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Species diversity, spatial distribution, and assemblages of zooplankton within the Strait of Magellan in austral summer

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Abstract

The main aim of this work was to identify zooplankton assemblages by means of statistical testing and associate them with hydrographic properties of the Strait of Magellan and its microbasins. Zooplankton samples were collected by the R/V Cariboo in late austral summer 1991. Nineteen stations were sampled by BIONESS from the surface layer to 900 m depth, along the main longitudinal axis of the Strait of Magellan. There was a marked regional-scale pattern in zooplankton species diversity and richness, related to the hydrographical features of the Strait and its sub-basins. Six groups of samples were identified by cluster analysis in terms of zooplankton structure, and related to sea-water properties of temperature, salinity, and Chl a (Sperman’s correlation coefficient). Plankton assemblages of the Strait of Magellan seem closely linked to the remote sub-Antarctic and adjacent ocean biota, but populations may have independent evolutionary lines and population dynamics.

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Acknowledgments

Logistical and financial support for this paper were given by the Italian National Program of Research in Antarctica (PNRA). Many thanks are due to Prof. Ken G. McKenzie (1928–2003), University of Melbourne, a prominent scientist in the field of Ostracod taxonomy and ecology and to Dr. Giorgio Benassi for support in ostracod species diagnosis. We are grateful to Susannah Buchan, Department of Oceanography, University of Concepcion, for editing the last version of this MS.

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Authors and Affiliations

  1. Dipartimento di Biologia Animale ed Ecologia Marina, Università di Messina, Viale Ferdinando Stagno d’Alcontres 31, 98166, S. Agata Messina, Italy

    Giacomo Zagami, Antonia Granata, Raffaella Sitran, Roberta Minutoli & Letterio Guglielmo

  2. Departamento de Oceanografía, Universidad de Concepción, P.O.Box 4010, Concepción, Chile

    Tarcisio Antezana

  3. Dipartimento di Scienze Ambientali, Università degli Studi di Parma, Parco Area delle Scienze 11/A, 43100, Parma, Italy

    Ireneo Ferrari

Authors
  1. Giacomo Zagami
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  2. Tarcisio Antezana
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  3. Ireneo Ferrari
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  5. Raffaella Sitran
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  6. Roberta Minutoli
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  7. Letterio Guglielmo
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Correspondence to Letterio Guglielmo.

Additional information

This article belongs to a special topic: a number of articles coordinated by L. Guglielmo and V. Saggiomo appear in this issue of Polar Biology and are a result of two workshops on “The pelagic ecosystem of the Strait of Magellan” held in August 2008 and 2009 in Capo Calava` Village, Messina, Italy.

This article belongs to the special issue “Pelagic Ecology of the Strait of Magellan”, coordinated by L. Guglielmo and V. Saggiomo

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Zagami, G., Antezana, T., Ferrari, I. et al. Species diversity, spatial distribution, and assemblages of zooplankton within the Strait of Magellan in austral summer. Polar Biol 34, 1319–1333 (2011). https://doi.org/10.1007/s00300-011-0962-9

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  • DOI: https://doi.org/10.1007/s00300-011-0962-9

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