sjoerd van der; Rockmann, C. - \ 2017
    In: Aquaculture perspective of multi-use sites in the open ocean / Buck, Bela, Langan, Richard, Springer - ISBN 9783319511573 - p. 115 - 127.
    Offshore areas are rough and high energy areas. Therefore, offshore constructions are prone to high technical risks. This chapter elaborates on the technical risks of corrosion and biofouling and technical risks through mechanical force. The expected lifetime of an offshore structure is to a great extent determined by the risk of failures through such risks. Corrosion and biofouling threaten the robustness of offshore structures. Detailed and standardized rules for protection against corrosion of offshore structures are currently lacking. There is a need for an accepted uniform specification. A major technical risk of a combined wind-mussel farm is that of a drifting aquaculture construction that strikes a wind turbine foundation. We investigate two scenarios related to this risk: (1) Can a striking aquaculture construction cause a significant damage to the foundation? (2) If a drifting aquaculture construction gets stuck around a turbine foundation and thus increases its surface area, can the foundation handle the extra (drag) forces involved? A preliminary qualitative assessment of these scenarios leads to the conclusion that a drifting mussel or seaweed farm does not pose a serious technical threat to the foundation of a wind farm. Damage to the (anticorrosive) paint of the turbine foundation is possible, but this will not lead to short term structural damage. Long term corrosion and damage risks can be prevented by taking appropriate maintenance and repair actions. Contrarily to mussel or seaweed farms, the impact/threat of a drifting fish farm on structural damage to a wind foundation depends on type, size and the way of construction of the fish cages. The risk of extra drag force due to a stuck aquaculture construction relates particularly to jacket constructions because any stuck construction may lead to (strong) increase of the frontal surface area of the immersed jacket structure and thereby give increased drag forces from currents or waves. To ensure an optimal lifetime and lower operational costs maintenance aspects of materials for both offshore wind and aquaculture constructions should be taken into account already in the design phase of combined infrastructure.
    Derivation of critical loads by steady-state and dynamic soil models
    Posch, M. ; Vries, W. de - \ 1999
    In: The impact of nitrogen deposition on natural and semi-natural ecosystems / Langan, S.J., - p. 213 - 234.
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