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'Viola arvensis' 




Ongoing convergent evolution of a selfing syndrome threatens plant–pollinator interactions / Samson Acoca-Pidolle in New Phytologist, (19 December 2023)
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Titre : Ongoing convergent evolution of a selfing syndrome threatens plant–pollinator interactions Type de document : Imprimé Auteurs : Samson Acoca-Pidolle ; Perrine Gauthier ; Louis Devresse ; Antoine Deverge Merdrignac ; Virginie Pons ; Pierre-Olivier Cheptou Année de publication : 2023 Article en page(s) : 1-10 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Pollinisateur
[CBNPMP-Thématique] Relations et interactions individus-espècesMots-clés : Viola arvensis Résumé : Plant–pollinator interactions evolved early in the angiosperm radiation. Ongoing environmental changes are however leading to pollinator declines that may cause pollen limitation to plants and change the evolutionary pressures shaping plant mating systems. We used resurrection ecology methodology to contrast ancestors and contemporary descendants in four natural populations of the field pansy (Viola arvensis) in the Paris region (France), a depauperate pollinator environment. We combine population genetics analysis, phenotypic measurements and behavioural tests on a common garden experiment. Population genetics analysis reveals 27% increase in realized selfing rates in the field during this period. We documented trait evolution towards smaller and less conspicuous corollas, reduced nectar production and reduced attractiveness to bumblebees, with these trait shifts convergent across the four studied populations. We demonstrate the rapid evolution of a selfing syndrome in the four studied plant populations, associated with a weakening of the interactions with pollinators over the last three decades. This study demonstrates that plant mating systems can evolve rapidly in natural populations in the face of ongoing environmental changes. The rapid evolution towards a selfing syndrome may in turn further accelerate pollinator declines, in an eco-evolutionary feedback loop with broader implications to natural ecosystems. Lien pérenne : DOI : 10.1111/nph.19422 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=152237
in New Phytologist > (19 December 2023) . - 1-10Acoca-Pidolle, Samson, Gauthier, Perrine, Devresse, Louis, Deverge Merdrignac, Antoine, Pons, Virginie, Cheptou, Pierre-Olivier 2023 Ongoing convergent evolution of a selfing syndrome threatens plant–pollinator interactions. New Phytologist: 1-10.Documents numériques
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Article (2023)URLWeed seed choice by carabid beetles (Coleoptera: Carabidae): Linking field measurements with laboratory diet assessments / Sandrine Petit in European Journal of Entomology, 111 (5) (2014)
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Titre : Weed seed choice by carabid beetles (Coleoptera: Carabidae): Linking field measurements with laboratory diet assessments Type de document : Imprimé Auteurs : Sandrine Petit (1969-) ; Aline Boursault ; David A. Bohan Année de publication : 2014 Article en page(s) : 615-620 Langues : Anglais (eng) Mots-clés : Capsella bursa-pastoris (L.) Medik. Viola arvensis Résumé : Carabid beetles could potentially provide a number of ecosystem services in arable fields, including the regulation of weeds by eating seeds. Spatio-temporal variability in the incidence of predation combined with a limited understanding of the interactions between carabids and seed predation, currently limits our ability to assess the effectiveness of this service. We carried out a long-term field study of carabid communities and the incidence of predation of the seeds of 5 species of weeds and laboratory cafeteria choice-tests to quantify the preferences of the most abundant species of seed-eating carabid for the seeds of 10 species of weeds. The field study revealed important temporal variation both in carabid activity-density and seed predation, with the seed of Viola arvensis and Capsella bursa-pastoris being particularly preferred by the carabids. The laboratory cafeteria tests confirmed the predation preferences measured in the field, in showing strong preferences by both Pterostichus melanarius and Pseudoophonus rufipes for the seed of V. arvensis. The percentage predation of the seed of V. arvensis was associated with the activity-density of carabids, while that of the seed of C. bursa-pastoris was not. Integrating laboratory-measured daily consumption rates, per carabid taxa, into models improved the ability to predict the intensity of predation of the seed of V. arvensis based on the composition of carabid communities. Lien pérenne : DOI : 10.14411/eje.2014.086 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=150251
in European Journal of Entomology > 111 (5) (2014) . - 615-620Petit, Sandrine (1969-), Boursault, Aline, Bohan, David A. 2014 Weed seed choice by carabid beetles (Coleoptera: Carabidae): Linking field measurements with laboratory diet assessments. European Journal of Entomology, 111(5): 615-620.Documents numériques
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Article (2014)URLContribution à la flore des vallées des Nestes (Hautes-Pyrénées) : 19e note / Michel Gruber in Le Monde des plantes, 465 (1999)
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