气候变化领域集成服务门户(CCPortal): Sediment drying-rewetting cycles enhance greenhouse gas emissions; nutrient and trace element release; and promote water cytogenotoxicity

CCPortal

DOI	10.1371/journal.pone.0231082
	Sediment drying-rewetting cycles enhance greenhouse gas emissions; nutrient and trace element release; and promote water cytogenotoxicity
	Paranaíba J.R.; Quadra G.; Josué I.I.P.; Almeida R.M.; Mendonça R.; Cardoso S.J.; Silva J.; Kosten S.; Campos J.M.; Almeida J.; Araújo R.L.; Roland F.; Barros N.
发表日期	2020
ISSN	19326203
卷号	15 期号:4
英文摘要	Increased periods of prolonged droughts followed by severe precipitation events are expected throughout South America due to climate change. Freshwater sediments are especially sensitive to these changing climate conditions. The increased oscillation of water levels in aquatic ecosystems causes enhanced cycles of sediment drying and rewetting. Here we experimentally evaluate the effects of induced drought followed by a rewetting event on the release of carbon dioxide (CO2), methane (CH4), nutrients (nitrogen and phosphorus), and trace elements (iron, manganese, and zinc) from the sediment of a tropical reservoir in southeastern Brazil. Furthermore, we used bulb onions (Allium cepa) to assess the potential cytogenotoxicity of the water overlying sediments after rewetting. We found peaks in CO2 and CH4 emissions when sediments first transitioned from wet to dry, with fluxes declining as sediments dried out. CO2 emissions peaked again upon rewetting, whereas CH4 emissions remained unaltered. Our experiment also revealed average increases by up to a factor of ~5000 in the release rates of nutrients and trace elements in water overlying sediments after rewetting. These increased release rates of potentially toxic compounds likely explain the lower replication of Allium cepa cells (up to 22% reduction) exposed to water overlying sediments after rewetting. Our findings suggest that increased events of drought followed by rewetting may lead to a range of changes in freshwater ecosystems, including nutrient enrichment, increased toxicity following resuspension of contaminants, and higher emission of greenhouse gases to the atmosphere. © 2020 Paranaíba et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
scopus关键词	carbon dioxide; fresh water; iron; manganese; methane; nitrogen; phosphorus; zinc; carbon dioxide; methane; mutagenic agent; nitrogen; phosphorus; trace element; water; air temperature; area under the curve; Article; atmosphere; biogeochemical cycle; Brazil; controlled study; cytogenotoxicity; cytotoxicity; drought; drying rewetting cycle; evaporation; genotoxicity; greenhouse gas; incubation time; limit of detection; nonhuman; onion; sediment; simulation; water sampling; cell death; chemistry; cytology; desiccation; diffusion; drug effect; greenhouse gas; mitosis index; sediment; Carbon Dioxide; Cell Death; Desiccation; Diffusion; Geologic Sediments; Greenhouse Gases; Methane; Mitotic Index; Mutagens; Nitrogen; Onions; Phosphorus; Trace Elements; Water
来源期刊	PLoS ONE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177016
作者单位	Laboratório de Ecologia Aquática, Programa de Pós-Graduação em Ecologia, Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil; Laboratório de Limnologia, Programa de Pós-Graduação em Ecologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil; Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, United States; Grupo Baccan de Química Analítica, Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil; Departamento de Engenharia Metalúrgica e de Minas, Instituto Nacional de Ciência e Tecnologia (INCT) Acqua, Escola de Engenharia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil; Department of Aquatic Ecology and Environmental Biology, Institute for Water and Wetland Research, Radboud University, Nijmegen, Netherlands; Laboratório de Genética e Biotecnologia, Universidade Federal de Juiz de Fora, Juiz de Fora, Brazil
推荐引用方式 GB/T 7714	Paranaíba J.R.,Quadra G.,Josué I.I.P.,et al. Sediment drying-rewetting cycles enhance greenhouse gas emissions; nutrient and trace element release; and promote water cytogenotoxicity[J],2020,15(4).
APA	Paranaíba J.R..,Quadra G..,Josué I.I.P..,Almeida R.M..,Mendonça R..,...&Barros N..(2020).Sediment drying-rewetting cycles enhance greenhouse gas emissions; nutrient and trace element release; and promote water cytogenotoxicity.PLoS ONE,15(4).
MLA	Paranaíba J.R.,et al."Sediment drying-rewetting cycles enhance greenhouse gas emissions; nutrient and trace element release; and promote water cytogenotoxicity".PLoS ONE 15.4(2020).