Glacial melting: An overlooked threat to Antarctic krill

Strandings of marine animals are relatively common in marine systems. However, the underlying mechanisms are poorly understood. We observed mass strandings of krill in Antarctica that appeared to be linked to the presence of glacial meltwater. Climate-induced glacial meltwater leads to an increased...

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Autores principales: Fuentes, V., Alurralde, G., Meyer, B., Aguirre, G.E., Canepa, A., Wölfl, A.-C., Hass, H.C., Williams, G.N., Schloss, I.R.
Formato: JOUR
Materias:
Antarctica
aquatic species
coastal waters
deglaciation
Euphausia superba
experimental model
exposure
feeding
mortality
physiology
stomach content
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_20452322_v6_n_p_Fuentes
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_20452322_v6_n_p_Fuentes
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spelling todo:paper_20452322_v6_n_p_Fuentes2023-10-03T16:38:14Z Glacial melting: An overlooked threat to Antarctic krill Fuentes, V. Alurralde, G. Meyer, B. Aguirre, G.E. Canepa, A. Wölfl, A.-C. Hass, H.C. Williams, G.N. Schloss, I.R. Antarctica aquatic species coastal waters deglaciation Euphausia superba experimental model exposure feeding mortality physiology stomach content Strandings of marine animals are relatively common in marine systems. However, the underlying mechanisms are poorly understood. We observed mass strandings of krill in Antarctica that appeared to be linked to the presence of glacial meltwater. Climate-induced glacial meltwater leads to an increased occurrence of suspended particles in the sea, which is known to affect the physiology of aquatic organisms. Here, we study the effect of suspended inorganic particles on krill in relation to krill mortality events observed in Potter Cove, Antarctica, between 2003 and 2012. The experimental results showed that large quantities of lithogenic particles affected krill feeding, absorption capacity and performance after only 24 h of exposure. Negative effects were related to both the threshold concentrations and the size of the suspended particles. Analysis of the stomach contents of stranded krill showed large quantities of large particles (> 106 μm3), which were most likely mobilized by glacial meltwater. Ongoing climate-induced glacial melting may impact the coastal ecosystems of Antarctica that rely on krill. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_20452322_v6_n_p_Fuentes
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Antarctica
aquatic species
coastal waters
deglaciation
Euphausia superba
experimental model
exposure
feeding
mortality
physiology
stomach content
spellingShingle Antarctica
aquatic species
coastal waters
deglaciation
Euphausia superba
experimental model
exposure
feeding
mortality
physiology
stomach content
Fuentes, V.
Alurralde, G.
Meyer, B.
Aguirre, G.E.
Canepa, A.
Wölfl, A.-C.
Hass, H.C.
Williams, G.N.
Schloss, I.R.
Glacial melting: An overlooked threat to Antarctic krill
topic_facet Antarctica
aquatic species
coastal waters
deglaciation
Euphausia superba
experimental model
exposure
feeding
mortality
physiology
stomach content
description Strandings of marine animals are relatively common in marine systems. However, the underlying mechanisms are poorly understood. We observed mass strandings of krill in Antarctica that appeared to be linked to the presence of glacial meltwater. Climate-induced glacial meltwater leads to an increased occurrence of suspended particles in the sea, which is known to affect the physiology of aquatic organisms. Here, we study the effect of suspended inorganic particles on krill in relation to krill mortality events observed in Potter Cove, Antarctica, between 2003 and 2012. The experimental results showed that large quantities of lithogenic particles affected krill feeding, absorption capacity and performance after only 24 h of exposure. Negative effects were related to both the threshold concentrations and the size of the suspended particles. Analysis of the stomach contents of stranded krill showed large quantities of large particles (> 106 μm3), which were most likely mobilized by glacial meltwater. Ongoing climate-induced glacial melting may impact the coastal ecosystems of Antarctica that rely on krill.
format JOUR
author Fuentes, V.
Alurralde, G.
Meyer, B.
Aguirre, G.E.
Canepa, A.
Wölfl, A.-C.
Hass, H.C.
Williams, G.N.
Schloss, I.R.
author_facet Fuentes, V.
Alurralde, G.
Meyer, B.
Aguirre, G.E.
Canepa, A.
Wölfl, A.-C.
Hass, H.C.
Williams, G.N.
Schloss, I.R.
author_sort Fuentes, V.
title Glacial melting: An overlooked threat to Antarctic krill
title_short Glacial melting: An overlooked threat to Antarctic krill
title_full Glacial melting: An overlooked threat to Antarctic krill
title_fullStr Glacial melting: An overlooked threat to Antarctic krill
title_full_unstemmed Glacial melting: An overlooked threat to Antarctic krill
title_sort glacial melting: an overlooked threat to antarctic krill
url http://hdl.handle.net/20.500.12110/paper_20452322_v6_n_p_Fuentes
work_keys_str_mv AT fuentesv glacialmeltinganoverlookedthreattoantarctickrill
AT alurraldeg glacialmeltinganoverlookedthreattoantarctickrill
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AT hasshc glacialmeltinganoverlookedthreattoantarctickrill
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