Vegetation changes during the past 40,000 years in Central China from a long fossil record
Vegetation changes during the past 40,000 years in Central China from a long fossil record
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从长期化石记录看华中地区过去四万年的植被变化
DOI：
10.1016/j.quaint.2012.01.009
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发表时间：
2013-10
影响因子：
2.2
通讯作者：
Rachid Cheddadi
中科院分区：
文献类型：
--
作者：
Jie Li;Zhuo Zheng;Kangyou Huang;Shixiong Yang;Brian Chase;Verushka Valsecchi;Matthieu Carré;Rachid Cheddadi
本文描述了从中国中部神农架山大九湖采集的 6 m 岩心获得的孢粉学、沉积学和地球化学结果，时间跨度为过去 40,000 年。该地点位于亚热带地区，以栖息许多特有物种而闻名。花粉记录表明，过去冰川时期的气候变化使得温暖的树木甚至亚热带类群得以持续存在。树栖花粉类群的百分比从末次冰期之前和期间的 40% 到全新世期间的约 60% 不等。 δ13C数据表明优势植被由C3植物组成。然而，尽管该地点周围持续存在树类群，但总有机碳表明，冰期期间生物量非常低（MIS 3和2），这与针叶树和常绿树类群的优势有关，这些树类群的生物量生产者非常低。总有机碳（TOC）在末次冰期末（MIS 2末）开始稳定增加，这反映了MIS 2末记录到的泥炭藓孢子数量的急剧增加，标志着泥炭沼泽开始形成和原位生物量的增加。全新世期间增加的夏绿类群也可能对 TOC 的增加做出了贡献。
This paper describes the palynological, sedimentological and geochemical results obtained from a 6 m core taken from Lake Dajiuhu in Shennongjia Mountains, central China, spanning the last 40,000 BP. The site is located in a subtropical area which is known for harboring many endemic species. The pollen record shows that past climate changes during the Glacial allowed the persistence of warm trees and even subtropical taxa. The percentages of arboreal pollen taxa vary from 40% before and during the last glacial period to ∼60% during the Holocene. The δ13C data indicate that the dominant vegetation was composed of C3plants. However, despite the continuous presence of tree taxa around the site, the total organic carbon indicates that the biomass was very low during the glacial period (MIS 3 and 2), related to the dominance of conifers and evergreen tree taxa, which are very low biomass producers. The total organic carbon (TOC) started to increase steadily at the end of the last glacial period (end of MIS 2), which reflects the sharp increase in the amount ofSphagnumspores recorded at the end of MIS 2, marking the beginning of the peat bog formation and the increase of thein-situbiomass. The summergreen taxa, which increased during the Holocene, may have also contributed to the TOC increase.
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影响因子：
11.4
作者：
Fan Jing-yun;Song Yong-chang;Liu Hong-yan;Piao Shi-long
通讯作者：
Fan Jing-yun;Song Yong-chang;Liu Hong-yan;Piao Shi-long
影响因子：
4
作者：
G. Ren;H. Beug
通讯作者：
G. Ren;H. Beug
影响因子：
8.3
作者：
STUIVER, M;POLACH, HA
通讯作者：
POLACH, HA
影响因子：
--
作者：
Sun Shu-cun
通讯作者：
Sun Shu-cun
影响因子：
5.2
作者：
Still, CJ;Berry, JA;DeFries, RS
通讯作者：
DeFries, RS