Contemporary evolution of an invasive grass in response to elevated atmospheric CO2 at a Mojave Desert FACE site
Abstract
Elevated atmospheric CO2 has been shown to rapidly alter plant physiology and ecosystem productivity, but contemporary evolutionary responses to increased CO2 have yet to be demonstrated in the field. At a Mojave Desert FACE (free-air CO2 enrichment) facility, we tested whether an annual grass weed (Bromus madritensis ssp. rubens) has evolved in response to elevated atmospheric CO2. Within 7 years, field populations exposed to elevated CO2 evolved lower rates of leaf stomatal conductance; a physiological adaptation known to conserve water in other desert or water-limited ecosystems. Evolution of lower conductance was accompanied by reduced plasticity in upregulating conductance when CO2 was more limiting; this reduction in conductance plasticity suggests that genetic assimilation may be ongoing. Reproductive fitness costs associated with this reduction in phenotypic plasticity were demonstrated under ambient levels of CO2. Our findings suggest that contemporary evolution may facilitate this invasive species’ spread in this desert ecosystem.
- Authors:
-
- The Nature Conservancy, Sacramento CA (United States)
- Univ. of California, Davis, CA (United States). Dept. of Plant Sciences
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER). Earth and Environmental Systems Science Division; USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1625867
- Grant/Contract Number:
- FC002-91ER5667
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Ecology Letters
- Additional Journal Information:
- Journal Volume: 17; Journal Issue: 6; Journal ID: ISSN 1461-023X
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; environmental sciences & ecology; Bromus rubens; contemporary evolution; desert ecosystem; elevated atmospheric CO2; genetic assimilation; invasive species; norms of reaction; phenotypic plasticity; stomatal conductance
Citation Formats
Grossman, Judah D., and Rice, Kevin J. Contemporary evolution of an invasive grass in response to elevated atmospheric CO2 at a Mojave Desert FACE site. United States: N. p., 2014.
Web. doi:10.1111/ele.12274.
Grossman, Judah D., & Rice, Kevin J. Contemporary evolution of an invasive grass in response to elevated atmospheric CO2 at a Mojave Desert FACE site. United States. https://doi.org/10.1111/ele.12274
Grossman, Judah D., and Rice, Kevin J. Wed .
"Contemporary evolution of an invasive grass in response to elevated atmospheric CO2 at a Mojave Desert FACE site". United States. https://doi.org/10.1111/ele.12274. https://www.osti.gov/servlets/purl/1625867.
@article{osti_1625867,
title = {Contemporary evolution of an invasive grass in response to elevated atmospheric CO2 at a Mojave Desert FACE site},
author = {Grossman, Judah D. and Rice, Kevin J.},
abstractNote = {Elevated atmospheric CO2 has been shown to rapidly alter plant physiology and ecosystem productivity, but contemporary evolutionary responses to increased CO2 have yet to be demonstrated in the field. At a Mojave Desert FACE (free-air CO2 enrichment) facility, we tested whether an annual grass weed (Bromus madritensis ssp. rubens) has evolved in response to elevated atmospheric CO2. Within 7 years, field populations exposed to elevated CO2 evolved lower rates of leaf stomatal conductance; a physiological adaptation known to conserve water in other desert or water-limited ecosystems. Evolution of lower conductance was accompanied by reduced plasticity in upregulating conductance when CO2 was more limiting; this reduction in conductance plasticity suggests that genetic assimilation may be ongoing. Reproductive fitness costs associated with this reduction in phenotypic plasticity were demonstrated under ambient levels of CO2. Our findings suggest that contemporary evolution may facilitate this invasive species’ spread in this desert ecosystem.},
doi = {10.1111/ele.12274},
journal = {Ecology Letters},
number = 6,
volume = 17,
place = {United States},
year = {Wed Mar 26 00:00:00 EDT 2014},
month = {Wed Mar 26 00:00:00 EDT 2014}
}
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