Stomatal density and stomatal index as indicators of paleoatmospheric CO2 concentration,Review of Palaeobotany and Palynology

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Stomatal density and stomatal index as indicators of paleoatmospheric CO2 concentration
Review of Palaeobotany and Palynology ( IF 1.7 ) Pub Date : 2001-03-01 , DOI: 10.1016/s0034-6667(00)00074-9
D L. Royer ₁

Affiliation

A growing number of studies use the plant species-specific inverse relationship between atmospheric CO(2) concentration and stomatal density (SD) or stomatal index (SI) as a proxy for paleo-CO(2) levels. A total of 285 previously published SD and 145 SI responses to variable CO(2) concentrations from a pool of 176 C(3) plant species are analyzed here to test the reliability of this method. The percentage of responses inversely responding to CO(2) rises from 40 and 36% (for SD and SI, respectively) in experimental studies to 88 and 94% (for SD and SI, respectively) in fossil studies. The inconsistent experimental responses verify previous concerns involving this method, however the high percentage of fossil responses showing an inverse relationship clearly validates the method when applied over time scales of similar length. Furthermore, for all groups of observations, a positive relationship between CO(2) and SD/SI is found in only

中文翻译：

气孔密度和气孔指数作为古大气 CO2 浓度的指标

越来越多的研究使用大气 CO(2) 浓度和气孔密度 (SD) 或气孔指数 (SI) 之间植物物种特定的反比关系作为古 CO(2) 水平的代理。在这里分析了总共 285 个先前发布的 SD 和 145 SI 对可变 CO(2) 浓度从 176 C(3) 植物物种池的响应，以测试此方法的可靠性。在化石研究中，对 CO(2) 作出相反反应的反应百分比从实验研究中的 40% 和 36%（分别为 SD 和 SI）上升到 88% 和 94%（分别为 SD 和 SI）。不一致的实验响应证实了先前涉及该方法的担忧，但是当应用于相似长度的时间尺度时，显示出反向关系的化石响应的高百分比清楚地验证了该方法。此外，

更新日期：2001-03-01

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