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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    Crop Wild Relatives (CWRs) in Nederland
    Hoekstra, R. ; Treuren, R. van; Hintum, T.J.L. van - \ 2016
    wilde verwanten - genetische bronnen van plantensoorten - conservering - ex-situ conservering - in-situ conservering - natuurgebieden - genenbanken - nederland - wild relatives - plant genetic resources - conservation - ex situ conservation - in situ conservation - natural areas - gene banks - netherlands
    http://www.cwrnl.nl
    Pilot inkuilen Grote waternavel ten behoeve van veevoeding
    Hoving, I.E. ; Schooten, H.A. van - \ 2015
    Wageningen : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 853) - 26
    veevoeding - varkensvoeding - conservering - varkens - voeropname - voedingswaarde - kuilvoer - hydrocotyle - kuilvoerbereiding - ingekuilde planten - livestock feeding - pig feeding - conservation - pigs - feed intake - nutritive value - silage - hydrocotyle - silage making - silage plants
    This report describes the results of a practical ensiling experiment with Greater water pennywort, in which the processing of the plant material and the effect of drying on the ensiling result and nutrition value has been investigated. The conservation of the ensiled product was very poor (even after drying) due to the high water content, low sugar content and soil contamination. The intake of the wet product by pigs seem to be good. The poor preservation proved no obstacle. Greater water pennywort has potential as fodder for pigs given the nutritional and good intake. What is needed are methods to harvest cleaner and to ferment the product better.
    Winning en cryoconservering van sperma van zeldzame Nederlandse konijnenrassen voor de genenbank
    Hoving-Bolink, A.H. ; Wit, A.A.C. de; Sulkers, H. ; Zuidberg, C.A. ; Hulsegge, B. ; Woelders, H. ; Hiemstra, S.J. - \ 2014
    Wageningen : Centrum voor Genetische Bronnen Wageningen UR (CGN rapport 32) - 37
    rapporten - konijnen - rassen (dieren) - conservering - kunstmatige inseminatie - ingevroren sperma - sperma - genenbanken - zeldzame rassen - reports - rabbits - breeds - conservation - artificial insemination - frozen semen - semen - gene banks - rare breeds
    In dit rapport wordt beschreven welke activiteiten CGN in samenwerking met de SZH, KLN en individuele fokkers hebben ondernomen om genetisch materiaal van konijnenrassen veilig te stellen in de genenbank. Op basis van literatuur en praktijkervaringen is een protocol voor spermawinning en spermaverwerking (cryoconservering) vastgesteld. Een dergelijk protocol was niet beschikbaar in de Nederlandse bedrijfsmatige konijnenhouderij omdat daar uitsluitend met vers sperma gewerkt wordt en niet met ingevroren sperma. Het rapport eindigt met een beschrijving van de resultaten van de spermawinning.
    Conservation and sustainable use of Animal Genetic Resources for Food and Agriculture : country report of the Netherlands for the 2nd State of the World’s Animal Genetic Resources for Food and Agriculture : executive summary
    Hiemstra, S.J. ; Hoving, A.H. ; Oldenbroek, J.K. - \ 2014
    Wageningen/The Hague : CGN&Ministry of Economic Affairs (CGN report 31) - 25
    genetische bronnen van diersoorten - genetische diversiteit - landbouwbeleid - conservering - duurzaamheid (sustainability) - voedselveiligheid - landbouw - nederland - specialisatie - technologie - bedrijfsgrootte in de landbouw - animal genetic resources - genetic diversity - agricultural policy - conservation - sustainability - food safety - agriculture - netherlands - specialization - technology - farm size
    The updated Dutch national report on conservation and sustainable use of Animal Genetic Resources summarizes the state of national implementation of the Global Plan of Action for Animal Genetic Resources. Seven strategic priority areas have been identified, dealing with remaining or future challenges. At national level conservation strategies will be strengthened to halt the loss of farm animal genetic diversity and to protect our bio-cultural heritage. New technologies will be adopted and further developed for characterization, conservation and breeding purposes. The Netherlands will contribute to the global agenda by generating knowledge and development of improved breeding material for sustainable development of the livestock sector and future food security.
    Conserving the genetic diversity of Bolivian wild potatoes
    Cadima Fuentes, X. - \ 2014
    Wageningen University. Promotor(en): Marc Sosef, co-promotor(en): Ronald van den Berg; Rob van Treuren. - Wageningen : Wageningen University - ISBN 9789462571686 - 229
    solanum - bolivia - wilde verwanten - gewassen - genetische bronnen van plantensoorten - conservering - ex-situ conservering - in-situ conservering - genenbanken - biosystematiek - genetische diversiteit - verzamelmissies - solanum - bolivia - wild relatives - crops - plant genetic resources - conservation - ex situ conservation - in situ conservation - gene banks - biosystematics - genetic diversity - collecting missions

    Abstract thesis Ximena Cadima Fuentes (to be defended on 8 Dec 2014):

    Conserving the genetic diversity of Bolivian wild potatoes

    The wild relatives of potatoes (Solanum sect. Petota) form the genetic reservoir for the improvement of the cultivated potato. Bolivia harbours 39 wild taxa of these wild potatoes, 21 of which are endemic species. This study aimed to evaluate to what level the current ex situ and in situ management efforts have conserved the genetic diversity of Bolivian wild potato species, and what recommendations can be formulated for improvement.

    The current conservation status of Bolivian endemic wild potato species was assessed using both the globally accepted IUCN criteria and a methodology developed within the framework of the UNEP/GEF-Crop Wild Relative Project (CWR Project). These two methods led to different estimates of threat status for some of the species. Spatial analysis allowed to distinguish eight priority areas for in situ conservation of the 21 Bolivian endemic wild potato species. These areas represent a high concentration of endemic species and have a relatively low level of threat, but only one of them has a conservation status. This is a first step to direct the conservation efforts for wild potato species.

    The genetic stability and diversity of material from different species under ex situ management was evaluated using microsatellite markers. The analysis was performed on accessions that went through a process of seed regeneration and multiplication during ex situ conservation. Genetic changes between different generations of ex situ germplasm were observed for the majority, but not all, of the investigated species. Potential causes of these changes include genetic drift and contamination resulting from human error during regeneration. The populations generated under ex situ conditions were also compared with re-collected in situ populations from the same location or area as the original collection. The results showed highly significant differences in all cases. Potential causes for these differences are changes during ex situ maintenance, sampling effects during collecting and in situ genetic change over time.

    The integrated conservation of Bolivian wild potatoes requires a combination of in situ and ex situ activities. The principle recommendation for the in situ conservation is to move from a passive to an active approach, where conservation areas are prioritized, conservation plans are designed according to the type of area (protected area or agro-ecosystem) and local stake holders are involved. To make sure that ex situ material provides a good representation of the in situ genetic variability, regular re-collecting of species with few accessions (and therefore less variability), endangered in situ, and with known or potential favorable traits is necessary. Gene bank management procedures should follow the FAO gene bank standards and this should be monitored by a national body responsible for genetic resources. And finally, periodic monitoring of the genetic integrity should be implemented as part of good practices during regeneration procedures in order to detect possible changes and to help combat human errors.

    Las concesiones forestales comunitaris de Guatemala: de territorios en disputa a territorialidades ensambladas
    Reyes, E.V. - \ 2014
    Wageningen University. Promotor(en): Georg Frerks, co-promotor(en): Alberto Arce. - Wageningen : Wageningen University - ISBN 9789461738486 - 221
    bosbouw - plattelandsontwikkeling - regionale planning - sociale structuur - conservering - concessies - sociale factoren - forestry - rural development - regional planning - social structure - conservation - concessions - social factors
    Does tenure security matter? : rural household responses to land tenure reforms in northwest China
    Ma Xian lei, Xianlei - \ 2013
    Wageningen University. Promotor(en): Ekko van Ierland; X. Shi; Nico Heerink; Justus Wesseler. - Wageningen : Wageningen UR - ISBN 9789461737632 - 195
    agrarische economie - pachtstelsel - platteland - landbouwhuishoudens - landhervorming - grondeigendom - particuliere investering - eigendomsrechten - ruraal-urbane migratie - grondproductiviteit - conservering - china - noordwestelijk china - agricultural economics - tenure systems - rural areas - agricultural households - land reform - land ownership - private investment - property rights - rural urban migration - land productivity - conservation - china - north western china
    Het hoofddoel van China’s landbouw- en plattelandsbeleid is behoud van voedselzekerheid in eigen land en bijdragen aan de voedselzekerheid in de wereld door duurzaam gebruik van natuurlijke hulpbronnen en verbetering van de landbouwproductiecapaciteit voor de lange termijn. In veel gebieden in China gaat de landbouwproductiecapaciteit op lange termijn echter achteruit door intensieve landbouw en de daarmee gepaard gaande degradatie van de hulpbronnen land en water. Het systeem van grondeigendom speelt, als fundamentele institutie die het gedrag van grondbezitters aanstuurt, een zeer belangrijke rol bij de landbouwproductie alsook bij het gebruik van natuurlijke hulpbronnen, en heeft veel belangstelling genoten van onderzoekers in China en andere regio’s in de wereld. Sinds 1998 heeft de Chinese regering een reeks marktgeoriënteerde hervormingen in het grondeigendom ingevoerd die als doel hebben de eigendomszekerheid te verbeteren en de overdraagbaarheid van rurale grond te bevorderen. Relevante wetten behelzen de Wet Grondbeheer (Land Administration Law) uit 1998, de Wet Contracten Rurale Grond (Rural Land Contract Law) uit 2002, de Eigendomswet (Property Law) uit 2007, en de Wet Mediation en Arbitrage bij Geschillen inzake Contracten Rurale Grond (Mediation and Arbitration of Rural Land Contract Disputes Law) uit 2009. Ofschoon deze hervormingen bijgedragen hebben aan een verbeterde formele eigendomszekerheid, is het niet duidelijk in welke mate ze bijdragen aan landbouwproductie en duurzaam gebruik van de grond. In deze studie worden systematisch de relaties onderzocht tussen grondeigendomszekerheid, zoals die wordt beïnvloed door de recente marktgeoriënteerde eigendomshervormingen, en de landbouwproductie in China. Op basis van de bestaande literatuur worden er vier relaties onderzocht, namelijk de relaties tussen eigendomszekerheid en, respectievelijk, grondinvesteringen, marktontwikkelingen betreffende grondpacht, ruraal-urbane migratie, en landbouwproductiviteit en technische efficiëntie. De resultaten van de studie beogen een volledig beeld te verschaffen van de belangrijkste relaties tussen grondeigendomszekerheid, beslissingen op het niveau van huishoudingen, en de landbouwproductiviteit in China. Naar verwachting zullen de verkregen inzichten relevant zijn voor de voortgaande hervormingen van het rurale grondeigendomsysteem en voor gerelateerd landbouw- en plattelandsbeleid in China. Ze zouden tevens van nut kunnen blijken voor andere ontwikkelingslanden met vergelijkbare eigendomsystemen die als doel hebben om huishoudens op het platteland te voorzien van gewaarborgde formele landgebruiksrechten voor de lange termijn.
    In vivo conservation of animal genetic resources
    Boettcher, P. ; Martin, J.F. ; Gandini, G. ; Joshi, B.K. ; Oldenbroek, J.K. - \ 2013
    Rome : FAO (FAO animal production and health guidelines 14) - ISBN 9789251077252 - 242
    genetische bronnen van diersoorten - conservering - dierlijke productie - zeldzame rassen - richtlijnen (guidelines) - handboeken - animal genetic resources - conservation - animal production - rare breeds - guidelines - handbooks
    These guidelines present the basic concepts involved in the development and implementation of in vivo conservation plans for animal genetic resources for food and agriculture. The guidelines are intended for use by policy-makers in the management of animal genetic resources, managers of animal breeding organizations, persons responsible for training in management of animal genetic resources and any other stakeholders with leading roles in designing and implementing in vivo conservation programmes for animal genetic resources. Although individual breeders and livestock keepers are not the direct target audience, the guidelines include background information that is relevant for all stakeholders involved in planning conservation programmes.
    Use of SNP markers to conserve genome-wide genetic diversity in livestock
    Engelsma, K.A. - \ 2012
    Wageningen University. Promotor(en): Johan van Arendonk, co-promotor(en): Jack Windig. - S.l. : s.n. - ISBN 9789461733863 - 178
    dierveredeling - rundvee - single nucleotide polymorphism - genetische diversiteit - genomen - genomica - conservering - animal breeding - cattle - single nucleotide polymorphism - genetic diversity - genomes - genomics - conservation

    Conservation of genetic diversity in livestock breeds is important since it is, both within and between breeds, under threat. The availability of large numbers of SNP markers has resulted in new opportunities to estimate genetic diversity in more detail, and to improve prioritization of animals for conservation of genetic diversity. The aim of this thesis was to further explore the potential of SNP markers for estimation and conservation of genetic diversity within livestock breeds. This was evaluated analyzing Holstein cattle populations, genotyped with a commonly used 50k SNP chip. Genetic diversity was estimated with SNP markers and compared to genetic diversity estimated with pedigree information. Both methods could detect differences in overall genetic diversity, even between two closely related populations. With SNP markers, differences in genetic diversity at the chromosomal level could be identified as well. Subsequently, SNP markers and pedigree information were used to prioritize animals for conservation in a gene bank using optimal contributions. SNP based prioritization was slightly more effective than pedigree based information, both over the whole genome and at specific regions of the genome. We extended the optimal contribution method to simultaneously conserve a single allele at a specific frequency and maximize the overall genetic diversity conserved in a gene bank. The loss of overall genetic diversity was larger when the target frequency for animals conserved in the gene bank differed more from the original frequency in the population. It can be concluded that dense SNP data form a powerful tool for estimation and conservation of genetic diversity in livestock breeds. Although pedigree information gives a good representation of the overall genetic diversity, SNP markers can provide more detailed information about the genetic diversity over the genome. Especially for small populations, SNP markers can play an important role in conservation of unique alleles, while simultaneously minimizing the loss of genetic diversity at the rest of the genome.

    Farm seed opportunities : conservation, breeding and production
    Kik, C. ; Louwaars, N.P. ; Burg, W.J. van der; Almekinders, C.J.M. - \ 2011
    Wageningen : Wageningen UR, Centre for Genetic Resources - 25
    genetische bronnen van plantensoorten - zaadproductie - vermeerderingsmateriaal - plantenveredeling - genetische diversiteit - conservering - in-situ conservering - plant genetic resources - seed production - propagation materials - plant breeding - genetic diversity - conservation - in situ conservation
    Farm Seed Opportunities (FSO), a research project in the FP6 European Research Framework (2007-2009), was targeted to support the implementation of seed regulations on conservation varieties (directive 98/95/EC and new directives 2008/62/EC and 2009/145/CE) and to propose complementary seed regulation scenarios taking into account the diversity of the European seed systems. The FSO project is a collaborative effort of farmers and scientists from France, Italy, the Netherlands, Spain, Switzerland and the United Kingdom. This publication highlights the main FSO conclusions and presents FSO policy recommendations.
    Eureca onderzoek naar consument
    Hoving, A.H. ; Haas, Y. de; Groot, L. de - \ 2011
    De Blaarkopper 2011 (2011)1. - p. 23 - 23.
    groninger blaarkop - melkveerassen - conservering - maatschappelijk draagvlak - vragenlijsten - inheems vee - groningen white headed - dairy breeds - conservation - public support - questionnaires - native livestock
    In het kader van het vervolg van het Eurecaproject werd door CGN/WUR een onderzoek gedaan naar 'Wat is een lokaal runderras de burger waard?'. In dit artikel staat het verslag.
    Does international sustainability certification support regional biodiversity conservation objectives? : the case of rooibos production and Fynbos conservation in South-Africa
    Waarts, Y.R. ; Kuit, M. - \ 2010
    Wageningen : Wageningen UR (Market, chains and sustainable development strategy & policy paper 21) - ISBN 9789461734747 - 14
    biodiversiteit - certificering - natuurbescherming - conservering - duurzaamheid (sustainability) - fijnbos (zuid afrika) - zuid-afrika - afrika - ontwikkelingsbeleid - beleid - milieu - biodiversity - certification - nature conservation - conservation - sustainability - fynbos - south africa - africa - development policy - policy - environment
    Perspectives of genomics for genetic conservation of livestock
    Windig, J.J. ; Engelsma, K.A. - \ 2010
    Conservation Genetics 11 (2010)2. - ISSN 1566-0621 - p. 635 - 641.
    conservering - genetica - vee - genetische bronnen - genetische bronnen van diersoorten - rassen (dieren) - genexpressieanalyse - conservation - genetics - livestock - genetic resources - animal genetic resources - breeds - genomics - linkage disequilibrium - cattle breeds - selection - diversity - populations - sheep - reduction - programs - animals - angus
    Genomics provides new opportunities for conservation genetics. Conservation genetics in livestock is based on estimating diversity by pedigree relatedness and managing diversity by choosing those animals that maximize genetic diversity. Animals can be chosen as parents for the next generation, as donors of material to a gene bank, or as breeds for targeting conservation efforts. Genomics provides opportunities to estimate diversity for specific parts of the genome, such as neutral and adaptive diversity and genetic diversity underlying specific traits. This enables us to choose candidates for conservation based on specific genetic diversity (e.g. diversity of traits or adaptive diversity) or to monitor the loss of diversity without conservation. In wild animals direct genetic management, by choosing candidates for conservation as in livestock, is generally not practiced. With dense marker maps opportunities exist for monitoring relatedness and genetic diversity in wild populations, thus enabling a more active management of diversity.
    Report of a Vegetables Network : Second Meeting, 26–28 June 2007, Olomouc, Czech Republic
    Astley, D. ; Bas, N. ; Branca, F. ; Daunay, M.C. ; Keller, J. ; Dooijeweert, W. van; Treuren, R. van; Maggioni, L. ; Lipman, E. - \ 2009
    Olomouc, Czech Republic : Bioversity International
    genetische bronnen van plantensoorten - groenten - genenbanken - europa - databanken - conservering - plant genetic resources - vegetables - gene banks - europe - databases - conservation
    The Second Meeting of the Vegetables Network (VEGNET) of the European Cooperative Programme for Plant Genetic Resources (ECPGR) was held on 26-28 June 2007 in Olomouc, Czech Republic. The meeting was organized jointly with the Third Meeting of the ECPGR Working Group on Medicinal and Aromatic Plants (MAP WG), which had been formally included in the VEGNET from January 2004 to September 2006. The local organization of the meetings was arranged by the Crop Research Institute, Prague-Ruzyne, Division of Plant Genetics, Breeding and Product Quality, and its local Department of Vegetables and Special Crops in Olomouc. The first introductory session was attended jointly by the VEGNET and MAP Working Groups.
    Breeding initiatives of seeds of landraces, amateur varieties and conservation varieties : an inventory and case studies
    Osman, A.M. ; Chable, V. - \ 2009
    Driebergen [etc.] : Louis Bolk Instituut [etc.] - 35 p.
    plantenveredeling - landrassen - conservering - veredelingsmethoden - plantenvermeerdering - plant breeding - landraces - conservation - breeding methods - propagation
    One of the objectives of the Farm Seed Opportunities (FSO) project is to develop on farm breeding methodologies for the conservation and development of landraces, amateur and conservation varieties. The starting point for the development of these methodologies are the already existing experiences of farmers, small scale seed producers and researchers. To be able to draw on the expertise of these practitioners, we have selected five breeding initiatives for in depth case-studies. Prior to the selection of the five cases we carried out an inventory of all known initiatives within the European Economic Area. Results are presented in this report
    Restoration of degraded steppe lands : opportunities for Lugansk Oblast, Eastern Ukraine
    Sluis, T. van der; Gosselink, J.M.J. ; Slim, P.A. ; Verhagen, J. ; Keulen, H. van - \ 2009
    Wageningen : Alterra (Alterra-rapport 1935) - 59
    landgebruik - landgebruiksplanning - duurzaamheid (sustainability) - biodiversiteit - bedrijfssystemen - conservering - dierlijke productie - grondproductiviteit - steppen - steppegronden - oekraïne - agrobiodiversiteit - duurzaam bodemgebruik - agro-ecologie - ecologische hoofdstructuur - begrazingsbeheer - ecologisch herstel - land use - land use planning - sustainability - biodiversity - farming systems - conservation - animal production - land productivity - steppes - steppe soils - ukraine - agro-biodiversity - sustainable land use - agroecology - ecological network - grazing management - ecological restoration
    There are millions of hectares of land in the Ukraine which either have been abandoned, or are farmed with a low land productivity due to severe land degradation. The Netherlands Embassy has requested a study to assess the opportunities and benefits of restoration of degraded steppe areas. The goal of this project is the restoration of degraded land and to develop more sustainable land use with a higher biodiversity. Innovative farming systems are proposed which are both economically and environmentally sustainable agricultural production systems. This wil improve the livelihood of farmers and lead to higher biodiversity.
    An Atlas of Wader Populations in Africa and Western Eurasia
    Delany, S. ; Scott, D. ; Helmink, A.T.F. ; Dodman, T. ; Flink, S. ; Stroud, D. ; Haanstra, L. - \ 2009
    London : Wetlands International - ISBN 9789058820471 - 524
    populatie-ecologie - conservering - zoögeografie - afrika - europa - waadvogels - vogeltrek - population ecology - conservation - zoogeography - africa - europe - waders - bird migration
    This publication is a compilation of current knowledge of the numbers, distribution and movements of one of the most remarkable groups of birds in the region covered by the African-Eurasian Migratory Waterbird Agreement (AEWA). Long-term waterbird count data have been combined with an extensive literature review, especially published results of bird ringing and national bird atlases, to produce maps showing the population boundaries that are used as a basis of the conservation of these species. The maps are supported by informative species accounts that highlight the movements, population status and conservation of waders in the AEWA region.
    Cryoconservering van runderrassen in Nederland
    Woelders, H. ; Hulsegge, B. ; Sulkers, H. ; Hoving, A.H. ; Hiemstra, S.J. - \ 2009
    Wageningen : Wageningen UR
    rundvee - rundveehouderij - rundveerassen - rassen (dieren) - dierveredeling - conservering - kunstmatige inseminatie - zeldzame rassen - cattle - cattle husbandry - cattle breeds - breeds - animal breeding - conservation - artificial insemination - rare breeds
    In deze brochure wordt ingegaan op de rol van cryoconservering (genenbank en routinematige KI) bij de instandhouding van de streekgebonden Nederlandse rassen: Brandrode Rund, Fries Hollands, Fries Roodbont, Groninger Blaarkop, Lakenvelder, Maas-Rijn-IJssel, Verbeterd Roodbont Vleesras en Witrik
    Erfgoed en ruimtelijke planning; Sterft, gij oude vormen en gedachten!
    Zande, A.N. van der; During, R. - \ 2009
    Den Haag : Sdu uitgevers (Reeks planologie 12) - ISBN 9789012131995 - 397
    regionale planning - cultureel erfgoed - erfgoed - conservering - beschermingsgebieden - archeologie - oude monumenten - historische plaatsen - geschiedenis - nederland - cultuurgeschiedenis - regional planning - cultural heritage - heritage areas - conservation - conservation areas - archaeology - ancient monuments - historic sites - history - netherlands - cultural history
    De uitgave Erfgoed en ruimtelijke planning plaatst de relatie erfgoed en ruimtelijke planning in een historisch, wetenschappelijk en praktijkgericht perspectief. Publieke emoties lijken vaak belangrijker dan beredeneerde afwegingen bij het behoud van cultureel erfgoed in ons land. Het zijn zelden rationele beslissingen die leiden tot het behoud of juist verloren gaan ervan. Planologen verschuilen zich nog maar al te vaak achter procedures, projectontwikkelaars achter geld en overheden achter wetten en regelgeving. "Erfgoed is echter een maatschappelijk zaak en de professionals in de wereld van de ruimtelijke ordening zullen zich daarvan veel meer rekenschap moeten geven," zo blijkt uit het boek 'Erfgoed en Ruimtelijke Planning'.
    Arthropods in linear elements : occurence, behaviour and conservation management
    Noordijk, J. - \ 2009
    Wageningen University. Promotor(en): Karle Sykora, co-promotor(en): Andre Schaffers. - [S.l. : S.n. - ISBN 9789085854920 - 188
    geleedpotigen - wegbermen - vegetatiebeheer - maaien - coleoptera - araneae - insecten - nederland - conservering - landschapselementen - veluwe - arthropods - roadsides - vegetation management - mowing - coleoptera - araneae - insects - netherlands - conservation - landscape elements - veluwe
    Soortenrijke graslanden zijn zeldzaam geworden in Nederland en wegbermen vormen belangrijke wijkplaatsen voor dit biotoop. Om de soortenrijkdom in graslanden in stand te houden moeten ze gemaaid worden, gebeurt dit niet dan verruigt de vegetatie; een proces dat door atmosferische stikstofdepositie aanzienlijk wordt versneld. Dit onderzoek geeft resultaten van twee experimenten in grazige bermen. In een periode van vijf jaar werd met bodemvallen het effect van vijf maairegimes onderzocht op de aanwezigheid van loopkevers, snuitkevers, mieren en grondbewondende spinnen. Uitgaande van gangbare vormen van bermbeheer en verwaarlozing. Het tweede experiment betrof een middel-productieve berm; hier werd het effect van de verschillende beheerstypen op bloembezoekende insecten bestudeerd
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