Variations in carbon isotope ratios of plants across a temperature gradient along the 400 mm isoline of mean annual precipitation in north China and their relevance to paleovegetation reconstruction

Wang, Guoan; Li, Jiazhu; Liu, Xianzhao; Li, Xiaoyun

doi:10.1016/j.quascirev.2012.12.004

Cited by 104 publications

(70 citation statements)

References 64 publications

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“…To explore the clear relationship between δ 13 C shell and temperature, we narrowed down the study sites by determining those with MAP in the range of 450–550 mm. A positive correlation was then found between δ 13 C shell of Bradybaena and MAT for these selected sites, with a slope of approximately 0.13‰/°C (Figure S9a), which is comparable to the results obtained by Wang et al () and thus indicates that carbon isotopes have a similar sensitivity to temperature. However, there was no positive relationship between δ 13 C shell of Cathaica and MAT, which is possibly because of the smaller temperature gradient (about 5 °C) at the study sites (Figure S9b).…”

Section: Discussionsupporting

confidence: 87%

Stable Carbon and Oxygen Isotopes in Shell Carbonates of modern Land Snails in China and Their Relation to Environment Variables

et al. 2019

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Stable isotopes of land snail fossil shell carbonates (δ 13 C shell and δ 18 O shell ) provide the opportunity to decipher paleodietary and paleoenvironmental changes. However, the environmental meanings of δ 13 C shell and δ 18 O shell remain elusive especially in the monsoonal climate region. To elucidate this, δ 13 C shell and δ 18 O shell of the two most common land snails in China, Cathaica and Bradybaena, were analyzed in this study. Results show that Bradybaena has a wider distribution than Cathaica and provides considerable potential for use in paleoenvironmental reconstruction. In addition, δ 13 C shell of Bradybaena increases with altitude and temperature, decreases with mean annual precipitation, and reflects the isotopic signal of C 3 plants. In contrast, Cathaica δ 13 C shell documents a C 3 /C 4 mixing signal and exhibits only a strong altitude effect. δ 18 O shell of Bradybaena decreases with mean annual precipitation in the Indian monsoon and westerlies regions but increases with mean annual temperature in the East Asian monsoon region; as a strong correlation exists between the two variables, they could thus potentially be used to reconstruct paleotemperatures. However, uncertainties should be recognized due to the complexity of the land-snails' ecophysiological responses to environmental changes. Cathaica has slightly lower δ 18 O shell than Bradybaena, which suggests that the two land snails have different ecophysiological traits, and the δ 18 O shell of Cathaica follows mean annual temperature in northeast China. This study lays a ground for explaining land snail stable isotopes in paleorecord in China and reasserts the importance of different ecophysiological traits of land snails in paleoclimatic research.

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Section: Discussionsupporting

confidence: 87%

Stable Carbon and Oxygen Isotopes in Shell Carbonates of modern Land Snails in China and Their Relation to Environment Variables

et al. 2019

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“…A growth chamber experiment that included five C 4 plant species found a slight decrease in δ 13 C value with increasing temperature . Others have observed no trends in δ 13 C values with temperature or a non‐significant negative correlation . It is interesting, therefore, that temperature and P. glaucum seed δ 13 C values are so strongly and significantly negatively correlated in our study.…”

Section: Discussionsupporting

confidence: 39%

Carbon and nitrogen isotope variability in the seeds of two African millet species: Pennisetum glaucum and Eleusine coracana

Reid

Lalk

Marshall

et al. 2018

Rapid Comm Mass Spectrometry

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The importance of both temperature and precipitation as predictors of δ C and δ N values in millets suggests that C plants may be more sensitive to environmental parameters than previously appreciated. Given the high degree of carbon and nitrogen isotope variability among accessions of these species, it is imperative that site-relevant plant isotope ratios are used for making isotope-based paleo-dietary predictions.

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“…The horizontal dashed and dotted line represent the C5Cn/C5Br geomagnetic reversal dated at 15.97 Ma [37]. The vertical dashed line is the mean value of each parameter for the complete sedimentary succession conditions, such as temperature [52,53] and precipitation [54,55]. The controlling climatic factor depends on which one limits plant growth [54].…”

Section: Environmental Significance Of Geochemical Proxiesmentioning

confidence: 99%

Lake geochemistry reveals marked environmental change in Southwest China during the Mid Miocene Climatic Optimum

Lebreton-Anberrée

et al. 2016

Science Bulletin

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The Mid-Miocene Climatic Optimum (MMCO; *15-17 Ma) was one of the short-term climatic warm events that punctuated the Cenozoic long-term cooling trend. Because there are very few terrestrial records of this event, most of our understanding comes from marine cores. In this report, we first present new palaeomagnetic data that revises the dating of our 400 m-thick lacustrine section in Wenshan (Yunnan), previously thought to be Late Miocene. These new data suggest an older age, ca. 15.2-16.5 Ma, coinciding with the MMCO. We measured d 13 C on bulk organic matter (d 13 C org ), total organic carbon (TOC), total nitrogen (TN) and C/N ratios at a high sample resolution to: (1) reconstruct the palaeoenvironmental changes in the lake catchment area, and (2) infer mechanisms responsible for these changes. Our results show that all four geochemical parameters demonstrate that a strong environmental change occurred around the middle of the section, shortly after the C5Cn/C5Br geomagnetic reversal and the Early/Middle Miocene boundary at 15.97 Ma. We propose that the environmental shift may be due to a combination of a change in climate, which became cooler, together with a change in organic matter cycling within the lake. This study provides a new insight into the MMCO and demonstrates that although the MMCO was generally a warm event, it was also a time of climatic instability and abrupt environmental changes.Keywords Yunnan Á Mid-Miocene Climatic Optimum Á Bulk organic carbon isotopes (d 13 C org ) Á C/N ratio Á TOC Electronic supplementary material The online version of this article

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Variations in carbon isotope ratios of plants across a temperature gradient along the 400 mm isoline of mean annual precipitation in north China and their relevance to paleovegetation reconstruction

Cited by 104 publications

References 64 publications

Stable Carbon and Oxygen Isotopes in Shell Carbonates of modern Land Snails in China and Their Relation to Environment Variables

Stable Carbon and Oxygen Isotopes in Shell Carbonates of modern Land Snails in China and Their Relation to Environment Variables

Carbon and nitrogen isotope variability in the seeds of two African millet species: Pennisetum glaucum and Eleusine coracana

Lake geochemistry reveals marked environmental change in Southwest China during the Mid Miocene Climatic Optimum

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