Vegetation and climate changes in the Changjiang (Yangtze River) Delta, China, during the past 13,000 years inferred from pollen records
Vegetation and climate changes in the Changjiang (Yangtze River) Delta, China, during the past 13,000 years inferred from pollen records
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DOI：
10.1016/s0277-3791(03)00080-5
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发表时间：
2003-06
影响因子：
4
通讯作者：
Sangheon Yi;Y. Saito;Quanhong Zhao;Pinxian Wang
中科院分区：
文献类型：
--
作者：
Sangheon Yi;Y. Saito;Quanhong Zhao;Pinxian Wang
长江三角洲两个钻孔的高分辨率花粉记录显示了过去13,000年来植被和气候的一系列明确变化。在更新世晚期到全新世早期（BP 12，900 - 10，300 cal yr），花粉主要由旱生草本植物蒿属和常见的针叶树组成，表明针叶林和草原以及凉爽，干燥的气候，可能以新仙女木为代表。从10,300到9000卡年BP，温暖，潮湿的气候促进了混合阔叶常绿落叶林的发展，生长在草原和周围的丘陵和高地。从9000到7600卡年BP，针叶树的优势和减少阔叶万年青树木花粉表明凉爽，干燥的条件。中全新世“高温”（7600-4800卡年BP）是由亚热带常绿落叶阔叶林的大规模扩张。在4800和1300 cal yr BP之间，对应于其他地方的新冰期，针叶树占主导地位，沿着与常见的草本植物，而阔叶万年青树木的面积在凉爽，干燥的条件下收缩。荞麦花粉的第一次出现在4500 cal yr BP表明人类的影响。1300 cal yr BP后乔木和草本花粉的显著变化反映了广泛而强烈的人类影响。
A high-resolution pollen record from 2 boreholes from the Changjiang (Yangtze River) delta shows a series of well-defined changes in vegetation and climate over the last 13,000 yr . In latest Pleistocene to early Holocene time (12,900–10,300 cal yr BP), pollen dominated by the xerophytic herb Artemisia and common conifers indicate coniferous forest and grasslands and a cool, dry climates, possibly represented by the Younger Dryas. From 10,300 to 9000 cal yr BP, a warm, wet climate fostered the development of mixed broadleaved evergreen–deciduous forests to grow on the grasslands and surrounding hills and uplands. From 9000 to 7600 cal yr BP, the dominance of conifers and the reduction in broadleaved evergreen trees pollen suggest cool, dry conditions. The mid-Holocene “hypsithermal” (7600–4800 cal yr BP) is represented by a large expansion of subtropical evergreen–deciduous broadleaved forests. Between 4800 and 1300 cal yr BP, which corresponds to a Neoglacial period elsewhere, conifers are dominant, along with common herbs, whereas the area with broadleaved evergreen trees shrink under the cool, dry conditions. The first occurrence of Fagopyrum pollen at 4500 cal yr BP suggests human influence. The significant change in arboreal and herbaceous pollen after 1300 cal yr BP reflects widespread intensive human influence.