Massive salp outbreaks in the inner sea of Chiloé Island (Southern Chile): possible causes and ecological consequences

During 2010 several massive salp outbreaks of the Subantarctic species Ihlea magalhanica were recorded in the inner sea of Chiloé Island (ISCh, Southern Chile), affecting both phytoplankton abundance and salmon farmers by causing high fish mortality. First outbreaks were recorded during February 201...

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Autores principales:	Giesecke,Ricardo, Clement,Alejandro, Garcés-Vargas,José, Mardones,Jorge I, González,Humberto E, Caputo,Luciano, Castro,Leonardo
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2014
Materias:	Ihlea magalhanica outbreak salmon mortality Chiloé Island southern Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000300018
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spelling	oai:scielo:S0718-560X20140003000182014-10-10Massive salp outbreaks in the inner sea of Chiloé Island (Southern Chile): possible causes and ecological consequencesGiesecke,RicardoClement,AlejandroGarcés-Vargas,JoséMardones,Jorge IGonzález,Humberto ECaputo,LucianoCastro,Leonardo Ihlea magalhanica outbreak salmon mortality Chiloé Island southern Chile During 2010 several massive salp outbreaks of the Subantarctic species Ihlea magalhanica were recorded in the inner sea of Chiloé Island (ISCh, Southern Chile), affecting both phytoplankton abundance and salmon farmers by causing high fish mortality. First outbreaks were recorded during February 2010 when Ihlea magalhanica reached up to 654,000 ind m-3 close to the net pens in Maillen Island and consecutive outbreaks could be followed during March and from October to November 2010. One month prior to the first recorded salp outbreak, the adjacent oceanic region and ISCh showed a sharp decline of ca. 1.0°C in sea surface temperature and an atypical pattern of oceanic sea surface currents, changing from a predominantly meridional (northward) to a zonal (eastward) direction, probably causing a massive Subantarctic Water parcel to enter the ISCh. During the outbreaks, surface chlorophyll concentration decreased from an historical mean of 13.8 to less than 4 mg Chl-a m-3, and did not return to normal conditions throughout the entire year, and similar results were also observed in phytoplankton abundance. The abundance of salp aggregations were highest close to the salmon net pens, which acted as physical barriers, and may have favored the successful reproduction and persistence of the outbreaks during 2010. The possible impact of these outbreaks on phytoplankton quality and quantity, as well as potential scenarios for the development of further outbreaks is discussed.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.42 n.3 20142014-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000300018en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Ihlea magalhanica outbreak salmon mortality Chiloé Island southern Chile
spellingShingle	Ihlea magalhanica outbreak salmon mortality Chiloé Island southern Chile Giesecke,Ricardo Clement,Alejandro Garcés-Vargas,José Mardones,Jorge I González,Humberto E Caputo,Luciano Castro,Leonardo Massive salp outbreaks in the inner sea of Chiloé Island (Southern Chile): possible causes and ecological consequences
description	During 2010 several massive salp outbreaks of the Subantarctic species Ihlea magalhanica were recorded in the inner sea of Chiloé Island (ISCh, Southern Chile), affecting both phytoplankton abundance and salmon farmers by causing high fish mortality. First outbreaks were recorded during February 2010 when Ihlea magalhanica reached up to 654,000 ind m-3 close to the net pens in Maillen Island and consecutive outbreaks could be followed during March and from October to November 2010. One month prior to the first recorded salp outbreak, the adjacent oceanic region and ISCh showed a sharp decline of ca. 1.0°C in sea surface temperature and an atypical pattern of oceanic sea surface currents, changing from a predominantly meridional (northward) to a zonal (eastward) direction, probably causing a massive Subantarctic Water parcel to enter the ISCh. During the outbreaks, surface chlorophyll concentration decreased from an historical mean of 13.8 to less than 4 mg Chl-a m-3, and did not return to normal conditions throughout the entire year, and similar results were also observed in phytoplankton abundance. The abundance of salp aggregations were highest close to the salmon net pens, which acted as physical barriers, and may have favored the successful reproduction and persistence of the outbreaks during 2010. The possible impact of these outbreaks on phytoplankton quality and quantity, as well as potential scenarios for the development of further outbreaks is discussed.
author	Giesecke,Ricardo Clement,Alejandro Garcés-Vargas,José Mardones,Jorge I González,Humberto E Caputo,Luciano Castro,Leonardo
author_facet	Giesecke,Ricardo Clement,Alejandro Garcés-Vargas,José Mardones,Jorge I González,Humberto E Caputo,Luciano Castro,Leonardo
author_sort	Giesecke,Ricardo
title	Massive salp outbreaks in the inner sea of Chiloé Island (Southern Chile): possible causes and ecological consequences
title_short	Massive salp outbreaks in the inner sea of Chiloé Island (Southern Chile): possible causes and ecological consequences
title_full	Massive salp outbreaks in the inner sea of Chiloé Island (Southern Chile): possible causes and ecological consequences
title_fullStr	Massive salp outbreaks in the inner sea of Chiloé Island (Southern Chile): possible causes and ecological consequences
title_full_unstemmed	Massive salp outbreaks in the inner sea of Chiloé Island (Southern Chile): possible causes and ecological consequences
title_sort	massive salp outbreaks in the inner sea of chiloé island (southern chile): possible causes and ecological consequences
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000300018
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Massive salp outbreaks in the inner sea of Chiloé Island (Southern Chile): possible causes and ecological consequences

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