干旱区生态环境知识资源中心(Arid): Late Holocene decoupling of lake and vegetation ecosystem in response to centennial-millennial climatic changes in arid Central Asia: A case study from Aibi Lake of western Junggar Basin

Arid

DOI	10.1016/j.palaeo.2024.112233
	Late Holocene decoupling of lake and vegetation ecosystem in response to centennial-millennial climatic changes in arid Central Asia: A case study from Aibi Lake of western Junggar Basin
	Pan, Long; Li, Guoqiang; Chen, Chunzhu; Liu, Yuanlu; Lai, Ji; Yang, Jin; Jin, Ming; Wang, Zhong; Wang, Xiaoyan; Ding, Weiping
通讯作者	Li, GQ
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2024
卷号	646
英文摘要	Central Asian lakes are crucial for sustaining fragile oasis ecosystems in arid regions. Understanding the response of ecosystems in these lake basins to climate change is essential for predicting future variations in these ecosystems. Aibi Lake is a notable terminal lake in arid Central Asia. In this study, a 95 cm lacustrine sediment core was drilled from Aibi Lake to investigate the response of lacustrine and terrestrial ecosystems in the lake basin to climate change over the past 3200 years. Accelerator mass spectrometry (AMS) 14 C dating and multi-proxy analyses of diatoms, pollen, grain size, total organic content (TOC), total nitrogen (TN), and total hydrogen (TH) are applied to the sediment core. The grain size and geochemical results show that the lake experienced elevated levels and improved productivity and nutrition during the periods of 708 -181 BCE, 0 -740 CE, and 1428 -1900 CE. The periods align with the Roman Warm Period, Dark Age Cold Period, and Little Ice Age, respectively. For the past 3200 years, benthic diatoms have consistently been the dominant species in the lake. During the climatic transition periods of the Dark Age Cold Period, Medieval Warm Period, and Little Ice Age, there were significant changes in the abundance and survival of certain species of diatoms. Specifically, the halophilic species ( Nitzschia dissipata and Nitzschia hungarica ), basophilic species ( Synedra acus ), and the nutrition level-relevant species ( Navicula menisculus ) experienced notable shifts. These changes ultimately resulted in a noticeable alteration in the structure and function of the diatom community. Over the past 3200 years, the lake ecosystem has undergone three noticeable regime shifts. In contrast, the vegetation in the lake catchment has remained relatively stable, primarily consisting of desert steppe. These results suggest that aquatic ecosystems in arid central Asia are more susceptible and exhibit more rapid responses to climate change compared to terrestrial vegetation.
英文关键词	Climatic changes Diatom Pollen Regime shift Lake ecosystem Arid Central Asia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001243805400001
WOS关键词	GRAIN-SIZE COMPONENT ; PALYNOLOGICAL RECORD ; NORTHERN XINJIANG ; LEVEL STATUS ; ALPINE LAKE ; ICE-AGE ; POLLEN ; REGION ; CHINA ; EBINUR
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405030
推荐引用方式 GB/T 7714	Pan, Long,Li, Guoqiang,Chen, Chunzhu,et al. Late Holocene decoupling of lake and vegetation ecosystem in response to centennial-millennial climatic changes in arid Central Asia: A case study from Aibi Lake of western Junggar Basin[J],2024,646.
APA	Pan, Long.,Li, Guoqiang.,Chen, Chunzhu.,Liu, Yuanlu.,Lai, Ji.,...&Ding, Weiping.(2024).Late Holocene decoupling of lake and vegetation ecosystem in response to centennial-millennial climatic changes in arid Central Asia: A case study from Aibi Lake of western Junggar Basin.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,646.
MLA	Pan, Long,et al."Late Holocene decoupling of lake and vegetation ecosystem in response to centennial-millennial climatic changes in arid Central Asia: A case study from Aibi Lake of western Junggar Basin".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 646(2024).