Late Miocene vegetation dynamics under monsoonal climate in southwestern China

Li, Shufeng; Mao, Limi; Spicer, Robert A.; Lebreton-Anberrée, Julie; Su, Tao; Mei, Shunliang; Zhou, Zhe‐Kun

doi:10.1016/j.palaeo.2015.02.030

Cited by 57 publications

(29 citation statements)

References 59 publications

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“…Terrestrial plants using the CAM photosynthetic pathway (crassulacean acid metabolism) have d 13 C org values ranging from -10 % to -20 %. However, CAM plants, which are mainly desert plants and succulents [51], are unlikely to contribute significantly to the d 13 C org signal in a monsoonal climate such as Wenshan [11]. In Wenshan, the average of d 13 C org values is -28.9 % ( Table 1) and implies that C 4 plants did not contribute significantly to the biomass preserved in the lake (Fig.…”

Section: Environmental Significance Of Geochemical Proxiesmentioning

confidence: 99%

“…Therefore, high d 13 C org values might reflect high primary productivity or low carbon cycling, or a combination of both. Finally, the d 13 C org values can reflect changes in the concentration of atmospheric CO 2 [35] and climatic [11] (e, f, g and h) of the palaeo-lake in Wenshan. For the full list of pollen taxa, see Table S1, online.…”

Section: Environmental Significance Of Geochemical Proxiesmentioning

confidence: 99%

“…In Wenshan, however, because organic matter originated from terrestrial as well as aquatic plants, d 13 C org is more likely to be related to temperature than precipitation. To better understand the climatic factors influencing d 13 C org , we compared our geochemical results with previously published palynological results from the same section [11]. We assessed possible correlations between the geochemical parameters and the palynological taxa grouped by ecological preferences (see online Table S1 for the full list of woody pollen taxa).…”

Section: Environmental Significance Of Geochemical Proxiesmentioning

confidence: 99%

“…In Yunnan (southwest China), the evolution of the Miocene climate has been extensively investigated using different floral proxies, such as pollen [11,12] and plant mega-fossils [13][14][15][16][17], indicating that Yunnan was already under a monsoonal climate in the Miocene [11,14]. We have previously reported palynological results from a 400 m-thick sedimentary succession in Wenshan, southeast Yunnan, to reveal how the vegetation dynamics responded to a monsoonal climate [11].…”

Section: Introductionmentioning

confidence: 99%

“…We have previously reported palynological results from a 400 m-thick sedimentary succession in Wenshan, southeast Yunnan, to reveal how the vegetation dynamics responded to a monsoonal climate [11]. Lakes are environmentally sensitive and so are ideal to study past climatic fluctuations [18].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Environmental Significance Of Geochemical Proxiesmentioning

confidence: 99%

Section: Environmental Significance Of Geochemical Proxiesmentioning

confidence: 99%

Section: Environmental Significance Of Geochemical Proxiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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New Fagaceous pollen taxa from the Miocene Søby flora of Denmark and their biogeographic implications

Denk

Bouchal

2021

American J of Botany

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The Fagaceae comprise around 1000 tree species in the Northern Hemisphere. Despite an extensive fossil pollen record, reconstructing biogeographic patterns is hampered because it is difficult to achieve good taxonomic resolution with light microscopy alone. We investigate dispersed pollen of Fagaceae from the Miocene Søby flora, Denmark. We explore the latitudinal gradient in Fagaceae distribution during the Miocene Climatic Optimum (MCO) in Europe and the Northern Hemisphere to compare it with the Eocene Warmhouse and the present. Methods: We investigated dispersed pollen using light and scanning electron microscopy. We assessed biogeographic patterns in Fagaceae during two warm periods in Earth history (MCO, Eocene) and the present. Results: Eight species of Fagaceae were recognized in the Søby flora. Of these, Fagus had a continuous Mediterranean to subarctic distribution during MCO; Quercus sect. Cerris and castaneoids had northern limits in Denmark, and evergreen Quercus sect. Ilex in Central Europe. In a northern hemispheric context, Fagus and sections of Quercus had more northerly distribution limits during Eocene and MCO with maximum northward extensions during Eocene (Fagus, castaneoids) or Oligo-Miocene (Quercus sects. Cerris and Ilex). The known distribution of the extinct Tricolporopollenites theacoides during MCO included Central Europe and East China, while this taxon thrived in South China during Eocene. Conclusions: More northerly distributions during MCO and Eocene probably were determined by temperature. In contrast, fossil occurrences in areas that are arid or semi-humid today were determined by maritime conditions in these areas (western North America, Central Asia) during the Cenozoic.

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Fossil leaves of Berhamniphyllum (Rhamnaceae) from Markam, Tibet and their biogeographic implications

Zhou

Wang

Huang

et al. 2019

Sci. China Earth Sci.

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Late Miocene vegetation dynamics under monsoonal climate in southwestern China

Cited by 57 publications

References 59 publications

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

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

New Fagaceous pollen taxa from the Miocene Søby flora of Denmark and their biogeographic implications

Fossil leaves of Berhamniphyllum (Rhamnaceae) from Markam, Tibet and their biogeographic implications

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