Abstract Detail

Molecular Ecology and Evolution

Schroyer, Tina [1], Thompson, Pam [1], Cruzan, Mitch [2].

How do invasive plants move? The case of Brachypodium sylvaticum.

Global exchange and establishment of exotic species is occurring at an unprecedented rate. A small subset of exotic species become aggressively invasive and obliterate native ecosystems. To become invasive, an introduced species must be able to adapt rapidly to novel environmental conditions. Such adaptation may be hampered by reduced genetic diversity resulting from genetic bottlenecks that frequently accompany introduction. After successful colonization of a new area, gene flow from nearby populations may provide the necessary genetic diversity and phenotypic variation required for populations to respond to selection and to continue expanding into new environments. Conversely, excessive gene flow between populations in different environments could swamp beneficial mutations and prevent improvement of the invasive genotype. Spatially heterogeneous gene flow generates a genetic structure which exists not only as a record of an invasive species’ past, but as a signpost indicating its evolutionary future. However, it is not understood how elements of the suburban landscape affect gene flow; this proves problematic for our understanding of the evolution of invasive species, as a significant number of invaders exist in the suburban landscape. To improve our understanding, I have investigated the influence of suburban landscape features on gene flow and genetic differentiation in slender false brome (Brachypodium sylvaticum), a model species for invasive plant evolution.

1 - Portland State University, Biology, 1719 SW 10th Avenue, SRTC rm 246, Portland, OR, 97201, USA
2 - Portland State University, Department Of Biology, PO BOX 751, PORTLAND, OR, 97207, USA

Keywords:
Isolation by Resistance
population genetics
local adaptation
range expansion.

Presentation Type: Poster
Session: P, Molecular Ecology & Evolution Posters
Location: Exhibit Hall/Savannah International Trade and Convention Center
Date: Monday, August 1st, 2016
Time: 5:30 PM This poster will be presented at 5:30 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PML003
Abstract ID:424
Candidate for Awards:None