Effects of agriculture on evolution of native species                                                                     ...
Upcoming SlideShare
Loading in …5
×

Poster

517 views

Published on

Poster for ESA 2012 in Portland.

Published in: Technology, Self Improvement
  • Be the first to comment

Poster

  1. 1. Effects of agriculture on evolution of native species Scott A. Chamberlain1, Kenneth D. Whitney2, and Jennifer A. Rudgers2 1 Simon Fraser University, Canada – 2 Rice University, USA The Idea What did we find? What did we find?...•  Agriculture covers ~50% of vegetated land surface Predictions Results 4. Contribution of mutualists and antagonists to•  Evolution is altered in agricultural landscapes selection on native plant floral traits? –  Gene flow occurs from crops to wild relative plants Does proximity to crops alter: –  Evolution of resistance occurs in plants to GMOs 1. Abundance of mutualists and antagonists? –  Evolution of plants and insect pests in response to Visits inflorescence-1 herbicides and peseticides Abundance•  Yet, we know less of how natural selection is altered min-1 in agricultural landscapes through species interactions•  Much evidence for altered biotic communities Far Near•  How do changes in abundance and community structure of mutualists and antagonists near sunflower crops Abundance alter natural selection on flower traits in wild sunflowers Far Near The QuestionsDoes proximity to crops alter: 2. Community structure of mutualists and antagonists?1. Abundance of mutualists and antagonists?2. Community structure of mutualists and antagonists?3. Selection on native plant floral traits? What does it mean4. Contribution of mutualists and antagonists to Conclusions selection on native plant floral traits? •  Sunflower mutualists more abundant near, antagonists more abundant far from crops The Approach No difference for antagonists •  Beta-diversity of mutualists greater near crops Natural habitat •  Natural selection altered by proximity to sunflower Agricultural crops Other Crop landscape [corn/sorghum/ •  Changes in mutualist/antagonist communities drive wheat/cotton] differences in selection near vs. far from crops Distance Far ~ 2.5 km 3. Selection on native plant floral traits? •  This is one of few studies to show agricultural effects on natural selection across a landscape in a native plant species Sunflower Crop Distance Implications Near ≤ 10 m •  Mutualist-antagonist framework may be useful in Proximity to sunflowers (2 levels) understanding agricultural effects on plant evolution X Seed source (2 levels) •  Natural selection altered in agricultural landscapes, BUT contrary to expectation @ 5 sites in ‘10, @ 2 sites in ‘11Data Collected•  Pollinators: pollinator observations Scott Chamberlain•  Seed predators: counted damaged seeds scott.sfu@gmail.com - @recology_ QR Code•  Folivores: leaf damage http://schamberlain.github.com/scott here

×