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Extraordinarily high biomass benthic community on Southern Ocean
 

Summary: Extraordinarily high biomass benthic
community on Southern Ocean
seamounts
R. E. Thresher1
, J. Adkins2
, S. J. Fallon3
, K. Gowlett-Holmes1
, F. Althaus1
& A. Williams1
1
CSIRO Wealth from Oceans Flagship Program, GPO Box 1538, Hobart, Tasmania, 7001, Australia, 2
California Institute of
Technology, Pasadena, California, USA, 3
Research School of Earth Sciences, Australian National University, Canberra, ACT,
Australia.
We describe a previously unknown assemblage of seamount-associated megabenthos that has by far the
highest peak biomass reported in the deep-sea outside of vent communities. The assemblage was found at
depths of 22.5 km on rocky geomorphic features off the southeast coast of Australia, in an area near the
Sub-Antarctic Zone characterised by high rates of surface productivity and carbon export to the deep-ocean.
These conditions, and the taxa in the assemblage, are widely distributed around the Southern mid-latitudes,

  

Source: Adkins, Jess F. - Division of Geological and Planetary Sciences, California Institute of Technology

 

Collections: Environmental Sciences and Ecology; Geosciences