Species interactions in a changing environment: Elevated CO2 alters the ecological and potential evolutionary consequences of competition

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Species interactions in a changing environment: Elevated CO2 alters the ecological and potential evolutionary consequences of competition

Authors

Lau, Ja

Shaw, R G

Reich, Peter B

Tiffin, P

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2010

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Evolutionary Ecology

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Article

Abstract

Question: How will global changes impact the ecological and evolutionary outcomes of competition? Hypothesis: Global changes that alter resource availability, such as rising atmospheric carbon dioxide (CO2) concentrations, will alter the effects of competition on mean fitness and patterns of natural selection. Because species exhibit different growth responses to elevated CO2 and because different traits may aid in competition against different taxa. these ecological and evolutionary effects may depend on the Identity of the competitor Organism: Arabidopsis thaliana grown under intraspecific competition or interspecific competition with the C3 grass Biomus inermis or the C4 grass Andropogon gerardu Field site: BioCON (Biodiversity, CO2, and Nitrogen) experiment at Cedar Creek Ecosystem Science Reserve. Minnesota, USA Methods: Manipulate the presence and type of competition experienced by A thaliana populations growing under ambient or elevated CO2 conditions. Measure the interactive effects of CO2 and competition on mean fitness and on patterns of natural selection Conclusions: Elevated CO2 reduces the effects of competition on mean fitness, alters the relative fitness effects of different competition treatments, and minimizes the strength of competition as a selective agent

Keywords

carbon dioxide

competition

effect size

global change

indirect effect

natural selection

resource availability

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Previously Published Citation

Lau, Jennifer A. A., Peter G. Tiffin, Ruth G. B. Shaw, and Peter B. Reich. "Species Interactions in a Changing Environment: Elevated CO 2 Alters the Ecological and Potential Evolutionary Consequences of Competition." Evolutionary Ecology Research 12.4 (2010): 435-55.

Suggested citation

Lau, Ja; Shaw, R G; Reich, Peter B; Tiffin, P. (2010). Species interactions in a changing environment: Elevated CO2 alters the ecological and potential evolutionary consequences of competition. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/176817.

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