The 2016 red tide crisis in southern Chile: Possible influence of the mass oceanic dumping of dead salmons.
Aquaculture
Ecological crisis
Harmful algal blooms
Ocean transport
Pollution control
Risk management
Journal
Marine pollution bulletin
ISSN: 1879-3363
Titre abrégé: Mar Pollut Bull
Pays: England
ID NLM: 0260231
Informations de publication
Date de publication:
Jan 2020
Jan 2020
Historique:
received:
23
10
2018
revised:
18
08
2019
accepted:
16
09
2019
pubmed:
1
12
2019
medline:
14
3
2020
entrez:
1
12
2019
Statut:
ppublish
Résumé
In 2016, a massive harmful algal bloom (HAB) of Alexandrium catenella around Chiloé island caused one of the major socio-ecological crisis in Chilean history. This red tide occurred in two distinct pulses, the second, most anomalous, bursting with extreme toxicity on the Pacific coast, weeks after the highly controversial dumping off Chiloé of 4,700 t of rotting salmons, killed by a previous HAB of Pseudochattonella verruculosa. We study the transport of this pollution, analyzing the physical oceanographic conditions during and after the dumping. We find that a cyclonic gyre was present between the dumping site and the coast, visible in satellite altimetry and sea surface temperature data. Using Lagrangian simulations, we confirm that near-surface currents could have brought part of the pollution to the coast, and fueled the bloom. This scenario explains also the anomalous later finding of ammonium near Chiloé. Finally we discuss the mismanagement of risk throughout the events.
Identifiants
pubmed: 31784267
pii: S0025-326X(19)30751-9
doi: 10.1016/j.marpolbul.2019.110603
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
110603Informations de copyright
Copyright © 2019 Elsevier Ltd. All rights reserved.