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Ajouter le résultat dans votre panierAdmixture between native and invasive populations may increase invasiveness of Mimulus guttatus / Mark van Kleunen in Proceedings of the Royal Society. Biological Sciences, 282 (2015)
Titre : Admixture between native and invasive populations may increase invasiveness of Mimulus guttatus Type de document : Électronique Auteurs : Mark van Kleunen (1973-) ; M Röckle ; M Stift Année de publication : 2015 Article en page(s) : 10 p. Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Mimulus guttatus Fisch. ex DC., 1813 Résumé : Self-fertilization and admixture of genotypes from different populations can have major fitness consequences in native species. However, few studies have addressed their potential roles in invasive species. Here, we used plants of Mimulus guttatus from seven native North American, three invasive Scottish and four invasive New Zealand populations to address this. We created seeds from self-fertilization, within-population outcrossing, between-population outcrossing within the same range, and outcrossing between the native and invasive ranges. A greenhouse experiment showed that native and invasive plants of M. guttatus suffered to similar degrees from inbreeding depression, in terms of asexual reproduction and biomass production. After outcrossing with plants from other populations, M. guttatus benefited from heterosis, in terms of asexual and sexual reproduction, and biomass production, particularly when plants from native and invasive populations were crossed. This suggests that, when novel genotypes of M. guttatus from the native North American range will be introduced to the invasive ranges, subsequent outcrossing with M. guttatus plants that are already there might further boost invasiveness of this species. Lien pérenne : DOI : 10.1098/rspb.2015.1487 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=142799
in Proceedings of the Royal Society. Biological Sciences > 282 (2015) . - 10 p.Kleunen, Mark van (1973-), Röckle, M, Stift, M 2015 Admixture between native and invasive populations may increase invasiveness of Mimulus guttatus. Proceedings of the Royal Society. Biological Sciences, 282: 10 p..Documents numériques
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Titre : High effectiveness of tailored flower strips in reducing pests and crop plant damage Type de document : Électronique Auteurs : Matthias Tschumi (1986-) ; Matthias Albrecht ; Martin H. Entling ; Katja Jacot (1971-) Année de publication : 2015 Article en page(s) : 20151369 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Agroécologie
[CBNPMP-Thématique] Lutte biologique
[CBNPMP-Thématique] MalherbologieRésumé : Providing key resources to animals may enhance both their biodiversity and the ecosystem services they provide. We examined the performance of annual flower strips targeted at the promotion of natural pest control in winter wheat. Flower strips were experimentally sown along 10 winter wheat fields across a gradient of landscape complexity (i.e. proportion non-crop area within 750 m around focal fields) and compared with 15 fields with wheat control strips. We found strong reductions in cereal leaf beetle (CLB) density (larvae: 40%; adults of the second generation: 53%) and plant damage caused by CLB (61%) in fields with flower strips compared with control fields. Natural enemies of CLB were strongly increased in flower strips and in part also in adjacent wheat fields. Flower strip effects on natural enemies, pests and crop damage were largely independent of landscape complexity (8–75% non-crop area). Our study demonstrates a high effectiveness of annual flower strips in promoting pest control, reducing CLB pest levels below the economic threshold. Hence, the studied flower strip offers a viable alternative to insecticides. This highlights the high potential of tailored agri-environment schemes to contribute to ecological intensification and may encourage more farmers to adopt such schemes. Lien pérenne : DOI : 10.1098/rspb.2015.1369 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=143294
in Proceedings of the Royal Society. Biological Sciences > 282 (2015) . - 20151369Tschumi, Matthias (1986-), Albrecht, Matthias, Entling, Martin H., Jacot, Katja (1971-) 2015 High effectiveness of tailored flower strips in reducing pests and crop plant damage. Proceedings of the Royal Society. Biological Sciences, 282: 20151369.Documents numériques
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Titre : Organic fields sustain weed metacommunity dynamics in farmland landscapes Type de document : Électronique Auteurs : Laura Henckel, Auteur ; Luca Börger, Auteur ; Helmut Meiss, Auteur ; Sabrina Gaba (1978-), Auteur ; Vincent Bretagnolle, Auteur Année de publication : 2015 Article en page(s) : 1-8 Langues : Anglais (eng) Résumé : Agro-ecosystems constitute essential habitat for many organisms. Agricultural intensification, however, has caused a strong decline of farmland biodiversity. Organic farming (OF) is often presented as amore biodiversity-friendly practice, but the generality of the beneficial effects of OF is debated as the effects appear often species- and context-dependent, and current research has highlighted theneedtoquantify therelativeeffectsof local- and landscape-scalemanagement on farmland biodiversity. Yet very few studies have investigated the landscapelevel effects of OF; that is to say, how the biodiversity of a field is affected by the presence or density of organically farmed fields in the surrounding landscape. We addressed this issue using the metacommunity framework, with weed species richness in winter wheat within an intensively farmed landscape in France asmodel system.Controlling for the effects of local and landscape structure, we showed that OF leads to higher local weed diversity and that the presence of OF in the landscape is associated with higher localweed biodiversity also for conventionally farmed fields, and may reach a similar biodiversity level to organic fields in field margins. Based on these results,we derive indications for improving the sustainable management of farming systems. Lien pérenne : DOI : 10.1098/rspb.2015.0002 / HAL : hal-01199764
Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=144387
in Proceedings of the Royal Society. Biological Sciences > 282 (2015) . - 1-8Henckel, Laura, Börger, Luca, Meiss, Helmut, Gaba, Sabrina (1978-), Bretagnolle, Vincent 2015 Organic fields sustain weed metacommunity dynamics in farmland landscapes. Proceedings of the Royal Society. Biological Sciences, 282: 1-8.Documents numériques
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