2018 ESA Annual Meeting (August 5 -- 10)

OOS 34 - Pollen Limitation in a Changing World: How Does Environmental Variation Influence Plant Reproduction?

Thursday, August 9, 2018: 1:30 PM-5:00 PM
344, New Orleans Ernest N. Morial Convention Center
Organizer:
Jean H. Burns
Co-organizers:
Joanne Bennett and Janette A. Steets
Moderator:
Anna Ósvaldsson
Plant reproduction plays an important role in population dynamics, and many plants rely on pollinator services for at least some of their reproduction. Recent pollinator population declines, coupled with other environmental changes including land use change and biological invasions, may have drastically changed pollinator services. This session follows the 2016 release of the IPBES synthetic report on the state of our knowledge on the causes and consequences of global pollinator declines (Potts et al. 2016). The report highlighted that we still do not have a synthetic understanding of how pollinator declines will affect plant pollination success and identified research that this area as a key knowledge gap. Pollen supplementation experiments, which compare the reproductive success of open and pollen supplemented flowers, quantify how limited plant reproduction might be by pollen receipt. Recent global meta-analyses and longitudinal studies are generating new insights into important long-standing questions, such as: How resilient is plant reproduction to environmental changes, such as land use change? How do extreme events such as drought influence pollen limitation? Do pollinator services limit reproduction for invasive plants? It is still largely unknown what plant characteristics lead to resilience or vulnerability to changing climates, and the studies in this session will address this question using phylogenetic meta-analysis and other cutting edge analytical techniques. Such studies are increasingly important as changes in pollinator populations, urbanization, and extreme weather events such as drought potentially influence plant reproduction.
1:30 PM Cancelled
OOS 34-1
1:50 PM
Global patterns of pollen limitation in wild plants
Tiffany Knight, Martin Luther University Halle-Wittenberg; Tia-Lynn Ashman, University of Pittsburgh; Joanne Bennett, German Centre for Integrative Biodiversity Research (iDiv); Janette A. Steets, Oklahoma State University
2:50 PM
Mating system evolution under strong pollen limitation: Evidence of disruptive selection through male and female fitness in Clarkia xantiana
Ryan D. Briscoe Runquist, University of Minnesota; David A. Moeller, University of Minnesota
3:10 PM
3:40 PM
Linking pollinator efficiency with rangewide patterns of pollen limitation: Small bees exploit the plant-pollinator mutualism
Matthew H. Koski, University of Virginia; Jennifer L. Ison, University of Illinois at Chicago; Ashley Padilla, College of Wooster; Laura F. Galloway, University of Virginia
4:20 PM
Temporal variation in pollen limitation among individual subalpine plants
Amy Iler, Chicago Botanic Garden; Rachel Tsong, University of Arizona
4:40 PM
What pollen limitation can tells about plant community assembly processes in a changing world
Marina Wolowski, Federal University of Alfenas; Leandro Freitas, Botanical Garden of Rio de Janeiro