The effect of non-linear internal waves on the growth of Antarctic sponges


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Claudio.Richter [ at ] awi.de

Abstract

Non-linear internal waves (NLIW or solitons) are generated where strong tidal flows interact with bottom topography in stratified waters. Here we report on solitons of exceptional amplitude (>200 m) in the Antarctic peninsula region enhancing diapycnal mixing of nutrients. Production, vertical export and microbial remineralisation of phytoplankton may help sustain vigorous growth of hexactinellid sponges following the collapse of the Larsen A ice shelf. While resuspension of bedload material may help extend favorable growth conditions and aid dispersal of propagules, sponges knocked over in the direction of occasional jets >1m/s testify to the importance of rare events in shaping Antarctic megafaunal communities.



Item Type
Conference (Poster)
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Primary Division
Programs
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Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
Ocean Sciences Meeting, 21 Feb 2016 - 26 Feb 2016, New Orleans, Lousiana, USA.
Eprint ID
40726
Cite as
Richter, C. and Fillinger, L. (2016): The effect of non-linear internal waves on the growth of Antarctic sponges , Ocean Sciences Meeting, New Orleans, Lousiana, USA, 21 February 2016 - 26 February 2016 .


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