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Auteur Félix Wäckers |
Documents disponibles écrits par cet auteur (3)
Affiner la rechercheNectar accessibility determines fitness, flower choice and abundance of hoverflies that provide natural pest control / Paul C. J. van Rijn in Journal of applied ecology, 53 (2016)
Titre : Nectar accessibility determines fitness, flower choice and abundance of hoverflies that provide natural pest control Type de document : Imprimé Auteurs : Paul C. J. van Rijn ; Félix Wäckers Année de publication : 2016 Article en page(s) : 925-933 Langues : Anglais (eng) Catégories : [LOTERRE-Biodiversité] Pollinisateur Résumé : In modern agricultural landscapes, many organisms providing ecosystem services such as pollination and natural pest control are likely constrained by shortage of nectar and/or pollen required for adult nutrition. More and more flower-rich field margin strips and other habitats are created to eliminate these constraints. For most target organisms, however, it is not well known which (types of) flowers are effective in providing suitable pollen and nectar. We studied the suitability of a wide range of flowers as a food source for zoophagous hoverflies (hoverflies with predatory larvae) at five different levels: nectar accessibility (based on flower morphology), realized adult fitness, flower choice (both based on cage experiments), flower visitation and hoverfly abundance in mixed vegetation (both based on field observations). Realized survival of Episyrphus balteatus is related to effective flower depth by a sigmoid function. The critical flower depth is 1·6 mm, which is less than the proboscis size of the hoverfly. For Asteraceae, the critical floret depth is even less than 1·0 mm, which – in contrast to common knowledge – rules out most species within this family. Both flower choice in the laboratory and flower visitation rates in the field are well correlated with nectar accessibility and realized adult survival. In mixed floral vegetation, the number of zoophagous hoverflies is highly correlated with the abundance of only those flowers that have accessible nectar for these hoverflies.
Synthesis and applications. This comparative study demonstrates that nectar (and not pollen) accessibility is the main driver determining flower resource suitability, flower choice and abundance of zoophagous hoverflies in arable field margins. The study identifies the limited range of plant species that can effectively support these beneficial insects. Preserving the right flowers in and around agricultural fields could enhance local populations and the pest control and pollination services they provide.
Lien pérenne : DOI : 10.1111/1365-2664.12605 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150748
in Journal of applied ecology > 53 (2016) . - 925-933Rijn, Paul C. J. van, Wäckers, Félix 2016 Nectar accessibility determines fitness, flower choice and abundance of hoverflies that provide natural pest control. Journal of applied ecology, 53: 925-933.Documents numériques
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Article (2016)URL
Titre : The effectiveness of flower strips and hedgerows on pest control, pollination services and crop yield: a quantitative synthesis Type de document : Électronique Auteurs : Matthias Albrecht ; David Kleijn ; Neal M. Williams ; Matthias Tschumi (1986-) ; Brett R. Blaauw ; Riccardo Bommarco ; Alistair J. Campbell ; Matteo Dainese ; Francis A. Drummond ; Martin H. Entling ; Dominik Ganser ; G. Arjen de Groot ; Dave Goulson ; Heather Grab ; Hannah Hamilton ; Félix Herzog ; Rufus Isaacs ; Katja Jacot (1971-) ; Philippe Jeanneret ; Mattias Jonsson ; Eva Knop ; Claire Kremen ; Douglas A. Landis ; Gregory M. Loeb ; Lorenzo Marini ; Megan McKerchar ; Lora Morandin ; Sonja C. Pfister ; Simon G. Potts ; Maj Rundölf ; Hillary Sardiñas ; Amber Sciligo ; Carsten Thies ; Teja Tscharntke (1952-) ; Eric Venturini ; Eve Veromann ; Ines M. G. Vollhardt ; Félix Wäckers ; Kimiora Ward ; Duncan B. Westbury ; Andrew Wilby ; Megan Woltz ; Steve Wratten ; Louis Sutter Année de publication : 2020 Article en page(s) : 1-11 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Agroécologie
[CBNPMP-Thématique] Coadaptation, coévolution, symbiose (dissémination, pollinisation)Résumé : Floral plantings are promoted to foster ecological intensification of agriculture through provisioning of ecosystem services. However, a comprehensive assessment of the effectiveness of different floral plantings, their characteristics and consequences for crop yield is lacking. Here we quantified the impacts of flower strips and hedgerows on pest control (18 studies) and pollination services (17 studies) in adjacent crops in North America, Europe and New Zealand. Flower strips, but not hedgerows, enhanced pest control services in adjacent fields by 16% on average. However, effects on crop pollination and yield were more variable. Our synthesis identifies several important drivers of variability in effectiveness of plantings: pollination services declined exponentially with distance from plantings, and perennial and older flower strips with higher flowering plant diversity enhanced pollination more effectively. These findings provide promising pathways to optimise floral plantings to more effectively contribute to ecosystem service delivery and ecological intensification of agriculture in the future. Lien pérenne : DOI : 10.1111/ele.13576 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=143465
in Ecology Letters > 23 (10) (2020) . - 1-11Albrecht, Matthias, Kleijn, David, Williams, Neal M., Tschumi, Matthias (1986-), Blaauw, Brett R., Bommarco, Riccardo, Campbell, Alistair J., Dainese, Matteo, Drummond, Francis A., Entling, Martin H., Ganser, Dominik, Arjen de Groot, G., Goulson, Dave, Grab, Heather, Hamilton, Hannah, Herzog, Félix, Isaacs, Rufus, Jacot, Katja (1971-), Jeanneret, Philippe, Jonsson, Mattias, Knop, Eva, Kremen, Claire, Landis, Douglas A., Loeb, Gregory M., Marini, Lorenzo, McKerchar, Megan, Morandin, Lora, Pfister, Sonja C., Potts, Simon G., Rundölf, Maj, Sardiñas, Hillary, Sciligo, Amber, Thies, Carsten, Tscharntke, Teja (1952-), Venturini, Eric, Veromann, Eve, Vollhardt, Ines M. G., Wäckers, Félix, Ward, Kimiora, Westbury, Duncan B., Wilby, Andrew, Woltz, Megan, Wratten, Steve, Sutter, Louis 2020 The effectiveness of flower strips and hedgerows on pest control, pollination services and crop yield: a quantitative synthesis. Ecology Letters, 23(10): 1-11.Documents numériques
Article (2009)URL
Titre : The suitability of field margin flowers as food source for zoophagous hoverflies Type de document : Imprimé Auteurs : Paul C. J. van Rijn ; Félix Wäckers Année de publication : 2010 Article en page(s) : 125-128 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Conservation et gestion des espèces Résumé : Hoverflies with zoophagous larvae are among the most common natural enemies of pests in Dutch arable fields. Their effectiveness is partly limited by the availability of nectar and pollen for the adults. In this study we examined the suitability of flowers of ca. 30 plant species as food source for the common Episyrphus balteatus, both with choice tests and with non-choice survival tests. Many common field margin flowers appear to be unsuitable, as they do not allow the hoverflies to survive up to their reproductive age. The results can well be explained by flower morphology: only flowers with nectar available at a depth of less than 2 mm are suitable. Choice tests indicate that the hoverflies mainly select flowers with accessible nectar. Moreover, field studies showed that field margins with a higher proportion of flowers with accessible nectar attract higher numbers of zoophagous hoverflies. These results stress the importance of laboratory bioassays for selecting the right plants for functional field margins. Lien pérenne : Handle : 11245/1.333932 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150763
in Landscape management for functional biodiversity > 56 (2010) . - 125-128Rijn, Paul C. J. van, Wäckers, Félix 2010 The suitability of field margin flowers as food source for zoophagous hoverflies. Landscape management for functional biodiversity, 56: 125-128.Documents numériques
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Article (2010)URL
