Heschel , M. Shane , Bowen, C. , Evankow, A. , Bibee, K. , Grosscup, V. , Gibson, J. .
Disturbance, physiological performance, and fitness of Tamarix. .
Water relations in riparian systems of the southwestern United States can influence plant community structure. Water use has been examined in relation to Tamarix, Populus, and Salix abundance and distribution; however, the strength of selection on transpiration rates and stomatal conductance has rarely been investigated in this system. Here, we measured stomatal conductance and reproductive fitness of Tamarix ramosissima plants of different ages in an open sandbar habitat in southeastern Colorado. We also performed selection analyses to quantify direct and indirect sources of natural selection on water use in Tamarix. We detected weak and inconsistent selection on stomatal conductance across two seasons indicating that water use might not have a strong role in fecundity and community interactions.
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1 - Colorado College, Biology, 14 E. Cache La Poudre St., Colorado Springs, CO, 80903, USA
2 - Colorado College, Biology
Presentation Type: Poster:Posters for Topics
Location: Khorassan Ballroom/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 5:30 PM