期刊
HOLOCENE
卷 29, 期 3, 页码 380-402出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0959683618816457
关键词
benthic foraminifera; climate variability; dinoflagellate cysts; human impacts; palaeoenvironments reconstructions; pollen grains
资金
- French CNRS
- UBO-BQR project: 'PARADE: Signature PAleoenvironnementale des sequences holocenes en RADE de Brest'
- 'Laboratoire d'Excellence' LabexMER [ANR-10-LABX-19]
- French government under the program 'Investissements d'Avenir'
Sedimentological, palynological, and micropalaeontological studies carried out throughout the first half of the Holocene, during the Mesolithic/Neolithic transition in the Bay of Brest (i.e. 9200-9000 and 6600-5300 cal. BP) and in the Bay of Douarnenez (i.e. 9200-8400 cal. BP), allowed characterizing coastal environmental changes under the increasing influence of the relative sea-level rise. The gradual flooding of the two studied sites implied a transition from river valleys to oceanic bays as revealed by the gradual retreat of salt marsh environments, as detected through palynological analysis. In addition, these high-resolution studies highlight the regional imprint of the North Atlantic millennial climate variability in north-western coastal environments. Two cold climate events are indeed suggested to have been locally marked by a moisture increase, mainly detected by increases in Lingulodinium machaerophorum, Corylus, and Alnus percentages at 8550 cal. BP in the Bay of Douarnenez and at 6250 cal. BP in the Bay of Brest. Moreover, regarding the Neolithic transition timing in the Bay of Douarnenez, large pollen grains of Poaceae (i.e. Cerealia-type pollen grains) have been detected at around 8600 cal. BP, that is, 1500 years before the general accepted cereal cropping appearance in Western France. These results, consistent with other palynological studies conducted in the French Atlantic coast, could underline a Mesolithic proto-agriculture' in Brittany.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据