Ecological interactions affecting the evolutionof plant mating systems: Current research and future directions
Ashman, Tia-Lynn .
Ecological consequences and evolutionary responses tomembership in diverse flowering communities.
Most plants live in multi-species communities and more often than not share pollinators. The diversity of the community can be especially high in biodiversity hotspots and in these areas pollen limitation of plant reproduction seems especially strong,perhaps as a consequence of the effects of pollinator sharing. In this talk, I explore the consequences of co-flowering from ecological and evolutionary perspectives.Using new data collected from serpentine seep communities in California, and dolomite outcrop communities in Spain, and data gleaned from published literature,I seek to answer to several questions: 1) How does site diversity translate into co-flowering diversity? 2) How extensive is pollinator sharing among coflowering plants and how is per-capita visitation affected by diversity? 3) What is the pattern of heterospecific pollen receipt among flowers within species and among community members? 4) What explains the variation in heterospecific pollen receipt? 5) What is the effect of heterospecific pollen receipt on female reproductive success and how can we explain the variation in its severity? 4) What are the possible evolutionary trajectories for plants confronted with negative effects of heterospecific pollen? Do we see evidence for these? In exploring these questions, I expose areas where our understanding falls short and reveal topics in need of additional work.
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1 - University Of Pittsburgh, Department Of Biological Sciences, 4249 Fifth Avenue & Ruskin, Pittsburgh, PA, 15260, USA
Presentation Type: Symposium or Colloquium Presentation
Location: Delaware D/Hyatt
Date: Tuesday, July 10th, 2012
Time: 4:05 PM