Attenuation of wind intensities exacerbates anoxic conditions leading to sulfur plume development off the coast of Peru.
Journal
PloS one
ISSN: 1932-6203
Titre abrégé: PLoS One
Pays: United States
ID NLM: 101285081
Informations de publication
Date de publication:
2023
2023
Historique:
received:
24
05
2022
accepted:
15
06
2023
medline:
1
9
2023
pubmed:
30
8
2023
entrez:
30
8
2023
Statut:
epublish
Résumé
The release of vast quantities of sulfide from the sediment into the water column, known as a sulfidic event, has detrimental consequences on fish catches, including downstream effects on other linked element cycles. Despite being frequent occurrences in marine upwelling regions, our understanding of the factors that moderate sulfidic event formation and termination are still rudimentary. Here, we examined the biogeochemical and hydrodynamic conditions that underpinned the formation/termination of one of the largest sulfur plumes to be reported in the Peruvian upwelling zone. Consistent with previous research, we find that the sulfur-rich plume arose during the austral summer when anoxic conditions (i.e., oxygen and nitrate depletion) prevailed in waters overlying the upper shelf. Furthermore, the shelf sediments were organically charged and characterized by low iron-bound sulfur concentrations, further enabling the diffusion of benthic-generated sulfide into the water column. While these biogeochemical conditions provided a predicate to sulfidic event formation, we highlight that attenuations in local wind intensity served as an event trigger. Namely, interruptions in local wind speed constrained upwelling intensity, causing increased stratification over the upper shelf. Moreover, disturbances in local wind patterns likely placed additional constraints on wind-driven mesoscale eddy propagation, with feedback effects on coastal elemental sulfur plume (ESP) formation. We suggest ESP development occurs as a result of a complex interaction of biogeochemistry with regional hydrodynamics.
Identifiants
pubmed: 37647254
doi: 10.1371/journal.pone.0287914
pii: PONE-D-22-14284
pmc: PMC10468053
doi:
Substances chimiques
Sulfur
70FD1KFU70
Sulfides
0
Water
059QF0KO0R
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
e0287914Informations de copyright
Copyright: © 2023 Flores 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.
Déclaration de conflit d'intérêts
The authors have declared that no competing interests exist.
Références
Environ Microbiol Rep. 2017 Aug;9(4):323-344
pubmed: 28419734
Science. 1999 Apr 16;284(5413):493-5
pubmed: 10205058
Sci Rep. 2018 Aug 23;8(1):12642
pubmed: 30140004
PLoS One. 2013 Aug 21;8(8):e68661
pubmed: 23990875
Nature. 2009 Jan 29;457(7229):581-4
pubmed: 19078958
Nat Rev Microbiol. 2012 May 14;10(6):381-94
pubmed: 22580367
Appl Environ Microbiol. 2019 Nov 27;85(24):
pubmed: 31585991
Nat Commun. 2021 Mar 11;12(1):1604
pubmed: 33707435
Nature. 2000 Nov 16;408(6810):346-9
pubmed: 11099038
PLoS One. 2017 Dec 13;12(12):e0188371
pubmed: 29236755
Nat Commun. 2018 Apr 30;9(1):1729
pubmed: 29712903
PLoS One. 2018 Feb 8;13(2):e0192140
pubmed: 29420587
Sci Total Environ. 2020 Jun 15;721:137718
pubmed: 32179345
Environ Microbiol. 2021 Jun;23(6):2834-2857
pubmed: 33000514
Science. 2010 Dec 3;330(6009):1375-8
pubmed: 21071631
S Afr Med J. 1954 May 1;28(18):381
pubmed: 13168630