David F, Barbero M
Laboratoire botanique historique et palynologie, Imep, faculté des sciences et techniques Aix-Marseille-III, 13397 Marseille cedex 20, France.
C R Acad Sci III. 2001 Feb;324(2):159-64. doi: 10.1016/s0764-4469(00)01282-8.
Pollen analysis was carried out on lacustrine sediment of a small hollow (15 m x 25 m) at the treeless sub-Alpine belt (202 m) of the inner Maurienne valley in the northern French Alps. A 2,500-year-long maple settlement was demonstrared. Three AMS dates of terrestrial plant macroremains support the chronology. First, Betula and Salix spread prior to 9,000 C14 BP. The first pollen grains of Acer, Abies and Pinus cembra are quoted at 8,600 C14 BP. High frequencies of Alnus glutinosa/incana (20%) and Acer (10%) show that mixed communities of Acer and Alnus persisted above the mountainous Abies forest between 7,490 and 5,850 C14 BP. After 5,850 C14 BP, the decrease in Acer stands could be attributed to fire as suggested by the strong increase in Betula and by the delayed expansion of Pinus cembra.
对法国阿尔卑斯山北部毛里安纳山谷内部无树亚高山带（海拔202米）一个小洼地（15米×25米）的湖相沉积物进行了花粉分析。证实了枫树有2500年的定居历史。对陆生植物宏观残骸的三个放射性碳年代测定结果支持了这一年代顺序。首先，桦树和柳树在公元前9000年碳-14年之前就已扩散。槭树、冷杉和瑞士石松的第一批花粉粒记录于公元前8600年碳-14年。桤木（20%）和槭树（10%）的高频率表明，在公元前7490年至5850年碳-14年之间，槭树和桤木的混合群落持续存在于山区冷杉林之上。在公元前5850年碳-14年之后，槭树林的减少可能归因于火灾，这一点从桦树的大量增加和瑞士石松的延迟扩张可以看出。
