Funded by UT Undergraduate Research Office (Summer Research Internship to L. B.) UT Science Alliance Program (Junior Directed Research and Development to A. T. C.) American Fellowship from AAUW (to L. S.).
Within and between population variation in plant traits predicts ecosystem functions associated with a dominant plant species
Article first published online: 3 MAY 2012
© 2011 The Authors. MicrobiologyOpen published by Blackwell Publishing Ltd.
This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Ecology and Evolution
Volume 2, Issue 6, pages 1151–1161, June 2012
How to Cite
Breza, L. C., Souza, L., Sanders, N. J. and Classen, A. T. (2012), Within and between population variation in plant traits predicts ecosystem functions associated with a dominant plant species. Ecology and Evolution, 2: 1151–1161. doi: 10.1002/ece3.223
- Issue published online: 12 JUN 2012
- Article first published online: 3 MAY 2012
- Received: 22 November 2011; Revised: 24 January 2012; Accepted: 6 February 2012
- Aboveground biomass;
- inflorescence mass;
- intraspecific variation;
- net ecosystem carbon exchange;
- Solidago altissima
Linking intraspecific variation in plant traits to ecosystem carbon uptake may allow us to better predict how shift in populations shape ecosystem function. We investigated whether plant populations of a dominant old-field plant species (Solidago altissima) differed in carbon dynamics and if variation in plant traits among genotypes and between populations predicted carbon dynamics. We established a common garden experiment with 35 genotypes from three populations of S. altissima from either Tennessee (southern populations) or Connecticut (northern populations) to ask whether: (1) southern and northern Solidago populations will differ in aboveground productivity, leaf area, flowering time and duration, and whole ecosystem carbon uptake, (2) intraspecific trait variation (growth and reproduction) will be related to intraspecific variation in gross ecosystem CO2 exchange (GEE) and net ecosystem CO2 exchange (NEE) within and between northern and southern populations. GEE and NEE were 4.8× and 2× greater in southern relative to northern populations. Moreover, southern populations produced 13× more aboveground biomass and 1.4× more inflorescence mass than did northern populations. Flowering dynamics (first- and last-day flowering and flowering duration) varied significantly among genotypes in both the southern and northern populations, but plant performance and ecosystem function did not. Both productivity and inflorescence mass predicted NEE and GEE between S. altissima southern and northern populations. Taken together, our data demonstrate that variation between S. altissima populations in performance and flowering traits are strong predictors of ecosystem function in a dominant old-field species and suggest that populations of the same species might differ substantially in their response to environmental perturbations.