2014
DOI: 10.3856/vol42-issue3-fulltext-18
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Massive salp outbreaks in the inner sea of Chiloe Island (Southern Chile): possible causes and ecological consequences

Abstract: ABSTRACT. 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 t… Show more

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Cited by 15 publications
(8 citation statements)
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“…During 2010 and 2012, both models predicted a decrease in BW abundance in CGMC (Figures 3 and 4). For both years, a drop in chl-a concentration during previous spring, a decrease in SST (for 2010), a decrease in the number of TF detected and salp outbreaks were observed ( Figure S1.5, Buchan & Quiñones, 2016;Giesecke et al, 2014;Lara, Saldías, Tapia, Iriarte, & Broitman, 2016). These changes in oceanographic characteristics within CNP were hypothesized to be produced by an atypical pattern of oceanic sea surface currents mediated by negative anomalies in southern annular mode (SAM, Giesecke et al, 2014).…”
Section: Interannual Differences In Bw Abundance and Distributionmentioning
confidence: 95%
See 1 more Smart Citation
“…During 2010 and 2012, both models predicted a decrease in BW abundance in CGMC (Figures 3 and 4). For both years, a drop in chl-a concentration during previous spring, a decrease in SST (for 2010), a decrease in the number of TF detected and salp outbreaks were observed ( Figure S1.5, Buchan & Quiñones, 2016;Giesecke et al, 2014;Lara, Saldías, Tapia, Iriarte, & Broitman, 2016). These changes in oceanographic characteristics within CNP were hypothesized to be produced by an atypical pattern of oceanic sea surface currents mediated by negative anomalies in southern annular mode (SAM, Giesecke et al, 2014).…”
Section: Interannual Differences In Bw Abundance and Distributionmentioning
confidence: 95%
“…For both years, a drop in chl-a concentration during previous spring, a decrease in SST (for 2010), a decrease in the number of TF detected and salp outbreaks were observed ( Figure S1.5, Buchan & Quiñones, 2016;Giesecke et al, 2014;Lara, Saldías, Tapia, Iriarte, & Broitman, 2016). These changes in oceanographic characteristics within CNP were hypothesized to be produced by an atypical pattern of oceanic sea surface currents mediated by negative anomalies in southern annular mode (SAM, Giesecke et al, 2014). SAM modulates intraseasonal to interannual changes in atmospheric conditions in the Southern Hemisphere, producing shifts in the westerly winds patterns and a significant decrease in SST in subtropical zones during negative anomalies (Hall & Visbeck, 2002;Marshall 2003;Lovenduski & Gruber, 2005) which did occur during 2010 and 2012 ( Figure S1.6).…”
Section: Interannual Differences In Bw Abundance and Distributionmentioning
confidence: 98%
“…Regarding the relative input of SASW, the ocean offshore of northern Patagonia is sensitive to the latitudinal position of the bifurcation of the west wind drift (WWD) which can be a macro scale indicator of oceanographic and meteorological variability (Gatica et al, 2009). There is also evidence for episodic decreases in sea surface temperature in the Inner Sea of Chiloé associated with a shift of sea surface currents to a zonal direction and the entry of large "parcels" of subantarctic water (Giesecke et al, 2014) which have been responsible for mass occurrence of salps, decreases in chlorophyll-a, and changes in phytoplankton community structure (Giesecke et al, 2014). A weakening in the annual cycle of chlorophyll-a concentration and abnormally cold sea surface temperature in the Inner Sea of Chiloé during 2009-2010 has also been linked to transient large-scale climate forcing (Lara et al, 2016).…”
Section: Latitudinal Shifts In Water Column Propertiesmentioning
confidence: 99%
“…They generate episodic but intense downward fluxes of faecal pellets and dead bodies (Lebrato et al 2012, Henschke et al 2013, Smith et al 2014 and serve as prey and/or hosts for many pelagic and benthic organisms (Harbison 1998). Salp blooms can have important economic impacts as well, as high salp densities can (1) negatively impact fish farms (Giesecke et al 2014), (2) clog the cooling systems of power plants and (3) potentially reduce tourism due to their jellyfish-like appearance (Boero et al 2013). These adverse effects explain the growing interest in understanding the mechanisms that drive salp blooms.…”
Section: Introductionmentioning
confidence: 99%