DOI: 10.1016/j.quascirev.2018.05.026
Scopus记录号: 2-s2.0-85047807414
论文题名: Intermittent development of forest corridors in northeastern Brazil during the last deglaciation: Climatic and ecologic evidence
作者: Bouimetarhan I. ; Chiessi C.M. ; González-Arango C. ; Dupont L. ; Voigt I. ; Prange M. ; Zonneveld K.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 192 起始页码: 86
结束页码: 96
语种: 英语
英文关键词: Caatinga
; Dinocysts
; Forest corridor
; Northeastern Brazil
; Paleoclimate
; Pollen
; Younger Dryas
Scopus关键词: Biodiversity
; Climate change
; Climate models
; Oceanography
; Vegetation
; Caatinga
; Dinocysts
; Forest corridor
; Northeastern Brazil
; Paleoclimates
; Pollen
; Younger Dryas
; Forestry
; biome
; caatinga
; climate variation
; dinoflagellate cyst
; dry forest
; ecohydrology
; forest ecosystem
; habitat corridor
; intertropical convergence zone
; last deglaciation
; paleoclimate
; paleoecology
; plant
; pollen
; rainfall
; rainforest
; Younger Dryas
; Amazonia
; Atlantic Forest
; Atlantic Ocean
; Atlantic Ocean (North)
; Brazil
; Filicophyta
英文摘要: The semi-arid northeastern (NE) Brazil vegetation is largely dominated by Caatinga, one of the largest and richest dry forests in the world. Caatinga is a strategic biome, since it has borders with Cerrado, Atlantic forests and the Amazon, acting as a potential corridor (or barrier) for biotic interchange between these regions during evolutionary times. Therefore, accurate reconstructions of past vegetation, ecological and hydrological changes in this area are critical to understanding the dynamics of biome boundaries that may play an important role in dispersal and diversification mechanisms and, more specifically, the link between the long-term climate variability and tropical biodiversity. Here, we present high-resolution palynological and elemental data from marine core GeoB16205-4 retrieved off the Parnaíba River mouth (NE Brazil) mainly covering the Younger Dryas (YD). We show that the YD interval was predominantly wet in NE Brazil, yet it was not homogenous and two distinct phases could be distinguished. A marked intensification of wet conditions between ∼12.3 and 11.6 cal kyr BP was recorded by the expansion of tropical rainforest and tree ferns. These results are in agreement with the transient TraCE-21k coupled climate model simulation. We infer that the second pluvial phase of the YD is related to a weak AMOC due to meltwater pulses in the North Atlantic, which forces a southward shift of the Intertropical Convergence Zone and its associated rainfall. Our records provide new evidence on the establishment of an “eastern forest corridor” in the nowadays semi-arid Caatinga allowing for past biotic interchanges of plant species. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112137
Appears in Collections: 气候减缓与适应
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作者单位: MARUM-Center for Marine Environmental Sciences and Faculty of Geosciences, University of Bremen, P.O. Box 330440, Bremen, D-28334, Germany; School of Arts, Sciences and Humanities, University of São Paulo, Av. Arlindo Bettio, CEP03828-000, São Paulo, SP 1000, Brazil; Department of Biological Sciences, Universidad Los Andes, A.A. 4976, Bogotá, Colombia
Recommended Citation:
Bouimetarhan I.,Chiessi C.M.,González-Arango C.,et al. Intermittent development of forest corridors in northeastern Brazil during the last deglaciation: Climatic and ecologic evidence[J]. Quaternary Science Reviews,2018-01-01,192