Namir Gabriely Matos Lopes, Eliemar Campostrini, Marcel Giovanni Costa França
{"title":"Residues from the Fundão Dam Accident in Brazil and their Effects on Photosynthetic Efficiency of Two Restinga Plant Species","authors":"Namir Gabriely Matos Lopes, Eliemar Campostrini, Marcel Giovanni Costa França","doi":"10.1007/s00244-024-01079-5","DOIUrl":null,"url":null,"abstract":"<div><p>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 <i>a</i> fluorescence (ChlF) in <i>Allagoptera arenaria</i> and <i>Guapira pernambucensis</i> 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 <i>A. arenaria</i> and <i>G. pernambucensis</i> were selected at each site for nutritional and chlorophyll <i>a</i> fluorescence analysis. Five years after the dam rupture, <i>A. arenaria</i> and <i>G. pernambucensis</i> 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, <i>A. arenaria</i> at Biological Reserve of Comboios (RBC) during the rainy season showed increases in the values of maximum quantum yield of PSII photochemistry (φP<sub>0</sub>) and total performance index on absorption basis (PI<sub>TOTAL</sub>). These changes indicated more efficient tolerance mechanisms for increases in the concentrations of As, Pb, and V than those observed in <i>G. pernambucensis</i>. It was concluded that <i>A. arenaria</i> and <i>G. pernambucensis</i> exhibited an acclimation strategy in response to increased absorption of metal(loid)s.</p></div>","PeriodicalId":8377,"journal":{"name":"Archives of Environmental Contamination and Toxicology","volume":"87 2","pages":""},"PeriodicalIF":3.7000,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Archives of Environmental Contamination and Toxicology","FirstCategoryId":"93","ListUrlMain":"https://link.springer.com/article/10.1007/s00244-024-01079-5","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0
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.
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.