Macronutrients and dissolved iron in a land-ocean approach: influences of contamination by ore tailings in southeastern Brazil

Página do item simplificado
dc.creatorRenata Caiado Cagnin
dc.creatorCybelle Menolli Longhini
dc.creatorEduardo Schettini Costa
dc.creatorCesar Alexandro da Silva
dc.creatorStefano Zorzal-Almeida
dc.creatorDanniel Mendes
dc.creatorVanya Marcia Duarte Pasa
dc.creatorPaulo Jorge Sanches Barbeira
dc.creatorAlessandra Delazari-Barroso
dc.creatorBjörn Gücker
dc.creatorIola Gonçalves Boëchat
dc.creatorAna Teresa Lima
dc.creatorRenato Rodrigues Neto
dc.creatorFabian Sá
dc.creatorGilberto Fonseca Barroso
dc.date.accessioned2024-04-15T12:06:22Z
dc.date.accessioned2025-09-09T01:27:30Z
dc.date.available2024-04-15T12:06:22Z
dc.date.issued2022
dc.description.sponsorshipOutra Agência
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.3389/fmars.2022.990809
dc.identifier.issn2296-7745
dc.identifier.urihttps://hdl.handle.net/1843/67179
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofFrontiers in Marine Science
dc.rightsAcesso Aberto
dc.subjectNutrientes
dc.subjectFerro
dc.subjectFitoplancto
dc.subjectDoce, Rio (MG e ES)
dc.subjectÁgua - Poluição
dc.subjectResiduos - Eliminação no oceano
dc.subject.otherNutrients
dc.subject.otherIron
dc.subject.otherPhytoplankton
dc.subject.otherOre tailing
dc.subject.otherRiver
dc.subject.otherOcean contamination
dc.titleMacronutrients and dissolved iron in a land-ocean approach: influences of contamination by ore tailings in southeastern Brazil
dc.typeArtigo de periódico
local.citation.volume9
local.description.resumoRecently, many dam rupture disasters related to the mining industry have caused significant disruption to ecosystems globally. Contaminants, including nutrients in excess, can be transported from the river watersheds to the ocean in great quantities. In 2015, millions of m³ of iron ore tailings were released in the Doce River in southeastern Brazil, leading to several damaging effects to the river and marine ecosystem. So far, few studies have integrated the impact of these tailings on the river and the sea simultaneously. This research aims to provide a perspective on the macronutrients and iron concentrations and balance in the Doce River and the adjacent continental shelf, the related abiotic factors and the phytoplankton response under a new steady state of iron enrichment environment. The iron ore tailings increased the concentrations of nutrients in the river and on the continental shelf, especially for dissolved silica and iron. There was also a long-term indirect phosphorus enrichment associated to adsorption/desorption onto Fe-oxides and a nitrogen increase possibly due to N-fixing enhanced by iron. N fixation/remineralization predominates in the river watershed, while in the sea, the hydrodynamics provides nutrients supplied by the river and recycling from sediment resuspension. Nutrient ratios show DIP limitation in the river, while the complex marine environment brings both limitations on DIN, DIP, and DSi, as well as a stoichiometric equilibrium to the dataset. The phytoplankton response to the abiotic factors was more representative in the river watershed than on the continental shelf. This work emphasizes the importance of reporting local data for understanding global land-ocean nutrient fluxes and their potential influence on primary productivity and trophic chain balance.
local.identifier.orcidhttps://orcid.org/0000-0002-4811-4563
local.identifier.orcidhttps://orcid.org/0000-0002-6827-9314
local.identifier.orcidhttps://orcid.org/0000-0002-2510-3845
local.identifier.orcidhttps://orcid.org/0000-0002-0770-8680
local.identifier.orcidhttps://orcid.org/0000-0002-0884-8650
local.identifier.orcidhttps://orcid.org/0000-0001-6980-6553
local.identifier.orcidhttps://orcid.org/0000-0003-0803-4435
local.identifier.orcidhttps://orcid.org/0000-0003-3964-5685
local.identifier.orcidhttps://orcid.org/0000-0002-4886-4890
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.frontiersin.org/articles/10.3389/fmars.2022.990809/full

Arquivos

Pacote original

Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
Macronutrients and dissolved iron in a land ocean approach Influences of contamination by ore tailings in Southeastern Brazil (1).pdf
Tamanho:
8.04 MB
Formato:
Adobe Portable Document Format
Baixar

Licença do pacote

Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
License.txt
Tamanho:
1.99 KB
Formato:
Plain Text
Descrição:
Baixar

Coleções

Artigo de Periódico

Logo UFMG