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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    Van proefschrift naar varkenstoilet
    Sikkema, Albert ; Smolders, Mart - \ 2012
    pig farming - innovations - animal welfare - pig housing - pigs - manure fermentation - pilot farms - animal production
    De stad heeft honger
    Mansfeld, Madeleine van - \ 2012
    urban areas - urban society - sustainable development - agroindustrial complexes - food production - food supply
    Onderzoek naar een ander klimaat (interview met Leen Moraal)
    Didden, R. ; Moraal, L.G. - \ 2009
    Wageningen Update 1 (2009)09. - ISSN 1569-3279 - p. 18 - 18.
    Can differences in soil community composition after peat meadow restoration lead to different decomposition and mineralization rates?
    Dijk, J. van; Didden, W.A.M. ; Kuenen, F. ; Bodegom, P.M. van; Verhoef, H.A. ; Aerts, R. - \ 2009
    Soil Biology and Biochemistry 41 (2009)8. - ISSN 0038-0717 - p. 1717 - 1725.
    fresh-water wetlands - scots pine forest - nitrogen mineralization - microbial communities - northern wetlands - nutrient dynamics - food webs - carbon - diversity - protozoa
    Reducing decomposition and mineralization of organic matter by increasing groundwater levels is a common approach to reduce plant nutrient availability in many peat meadow restoration projects. The soil community is the main driver of these processes, but how community composition is affected by peat meadow restoration is largely unknown. Furthermore, it is unclear whether restoration induced changes could lead to altered decomposition and mineralization rates. We determined soil community composition in restored peat meadows with different groundwater levels and soil pH. This composition was subsequently used in food web model calculations of C and N mineralization rates to assess whether differences in soil community composition may have contributed to differences in decomposition and mineralization rates observed between these meadows. Community composition of micro-organisms, Collembola and Enchytraeidae differed considerably between meadows and were correlated with differences in groundwater levels and soil pH. Collembolan and enchytraeid species from wet and neutral environments were more abundant at meadows with higher groundwater levels. Lower fungal to bacterial PLFA ratios and higher numbers of protozoa indicated an increased importance of the bacterial part of the food web at meadows with higher groundwater levels. Food web model calculations suggested that the observed changes in community composition would lead to higher rates of C and N mineralization at meadows with high groundwater levels. Results from modeling were consistent with field measurements of C mineralization, but not with measurements of N mineralization
    Accumulation of heavy metals by enchytraeids and earthworms in a floodplain
    Vliet, P.C.J. van; Didden, W.A.M. ; Zee, S.E.A.T.M. van der; Peijnenburg, W.J.G.M. - \ 2006
    European Journal of Soil Biology 42 (2006)Suppl. 1. - ISSN 1164-5563 - p. S117 - S126.
    eisenia-foetida - copper - cadmium - soils - zinc - resistance - buchholzi - toxicity - field - lead
    The river floodplain `Afferdense and Deestsche Waarden¿ (ADW) in The Netherlands is diffusely contaminated with several heavy metals. It is, however, unclear whether this mixed contamination exerts any adverse ecotoxicological effects. In November 2000 and May 2001 a field survey was conducted in two areas in the ADW to collect a wide range of data concerning contamination levels, bioavailability, enchytraeids and earthworms and abiotic factors such as lutum and organic matter content, cation exchange capacity (CEC) and soil nutrient concentrations. Earthworms and enchytraeids were also analyzed for heavy metal content. At both sites arsenic and zinc were present in soil at relatively high oncentrations (above the Dutch intervention value). In the two areas, both enchytraeids and earthworms accumulated metals. Fridericia ulrikae accumulated more cadmium than Enchytraeus buchholzi and Henlea perpusilla. The earthworm Lumbricus rubellus accumulated larger concentrations of Cr, Cu and Pb than Aporrectodea caliginosa and Allolobophora chlorotica. Dietary, physiological and behavioral characteristics may have contributed to these differences
    The use of enchytraeids in ecological soil classification and assessment concepts
    Jansch, S. ; Rombke, J. ; Didden, W.A.M. - \ 2005
    Ecotoxicology and Environmental Safety 62 (2005)2 sp. iss.. - ISSN 0147-6513 - p. 266 - 277.
    body-surface area - terrestrial enchytraeidae - northern england - mineral sites - oligochaeta - forest - associations - density - peat
    In many soils worldwide, enchytraeids (Annelida: Oligochaeta) play a major role in soil functions like the decomposition of organic matter. In addition, standardized sampling methods are available and taxonomic as well as ecological knowledge is rapidly increasing (in particular, ecological profiles of the most abundant species). For these reasons, enchytraeids were recognized as a part of ecological classification and assessment schemes. In this contribution, the most important of these schemes are presented and it is shown that enchytraeids are most valuable as part of a battery approach. By use of examples from The Netherlands (BISQ), and Germany (BBSK), the practicability of the use of enchytraeids is demonstrated in identifying the influence of different anthropogenic land use forms. In these cases, the structure of the enchytraeid community and their abundance and biomass were used as endpoints. However, automation of the identification process can still be improved.
    The use of earthworms in ecological soil classification and assessment concepts
    Rombke, J. ; Jansch, S. ; Didden, W.A.M. - \ 2005
    Ecotoxicology and Environmental Safety 62 (2005)2 sp. iss.. - ISSN 0147-6513 - p. 249 - 265.
    ecosystem engineers - southern sweden - heavy-metals - forest soil - populations - lumbricidae - oligochaeta - organisms - profiles - invertebrates
    Without doubt, earthworms are the most important soil invertebrates in most soils worldwide, in terms of both biomass and activity. Several species are even considered to be ecosystem engineers. Earthworms are also known to influence soil structure, soil chemistry, and, in particular, processes like organic matter decomposition. In addition, standardized sampling methods are available and their taxonomy is well known (even the first PC-aided keys have been developed). For these reasons, earthworms were recognized as a part of ecological classification and assessment schemes early on. However, due to the relatively small number at many sites, they have to be part of a battery approach. By use of examples from The Netherlands (biological indicator of soil quality) and Germany (soil biological site classification), the practicability of the use of earthworms is demonstrated in determining the influence of different anthropogenic land use forms. In these cases, the structure of the earthworm community, as well as their abundance and biomass, were used as endpoints.
    Enchytraeid communities in grasslands on peat at different groundwater levels
    Didden, W.A.M. ; Dijk, J. van - \ 2005
    Proceedings of the Estonian Academy of Sciences. Biology. Ecology 54 (2005)4. - p. 315 - 322.
    Soil macrofauna community structure along a gradient of land use intensification in the humid forest zone of southern Cameroon.
    Madong à Birang, - \ 2004
    Wageningen University. Promotor(en): Lijbert Brussaard, co-promotor(en): W.A.M. Didden; S. Hauser. - Wageningen : S.n. - ISBN 9789085040316 - 200
    bodemfauna - bodeminvertebraten - aardwormen - formicidae - isoptera - zwerflandbouw - landgebruik - bossen - humide klimaatzones - kameroen - macrofauna - soil fauna - soil invertebrates - earthworms - formicidae - isoptera - shifting cultivation - land use - forests - humid zones - cameroon - macrofauna
    The impact of land use systems on soil macrofauna community structures is described as well as their relationships with the vegetation and soil parameters in the humid forest zone of southernCameroon. 36 Earthworm species were found. A completely different earthworm assemblage was found at high LUI while low and medium LUI blocks had species in common in the various functional groups. Earthworm surface casting decreased when fallow plots were converted to cultivated fields. This reduction depended on the type of fallow. 223 Termite species were recorded.There was no significant effect of LUI but in contrast, a strong effect of LUS on termite species richness and abundance. 80 Ant species were found. LUI and LUS had striking effects on ant communities with highest richness in the low LUI block. Ant species assemblages were location specific.Soil macrofaunal species richness was more responsive to soil and vegetation parameters than macrofaunal abundances.The knowledge gathered on the present state of earthworm, termite and ant communities and the effects of land use change on these macrofauna in southernCameroonconstitutes the baseline information necessary for the design and /or implementation of measures of conservation in which farmers should play a pivotal role.
    Accumulation of heavy metals by enchytraeids and earthworms in a floodplain
    Vliet, P.C.J. van; Didden, W.A.M. ; Zee, S.E.A.T.M. van der; Ma, W.C. ; Peijnenburg, W.J.G.M. - \ 2004
    In: Environmental science solutions: a pan-European perspective. - Brussels (Belgium) : SETAC - p. 258 - 258.
    Taxonomy of Fridericia (Oligochaeta, Enchytraeidae)
    Didden, W.A.M. ; Vliet, P.C.J. van - \ 2004
    Pedobiologia 48 (2004)4. - ISSN 0031-4056 - p. 409 - 410.
    Accumulation of heavy metals by enchytraeids and earthworms in a floodplain
    Vliet, P.C.J. van; Didden, W.A.M. ; Zee, S.E.A.T.M. van der; Ma, W.C. ; Peijnenburg, W.J.G.M. - \ 2004
    In: XIVth international colloquium on soil zoology and ecology; abstracts. - [S.l.] : S.n. - p. 185 - 185.
    Biological soil quality from biomass to biodiversity - importance and resilience to management stress and disturbance
    Brussaard, L. ; Kuyper, T.W. ; Didden, W.A.M. ; Goede, R.G.M. de; Bloem, J. - \ 2004
    In: Managing soil quality; challenges in modern agriculture / Schjønning, P., Elmholt, S., Christensen, B.T., Wallingford (UK) : CABI Publishing - ISBN 9780851996714 - p. 139 - 161.
    bodembiologie - biodiversiteit - bodemkwaliteit - soil biology - biodiversity - soil quality
    Various aspects of the soil biota react sensitively to changes in the environment, including agricultural management. Changes in soil biodiversity cannot easily observed directly (measured in terms of community structure of microbes and nematodes, giving early warnings of long-term changes in organic matter, nutrient status and soil structure)
    Measuring soil biodiversity: experiences, impediments and research needs
    Bloem, J. ; Didden, W.A.M. ; Jagers op Akkerhuis, G.A.J.M. ; Keidel, H. ; Rutgers, M. ; Breure, T. - \ 2004
    In: Agricultural impacts on soil erosion and soil biodiversity: developing indicators for policy analysis. - Rome (Italy) : Istituto Sperimentale per la Nutrizione delle Piante - p. 109 - 120.
    We summarise methods to assess biomass, activity and diversity of soil organisms and show some results. In contaminated soils community structure had changed but diversity was not always reduced. Biomass and activity were much more reduced than diversity. In agricultural soils organic management resulted in an increased role of soil organisms. Replacement of mineral fertilisers by farmyard manure stimulated the bacterial branch of the soil food web. Reduced availability of mineral nutrients appeared to increase fungi, presumably mycorrhiza. Bacterial DNA profiles did not indicate low genetic diversity in agricultural soils. At extensive and biological grassland farms nitrogen mineralisation was about 50% higher than at intensive farms. Not only microbial biomass and activity but also different groups of soil fauna tended to be higher. Soil biodiversity can not be monitored meaningfully with a few simple tools. Extensive and long-term monitoring is probably the most realistic approach to obtain objective information on differences between, changes within, and human impact on ecosystems. In most countries, microbial biomass, respiration and potential N mineralisation are regarded as part of a minimum data set. Adding the main functional groups of the soil food web brings us closer to biodiversity and gives the potential to relate the structure of the soil community to functions.
    Biological soil quality
    Brussaard, L. ; Kuyper, T.W. ; Didden, W.A.M. ; Goede, R.G.M. de; Bloem, J. - \ 2003
    In: Future soils managing soil Resources to ensure access to markets for future generations : Australian society of soil science national conference, Perth, 2002 / D. Williamson, C. Tang, A. Rate [S.l.] : s.n. - p. 6 - 13.
    Efffects of heavy metals on enchytraeid community composition in floodplain grasslands
    Vliet, P.C.J. van; Didden, W.A.M. - \ 2003
    In: 5th International Symposium on Enchytraeidae / Didden, W.A.M., van Vliet, P.C.J., Wageningen : Wageningen University - p. 97 - 108.
    Newsletter on Enchytraeidae
    Didden, W.A.M. ; Vliet, P.C.J. van - \ 2003
    Development and potential of a stereotype as a reference site in ecological monitoring
    Didden, W.A.M. - \ 2003
    In: 5th International Symposium on Enchytraeidae / Didden, W.A.M., van Vliet, P.C.J., Wageningen : Wageningen University - p. 33 - 40.
    The effect of prolonged storage time on extraction results for enchytraeids
    Didden, W.A.M. - \ 2003
    In: 5th International Symposium on Enchytraeidae / Didden, W.A.M., Vliet, P.C.J., Wageningen : Wageningen University - p. 69 - 75.
    Oligochaeta
    Didden, W.A.M. - \ 2003
    In: Bioindicators & Biomonitors-Principles, concepts and applications / Markert, B.A., Breure, A.M., Zechmeister, H.G., Amsterdam : Elsevier - ISBN 9780080441771 - p. 555 - 576.
    lumbricidae - aardwormen - bodemverontreiniging - biologische indicatoren - ecotoxicologie - biologische monitoring - earthworms - soil pollution - biological indicators - ecotoxicology - biomonitoring
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