干旱区生态环境知识资源中心(Arid): Benthic microbial diversity trends in response to heavy metals in an oxygen-deficient eutrophic bay of the Humboldt current system offshore the Atacama Desert

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DOI	10.1016/j.envpol.2021.117281
	Benthic microbial diversity trends in response to heavy metals in an oxygen-deficient eutrophic bay of the Humboldt current system offshore the Atacama Desert
	Zarate, Ana; Dorador, Cristina; Valds, Jorge; Molina, Veronica; Icaza, Gonzalo; Pacheco, Aldo S.; Castillo, Alexis
通讯作者	Zarate, A (corresponding author), Univ Antofagasta, Doctorado Ciencias Aplicadas Mencinos Sistemas Ma, Antofagasta, Chile.
来源期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
EISSN	1873-6424
出版年	2021
卷号	286
英文摘要	Mejillones Bay is a coastal ecosystem situated in an oxygen-deficient upwelling area impacted by mining activities in the coastal desert region of northern Chile, where conspicuous microbial life develops in the sediments. Herein, heavy metal (loid)s (HMs) such as Cu, Pb, As, Zn, Al, Fe, Cd, Mo, Ni and V as well as benthic microbial communities were studied using spectrometry and iTag-16 S rRNA sequencing. Samples were taken from two contrasting sedimentary localities in the Bay named Punta Rieles (PR) and Punta Chacaya (PC) within 10-50 m water-depth gradient. PR sediments were organic matter rich (21.1% of TOM at 50 m) and overlaid with lowoxygen waters (<0.06 ml O2/L bottom layer) compared with PC. In general, HMs like Al, Ni, Cd, As and Pb tended to increase in concentration with depth in PR, while the opposite pattern was observed in PC. In addition, PR presented a higher number of unique families (72) compared to PC (35). Among the top ten microbial families, Desulfobulbaceae (4.6% vs. 3.2%), Flavobacteriaceae (2.8% vs. 2.3%) and Anaerolineaceae (3.3% vs. 2.3%) dominated in PR, meanwhile Actinomarinales_Unclassified (8.1% vs. 4.2%) and Sandaracinaceae (4.4% vs. 2.0%) were more abundant in PC. Multivariate analyses confirmed that water depth-related variation was a good proxy for oxygen conditions and metal concentrations, explaining the structure of benthic microbial assemblages. Cd, Ni, As and Pb showed uniformly positive associations with communities that represented the keystone taxa in the co-occurrence network, including Anaerolineaceae, Thiotrichaceae, Desulfobulbaceae, Desulfarculaceae and Bacteroidales_unclassified communities. Collectively, these findings provide new insights for establishing the ecological interconnections of benthic microorganisms in response to metal contamination in a coastal upwelling environment.
英文关键词	Semi-enclosed bay Marine sediment Microbial network assemblages Heavy metals
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000686601700002
WOS关键词	DEL-SUR BAY ; MINIMUM-ZONE ; COASTAL SEDIMENTS ; SURFACE SEDIMENTS ; MEJILLONES BAY ; NORTHERN CHILE ; BACTERIAL COMMUNITIES ; UPWELLING SYSTEM ; LAIZHOU BAY ; CONTAMINATION
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363135
作者单位	[Zarate, Ana] Univ Antofagasta, Doctorado Ciencias Aplicadas Mencinos Sistemas Ma, Antofagasta, Chile; [Zarate, Ana; Dorador, Cristina; Icaza, Gonzalo] Univ Antofagasta, Inst Antofagasta, Lab Complejidad Microbiana & Ecol Func, Antofagasta, Chile; [Zarate, Ana; Dorador, Cristina; Icaza, Gonzalo] Univ Antofagasta, Ctr Bioingn Biotecnol CeBiB, Antofagasta, Chile; [Dorador, Cristina] Univ Antofagasta, Fac Ciencias Mar & Recursos Biol, Dept Biotecnol, Antofagasta, Chile; [Valds, Jorge] Univ Antofagasta, Fac Ciencias Mar & Recursos Biol, Inst Ciencias Nat A Von Humboldt, Lab Sedimentol & Paleoambientes, Antofagasta, Chile; [Molina, Veronica] Univ Playa Ancha, Fac Ciencias Nat & Exactas, Observatorio Ecol Microbiana, Dept Biol, Valparaiso, Chile; [Molina, Veronica] Univ Playa Ancha, HUB Ambiental UPLA, Valparaiso, Chile; [Pacheco, Aldo S.] Univ Nacl Mayor San Marcos, Fac Ciencias Biol, Lima, Peru; [Castillo, Alexis] Univ Catolica Maule, Ctr Invest & Estudios Avanzados Maule, Vicerrectoria Invest Invest & Posgra...
推荐引用方式 GB/T 7714	Zarate, Ana,Dorador, Cristina,Valds, Jorge,et al. Benthic microbial diversity trends in response to heavy metals in an oxygen-deficient eutrophic bay of the Humboldt current system offshore the Atacama Desert[J],2021,286.
APA	Zarate, Ana.,Dorador, Cristina.,Valds, Jorge.,Molina, Veronica.,Icaza, Gonzalo.,...&Castillo, Alexis.(2021).Benthic microbial diversity trends in response to heavy metals in an oxygen-deficient eutrophic bay of the Humboldt current system offshore the Atacama Desert.ENVIRONMENTAL POLLUTION,286.
MLA	Zarate, Ana,et al."Benthic microbial diversity trends in response to heavy metals in an oxygen-deficient eutrophic bay of the Humboldt current system offshore the Atacama Desert".ENVIRONMENTAL POLLUTION 286(2021).