Benthic megafauna of the nearshore zone of Martel Inlet (King George Island, South Shetland Islands, Antarctica): Depth zonation and underwater observations

The benthic megafauna from the soft bottoms of the shallow coastal zone of Martel Inlet (Admiralty Bay, King George Island, South Shetland Islands, Antarctica) was studied during three austral summers (1989/1990, 1990/1991 and 1994/1995) in relation to the bathymetric features. Surveying and samplin...

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Bibliographic Details
Published in:Polar Biology
Main Authors: Nonato, E. F., Brito, TAS, De Paiva, P. C., Petti, MAV, Corbisier, T. N.
Other Authors: Universidade Federal de São Paulo (UNIFESP), CNPq, Universidade Federal do Rio de Janeiro (UFRJ)
Format: Article in Journal/Newspaper
Language:English
Published: Springer 2000
Subjects:
Admiralty Bay
Austral
King George Island
Martel
Martel Inlet
South Shetland Islands
Antarc*
Antarctica
antartic*
Polar Biology
Online Access:http://repositorio.unifesp.br/handle/11600/26349
https://doi.org/10.1007/s003000000129
Description
Summary:The benthic megafauna from the soft bottoms of the shallow coastal zone of Martel Inlet (Admiralty Bay, King George Island, South Shetland Islands, Antarctica) was studied during three austral summers (1989/1990, 1990/1991 and 1994/1995) in relation to the bathymetric features. Surveying and sampling, based on specimen counting and underwater observations, were undertaken by scuba-diving at depths down to 25 m. the depth zonation appears to be influenced by the nature of the substrate and especially by the action of the ice. the multiple action of ice flows prevents the occurrence of sessile forms in the shallower areas, where a low-diversity community, dominated by motile animals, was found. in the area around Is m in depth, the action of icebergs generated faunistic and sedimentary patches of impacted and non-impacted areas. the more stable conditions prevailing below depths of 20-25 m allowed the establishment of a more diversified epifauna, including many sessile forms. the interannual differences observed in the densities of the mobile isopod Serolis polita may be associated with the summer period when the sampling was undertaken. Universidade Federal de São Paulo, Inst Oceanog, Dept Oceanog Biol, BR-05508900 São Paulo, Brazil CNPq, Programa Antartico Brasileiro, Directoria Programas Especias, BR-70740901 Brasilia, DF, Brazil Fed Univ Rio de Janeiro, Inst Biol, Dept Zool, Rio de Janeiro, Brazil Universidade Federal de São Paulo, Inst Oceanog, Dept Oceanog Biol, BR-05508900 São Paulo, Brazil Web of Science

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