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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    How can Dermanyssus gallinae (De Geer 1778) (Acari_Dermanyssidae) walk upwards on slippery surfaces
    Palma, Antonella Di; Mul, Monique F. - \ 2019
    Avian Pathology 48 (2019)sup1. - ISSN 0307-9457 - p. S10 - S16.
    ambulacrum - claws - functional morphology - leg adaptations - Poultry red mite - pulvillus - scanning electron microscopy

    Scanning electron microscopy observations of the distal leg region of the poultry red mite Dermanyssus gallinae (De Geer 1778) identified the presence of a compound ambulacrum, the part of the leg that contacts the substratum when the mite walks. The ambulacrum is comprised of a praetarsus (the ambulacrum stalk), a pulvillus and two claws. The pulvillus is a weakly sclerotized structure that can be partly expanded or retracted in the praetarsus. When expanded, the pulvillus shows a cushion-like shape which can, as a result of its soft surface, function as a sucker, thus allowing D. gallinae to adhere to a smooth surface. When traversing an irregular surface, or clinging to a soft surface, the mite retracts the pulvillus and uses only its strongly sclerotized movable claws. These observed morphological adaptations explain the ability of D. gallinae to climb upwards on a slippery surface, resist an air flux, walk on smooth and rigid feathers of its avian hosts, and cling to the bird’s or human's soft skin. This knowledge is important to better understand the attachment mechanism of this species to its host and to the substratum on which it moves, and also to provide insight into the circumstances under which it is able to move. RESEARCH HIGHLIGHTS The ambulacrum is the distal part of the leg touching the substratum D. gallinae’s ambulacrum consists of a praetarsus, a pulvillus and two claws The weakly sclerotized pulvillus can be part expanded/retracted in the praetarsus The expanded pulvillus functions as a sucker to adhere to smooth surfaces The claws are used to walk on an irregular surface or cling to a soft surface.

    Dealing with food shortage : larval dispersal behaviour and survival on non-prey food of the hoverfly Episyrphus balteatus
    Vosteen, Ilka ; Gershenzon, Jonathan ; Kunert, Grit - \ 2018
    Ecological Entomology 43 (2018)5. - ISSN 0307-6946 - p. 578 - 590.
    Aphids - hoverflies - non-prey food - predatory larvae - searching behaviour - Syrphidae

    1. Predatory larvae often have to face food shortages during their development, and thus the ability to disperse and find new feeding sites is crucial for survival. However, the dispersal capacity of predatory larvae, the host finding cues employed, and their use of alternative food sources are largely unknown. These aspects of the foraging behaviour of the aphidophagous hoverfly (Episyrphus balteatus De Geer) larvae were investigated in the present study. 2. It was shown that these hoverfly larvae do not leave a plant as long as there are aphids available, but that dispersing larvae are able to find other aphid colonies in the field. Dispersing hoverfly larvae accumulated on large aphid colonies, but did not distinguish between different pea aphid race–plant species combinations. Large aphid colonies might be easier to detect because of intensified searching by hoverfly larvae following the encounter of aphid cues like honeydew that accumulate around large colonies. 3. It was further shown that non-prey food, such as diluted honey or pollen, was insufficient for hoverfly larvae to gain weight, but prolonged the survival of the larvae compared with unfed individuals. As soon as larvae were switched back to an aphid diet, they rapidly gained weight and some pupated after a few days. Although pupation and adult hatching rates were strongly reduced compared with hoverflies continuously fed with aphids, the consumption of non-prey food most probably increases the probability that hoverfly larvae find an aphid colony and complete their development.

    Beyond scarcity perspectives on energy transition
    Geerts, Robert Jan - \ 2018
    Relations 6 (2018)1. - ISSN 2283-3196 - p. 49 - 68.
    Abundance - Energy debates - Energy discourse - Energy ethics - Energy transition - Good life - Prosperity - Quality of life - Scarcity - Simplicity

    Two dominant lines of reasoning in the philosophical debate on energy transition can be described as boundless consumerism (we should find ways to keep growing) and eco-frugality (we should reduce our impact as much as possible). This paper problematizes both approaches via their implicit understanding of the good life, and proposes a third alternative: qualitative abundance. Society is not interested in any sustainable energy system, but in one that caters to our needs and enables us to flourish as human beings. Because the dominant lines in the current debate share a concern for scarcity, they fail to raise the question of a "good" energy system, and therefore the possibility of a positive energy ethics. Qualitative abundance initiates discourse around prosperity (with boundless consumerism) and simplicity (with ecofrugality), thus expanding and enriching debates on energy transition.

    Hoog tijd voor onafhankelijke en objectieve beoordeling van grondwaterinformatie : Weerwoord op de reactie van Frans van Geer op het essay
    Heijkers, W.J.M. ; Knotters, M. - \ 2014
    Stromingen : vakblad voor hydrologen 20 (2014)1. - ISSN 1382-6069 - p. 61 - 63.
    grondwaterstand - monitoring - methodologie - groundwater level - monitoring - methodology
    Het doel van ons essay was om een discussie te starten en bij te dragen aan meningsvorming. De reactie van Frans laat zien dat we daarin zijn geslaagd. Moge er nog vele essays, reacties en discussies volgen. Toch willen we ook graag in dit weerwoord reageren op de inhoudelijke en praktische bezwaren die Frans ziet bij het monitoring-systeem voor validatie van informatie over de grondwaterstand dat wij voorstellen.
    Verjonging van half-natuurlijke kwelders en schorren
    Wesenbeeck, B.K. van; Esselink, P. ; Oost, A.P. ; Duin, W.E. van; Groot, A.V. de; Veeneklaas, R.M. ; Balke, T. ; Geer, P. van; Calderon, A.C. ; Smale, A. - \ 2014
    Driebergen : VBNE (Rapport / VBNE 2014/OBN196-DK) - 77
    vegetatietypen - kweldergronden - natura 2000 - geomorfologie - waterbeheer - ontpoldering - zuidwest-nederland - wadden - vegetation types - salt marsh soils - natura 2000 - geomorphology - water management - depoldering - south-west netherlands - tidal flats
    In dit rapport staan de Nederlandse kwelders en schorren centraal. Nederland heeft een bijzondere verantwoordelijkheid voor handhaving van de kwantiteit en kwaliteit van de drie betreffende habitattypen ‘eenjarige pioniervegetatie van slik- en zandgebieden met Zeekraal (Salicornia spp.) en andere zoutminnende soorten’ (H1310), meerjarige pioniervegetatie met Slijkgrassen (Spartina spp.) (H1320), en Atlantische kwelders en schorren (H1330). Dit rapport beperkt zich tot de vastelandkwelders. Deze kwelders zijn in grote mate menselijk beïnvloed en kunnen daarom het beste als halfnatuurlijk worden omschreven.
    Integraal waterbeheer : kritische zone en onzekerheden : integraal hoofdrapport
    Schipper, P.N.M. ; Bogaart, P.W. ; Groot, A.T. ; Kroes, J.G. ; Mol-Dijkstra, J.P. ; Mulder, H.M. ; Supit, I. ; Verweij, P.J.F.M. ; Walsum, P.E.V. van; Wamelink, G.W.W. ; Baaren, E. van; Ek, R. van; Oude Essink, G. ; Faneca Sanchez, ; Bakker, A. ; Bessembinder, J. ; Janssen, P. ; Geer, M.F. van; Simmelink, E. ; Sluijs, J. van der - \ 2013
    Wageningen : Alterra, Wageningen-UR (Alterra-rapport 2443) - 58
    integraal waterbeheer - bodemwater - ecohydrologie - landbouw - natuur - klimaatverandering - onzekerheid - modelleren - achterhoek - zeeuwse eilanden - integrated water management - soil water - ecohydrology - agriculture - nature - climatic change - uncertainty - modeling - achterhoek - zeeuwse eilanden
    In het kader van het Nationaal Modellen- en Datacentrum (NMDC) is in 2011 het NMDC innovatieproject 'Integraal waterbeheer - van kritische zone tot kritische onzekerheden' gestart ( Dit project heeft tot doel om de modellen voor bodem, water, vegetatie en klimaat(verandering) door samenwerking beter op elkaar aan te laten sluiten, daarbij beter geschikt te maken om effecten van klimaatverandering te berekenen en om de verschillende typen onzekerheden bij dit soort studies in beeld te brengen. Het project is uitgevoerd door Alterra, Deltares, KNMI, PBL en TNO. In twee cases (Baakse Beek en Walcheren) hebben zij hun state-of-the-art modellen voor meteo, gewasgroei, vegetatie-ontwikkeling, hydrologie en geologie ingezet en aan elkaar gekoppeld. Dit rapport behandelt integraal de resultaten van het innovatieproject. De resultaten van de case voor de Baakse Beek zijn specifiek opgenomen in een NMDC deelrapport (Van Ek et al., 2012). Voor de case Walcheren wordt verwezen naar een artikel in voorbereiding (Kroes, J. et al., 2013). De resultaten bieden nieuwe inzichten in de vocht- en zouthuishouding van de bodem, potenties voor grondwaterafhankelijke natuur en groei van landbouwgewassen in het huidige klimaat en projecties voor klimaatverandering rond 2050. In het project zijn verschillende methoden toegepast om inzicht te krijgen in verschillende onzekerheden, hetgeen voor dergelijke integrale (model)studies praktische aanknopingspunten biedt voor de analyse van onzekerheden en effectieve samenwerking tussen de instituten.
    Genetic engineering of plant volatile terpenoids: effects on a herbivore, a predator and a parasitoid
    Kos, M. ; Houshyani Hassanzadeh, B. ; Overeem, A.J. ; Bouwmeester, H.J. ; Weldegergis, B.T. ; Loon, J.J.A. van; Dicke, M. ; Vet, L.E.M. - \ 2013
    Pest Management Science 69 (2013)2. - ISSN 1526-498X - p. 302 - 311.
    arabidopsis-thaliana - natural enemies - tritrophic interactions - tetranychus-urticae - biological-control - transgenic plants - prey interactions - host-plant - aphid - attraction
    BACKGROUND: Most insect-resistant transgenic crops employ toxins to control pests. A novel approach is to enhance the effectiveness of natural enemies by genetic engineering of the biosynthesis of volatile organic compounds (VOCs). Before the commercialisation of such transgenic plants can be pursued, detailed fundamental studies of their effects on herbivores and their natural enemies are necessary. The linalool/nerolidol synthase gene FaNES1 was constitutively expressed from strawberry in three Arabidopsis thaliana accessions, and the behaviour of the aphid Brevicoryne brassicae L., the parasitoid Diaeretiella rapae McIntosh and the predator Episyrphus balteatus de Geer was studied. RESULTS: Transgenic FaNES1-expressing plants emitted (E)-nerolidol and larger amounts of (E)-DMNT and linalool. Brevicoryne brassicae was repelled by the transgenic lines of two of the accessions, whereas its performance was not affected. Diaeretiella rapae preferred aphid-infested transgenic plants over aphid-infested wild-type plants for two of the accessions. In contrast, female E. balteatus predators did not differentiate between aphid-infested transgenic or wild-type plants. CONCLUSION: The results indicate that the genetic engineering of plants to modify their emission of VOCs holds considerable promise for facilitating biological control of herbivores. Validation for crop plants is a necessary next step to assess the usefulness of modified volatile emission in integrated pest management. Copyright (C) 2012 Society of Chemical Industry
    Improving catchment discharge predictions by inferring flow route contributions from a nested-scale monitoring and model setup
    Velde, Y. van der; Rozemeijer, J.C. ; Rooij, G.H. de; Geer, F.C. van; Torfs, P.J.J.F. ; Louw, P.G.B. de - \ 2011
    Hydrology and Earth System Sciences 15 (2011)3. - ISSN 1027-5606 - p. 913 - 930.
    mesoscale catchment - hillslope scale - watershed scale - soil - groundwater - complex - quality - losses - paths - sum
    Identifying effective measures to reduce nutrient loads of headwaters in lowland catchments requires a thorough understanding of flow routes of water and nutrients. In this paper we assess the value of nested-scale discharge and groundwater level measurements for the estimation of flow route volumes and for predictions of catchment discharge. In order to relate field-site measurements to the catchment-scale an upscaling approach is introduced that assumes that scale differences in flow route fluxes originate from differences in the relationship between groundwater storage and the spatial structure of the groundwater table. This relationship is characterized by the Groundwater Depth Distribution (GDD) curve that relates spatial variation in groundwater depths to the average groundwater depth. The GDD-curve was measured for a single field site (0.009 km(2)) and simple process descriptions were applied to relate groundwater levels to flow route discharges. This parsimonious model could accurately describe observed storage, tube drain discharge, overland flow and groundwater flow simultaneously with Nash-Sutcliff coefficients exceeding 0.8. A probabilistic Monte Carlo approach was applied to upscale field-site measurements to catchment scales by inferring scale-specific GDD-curves from the hydrographs of two nested catchments (0.4 and 6.5 km(2)). The estimated contribution of tube drain effluent (a dominant source for nitrates) decreased with increasing scale from 76-79% at the field-site to 34-61% and 25-50% for both catchment scales. These results were validated by demonstrating that a model conditioned on nested-scale measurements improves simulations of nitrate loads and predictions of extreme discharges during validation periods compared to a model that was conditioned on catchment discharge only.
    Dynamics in groundwater and surface water quality : from field-scale processes to catchment-scale models
    Velde, Y. van der - \ 2011
    Wageningen University. Promotor(en): Sjoerd van der Zee; F.C. van Geer, co-promotor(en): G.H. de Rooij. - S.l. : s.n. - ISBN 9789085858249 - 176
    hydrologie - deterministische modellen - hydrologie van stroomgebieden - innovaties - waterkwaliteit - afvoerwater - grondwater - oppervlaktewater - stroomgebieden - waterlopen - observatie - oppervlaktewaterkwaliteit - achterhoek - hydrology - deterministic models - catchment hydrology - innovations - water quality - effluents - groundwater - surface water - watersheds - streams - observation - surface water quality - achterhoek - cum laude
    cum laude graduation (with distinction)
    Direct measurements of the tile drain and groundwater flow route contributions to surface water contamination: from field-scale concentration patterns in groundwater to catchment-scale surface water quality
    Rozemeijer, J.C. ; Velde, Y. van der; Geer, F.C. van; Broers, H.P. ; Bierkens, M.F.P. - \ 2010
    Environmental Pollution 158 (2010)12. - ISSN 0269-7491 - p. 3571 - 3579.
    nitrate concentrations - hydrological pathways - agricultural soils - transport - phosphorus
    Enhanced knowledge of water and solute pathways in catchments would improve the understanding of dynamics in water quality and would support the selection of appropriate water pollution mitigation options. For this study, we physically separated tile drain effluent and groundwater discharge from an agricultural field before it entered a 43.5-m ditch transect. Through continuous discharge measurements and weekly water quality sampling, we directly quantified the flow route contributions to surface water discharge and solute loading. Our multi-scale experimental approach allowed us to relate these measurements to field-scale NO3 concentration patterns in shallow groundwater and to continuous NO3 records at the catchment outlet. Our results show that the tile drains contributed 90–92% of the annual NO3 and heavy metal loads. Considering their crucial role in water and solute transport, enhanced monitoring and modeling of tile drainage are important for adequate water quality management
    Integrated modeling of groundwater–surface water interactions in a tile-drained agricultural field : The importance of directly measured flow route contributions
    Rosemeijer, J.C. ; Velde, Y. van der; McLaren, R.G. ; Geer, F.C. van; Broers, H.P. ; Bierkens, M.F.P. - \ 2010
    Water Resources Research 46 (2010). - ISSN 0043-1397 - 10 p.
    nitrate concentrations - catchment - soil - quality - uncertainty - management - separation - hydrology - discharge - dynamics
    Understanding the dynamics of groundwater–surface water interaction is needed to evaluate and simulate water and solute transport in catchments. However, direct measurements of the contributions of different flow routes from specific surfaces within a catchment toward the surface water are rarely available. For this study, we physically separated the tile drain discharge toward a 43.5 m ditch transect from the groundwater–plus–overland flow routes. Direct groundwater flow and ephemeral overland flow were jointly captured in three sheet pile in-stream reservoirs, while the effluent from three tile drain outlets was collected in vessels. Our flux measurements showed that, in response to a rainfall event, the tile drain contribution to the total ditch discharge decreased from 80% to 28%. We used these flow route measurements to calibrate a field-scale integrated water transport model. The HydroGeoSphere code was used because it simultaneously solves the flow regimes in the variably saturated domain, the tile drain domain, and the surface flow domain. This simultaneous solution is needed for a correct representation of the mutual interactions between groundwater flow, tile drain flow, and ditch water flow. Our model produced a flow distribution between the flow paths which deviated only 2% from the measured flow distribution. A sensitivity analysis showed that model parameters related to tile drain entrance resistance and to the resistance to water flow through the surface water system controlled the water flow route distribution but with little effect on groundwater levels. This indicates that a model calibration based on groundwater levels alone does not necessarily produce a correct representation of the flow route contributions.
    Application and evaluation of a new passive sampler for measuring average solute concentrations in a catchment-scale water quality monitoring study
    Rozemeijer, J.C. ; Velde, Y. van der; Jonge, H. de; Geer, F.C. van; Broers, H.P. ; Bierkens, M.F.P. - \ 2010
    Environmental Science and Technology 44 (2010)4. - ISSN 0013-936X - p. 1353 - 1359.
    aromatic-hydrocarbons pahs - membrane devices spmds - groundwater - loads - contaminants - pollutants
    We present a field based testing, optimization, and evaluation study of the SorbiCell sampler (SC-sampler); a new passive sampling technique that measures average concentrations over longer periods of time (days to months) for various substances. We tested the SC-sampler within a catchment-scale monitoring study of NO(3) and P concentrations in surface water and tile drain effluent. Based on our field experiences, we optimized the flow velocity control and the sample volume capacity of the SC-samplers. The SC-samplers were capable of reproducing the NO(3) concentration levels and the seasonal patterns that were observed with weekly conventional grab sampling and continuous water quality measurements. Furthermore, we demonstrated that average measurements produce more consistent load estimates than "snapshot" concentrations from grab sampling. Therefore, when the purpose of a monitoring program is to estimate reliable (trends in) average concentrations or loads, the SC-samplers are a cost-effective alternative for grab sampling
    Improving load estimates for NO3 and P in surface waters by characterizing the concentration response to rainfall events
    Rozemeijer, J.C. ; Velde, Y. van der; Geer, F.C. van; Rooij, G.H. de; Torfs, P.J.J.F. ; Broers, H.P. - \ 2010
    Environmental Science and Technology 44 (2010)16. - ISSN 0013-936X - p. 6305 - 6312.
    field-scale - land-use - phosphorus - catchments - dynamics - management - separation - frequency - transport - nutrient
    For the evaluation of action programs to reduce surface water pollution, water authorities invest heavily in water quality monitoring. However, sampling frequencies are generally insufficient to capture the dynamical behavior of solute concentrations. For this study, we used on-site equipment that performed semicontinuous (15 min interval) NO3 and P concentration measurements from June 2007 to July 2008. We recorded the concentration responses to rainfall events with a wide range in antecedent conditions and rainfall durations and intensities. Through sequential linear multiple regression analysis, we successfully related the NO3 and P event responses to high-frequency records of precipitation, discharge, and groundwater levels. We applied the regression models to reconstruct concentration patterns between low-frequency water quality measurements. This new approach significantly improved load estimates from a 20% to a 1% bias for NO3 and from a 63% to a 5% bias for P. These results demonstrate the value of commonly available precipitation, discharge, and groundwater level data for the interpretation of water quality measurements. Improving load estimates from low-frequency concentration data just requires a period of high-frequency concentration measurements and a conceptual, statistical, or physical model for relating the rainfall event response of solute concentrations to quantitative hydrological changes
    The nitrate response of a lowland catchment: on the relation between stream concentration and travel time distribution dynamics
    Velde, Y. van der; Rooij, G.H. de; Rozemeijer, J.C. ; Geer, F.C. van; Broers, H.P. - \ 2010
    Water Resources Research 46 (2010). - ISSN 0043-1397 - 17 p.
    nitrogen mineralization - grassland soils - organic-matter - groundwater - transport - scale - model - texture - uncertainty - netherlands
    Nitrate pollution of surface waters is widespread in lowland catchments with intensive agriculture. For identification of effective nitrate concentration reducing measures the nitrate fluxes within catchments need to be quantified. In this paper we applied a mass transfer function approach to simulate catchment-scale nitrate transport. This approach was extended with time-varying travel time distributions and removal of nitrate along flow paths by denitrification to be applicable for lowland catchments. Numerical particle tracking simulations revealed that transient travel time distributions are highly irregular and rapidly changing, reflecting the dynamics of rainfall and evapotranspiration. The solute transport model was able to describe 26 years of frequently measured chloride and nitrate concentrations in the Hupsel Brook catchment (6.6 km2 lowland catchment in the Netherlands) with an R2 value of 0.86. Most of the seasonal and daily variations in concentrations could be attributed to temporal changes of the travel time distributions. A full sensitivity analysis revealed that measurements other than just surface water nitrate and chloride concentrations are needed to constrain the uncertainty in denitrification, plant uptake, and mineralization of organic matter. Despite this large uncertainty, our results revealed that denitrification removes more nitrate from the Hupsel Brook catchment than stream discharge. This study demonstrates that a catchment-scale lumped approach to model chloride and nitrate transport processes suffices to accurately capture the dynamics of catchment-scale surface water concentration as long as the model includes detailed transient travel time distributions
    Field-Scale Measurements for Separation of Catchment Discharge into Flow Route Contributions
    Velde, Y. van der; Rozemeijer, J. ; Rooij, G.H. de; Geer, F.C. van; Broers, H.P. - \ 2010
    Vadose Zone Journal 9 (2010)1. - ISSN 1539-1663 - p. 25 - 35.
    hydrological pathways - preferential flow - surface-water - land-use - nitrate - soil - groundwater - dynamics - agriculture - uncertainty
    Agricultural pollutants in catchments are transported toward the discharging stream through various flow routes such as tube drain flow, groundwater flow, interflow, and overland flow. Direct measurements of flow route contributions are difficult and often impossible. We developed a field-scale setup that can measure the contribution of the tube drain flow route to the total discharge toward the surface water system. We then embedded these field-scale measurements in a nested measurement setup to asses the value of field-scale measurements for interpretation of catchment-scale discharge and nitrate concentrations using a linear flow route mixing model. In a lowland catchment, we physically separated the tube drain effluent from the discharge of all other flow routes. Upscaling the field-scale flow route discharge contributions to the subcatchment and the catchment scale with a linear flow route mixing model gave a good prediction of the catchment discharge. Catchment-scale nitrate concentrations were simulated well for a heavy rainfall event but poorly for a small rainfall event. The nested measurement setup revealed that the fluxes at a single field site cannot be representative for the entire catchment at all times. However, the distinctly different hydrograph reaction of the individual flow routes on rainfall events at the field site made it possible to interpret the catchment-scale hydrograph and nitrate concentrations. This study showed that physical separation of flow route contributions at the field scale is feasible and essential for understanding catchment-scale discharge generation and solute transport processes
    Effects of landscape structure on movement patterns of the flightless bush cricket Pholidoptera griseoaptera
    Diekötter, T. ; Speelmans, M. ; Dusoulier, F. ; Wingerden, W.K.R.E. van; Malfait, J.P. ; Crist, T.O. ; Edwards, P.J. ; Dietz, H. - \ 2007
    Environmental Entomology 36 (2007)1. - ISSN 0046-225X - p. 90 - 98.
    metrioptera-roeseli - orthoptera-tettigoniidae - metapopulation dynamics - decticus-verrucivorus - range expansion - dispersal - habitat - ecology - corridors - matrix
    Because the viability of a population may depend on whether individuals can disperse, it is important for conservation planning to understand how landscape structure affects movement behavior. Some species occur in a wide range of landscapes differing greatly in structure, and the question arises of whether these species are particularly versatile in their dispersal or whether they are composed of genetically distinct populations adapted to contrasting landscapes. We performed a capture-mark-resight experiment to study movement patterns of the flightless bush cricket Pholidoptera griseoaptera (De Geer 1773) in two contrasting agricultural landscapes in France and Switzerland. The mean daily movement of P. griseoaptera was significantly higher in the landscape with patchily distributed habitat (Switzerland) than in the landscape with greater habitat connectivity (France). Net displacement rate did not differ between the two landscapes, which we attributed to the presence of more linear elements in the connected landscape, resulting in a more directed pattern of movement by P. griseoaptera. Significant differences in the movement patterns between landscapes with contrasting structure suggest important effects of landscape structure on movement and dispersal success. The possibility of varying dispersal ability within the same species needs to be studied in more detail because this may provide important information for sustainable landscape planning aimed at maintaining viable metapopulations, especially in formerly well-connected landscapes.
    Improving the quality of model-based decision support: good modelling practice in water management
    Scholten, H. ; Waveren, R.H. van; Groot, S. ; Geer, F.C. van; Wösten, J.H.M. ; Koeze, R.D. ; Noort, J.J. - \ 2001
    In: Regional management of water resources. Wallingford (UK), IAHS, 2001. IAHS Publ. 268 / Schumann, A.H., Acreman, M.C., Davis, R., Marino, M.A., Rosbjerg, D., Jun, Xia, - p. 223 - 230.
    hydrologie - kwaliteit - simulatiemodel - waterbeheer
    Improving the quality of model based decision support: Good Modelling Practice in water management.
    Scholten, H. ; Waveren, R.H. van; Groot, S. ; Geer, F. van; Wösten, J.H.M. ; Koeze, R.D. ; Noort, J.J. - \ 2001
    In: Regional Management of Water Resources: Symposium S2 of the 6th Scientific Assembly of the International Association of Hydrological Sciences, Maastricht, 2001 Maastricht, The Netherlands : IAHS - p. 18 - 27.
    Towards a well-oiled model infrastructure for water management: the generic framework water program
    Blind, M.W. ; Ubbels, A. ; Wentholt, L.R. ; Stijn, T.L. van; Bakema, A.H. ; Bulens, J.D. ; Noort, J.J. ; Adrichem, B. van; Stout, J. ; Geer, F.C. van - \ 2000
    In: Generic framework water program & related projects in the Netherlands; papers presented at the Hydroinformatics 2000 conference, July 22-27, Cedar Rapids, IA, USA. S.l., s.n., 2000. RIZA Work. Paper 2000.039X / STOWA Work. Paper 2000-W-01 / RIKZ Work. Paper RIKZ/OS/2000.110X - p. 1 - 8.
    Good modelling practice in water management
    Scholten, H. ; Waveren, R.H. van; Groot, S. ; Geer, F.C. van; Wösten, J.H.M. ; Koezee, R.D. ; Noort, J.J. - \ 2000
    In: Generic framework water program & related projects in the Netherlands; papers presented at the Hydroinformatics 2000 conference, July 22-27, Cedar Rapids, IA, USA. S.l., s.n., 2000. RIZA Work. Paper 2000.039X / STOWA Work. Paper 2000-W-01 / RIKZ Work. Paper RIKZ/OS/2000.110X - p. 21 - 28.
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