Shifts in water availability mediate plant-pollinator interactions

The New Phytologist
M Kate Gallagher, Diane R Campbell

Abstract

Altered precipitation patterns associated with anthropogenic climate change are expected to have many effects on plants and insect pollinators, but it is unknown if effects on pollination are mediated by changes in water availability. We tested the hypothesis that impacts of climate on plant-pollinator interactions operate through changes in water availability, and specifically that such effects occur through alteration of floral attractants. We manipulated water availability in two naturally occurring Mertensia ciliata (Boraginaceae) populations using water addition, water reduction and control plots and measured effects on vegetative and floral traits, pollinator visitation and seed set. While most floral trait values, including corolla size and nectar, increased linearly with increasing water availability, in this bumblebee-pollinated species, pollinator visitation peaked at intermediate water levels. Visitation also peaked at an intermediate corolla length, while its relationship to corolla width varied across sites. Seed set, however, increased linearly with water. These results demonstrate the potential for changes in water availability to impact plant-pollinator interactions through pollinator responses to differences in...Continue Reading

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Citations

Apr 14, 2018·Global Change Biology·Benjamin B PhillipsJuliet L Osborne
Oct 27, 2018·Annals of Botany·Diane R CampbellRobert A Raguso
Jul 23, 2020·The New Phytologist·Adam B RoddyFernando A O Silveira
Feb 23, 2020·American Journal of Botany·Sevan S SuniRobin Hopkins
Feb 23, 2020·American Journal of Botany·M Kate Gallagher, Diane R Campbell
Oct 7, 2020·Journal of Insect Science·Erin E Wilson RankinGiselle E Lozano
Jan 13, 2021·Global Change Biology·Melanie KammererChristina M Grozinger
Jan 25, 2021·The Science of the Total Environment·Alessandro FilazzolaJ Scott MacIvor
Feb 2, 2021·Frontiers in Plant Science·Rebecca J HöferJonas Kuppler
Mar 28, 2021·Current Opinion in Insect Science·Mayra C VidalKari A Segraves
Mar 29, 2021·Global Change Biology·Jonas Kuppler, Martyna M Kotowska
Jun 24, 2021·The Journal of Experimental Biology·Michael J M HarrapSean A Rands
Jul 29, 2021·Proceedings. Biological Sciences·Jacob M Cecala, Erin E Wilson Rankin
Sep 29, 2021·Global Change Biology·John M PowersDiane R Campbell

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