Rocky reef benthic assemblages in the Magellan Strait and the South Shetland Islands (Antarctica)

Subtidal reef communities from much of the world's coastline have been described in detail, but data from the world's most extensive subantarctic rocky reefs is scarce. The objective was to describe these southern coastal systems and measure the extent to which they vary in terms of fundam...

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Autores principales:	Newcombe,Emma M, Cárdenas,César A
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2011
Materias:	Macroalgae canopy hard substrates Magellan Region Southern Ocean
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572011000200007
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spelling	oai:scielo:S0718-195720110002000072011-11-07Rocky reef benthic assemblages in the Magellan Strait and the South Shetland Islands (Antarctica)Newcombe,Emma MCárdenas,César A Macroalgae canopy hard substrates Magellan Region Southern Ocean Subtidal reef communities from much of the world's coastline have been described in detail, but data from the world's most extensive subantarctic rocky reefs is scarce. The objective was to describe these southern coastal systems and measure the extent to which they vary in terms of fundamental measures of community structure. The Magellan Region constitutes an intermediate site between relatively well-studied temperate regions and Antarctica. Previous studies suggest that dominant canopy species may reflect different disturbance histories and associated communities may similarly be expected to vary structurally. We hypothesized that variation in subtidal sessile assemblages in the Magellan Strait, where Macrocystis pyrifera widely dominates, would be less than at Antarctic sites, where Desmarestia spp. or Himantothallus grandifolius may dominate depending on disturbance regimes. Our results showed that benthic assemblages in the Magellan Strait were similar where physical structure of the reef was similar, but differed strongly where reef form differed. At sites in South Shetland Islands, benthic assemblages differed in terms of dominant macroalgae and sessile community structure; however evidence that the Desmarestia -dominated site was more highly disturbed was equivocal. Shading produced by Macrocystis in Magellan Strait and ice effect in Antarctica are likely strong structuring factors in their respective communities, which would need to be considered when comparing community characteristics.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.46 n.2 20112011-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572011000200007en10.4067/S0718-19572011000200007
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Macroalgae canopy hard substrates Magellan Region Southern Ocean
spellingShingle	Macroalgae canopy hard substrates Magellan Region Southern Ocean Newcombe,Emma M Cárdenas,César A Rocky reef benthic assemblages in the Magellan Strait and the South Shetland Islands (Antarctica)
description	Subtidal reef communities from much of the world's coastline have been described in detail, but data from the world's most extensive subantarctic rocky reefs is scarce. The objective was to describe these southern coastal systems and measure the extent to which they vary in terms of fundamental measures of community structure. The Magellan Region constitutes an intermediate site between relatively well-studied temperate regions and Antarctica. Previous studies suggest that dominant canopy species may reflect different disturbance histories and associated communities may similarly be expected to vary structurally. We hypothesized that variation in subtidal sessile assemblages in the Magellan Strait, where Macrocystis pyrifera widely dominates, would be less than at Antarctic sites, where Desmarestia spp. or Himantothallus grandifolius may dominate depending on disturbance regimes. Our results showed that benthic assemblages in the Magellan Strait were similar where physical structure of the reef was similar, but differed strongly where reef form differed. At sites in South Shetland Islands, benthic assemblages differed in terms of dominant macroalgae and sessile community structure; however evidence that the Desmarestia -dominated site was more highly disturbed was equivocal. Shading produced by Macrocystis in Magellan Strait and ice effect in Antarctica are likely strong structuring factors in their respective communities, which would need to be considered when comparing community characteristics.
author	Newcombe,Emma M Cárdenas,César A
author_facet	Newcombe,Emma M Cárdenas,César A
author_sort	Newcombe,Emma M
title	Rocky reef benthic assemblages in the Magellan Strait and the South Shetland Islands (Antarctica)
title_short	Rocky reef benthic assemblages in the Magellan Strait and the South Shetland Islands (Antarctica)
title_full	Rocky reef benthic assemblages in the Magellan Strait and the South Shetland Islands (Antarctica)
title_fullStr	Rocky reef benthic assemblages in the Magellan Strait and the South Shetland Islands (Antarctica)
title_full_unstemmed	Rocky reef benthic assemblages in the Magellan Strait and the South Shetland Islands (Antarctica)
title_sort	rocky reef benthic assemblages in the magellan strait and the south shetland islands (antarctica)
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572011000200007
work_keys_str_mv	AT newcombeemmam rockyreefbenthicassemblagesinthemagellanstraitandthesouthshetlandislandsantarctica AT cardenascesara rockyreefbenthicassemblagesinthemagellanstraitandthesouthshetlandislandsantarctica
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Rocky reef benthic assemblages in the Magellan Strait and the South Shetland Islands (Antarctica)

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