Possible obliquity-forced warmth in southern Asia during the last glacial stage

Zhao, Chuanyan; Rohling, Eelco J.; Liu, Zhengyu; Yang, Xiaoqiang; Zhang, Enlou; Cheng, Jun; Liu, Zhonghui; An, Zhisheng; Yang, Xiangdong; Feng, Xiaoping; Sun, Xiubao; Zhang, Can; Yan, Tingting; Long, Hao; Yan, Hong; Yu, Zicheng; Liu, Weiguo; Yu, Shi‐Yong; Shen, Ji

doi:10.1016/j.scib.2020.11.016

Cited by 94 publications

(37 citation statements)

References 84 publications

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“…Temperature drops during this time (0.24–0.28 Ma) have been suggested by many studies ( Zheng et al, 2002 ; Sun and An, 2005 ). During the last glacial period, the population decline about 0.02–0.03 Ma years ago may correspond to the Last Glacial Maximum (LGM) occurring 19.0–26.5 Ka years ago ( Sun and An, 2005 ; Clark et al, 2009 ; Zhao et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Genomic Data Reveals Population Genetic and Demographic History of Magnolia fistulosa (Magnoliaceae), a Plant Species With Extremely Small Populations in Yunnan Province, China

et al. 2022

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Elucidating the genetic background of threatened species is fundamental to their management and conservation, and investigating the demographic history of these species is helpful in the determination of the threats facing them. The woody species of the genus Magnolia (Magnoliaceae) have high economic, scientific and ecological values. Although nearly half of all Magnolia species have been evaluated as threatened, to date there has been no population genetic study employing Next Generation Sequencing (NGS) technology in this genus. In the present study, we investigate the conservation genomics of Magnolia fistulosa, a threatened species endemic to the limestone area along the Sino-Vietnamese border, using a double digest restriction-site-associated DNA-sequencing (ddRAD-seq) approach. To increase the reliability of our statistical inferences, we employed two approaches, Stacks and ipyrad, for SNP calling. A total of 15,272 and 18,960, respectively, putatively neutral SNPs were generated by Stacks and ipyrad. Relatively high genetic diversity and large population divergence were detected in M. fistulosa. Although higher absolute values were calculated using the ipyrad data set, the two data sets showed the same trends in genetic diversity (π, He), population differentiation (FST) and inbreeding coefficients (FIS). A change in the effective population size of M. fistulosa within the last 1 Ma was detected, including a population decline about 0.5–0.8 Ma ago, a bottleneck event about 0.2–0.3 Ma ago, population fluctuations during the last glacial stage, and the recovery of effective population size after the last glacial maximum. Our findings not only lay the foundation for the future conservation of this species, but also provide new insights into the evolutionary history of the genus Magnolia in southeastern Yunnan, China.

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Section: Discussionmentioning

confidence: 99%

Genomic Data Reveals Population Genetic and Demographic History of Magnolia fistulosa (Magnoliaceae), a Plant Species With Extremely Small Populations in Yunnan Province, China

et al. 2022

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“…(b) The regional hydroclimate of the Asian summer monsoon as indicated by the composite stalagmite δ 18 O record (H.. (c) Chinese loess 10 Be-based rainfall reconstruction(Beck et al, 2018). (d) Mean annual air temperature (MAAT) reconstructed by brGDGTs in a lake at southwest China(Zhao et al, 2021). Atmospheric CH 4 (e) and CO 2 (f) contents reconstructed from Antarctic ice cores(Köhler et al, 2017).…”

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confidence: 99%

Human Impacts Overwhelmed Hydroclimate Control of Soil Erosion in China 5,000 Years Ago

Zhang

Sun

et al. 2022

Geophysical Research Letters

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Human activities have been reported to have fundamentally and irreversibly modified Earth's surface since the industrial revolution (Ellis et al., 2013;Lewis & Maslin, 2015). For example, soil erosion rates during agricultural land use can be 10-to 100-fold greater than that through natural processes (Montgomery, 2007), which affects long-term soil sustainability and threatens future agricultural yields (Amundson et al., 2015). Soil erosion has also received increasing attention in terms of carbon fluxes because it is a source of increased carbon emissions into the atmosphere (Friedlingstein et al., 2020). Unfortunately, the magnitude and scope of anthropogenic impacts on soil erosion has only been systematically observed for the past few centuries (Dotterweich, 2013;Ellis et al., 2013), so that the long-term human effects on continental-scale soil erosion have yet to be well evaluated and constrained (

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“…Zhang et al, 2020). This proxy has been widely applied to reconstruct δDp in southwestern China (Feng et al, 2019;Zhao et al, 2021), a place located in the northeastern-end downstream of the ISM circulation where reconstructed rainfall isotope records is more sensitive to ISM variations than other upstream sites as monsoon moisture has experienced all possible isotopic fractionations before entering here.…”

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confidence: 99%

Paleoclimate Significance of Reconstructed Rainfall Isotope Changes in Asian Monsoon Region

Cheng

Wang

Yan

et al. 2021

Geophysical Research Letters

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Speleothem oxygen isotope (δ18Oc) records have been regarded as a critical reference to study past Asian monsoon variability. However, existing δ18Oc records in the Indian monsoon region are fragmented in time coverage and/or sampling resolution since the last deglaciation. Also, the climatic interpretation of δ18Oc is still obscure. Here, we report a continuous and centennial‐resolved leaf wax hydrogen isotope (δDwax) record over the past ∼28 ka from Lugu Lake in Indian‐monsoon influenced southwestern China. Our new record shows striking consistency with the well‐established δ18Oc record in East Asian monsoon‐influenced southeastern China, revealing a spatially coherent change and thus a similar physical process in rainfall isotopes in the broader Asian monsoon region. Based on the combination with the TraCE21ka simulation, we propose reconstructed long‐term and millennial‐scale isotope changes could be influenced by the intensity of local convection along the monsoon trough, which extends from the Indian subcontinent across to the Philippines in summer.

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Possible obliquity-forced warmth in southern Asia during the last glacial stage

Cited by 94 publications

References 84 publications

Genomic Data Reveals Population Genetic and Demographic History of Magnolia fistulosa (Magnoliaceae), a Plant Species With Extremely Small Populations in Yunnan Province, China

Genomic Data Reveals Population Genetic and Demographic History of Magnolia fistulosa (Magnoliaceae), a Plant Species With Extremely Small Populations in Yunnan Province, China

Human Impacts Overwhelmed Hydroclimate Control of Soil Erosion in China 5,000 Years Ago

Paleoclimate Significance of Reconstructed Rainfall Isotope Changes in Asian Monsoon Region

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