DOI: 10.1016/j.quascirev.2015.05cty
Scopus记录号: 2-s2.0-84945457405
论文题名: A Late Holocene environmental history of a bat guano deposit from Romania: An isotopic, pollen and microcharcoal study
作者: Forray F.L. ; Onac B.P. ; Tanţău I. ; Wynn J.G. ; Tămaş T. ; Coroiu I. ; Giurgiu A.M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 127 起始页码: 141
结束页码: 154
语种: 英语
英文关键词: Carbon isotopes
; Cave guano
; Environmental history
; Late Holocene
; Little Ice Age
; Microcharcoal
; Pollen
; Romania
Scopus关键词: Agriculture
; Carbon
; Caves
; Deforestation
; Deposits
; Environmental protection
; Glacial geology
; Isotopes
; Manures
; Vegetation
; Carbon isotopes
; Environmental history
; Late Holocene
; Little Ice Age
; Microcharcoal
; Pollen
; Romania
; Plants (botany)
; bat
; carbon isotope
; cave
; charcoal
; climate conditions
; deciduous tree
; environmental change
; environmental history
; guano
; Holocene
; Little Ice Age
; monocotyledon
; phytomass
; pollen
; vegetation dynamics
; Romania
; Alnus
; Carpinus betulus
; Fagus sylvatica
; Fraxinus
; Fraxinus sylvatica
; Poaceae
; Quercus
; Tilia
; Zea
英文摘要: A 1.5-m-long core from a bat guano deposit in Zidită Cave (western Romania) has provided a 900-year record of environmental change. Shifts in δ13C values of bulk guano (between -22.6 and -27.5‰) combined with guano-sourced pollen and microcharcoal information show significant changes in the structure of vegetation and plant biomass. Cave guano δ13C values reflect the dietary preferences of bats which are controlled by local vegetation dynamics, which in turn depend on local climatic conditions. Neither δ13C values nor pollen association in guano changed strikingly over the Medieval Warm Period (MWP) and Little Ice Age (LIA) transition. Instead, an overall decreasing trend of δ13C values between ca. AD 1200 and 1870-1900 defines the duration of LIA. A shift toward cooler and wetter conditions at ca. AD 1500 noticed in the pollen record by an increase in Fagus sylvatica and Alnus and the decrease of Carpinus betulus, may indicate the first major change at the beginning of the LIA. Evidence for two major cold spells occurring around AD 1500 and ca. AD 1870 comes from both δ13C and pollen record. In between these events, the cave region experienced a warmer and drier climate but colder and wetter than the MWP, favouring the expansion of Quercus, Fraxinus and Tilia simultaneously with the decrease of F. sylvatica and Poaceae. Human impact in the studied area is mainly related to agriculture, grazing and deforestation. The effects are most pronounced after AD 1845 when the pollen of cereals increases and Zea is recorded (AD 1845). Higher percentages of microcharcoal particles in the guano sequence are generally correlated with agricultural activities like land cleaning via controlled fires. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59802
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geology, Babeş-Bolyai University, Kogălniceanu 1, Cluj-Napoca, Romania; School of Geosciences, University of South Florida, 4202 E. Fowler Ave, NES 107, Tampa, United States; Department of Taxonomy and Ecology, Babeş-Bolyai University, Clinicilor 5, Cluj-Napoca, Romania
Recommended Citation:
Forray F.L.,Onac B.P.,Tanţău I.,et al. A Late Holocene environmental history of a bat guano deposit from Romania: An isotopic, pollen and microcharcoal study[J]. Quaternary Science Reviews,2015-01-01,127