globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2015.06.025
论文题名:
Sedimentary evolution and persistence of open forests between the south-eastern Alpine fringe and the Northern Dinarides during the Last Glacial Maximum
作者: Monegato G.; Ravazzi C.; Culiberg M.; Pini R.; Bavec M.; Calderoni G.; Jež J.; Perego R.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 436
起始页码: 23
结束页码: 40
语种: 英语
英文关键词: Alps ; Boreal forest ; Dinarides ; Fluvial dynamics ; LGM ; Tree refugia ; Vegetation ecology
英文摘要: We present a paleoenvironmental reconstruction for the mountain fringe between the South-Eastern Alps and the Northern Dinarides (NE-Italy/W-Slovenia) during the Last Glacial Maximum. We focused on a new sedimentary and paleoecological archive spanning the LGM acme, located in an aggrading, permanently flooded and ponded plain, dammed by an active fluvioglacial megafan. The ecosystem reconstruction, based on two high resolution pollen records, is supported by a rich plant macrofossil flora and constrained by a robust radiocarbon chronology between 26 and 22. cal. ka BP. We show evidence for persistence of boreal trees and of different open boreal forest types throughout the LGM at the south-eastern mountain fringe of the Alps and the Northern Dinarides. Fire frequency is responsible for high, oscillating forest openness. The paleobotanical record is discussed in the light of the ecogeographic diversity of the region. A belt formed by Swiss stone pine, larch and dwarf mountain pine on limestone bedrock, and accompanied by Spruce in the floodplain, extended uphill, while proximal outwash plain supported Scots pine and dwarf mountain pine. These differences arise from groundwater regimes rather than from local climate variability. A steep moisture gradient from the semiarid pedoclimatic regime prevailing in the Adriatic alluvial plain to the forested mountain fringe is related to the orographic rainout triggered by southern air circulation. Mesophytic broad-leaved forest trees did not withstand the LGM temperature extremes in zonal ecosystems at the Alpine-Dinaric fringe; however, the fossil evidence suggests a number of microrefugia in karstic and thermal spring habitats of the northern Adriatic. © 2015 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68842
Appears in Collections:过去全球变化的重建

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作者单位: CNR, Institute of Geosciences and Earth Resources, Via Valperga Caluso 35, Torino, Italy; CNR, Institute for the Dynamics of Environmental Processes, Lab. of Palynology and Palaeoecology, Piazza della Scienza 1, Milano, Italy; Jovan Hadži Institute of Biology, Slovenian Academy of Sciences, Novi trg 5, Ljubljana, Slovenia; Geological Survey of Slovenia, Dimičeva ulica 14, Ljubljana, Slovenia; Dept. of Earth Sciences, University La Sapienza, Piazzale A. Moro 5, Roma, Italy; CNR, Institute of Environmental Geology and Geoengineering, Area della Ricerca Roma 1, Montelibretti, Monterotondo, Italy; Integrative Prehistory and Archaeological Science, University of Basel, Spalenring 145, Basel, Switzerland

Recommended Citation:
Monegato G.,Ravazzi C.,Culiberg M.,et al. Sedimentary evolution and persistence of open forests between the south-eastern Alpine fringe and the Northern Dinarides during the Last Glacial Maximum[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,436
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