Drought response and urban-pollinator attractiveness of ornamental plant species
2024
Quinanzoni, Margaux | Marcolet, David | Michelot-Antalik, Alice | Laboratoire Agronomie et Environnement (LAE) ; Université de Lorraine (UL)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) | This study was a part of the project “Grand Nancy Terre de pollinisateurs” funded by the Grand Est region, regional water agencies (Rhin-Meuse, Rhˆone-Méditerranée-Corse and Seine-Normandie) and the DREAL Grand Est in the call for projects “Green and Blue Belts and Biodiversity”.
International audience
اظهر المزيد [+] اقل [-]إنجليزي. Faced with pollinator declines, cities could serve as refuges for biodiversity conservation by managing floralresources in public green spaces. Ornamental plants could play an important role in attracting pollinatorsbecause they form part of urban floral management. However, knowledge of how their floral traits respond todrought is lacking, and it is unknown whether they will be suitable for pollinators under future climates. Themain objective of this study was to determine the covariation of floral traits of ornamental plant species andeffects of drought on them. To this end, in a city greenhouse we measured floral traits of eight ornamental species commonly used in urban green spaces in France. We subjected the plants to a control treatment or a drought treatment, reducing the volume and frequency of watering. We observed interspecific variability in floral traits among these species and a change in covariation between the traits pollen quantity and nectar quantity in the drought treatment. Drought influenced morphological traits related to floral display more than other floral traits, with mean decreases of 28 % in floral height, 35 % in floral area and 58 % in the number of floral units.Ornamental plants seemed attractive to different morphotypes of pollinators depending on their floral unitnumber, nectar sugar concentration or nectar tube depth, with most visits made by Hymenoptera. These resultsare expected to encourage green-space managers to select urban plants according to their functional charac-teristics and adapt their choice of plants to climate change.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Institut national de la recherche agronomique