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the claim

Causality between past CO2 levels and fossilized plant stomata is established through controlled calibration experiments

the verdict
SUPPORTED
the evidence backs this
Recorded sources
2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that causality between past CO2 levels and fossilized plant stomata is established through controlled calibration experiments?

Yes. Controlled calibration experiments growing plants under varying carbon dioxide concentrations have established the physiological link and inverse relationship between atmospheric CO2 levels and fossilized plant stomatal frequency.

Verdict: SUPPORTED · 2 sources for, 0 against · Last checked

The analysis

The claim states that causality between past CO2 levels and fossilized plant stomata is established through controlled calibration experiments. Papers 1 and 6 both provide direct evidence that this relationship has been tested and demonstrated experimentally using controlled chambers or growth environments, supporting the assertion without any refuting evidence in the retrieved sources.

Evidence for · 2
Do fossil plants signal palaeoatmospheric carbon dioxide concentration in the geological past?
1998
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McElwain, J. C. (1998). Do fossil plants signal palaeoatmospheric carbon dioxide concentration in the geological past?. Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 353(1365), 83-96. https://doi.org/10.1098/rstb.1998.0193

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More for · 1
Stomatal frequency of Quercus glauca from three material sources shows the same inverse response to atmospheric pCO2.
2019
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JJ, H., YW, X., T, S., YJ, H., & ZK, Z. (2019). Stomatal frequency of Quercus glauca from three material sources shows the same inverse response to atmospheric pCO2.. doi.org. https://doi.org/10.1093/aob/mcz020

Receipt History
first checked04 Aug 2026
judged → SUPPORTED · 8404 Aug 2026
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