气候变化领域集成服务门户(CCPortal): Neoglacial trends in diatom dynamics from a small alpine lake in the Qinling mountains of central China

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DOI	10.5194/cp-16-543-2020
	Neoglacial trends in diatom dynamics from a small alpine lake in the Qinling mountains of central China
	Cheng B.; Adams J.; Chen J.; Zhou A.; Zhang Q.; W MacKay A.
发表日期	2020
ISSN	18149324
起始页码	543
结束页码	554
卷号	16 期号:2
英文摘要	During the latter stages of the Holocene, and prior to anthropogenic global warming, the Earth underwent a period of cooling called the neoglacial. The neoglacial is associated with declining summer insolation and changes to Earth's surface albedo. Although impacts varied globally, in China the neoglacial was generally associated with a cooler climate and an attenuated Asian summer monsoon. Few studies in central China, however, have explored the impact of neoglacial cooling on freshwater diversity, especially in alpine regions. Here we take a palaeolimnological approach to characterise multi-decadal variability in diatom community composition, ecological guilds, and compositional turnover over the past 3500 years from the alpine Yuhuang Chi lake on Mount Taibai in the Qinling mountains. Diatoms in the high-profile guild dominate much of the record from 3500 to 615 cal BP, which suggests that few nutrients in the lake were limiting overall, and disturbance and herbivory were likely low. After 615 cal BP, low-profile and planktic guild diatoms increase, suggesting greater turbulence in the lake, alongside a decline in available nutrients. Diatom turnover highlights periods in the lake history when deterministic processes structured diatom communities. For example, an abrupt decline in turnover is coincident with the shift from high- to low-profile diatoms at 615 cal BP, and this is likely due to the onset of the Little Ice Age in the region. We suggest that Yuhuang Chi lake became more shallow during peak regional aridity, which led to the short-lived community restructuring observed in the record. © 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	alpine environment; community structure; decadal variation; diatom; disturbance; global warming; lacustrine environment; Little Ice Age; Neoglacial; paleolimnology; seasonal variation; China; China; Qinling Mountains; Taibai Mountain; Bacillariophyta
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146731
作者单位	College of Urban and Environmental Science, Central China Normal University, Wuhan, 430079, China; Department of Biology, University of Waterloo, Waterloo, ON, Canada; Key Laboratory of West China's Environmental System (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; Environmental Change Research Centre (ECRC), Department of Geography, University College London (UCL), London, WC1E 6BT, United Kingdom
推荐引用方式 GB/T 7714	Cheng B.,Adams J.,Chen J.,et al. Neoglacial trends in diatom dynamics from a small alpine lake in the Qinling mountains of central China[J],2020,16(2).
APA	Cheng B.,Adams J.,Chen J.,Zhou A.,Zhang Q.,&W MacKay A..(2020).Neoglacial trends in diatom dynamics from a small alpine lake in the Qinling mountains of central China.Climate of the Past,16(2).
MLA	Cheng B.,et al."Neoglacial trends in diatom dynamics from a small alpine lake in the Qinling mountains of central China".Climate of the Past 16.2(2020).