Residues from the Fundão Dam Accident in Brazil and their Effects on Photosynthetic Efficiency of Two Restinga Plant Species

IF 3.7 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Archives of Environmental Contamination and Toxicology Pub Date : 2024-07-29 DOI:10.1007/s00244-024-01079-5
Namir Gabriely Matos Lopes, Eliemar Campostrini, Marcel Giovanni Costa França
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Abstract

In 2015, a breach in the Fundão Dam in Mariana (Minas Gerais State, Brazil) resulted in the release of contaminated tailings into the Doce River basin. This accident increased the concentrations of arsenic (As), lead (Pb), cadmium (Cd), vanadium (V), and manganese (Mn) in the soil, posing a potential hazard to the physiology of native species. The purpose of this study was to assess whether chlorophyll a fluorescence (ChlF) in Allagoptera arenaria and Guapira pernambucensis changed following this accident when tested under different precipitation regimes in relation to soil properties and metal(loid) absorption. Our research was conducted in two sites located in the state of Espírito Santo in southeastern Brazil. Five independent biological replicates of A. arenaria and G. pernambucensis were selected at each site for nutritional and chlorophyll a fluorescence analysis. Five years after the dam rupture, A. arenaria and G. pernambucensis had absorbed As, Pb, and V. The increased amounts of metal(loid)s absorbed did not significantly impair the OJIP curve configuration for either species during the evaluated periods. However, A. arenaria at Biological Reserve of Comboios (RBC) during the rainy season showed increases in the values of maximum quantum yield of PSII photochemistry (φP0) and total performance index on absorption basis (PITOTAL). These changes indicated more efficient tolerance mechanisms for increases in the concentrations of As, Pb, and V than those observed in G. pernambucensis. It was concluded that A. arenaria and G. pernambucensis exhibited an acclimation strategy in response to increased absorption of metal(loid)s.

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巴西 Fundão 大坝事故残留物及其对两种 Restinga 植物光合效率的影响。
2015 年,马里亚纳(巴西米纳斯吉拉斯州)的 Fundão 大坝发生溃坝事故,导致受污染的尾矿流入多塞河流域。这次事故增加了土壤中砷(As)、铅(Pb)、镉(Cd)、钒(V)和锰(Mn)的浓度,对本地物种的生理构成了潜在危害。本研究的目的是评估 Allagoptera arenaria 和 Guapira pernambucensis 的叶绿素 a 荧光(ChlF)在事故发生后,在不同降水条件下的测试是否会发生变化,这与土壤特性和金属(loid)吸收有关。我们的研究在巴西东南部圣埃斯皮里图州的两个地点进行。在每个地点选取了五个独立的 A. arenaria 和 G. pernambucensis 生物复制样本,进行营养和叶绿素 a 荧光分析。大坝决堤五年后,A. arenaria 和 G. pernambucensis 吸收了 As、Pb 和 V。不过,在雨季期间,康波伊奥斯生物保护区(RBC)的 A. arenaria 显示出 PSII 光化学最大量子产率(φP0)和吸收基础上的总性能指数(PITOTAL)值的增加。这些变化表明,与在 G. pernambucensis 中观察到的变化相比,A. arenaria 对 As、Pb 和 V 的浓度增加具有更有效的耐受机制。结论是,A. arenaria 和 G. pernambucensis 对金属吸收量的增加表现出一种适应策略。
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来源期刊
CiteScore
7.00
自引率
2.50%
发文量
63
审稿时长
8-16 weeks
期刊介绍: Archives of Environmental Contamination and Toxicology provides a place for the publication of timely, detailed, and definitive scientific studies pertaining to the source, transport, fate and / or effects of contaminants in the environment. The journal will consider submissions dealing with new analytical and toxicological techniques that advance our understanding of the source, transport, fate and / or effects of contaminants in the environment. AECT will now consider mini-reviews (where length including references is less than 5,000 words), which highlight case studies, a geographic topic of interest, or a timely subject of debate. AECT will also consider Special Issues on subjects of broad interest. The journal strongly encourages authors to ensure that their submission places a strong emphasis on ecosystem processes; submissions limited to technical aspects of such areas as toxicity testing for single chemicals, wastewater effluent characterization, human occupation exposure, or agricultural phytotoxicity are unlikely to be considered.
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