干旱区生态环境知识资源中心(Arid): 我国全新世泥炭alpha纤维素稳定碳同位素记录的对比与分析

Arid

	我国全新世泥炭alpha纤维素稳定碳同位素记录的对比与分析
其他题名	COMPARISON AND ANALYSES OF THE HOLOCENE PEAT alpha-CELLULOSE STABLE CARBON ISOTOPIC RECORDS FROM CHINA
	郭海春; 田怡苹; 魏士凯; 易嘉慧; 杨敏; 欧阳睿; 张东良; 饶志国
来源期刊	第四纪研究
ISSN	1001-7410
出版年	2020
卷号	40 期号:5 页码:1136-1144
中文摘要	泥炭是古气候研究的宝贵材料,alpha纤维素稳定碳同位素(delta~(13)C_(cell))是泥炭古气候研究的常用代用指标。我国已有数个地点报道了全新世泥炭全样或单种植物delta~(13)C_(cell)记录,对这些记录的古气候解译存在明显冲突。结合相应的孢粉和植物残体证据,对这些记录进行综合对比,结果发现:高山草地植被带和内陆干旱区荒漠草原植被带当中的泥炭地,全新世期间的原地植物种属构成相对稳定且未发生显著变化,因此其delta~(13)C_(cell)记录具有较为明显的长期变化趋势,其古气候解译也更为可靠;森林植被带和林草交互带当中的泥炭地,全新世期间的原地植物种属构成发生过显著变化(如木本植物入侵),这可能是造成其全新世delta~(13)C_(cell)记录长期趋势不明显或其古气候指示意义复杂难解的主要原因。这些结果显示了泥炭地的原地植物种属构成,对相应delta~(13)C_(cell)记录的古气候解译的重要影响。同时也表明,无论是泥炭delta~(13)C_(cell)研究地点的选择,还是泥炭delta~(13)C_(cell)记录的古气候解译,都需重视其来源植物种属构成和变化。对于全新世泥炭delta~(13)C_(cell)古气候研究,建议开展针对性的现代过程研究,尤其是优势泥炭植物种属的delta~(13)C_(cell)在时间序列上的现代过程研究,以提供可靠的古气候解译基础。
英文摘要	Peat is a precious archive for paleoclimatic studies.The stable carbon isotopic composition of peat alpha-cellulose (delta~(13)C_(cell)) has been widely adopted for paleoclimatic studies.There are several Holocene delta~(13)C_(cell) records of bulk peat samples or residues of a specific plant species have been reported in China,including the delta~(13)C_(cell) records from the Sahara sand peatland,Big Black peatland,Narenxia peatland in the Altai Mountains in northern Xinjiang region,the Chaiwobu peatland in the Tianshan Mountains in central Xinjiang region,the Hongyuan peatland in the northeastern Qinghai-Tibet Plateau,the Yuexi peatland in Southwestern China,the Dajiuhu peatland in Central China,and the Hani peatland in Northeastern China.However,both the obtained delta~(13)C_(cell) records themselves and the paleoclimatic interpretations of the delta~(13)C_(cell) records,are quite different.In this paper,combined with the relevant evidence of pollen and plant marcofossils,the delta~(13)C_(cell) records are carefully compared and analyzed.The results demonstrated that,in the peatlands in the alpine meadow zone and the arid inland desert-grass zone,the composition of plant species of the in situ vegetation was relative stable that without significant variations during the Holocene,and therefore the Holocene delta~(13)C_(cell) records from these peatlands have apparent long-term change trends,which could be paleoclimatically interpreted easily.However,in the peatlands in the forest zone and the forest/grassland transitional zone,the composition of plant species of the in situ vegetation experienced significant variations (for example,the invasion of woody plants into the peatland) during the Holocene,that's might the main reason why the Holocene delta~(13)C_(cell) records from these peatlands without apparent long-term change trends and the paleoclimatic significance of these Holocene delta~(13)C_(cell) records cannot be determined easily.All the results highlight the important influence from the plant composition of in situ peat vegetation on the paleoclimatic interpretations of peat delta~(13)C_(cell) records.Therefore,both the composition and the change of the in situ peat plants should be seriously considered in both the selection of the peat delta~(13)C_(cell) study site and the paleoclimatic interpretation of the obtained peat delta~(13)C_(cell) record.The site-specific modern-process study results,especially the results of the delta~(13)C_(cell) variations of the dominant peat plant species along time sequences,are important modern references for the paleoclimatic interpretations of Holocene peat delta~(13)C_(cell) records.
中文关键词	泥炭 ; 全新世 ; alpha纤维素 ; 稳定碳同位素 ; 植被 ; 古气候
英文关键词	peat Holocene alpha-cellulose delta~(13)C tree/grass paleoclimatic interpretation
类型	Article
语种	中文
收录类别	CSCD
WOS研究方向	Geology
CSCD记录号	CSCD:6815893
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336961
作者单位	郭海春, 湖南师范大学资源与环境科学学院, 长沙, 湖南 410081, 中国.; 田怡苹, 湖南师范大学资源与环境科学学院, 长沙, 湖南 410081, 中国.; 魏士凯, 湖南师范大学资源与环境科学学院, 长沙, 湖南 410081, 中国.; 易嘉慧, 湖南师范大学资源与环境科学学院, 长沙, 湖南 410081, 中国.; 杨敏, 湖南师范大学资源与环境科学学院, 长沙, 湖南 410081, 中国.; 欧阳睿, 湖南师范大学资源与环境科学学院, 长沙, 湖南 410081, 中国.; 饶志国, 湖南师范大学资源与环境科学学院, 长沙, 湖南 410081, 中国.; 张东良, 中国科学院新疆生态与地理研究所,中国科学院中亚生态与环境研究中心, 乌鲁木齐, 新疆 830011, 中国.
推荐引用方式 GB/T 7714	郭海春,田怡苹,魏士凯,等. 我国全新世泥炭alpha纤维素稳定碳同位素记录的对比与分析[J],2020,40(5):1136-1144.
APA	郭海春.,田怡苹.,魏士凯.,易嘉慧.,杨敏.,...&饶志国.(2020).我国全新世泥炭alpha纤维素稳定碳同位素记录的对比与分析.第四纪研究,40(5),1136-1144.
MLA	郭海春,et al."我国全新世泥炭alpha纤维素稳定碳同位素记录的对比与分析".第四纪研究 40.5(2020):1136-1144.