C 3 plant carbon isotope discrimination does not respond to CO 2 concentration on decadal to centennial timescales
C 3 plant carbon isotope discrimination does not respond to CO 2 concentration on decadal to centennial timescales
复制标题
C 3 植物碳同位素辨别对十年到百年时间尺度上的 CO 2 浓度没有反应
DOI：
10.1111/nph.17030
复制
发表时间：
2020
期刊：
影响因子：
9.4
通讯作者：
Smith, Selena Y.
中科院分区：
文献类型：
--
作者：
Stein, Rebekah A.;Sheldon, Nathan D.;Smith, Selena Y.
植物碳同位素识别是复杂的，可能受到气候、进化和/或土壤因素的驱动。我们测试了现代和历史植物化学中碳同位素歧视的气候驱动因素，并特别关注工业化时期[CO2]上升与碳同位素歧视之间的关系。为了测试植物在过去200年里对气候和大气变化的响应，我们对博物馆标本（包括油松、侧柏、白杨、红松、西柏、白杨、标准白杨和苏川白杨）进行了时间序列的碳同位素记录。我们将结果与广泛的c3植物的荟萃分析结合起来，对不同植物类型的碳同位素判别和值的分布进行了全面的研究。研究表明，气候变量（如年平均降水量、温度以及本研究的关键因素大气中的二氧化碳）不会驱动碳同位素的区分。植物同位素识别是每个分类单元固有的特征，可以定量地将系统发育关系和对气候的适应联系起来，并从生态到地质的时间尺度上联系起来。
Plant carbon isotope discrimination is complex, and could be driven by climate, evolution and/or edaphic factors. We tested the climate drivers of carbon isotope discrimination in modern and historical plant chemistry, and focus in particular on the relationship between rising [CO2] over Industrialization and carbon isotope discrimination.We generated temporal records of plant carbon isotopes from museum specimens collected over a climo‐sequence to test plant responses to climate and atmospheric change over the past 200 yr (includingPinus strobus,Platycladus orientalis,Populus tremuloides,Thuja koraiensis,Thuja occidentalis,Thuja plicata,Thuja standishiiandThuja sutchuenensis). We aggregated our results with a meta‐analysis of a wide range of C3plants to make a comprehensive study of the distribution of carbon isotope discrimination and values among different plant types.We show that climate variables (e.g. mean annual precipitation, temperature and, key to this study, CO2in the atmosphere) do not drive carbon isotope discrimination.Plant isotope discrimination is intrinsic to each taxon, and could link phylogenetic relationships and adaptation to climate quantitatively and over ecological to geological time scales.