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New records and updated distributional patterns of macroalgae from the South Shetland Islands and northern Weddell Sea, Antarctica

Published online by Cambridge University Press:  04 August 2023

Franciane Pellizzari Open the ORCID record for Franciane Pellizzari [Opens in a new window] ,
João Pedro Dos Santos De Mello Open the ORCID record for João Pedro Dos Santos De Mello [Opens in a new window] ,
Michelle C. Santos-Silva Open the ORCID record for Michelle C. Santos-Silva [Opens in a new window] ,
Vanessa Sayuri Osaki Open the ORCID record for Vanessa Sayuri Osaki [Opens in a new window] ,
Frederico Pereira Brandini Open the ORCID record for Frederico Pereira Brandini [Opens in a new window] ,
Peter Convey Open the ORCID record for Peter Convey [Opens in a new window]  and
Luiz Henrique Rosa Open the ORCID record for Luiz Henrique Rosa [Opens in a new window]
Franciane Pellizzari*
Affiliation:
Phycology and Marine Water Quality Laboratory, Biological Sciences Department, Paraná State University (UNESPAR/campus Paranaguá), Comendador Correa Junior 117, 82203-280, Paranaguá, Paraná, Brazil
João Pedro Dos Santos De Mello
Affiliation:
Phycology and Marine Water Quality Laboratory, Biological Sciences Department, Paraná State University (UNESPAR/campus Paranaguá), Comendador Correa Junior 117, 82203-280, Paranaguá, Paraná, Brazil
Michelle C. Santos-Silva
Affiliation:
Marine Algae Laboratory, Institute of Biosciences, São Paulo University, São Paulo, Brazil
Vanessa Sayuri Osaki
Affiliation:
Marine Algae Laboratory, Institute of Biosciences, São Paulo University, São Paulo, Brazil
Frederico Pereira Brandini
Affiliation:
Oceanographic Institute, São Paulo University, São Paulo, Brazil
Peter Convey
Affiliation:
British Antarctic Survey, Cambridge, UK Department of Zoology, University of Johannesburg, Johannesburg, South Africa Biodiversity of Antarctic and Sub-Antarctic Ecosystems, Santiago, Chile Cape Horn International Center, Puerto Williams, Chile
Luiz Henrique Rosa
Affiliation:
Microbiology Department, Minas Gerais Federal University, Belo Horizonte, Brazil
*
franciane.pellizzari@unespar.edu.br
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Abstract

This study provides new species records (NRs) of macroalgal assemblages present in rocky habitats from the South Shetland Islands (SSI) and north-eastern Antarctic Peninsula (EAP), Weddell Sea. Surveys were conducted during the summers of 2013/2014 to 2017/2018 at Elephant, Deception, Half Moon and Vega islands. Data from the present study and those available in the literature from the western Antarctic Peninsula (WAP) were combined to provide an updated checklist, giving insights into macroecology and potential changes in thermohaline circulation patterns. A total of 48 macroalgal taxa were identified from our sampling, with eight representing NRs to the EAP sector of the Weddell Sea and five representing NRs to the SSI. Statistical differences among the assemblages from the SSI, WAP and EAP were identified. NRs, including opportunistic species and new information about the biogeographical distributions of species reported here, give insights into ecoregional connectivity and environmental changes. This study updates macroalgal diversity records in regions that are currently experiencing the impacts of climate change. Future and ongoing monitoring for conservation purposes is required to detect non-native species, new dispersal pathways and patterns related to thermohaline anomalies in Antarctic waters.

Keywords

biogeographyeastern Antarctic Peninsulaglobal changemacroecologyseaweedSouthern Ocean
Type
Biological Sciences
Information
Antarctic Science , Volume 35 , Issue 4 , August 2023 , pp. 243 - 255
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Copyright
Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of Antarctic Science Ltd

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