气候变化领域集成服务门户(CCPortal): Pollen dispersal patterns in marine surface sediments from the San Jorge Gulf; SE Patagonia (Argentina)

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DOI	10.1016/j.palaeo.2020.109869
	Pollen dispersal patterns in marine surface sediments from the San Jorge Gulf; SE Patagonia (Argentina)
	Faye S.; Rochon A.; St-Onge G.; Vilanova I.
发表日期	2020
ISSN	0031-0182
卷号	556
英文摘要	This paper analyzes the distribution patterns of pollen and spore assemblages in modern surface sediments recovered from the bottom of the San Jorge Gulf (SJG) and from offshore sites, in relation to the location of different phytogeographic provinces surrounding the SJG, including the distant forest from southwestern Patagonia. Results reveal that pollen spectra are dominated by Chenopodiaceae-Amaranthaceae, Poaceae, Asteraceae subf. Asteroideae, Colliguaja integerrima and Ephedra sp.; which represents the vegetation adjacent to the SJG. Overall, the pollen distribution in surface sediments reflects the location of the different phytogeographic provinces and will be used as modern-analogues to document vegetation history around the SJG. Pollen assemblages also reveal the latitudinal variation of vegetation taxa in the Patagonian steppe, which is characterized by a slight increase in herbaceous pollen and a decrease in high shrubs (e.g. Colliguaja integerrima) towards the southern-central part of the SJG. Furthermore, we identified two pollen taxa from the southwestern Patagonian forest, Nothofagus and Podocarpus that could be used as indicators of past dynamics and variations of the Southern Westerly Wind Belt (SWWB) in the SJG during the Late Pleistocene and Holocene. High pollen concentrations are recorded at the central part of the SJG (480–8080 grains/g), while low concentrations are measured in the northern and southern parts of the Gulf, as well as at offshore sites (26–1806 grains/g). The pollen distribution in the study area is most likely governed by the SWWB in combination with the marine sediment composition and surface currents flowing through the SJG. © 2020 Elsevier B.V.
英文关键词	Argentinian Continental shelf; Pollen patterns; Southeastern Patagonia; Southern Westerly Winds
语种	英语
scopus关键词	concentration (composition); dispersal; forest ecosystem; fossil assemblage; marine sediment; phytogeography; Pleistocene; pollen; spore; surficial sediment; vegetation history; Argentina; Atlantic Ocean; Patagonia; San Jorge Gulf; Amaranthaceae; Asteraceae; Asteroideae; Colliguaja integerrima; Ephedra sp.; Nothofagus; Poaceae; Podocarpus
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150391
作者单位	Institut des sciences de la mer de Rimouski (ISMER), Université du Québec à Rimouski, Rimouski, Québec, Canada; GEOTOP Research Center, Québec, Montréal, Canada; Canada Research Chair in Marine Geology, Rimouski, Québec, Canada; CONICET-Museo Argentino de Ciencias Naturales, Buenos Aires, Argentina
推荐引用方式 GB/T 7714	Faye S.,Rochon A.,St-Onge G.,et al. Pollen dispersal patterns in marine surface sediments from the San Jorge Gulf; SE Patagonia (Argentina)[J],2020,556.
APA	Faye S.,Rochon A.,St-Onge G.,&Vilanova I..(2020).Pollen dispersal patterns in marine surface sediments from the San Jorge Gulf; SE Patagonia (Argentina).Palaeogeography, Palaeoclimatology, Palaeoecology,556.
MLA	Faye S.,et al."Pollen dispersal patterns in marine surface sediments from the San Jorge Gulf; SE Patagonia (Argentina)".Palaeogeography, Palaeoclimatology, Palaeoecology 556(2020).