Using a phytoplankton growth model to predict the fractionation of stable carbon isotopes
Using a phytoplankton growth model to predict the fractionation of stable carbon isotopes
复制标题
使用浮游植物生长模型来预测稳定碳同位素的分馏
DOI：
--
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
J. Mcglade
中科院分区：
文献类型：
--
作者：
M. Baird;S. Emsley;J. Mcglade
在本期的前一篇论文中，重新推导了一个基于化学动力学类比的浮游植物生长模型（CR模型），并与从温带湖泊中提取的养殖浮游植物群落的生长速率进行了比较。本文通过对CR模型的进一步推导，得到了与Rau等人（Afar Ecol. Prog.夫人，133，275-285，1996）。CR和Rau等人的模型都与浮游植物生长过程中同位素分馏的观察结果相一致，即δ（p）与生长速率μ除以胞外碳浓度C成正比。CR模型，然后用来解释的观察，即初始斜率的碳（p）除以亩/C是一个负的线性函数的细胞碳表面积比的浮游植物细胞。CR模型应用相同的模型框架来预测浮游植物生长和稳定同位素分馏。CR模型预测两个可测量现象的能力增加了它的有用性，也增加了我们对其预测能力的信心。
In the preceding paper in this issue, a phytoplankton growth model based on an analogy with chemical kinetics (the CR model) was re-derived, and a comparison made with the growth rate of cultured phytoplankton assemblages extracted from temperate lakes. In this paper, further derivation of the CR model leads to the same model of carbon isotope fractionation used by Rau et al. (Afar Ecol. Prog. Ser., 133, 275-285, 1996). Both the CR and Rau et al. models are compatible with the observation that isotope fractionation during phytoplankton growth, epsilon (p), is proportional to the growth rate, mu, divided by the extracellular carbon concentration, C. The CR model is then used to explain the observation that the initial slope of epsilon (p) divided by mu /C is a negative linear function of the cellular carbon to surface area ratio of the phytoplankton cell. The CR model applies the same model framework to predict both phytoplankton growth and stable isotope fractionation. The ability of the CR model to predict two measurable phenomena increases its usefulness, and also our confidence in its predictive capabilities.