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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2016
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20452322_v6_n_p_Fuentes http://hdl.handle.net/20.500.12110/paper_20452322_v6_n_p_Fuentes |
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paper:paper_20452322_v6_n_p_Fuentes2023-06-08T16:33:25Z Glacial melting: An overlooked threat to Antarctic krill 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. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20452322_v6_n_p_Fuentes 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 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. |
| 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 |
| publishDate |
2016 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20452322_v6_n_p_Fuentes http://hdl.handle.net/20.500.12110/paper_20452322_v6_n_p_Fuentes |
| _version_ |
1768545853638705152 |