干旱区生态环境知识资源中心(Arid): Aquatic community structure as sentinel of recent environmental changes unraveled from lake sedimentary records from the Atacama Desert, Chile

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DOI	10.1371/journal.pone.0229453
	Aquatic community structure as sentinel of recent environmental changes unraveled from lake sedimentary records from the Atacama Desert, Chile
	Aranguiz-Acuna, Adriana 1; Luque, Jose A.2; Pizarro, Hector 2; Cerda, Mauricio 3,4; Heine-Fuster, Inger 1; Valdes, Jorge 5; Fernandez-Galego, Emma 6; Wennrich, Volker 6
通讯作者	Aranguiz-Acuna, Adriana
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2020
卷号	15 期号:2
英文摘要	The Atacama Desert (21-26 degrees S) is currently one of the driest places on Earth and metal(loid) s are of special concern for this region, which hosts the largest-known porphyry copper deposits produced in Chile. Evidence of past environmental conditions is commonly preserved in natural archives, such as lacustrine sediments. Sediment records obtained from Inca Coya Lake (22 degrees 20'S-68 degrees 35'W, 2534 m.a.s.l.), a small lake located in the Atacama Desert, reflected the evolution of regional mining activity during the 20th century and sedimentation associated with decadal climate variability. We studied the aquatic community structure changes recorded in sediment records from Inca Coya Lake. By analysis of magnetic properties (susceptibility, hysteresis curves and Curie temperatures), grain size and geochemical composition of the sediments, we identified environmental periods and changes in the community of benthic and planktonic organisms (diatoms and diapausing egg bank). We identified three detrital episodes that we interpret as dry/wet phases during the last 90 years associated with the increase of flash flood events promoting hypoxia oscillations; anthropogenic (mining activity) signals were also identified. Invertebrate community structure (primary consumers) reflected the metal exposure, measured as changes in assemblage composition through species turnover. Diatom community composition was best associated with variables related to wetter/drier alternation and consequent changes in oxygen availability. Bioindicators analyzed (diatoms, diapausing egg bank and invertebrate community) demonstrated to be excellent indicators of the bioavailability of compounds in the aquatic ecosystem of Inca Coya Lake, allowing the environmental impact assessment of the water resources due to flash floods and mining activity in the driest desert of the world.
类型	Article
语种	英语
国家	Chile ; Brazil ; Germany
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000526177800001
WOS关键词	ECOLOGICAL CHANGES ; NORTHERN CHILE ; CLIMATE-CHANGE ; RESPONSES ; MACROINVERTEBRATES ; PRECIPITATION ; VARIABILITY ; ENRICHMENT ; SPECIATION ; SELECTION
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315356
作者单位	1.Univ Catolica Norte, Ctr Invest Tecnol Agua Desierto CEITSAZA, Antofagasta, Chile; 2.Univ Catolica Norte, Dept Ciencias Geol, Antofagasta, Chile; 3.UFF, PPBMAC, Lab Biogeoquim Ambientes Aquat, Rio De Janeiro, Brazil; 4.UST, CiiCC, Santiago, Chile; 5.Univ Antofagasta, Inst Alexander von Humboldt, Antofagasta, Chile; 6.Univ Cologne, Inst Geol & Mineral, Cologne, Germany
推荐引用方式 GB/T 7714	Aranguiz-Acuna, Adriana,Luque, Jose A.,Pizarro, Hector,et al. Aquatic community structure as sentinel of recent environmental changes unraveled from lake sedimentary records from the Atacama Desert, Chile[J],2020,15(2).
APA	Aranguiz-Acuna, Adriana.,Luque, Jose A..,Pizarro, Hector.,Cerda, Mauricio.,Heine-Fuster, Inger.,...&Wennrich, Volker.(2020).Aquatic community structure as sentinel of recent environmental changes unraveled from lake sedimentary records from the Atacama Desert, Chile.PLOS ONE,15(2).
MLA	Aranguiz-Acuna, Adriana,et al."Aquatic community structure as sentinel of recent environmental changes unraveled from lake sedimentary records from the Atacama Desert, Chile".PLOS ONE 15.2(2020).