干旱区生态环境知识资源中心(Arid): Palaeoenvironmental use of silicophytoliths in soils and palaeosols associated with Holocene volcanic ash deposits in north-western Argentina

Arid

DOI	10.1016/j.quaint.2019.07.001
	Palaeoenvironmental use of silicophytoliths in soils and palaeosols associated with Holocene volcanic ash deposits in north-western Argentina
	Osterrieth, Margarita 1,2,3; Fernanda Alvarez, Maria 1,2,3; Fernando Gallardo, Juan 4; Saavedra, Julio 4; Fernandez-Turiel, Jose-Luis 5; Rodriguez-Gonzalez, Alejandro 6; Perez-Torrado, Francisco J.6; Rejas, Marta 5
通讯作者	Fernandez-Turiel, Jose-Luis
来源期刊	QUATERNARY INTERNATIONAL
ISSN	1040-6182
EISSN	1873-4553
出版年	2019
卷号	522 页码:103-112
英文摘要	We compare the silicophytolith record of current soils and Holocene palaeosols from two sedimentary sequences in a region between the Chaco-Pampean Plain and the Puna (Tolombon section in Santa Maria Valley, and Tafi del Valle section in Tafi Valley), NW Argentina. These two geographic areas are separated by the Aconquija-Cumbres Calchaquies ranges, a climatic barrier to the wet Atlantic winds. These sequences contain volcanic ash deposits recording two large eruptions occurred during Holocene in the Southern Puna in the Central Volcanic Zone of the Andes, from the Cueros de Purulla volcano (ca. 7820 BP) and the Cerro Blanco Volcanic Complex (ca. 4200 cal BP). These ash-fall deposits buried soils and preserved their silicophytolith record, allowing the use of this palaeoenvironmental proxy to clarify the vegetation prior these two volcanic events. The silicophytolith assemblages yield evidence for a desert shrubland when Tolombon palaeosol was formed, similar to the presentday environment in the Santa Maria Valley, with presence of C-4 grasses (Chloridoideae and Panicoidae). Instead, the climate was cooler and wetter ca. 4200 cal BP than currently in the Tafi Valley, increasing over time aridity and abundance of C-4 grasses (Chloridoidae, Panicoideae), and decreasing the quantity of C-3 grasses (Pooideae). Prehistorical and historical land use also contributed to this change. The impact of these large volcanic ash-falls on vegetation did not translate in an abrupt change on phytodiversity. Results point out a stable arid environment during Holocene in the Santa Maria Valley whereas the Tafi Valley was more sensitive to environmental changes due to its location in the eastern slopes of Aconquija-Cumbres Calchaquies ranges, more exposed to the wet Atlantic winds.
英文关键词	Silicophytolith Shrubland Grassland Vegetation Volcanic ash Environment Holocene Argentina
类型	Article
语种	英语
国家	Argentina ; Spain
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000485032800009
WOS关键词	SANTA-MARIA VALLEY ; MIDHOLOCENE ; MECHANISMS ; PHYTOLITHS ; POACEAE ; CLIMATE ; SILICA
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218244
作者单位	1.UNMdP, Inst Geol Costas & Cuaternario, FCEyN, Mar Del Plata, Buenos Aires, Argentina; 2.UNMdP, CONICET, Inst Invest Marinas & Costeras, Mar Del Plata, Buenos Aires, Argentina; 3.Consejo Nacl Invest Cient & Tecn, Buenos Aires, DF, Argentina; 4.CSIC, IRNASA, Salamanca, Spain; 5.CSIC, Inst Earth Sci Jaume Almera, ICTJA, E-08028 Barcelona, Spain; 6.ULPGC, Inst Estudios Ambientales & Recursos Nat I UNAT, Las Palmas Gran Canaria, Spain
推荐引用方式 GB/T 7714	Osterrieth, Margarita,Fernanda Alvarez, Maria,Fernando Gallardo, Juan,et al. Palaeoenvironmental use of silicophytoliths in soils and palaeosols associated with Holocene volcanic ash deposits in north-western Argentina[J],2019,522:103-112.
APA	Osterrieth, Margarita.,Fernanda Alvarez, Maria.,Fernando Gallardo, Juan.,Saavedra, Julio.,Fernandez-Turiel, Jose-Luis.,...&Rejas, Marta.(2019).Palaeoenvironmental use of silicophytoliths in soils and palaeosols associated with Holocene volcanic ash deposits in north-western Argentina.QUATERNARY INTERNATIONAL,522,103-112.
MLA	Osterrieth, Margarita,et al."Palaeoenvironmental use of silicophytoliths in soils and palaeosols associated with Holocene volcanic ash deposits in north-western Argentina".QUATERNARY INTERNATIONAL 522(2019):103-112.