@article{fdi:010078071, title = {{P}lant-pollinator interactions on green roofs are mediated by substrate characteristics and plant community composition}, author = {{D}usza, {Y}. and {K}raepiel, {Y}. and {A}bbadie, {L}. and {B}arot, {S}{\'e}bastien and {C}armignac, {D}. and {D}ajoz, {I}. and {G}endreau, {E}. and {L}ata, {J}. {C}. and {M}eriguet, {J}. and {M}otard, {E}. and {R}aynaud, {X}.}, editor = {}, language = {{ENG}}, abstract = {{G}reen roofs can support pollinator communities in cities. {H}owever, little is known about the influence of green roof characteristics such as substrate and vegetation type on the abundance and diversity of attracted pollinators. {H}ere we aimed to assess how green roof design impacts their attractiveness to pollinators. {U}sing mesocosms on a rooftop in {P}aris ({F}rance), we studied the impact of two substrate types, two substrate depths (10 and 30 cm) and either monocultures or mixtures of 5 plant species on plant pollinator interactions. {I}n the case of mixtures, we also tested the effect of substrate type (natural soil vs. artificial substrate). {W}e counted the number of floral units and recorded the visits by pollinators once a week from mid-{J}une to mid-{A}ugust. {T}he pollinator assemblage visiting plant communities included 4 functional groups of pollinators: domesticated honey bees, bumble bees, solitary bees and syrphid flies. {E}ffects of treatments on pollinator community composition were variable and plant species dependent. {D}eep monoculture treatments resulted in the highest number of floral units and visits. {A}lthough plants grown on natural soil had less floral units than on artificial substrate, both treatments resulted in a similar number of visits. {T}his paper provides evidence that plant-pollinator interactions on green roofs are modulated by substrate type, substrate depth and plant community. {W}e suggest that combining plant species with diverse flowering morphologies and phenologies can enhance pollinator diversity. {W}hen possible, increasing substrate depth can result in higher levels of attractiveness.}, keywords = {{U}rban ecology ; {S}oil-plant interactions ; {P}ollination ; {S}ubstrate depth and type ; {P}lant community ; {B}iodiversity}, booktitle = {}, journal = {{A}cta {O}ecologica : {I}nternational {J}ournal of {E}cology}, volume = {105}, numero = {}, pages = {103559 [12 ]}, ISSN = {1146-609{X}}, year = {2020}, DOI = {10.1016/j.actao.2020.103559}, URL = {https://www.documentation.ird.fr/hor/fdi:010078071}, }