DOI: 10.1016/j.palaeo.2016.09.016
论文题名: Cenozoic vegetation gradients in the mid- and higher latitudes of Central Eurasia and climatic implications
作者: Popova S. ; Utescher T. ; Gromyko D.V. ; Bruch A.A. ; Henrot A.-J. ; Mosbrugger V.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 467 起始页码: 69
结束页码: 82
语种: 英语
英文关键词: Cenozoic
; Central Eurasia
; Palaeoclimate
; Palaeofloras
; Plant functional types
; Vegetation
英文摘要: Cenozoic vegetation gradients in the mid- and higher latitudes of Central Eurasia are studied based on a total of 22 mega- (fruits and seeds, leaves) and 20 microfloras (pollen and spores) compiled from literature. Vegetation is interpreted at the level of plants functional types (PFTs) using a system including 26 classes and an aquatic functional type. The obtained ecospectra showing diversity of PFTs are interpreted in three time slices, namely the early Oligocene, early Miocene and late Pliocene/early Pleistocene. Our results confirm the presence of diverse mixed forests (Turgai type) in the study area throughout the late Paleogene and early Neogene, partly, raised diversity of herbaceous components, especially of dry herbs, and the presence of xeric shrub PFTs points to more open plant cover. The late Pliocene/early Pleistocene spectra from the central and southern latitudinal zones of the study area confirm the existence of open landscapes in general, but partly have a considerable arboreal diversity excluding the presence of mere steppe. Ecospectra obtained from the diversity of functional types have a characteristic representativeness depending on the organ types considered in each case, and therefore have a delimited comparability. Our results show that PFT diversities obtained from microfloras are most suitable in estimating the openness of landscape and in representing zonal biomes in general. The vegetational patterns reconstructed based on the ecospectra of fossil floras basically support the results obtained from previous palaeoclimate reconstructions evidencing cooling and drying of the continental interior of Eurasia throughout the later Neogene. Moreover, the PFT approach is proven more sensitive to identify seasonal drought when compared to other, taxonomy based climate reconstruction methods. Moreover, a first attempt is made to quantify latitudinal temperature gradients for the study area. Data indicate that the Oligocene and early Miocene gradients where shallow and almost identical while the late Pliocene/early Pleistocene gradient was intermediate between the earlier Neogene and the modern one. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67988
Appears in Collections: 过去全球变化的重建
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作者单位: Komarov Botanical Institute, 2 Prof. Popova Street, St. Petersburg, Russian Federation; Steinmann Institute, Bonn University, Nussallee 8, Bonn, Germany; Senckenberg Research Institute and Natural History Museum, Biodiversity and Climate Research Centre, Senckenberganlage 25, Frankfurt am Main, Germany; Heidelberg Academy of Sciences and Humanities, Research Center ‘The Role of Culture in Early Expansions of Humans’ at Senckenberg Research Institute, Senckenberganlage 25, Frankfurt am Main, Germany; Unité de Modélisation du Climat et des Cycles Biogéochimiques, University of Liège, Liège, Belgium
Recommended Citation:
Popova S.,Utescher T.,Gromyko D.V.,et al. Cenozoic vegetation gradients in the mid- and higher latitudes of Central Eurasia and climatic implications[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,467