干旱区生态环境知识资源中心(Arid): Precipitation variability, vegetation turnover, and anthropogenic disturbance over the last millennium in the Atacama highlands of northern Chile (19°S)

Arid

DOI	10.1177/09596836231151834
	Precipitation variability, vegetation turnover, and anthropogenic disturbance over the last millennium in the Atacama highlands of northern Chile (19°S)
	Domic, Alejandra, I; De Porras, Maria Eugenia; Capriles, Jose M.; Zamora-Allendes, Andres; Ivory, Sarah J.; Maldonado, Antonio
通讯作者	Domic, AI
来源期刊	HOLOCENE
ISSN	0959-6836
EISSN	1477-0911
出版年	2023
卷号	33 期号:5 页码:536-549
英文摘要	The Late-Holocene history of hydroclimatic variability in the Atacama Desert offers insights into the effects of precipitation and humans on ecosystems in one of the most extremely arid regions of the world. However, understanding the effects of regional precipitation variability in relation to local ecological stressors remains to be fully resolved. Here, we present a pollen-based qualitative precipitation reconstruction derived from fossil rodent middens recovered from two sites near Laguna Roja (LRO; n = 25) and Isluga (ISL; n = 15) in the Atacama highlands (19 degrees S) of northern Chile. At LRO, the fossil pollen record shows multi-centennial hydroclimatic anomalies during the last millennium, with wetter than present phases at 1155-1130, 865-670, and 215-80 cal yrs BP, and similar to present conditions between 1005 and 880 cal yrs BP. In contrast, the ISL record shows a wet phase during 1115-840 cal yrs BP, suggesting that meso-ecological processes were as important in vegetation turnover as regional hydroclimate anomalies. Wetter conditions derived from LRO partially overlap with the Medieval Climate Anomaly (865-670 cal yrs BP) and with the latest part of the Little Ice Age (215-80 cal yrs BP). Furthermore, no strong anthropogenic signal was identified possibly related to the remote location of the records. Palynological diversity analyses evidence increasing diversification of plant communities during wet events at both sites. In correlation to existing regional hydroclimatic records from the Western Andes, our precipitation reconstruction verifies that centennial-scale changes in the strength of the South American Summer Monsoon (SASM) and partial influence of El Nino-like (ENSO) conditions drove vegetation turnover in the Atacama Desert during the last millennium.
英文关键词	Atacama highlands ENSO last millennium pollen rodent middens South America South American Summer Monsoon
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000940693300001
WOS关键词	AMERICAN SUMMER MONSOON ; CENTRAL ANDES ; PALYNOLOGICAL RICHNESS ; ENVIRONMENTAL DYNAMICS ; CLIMATE HISTORY ; TROPICAL ANDES ; RODENT MIDDENS ; DESERT ; POLLEN ; ALTIPLANO
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/2XILL650/396838
推荐引用方式 GB/T 7714	Domic, Alejandra, I,De Porras, Maria Eugenia,Capriles, Jose M.,et al. Precipitation variability, vegetation turnover, and anthropogenic disturbance over the last millennium in the Atacama highlands of northern Chile (19°S)[J],2023,33(5):536-549.
APA	Domic, Alejandra, I,De Porras, Maria Eugenia,Capriles, Jose M.,Zamora-Allendes, Andres,Ivory, Sarah J.,&Maldonado, Antonio.(2023).Precipitation variability, vegetation turnover, and anthropogenic disturbance over the last millennium in the Atacama highlands of northern Chile (19°S).HOLOCENE,33(5),536-549.
MLA	Domic, Alejandra, I,et al."Precipitation variability, vegetation turnover, and anthropogenic disturbance over the last millennium in the Atacama highlands of northern Chile (19°S)".HOLOCENE 33.5(2023):536-549.