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    • Article
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    Ingestion and excretion of two transgenic Bt corn varieties by slugs

    Zurbrügg, Corinne
    Nentwig, Wolfgang
    Transgenic Research. - 2009/18/2/215-225
    Disponible
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    Titre: Ingestion and excretion of two transgenic Bt corn varieties by slugs
    Auteur: Zurbrügg, Corinne
    Contributeur: Nentwig, Wolfgang
    Sujet: Enzyme-linked immunosorbent assay - Genetically modified maize - Mollusca - Decomposer food web - Natural enemies - Trophic interactions
    Description: The release of transgenic Bacillus thuringiensis (Bt) corn expressing various Cry endotoxins has raised concern that these endotoxins are disseminated in the food web and may adversely affect non-target beneficial organisms, such as predators and organisms of the decomposer food web. We therefore investigated in a laboratory study, whether the Cry1Ab and Cry3Bb1 protein from Bt corn could potentially be transferred to such organisms by measuring the Cry protein content in the two common agricultural slug pests Arion lusitanicus and Deroceras reticulatum and their feces. We measured Cry1Ab and Cry3Bb1 protein concentration in leaves, intestines, and feces of corn leaf-fed slugs using ELISA and determined how much of the ingested protein is excreted by the slugs. Cry3Bb1 concentration in leaves of DKC5143Bt corn was significantly higher than Cry1Ab concentration in leaves of N4640Bt corn. While slugs were feeding on corn leaves, the Cry3Bb1 and Cry1Ab proteins were found in intestines and feces of both slug species. Bt protein concentrations in intestines of Cry3Bb1 corn-fed slugs were in both slug species higher than in Cry1Ab corn fed slugs, whereas no differences between Cry3Bb1 and Cry1Ab protein in feces were found. After slugs had ceased feeding on Bt corn, Cry1Ab was detectable in fresh slug feces for a significantly longer time and often in higher amounts than the Cry3Bb1. Our results indicate that both Cry proteins are likely to be transferred to higher trophic levels and to the decomposer food web. Since different Bt proteins seem to vary in their degradation, they have different transfer probabilities. This should be considered in risk assessments for non-target arthropods
    Publication en relation: Transgenic Research. - 2009/18/2/215-225
    Document hôte: Transgenic Research
    Identifiant: 10.1007/s11248-008-9208-1 (DOI)

    • Plusieurs versions

    Taxonomic database: Spider taxonomists catch data on web

    Nentwig, Wolfgang, Gloor, Daniel, Kropf, Christian
    Nature, 24 December 2015, Vol.528(7583), pp.479 [Revue évaluée par les pairs]
    MEDLINE/PubMed (U.S. National Library of Medicine)
    • Plusieurs versions

    Ökologie kompakt

    Nentwig, Wolfgang
    • Article
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    The burrow system of the common vole (M. arvalis, Rodentia) in Switzerland

    Brügger, Andrea
    Nentwig, Wolfgang, Airoldi, Jean-Pierre
    mammalia. - 2010/74/3/311-315
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    Titre: The burrow system of the common vole (M. arvalis, Rodentia) in Switzerland
    Auteur: Brügger, Andrea
    Contributeur: Nentwig, Wolfgang; Airoldi, Jean-Pierre
    Sujet: burrow centre - eccentricity - graph theory - habitat - Microtus arvalis - season
    Description: Fifty burrow systems of Microtus arvalis were excavated, from October 2006 to August 2007 in wildflower fields and quasi-natural habitats in five areas near Bern, Switzerland. They comprise an aboveground part, which is longer in spring/summer, and a subterranean part, which is longer in autumn/winter. Three main construction types exist: (a) linear burrows, (b) compact and tight networks, and (c) structures containing both a compact network around the nest and linear parts elsewhere. The subterranean length was on average 16.9m (range: 0.5-70.2m) and aboveground length 39.4m (range: 0-95m). Numbers of intersections, dead ends, and openings correlate significantly with subterranean burrow length. Nests and food caches were located at a maximal depth and mostly in a central position, as revealed by graph theory
    Publication en relation: mammalia. - 2010/74/3/311-315
    Document hôte: mammalia
    Identifiant: 10.1515/mamm.2010.035 (DOI)

    • Article
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    Progress in erigonine spider phylogeny—the Savignia -group is not monophyletic (Araneae: Linyphiidae)

    Frick, Holger
    Nentwig, Wolfgang, Kropf, Christian
    Organisms Diversity & Evolution. - 2010/10/4/297-310
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    Titre: Progress in erigonine spider phylogeny—the Savignia -group is not monophyletic (Araneae: Linyphiidae)
    Auteur: Frick, Holger
    Contributeur: Nentwig, Wolfgang; Kropf, Christian
    Sujet: Phylogeny - Morphology - Complex genital organs - Dwarf spiders - Erigoninae
    Description: We present the most inclusive study on the higher-level phylogeny of erigonine spiders, including about 30% of all erigonine genera. By expanding the previously most comprehensive analysis (Miller and Hormiga Cladistics 20:385-442, 2004) we tested the robustness of its results to the addition of closely related taxa, and also the monophyly of the Savignia-group defined by Millidge (Bulletin of the British Arachnological Society 4:1-60, 1977). The character matrix was expanded by adding 18 newly scored species in 15 genera, and also includes all species scored by other authors. This adds up to 98 species in 91 erigonine genera plus 13 outgroup taxa. The parsimony analysis led to eight fully resolved most parsimonious trees (L=1084). The topology concerning the taxa basal to the ‘distal erigonines' remained unchanged, and the latter clade still shares 67% of all nodes with the original analysis. The Savignia-group is not monophyletic at genus level with respect to Saloca diceros and Alioranus pastoralis, and the same applies at species level in Diplocephalus and Erigonella. From the Savignia-group, Glyphesis servulus, Diplocephalus cristatus, Savignia frontata, and two representatives each of Erigonella, Dicymbium and Araeoncus combine to form a monophyletic clade
    Publication en relation: Organisms Diversity & Evolution. - 2010/10/4/297-310
    Document hôte: Organisms Diversity & Evolution
    Identifiant: 10.1007/s13127-010-0023-1 (DOI)

    • Livre
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    Unheimliche Eroberer : invasive Tiere und Pflanzen in Europa

    Nentwig, Wolfgang
    Bern : Haupt Verl.
    2011
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    Titre: Unheimliche Eroberer : invasive Tiere und Pflanzen in Europa / Wolfgang Nentwig (Hrsg.)
    Auteur: Nentwig, Wolfgang
    Editeur: Bern : Haupt Verl.
    Date: 2011
    Collation: 251 S. : Ill.
    Sujet RERO: invasion (biologie) - Animaux - Plantes - Europe
    Sujet RERO - forme: [Photographies] - [Études diverses]
    Classification: PHDK 577.4
    PHSW Europa allgemein
    PHSW Invasive Art
    PHSW Lebensraum
    Identifiant: 325807660X (ISBN); 9783258076607 (ISBN)
    No RERO: R005997069
    Permalien:
    http://data.rero.ch/01-R005997069/html?view=FR_V1

    • Article
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    Establishing systemic rust infections in Cirsium arvense in the field

    Wandeler, Heiri
    Nentwig, Wolfgang, Bacher, Sven
    Biocontrol Science and Technology. - 2008/18/2/209-214
    2008
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    Titre: Establishing systemic rust infections in Cirsium arvense in the field
    Auteur: Wandeler, Heiri
    Contributeur: Nentwig, Wolfgang; Bacher, Sven
    Date: 2008
    Sujet: biological weed control - Ceratapion (=Apion) onopordi - Cirsium arvense - field experiment - Puccinia punctiformis - rust fungus - systemic infection
    Description: An existing method to induce systemic rust infections in creeping thistles (Cirsium arvense) using an insect vector, the weevil Ceratapion onopordi, was successfully applied in the field. Urediniospores of Puccinia punctiformis were experimentally transmitted to naturally grown thistles, to our knowledge for the first time resulting in systemically infected shoots in an established thistle population.
    Publication en relation: Biocontrol Science and Technology. - 2008/18/2/209-214
    Document hôte: Biocontrol Science and Technology
    Identifiant: 10.1080/09583150701727363 (DOI)

    • Article
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    A generic impact-scoring system applied to alien mammals in Europe

    Nentwig, Wolfgang
    Kühnel, Elfi, Bacher, Sven
    Conservation Biology. - 2009///doi: 10.1111/j.1523-1739.2009.01289.x
    2009
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    Titre: A generic impact-scoring system applied to alien mammals in Europe
    Auteur: Nentwig, Wolfgang
    Contributeur: Kühnel, Elfi; Bacher, Sven
    Date: 2009
    Sujet: ecological impact - environmental impact - invasive species - mitigation - prioritization - species traits - stakeholders
    Description: We present a generic scoring system that compares the impact of alien species among members of large taxonomic groups. This scoring can be used to identify the most harmful alien species so that conservation measures to ameliorate their negative effects can be prioritized. For all alien mammals in Europe, we assessed impact reports as completely as possible. Impact was classified as either environmental or economic. We subdivided each of these categories into five subcategories (environmental: impact through competition, predation, hybridization, transmission of disease, and herbivory; economic: impact on agriculture, livestock, forestry, human health, and infrastructure). We assigned all impact reports to one of these 10 categories. All categories had impact scores that ranged from zero (minimal) to five (maximal possible impact at a location). We summed all impact scores for a species to calculate "potential impact" scores. We obtained "actual impact" scores by multiplying potential impact scores by the percentage of area occupied by the respective species in Europe. Finally, we correlated species' ecological traits with the derived impact scores. Alien mammals from the orders Rodentia, Artiodactyla, and Carnivora caused the highest impact. In particular, the brown rat (Rattus norvegicus), muskrat (Ondathra zibethicus), and sika deer (Cervus nippon) had the highest overall scores. Species with a high potential environmental impact also had a strong potential economic impact. Potential impact also correlated with the distribution of a species in Europe. Ecological flexibility (measured as number of different habitats a species occupies) was strongly related to impact. The scoring system was robust to uncertainty in knowledge of impact and could be adjusted with weight scores to account for specific value systems of particular stakeholder groups (e.g., agronomists or environmentalists). Finally, the scoring system is easily applicable and adaptable to other taxonomic groups.
    Publication en relation: Conservation Biology. - 2009///doi: 10.1111/j.1523-1739.2009.01289.x
    Document hôte: Conservation Biology
    Identifiant: 10.1111/j.1523-1739.2009.01289.x (DOI)

    • Livre
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    Humanökologie : Fakten - Argumente - Ausblicke

    Nentwig, Wolfgang
    Berlin : Springer
    [1995]
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    Titre: Humanökologie : Fakten - Argumente - Ausblicke / Wolfgang Nentwig
    Auteur: Nentwig, Wolfgang
    Editeur: Berlin : Springer
    Date: [1995]
    Collation: 588 S. : Ill. ; 25 cm
    Note: Enthält Literatur (S. [563]-574) und ein Sachverz
    Classification: LC GF41
    IZOOL OE-Nen-95
    Identifiant: 3540585001 (ISBN)
    No RERO: 2111635
    Permalien:
    http://data.rero.ch/01-2111635/html?view=FR_V1

    • Livre
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    Ökologie

    Nentwig, Wolfgang
    Heidelberg [etc.] : Spektrum Akademischer Verl.
    [2004]
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    Titre: Ökologie / Wolfgang Nentwig... [et al.]
    Auteur: Nentwig, Wolfgang
    Editeur: Heidelberg [etc.] : Spektrum Akademischer Verl.
    Date: [2004]
    Collation: X, 466 p. : ill. ; 27 cm
    Collection: Spektrum Lehrbuch
    Documents dans cette collection: Spektrum Lehrbuch
    Sujet RERO: Écologie
    Sujet RERO - forme: [Manuels d'enseignement]
    Note: Bibliogr.: p. 433-450
    Classification: LC QH541
    Identifiant: 3827401720 (ISBN)
    No RERO: R003573327
    Permalien:
    http://data.rero.ch/01-R003573327/html?view=FR_V1