Recent massive invasions of the circumboreal sea anemone Metridium senile in North and South Patagonia

The circumboreal sea anemone species Metridium senile is a non-native species in Chilean Patagonia. The species is responsible for the occupation of large tracts of benthic substrate, threatening benthic resources such as sea urchins and barnacles. It has potentially devastating ecological impact on...

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Veröffentlicht in:Biological invasions 2022-12, Vol.24 (12), p.3665-3674
Hauptverfasser: Häussermann, Vreni, Molinet, Carlos, Díaz Gómez, Manuel, Försterra, Günter, Henríquez, Jorge, Espinoza Cea, Katherine, Matamala Ascencio, Thamara, Hüne, Mathias, Cárdenas, Cesar A., Glon, Heather, Barahona Toledo, Nancy, Subiabre Mena, Dagoberto
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container_end_page 3674
container_issue 12
container_start_page 3665
container_title Biological invasions
container_volume 24
creator Häussermann, Vreni
Molinet, Carlos
Díaz Gómez, Manuel
Försterra, Günter
Henríquez, Jorge
Espinoza Cea, Katherine
Matamala Ascencio, Thamara
Hüne, Mathias
Cárdenas, Cesar A.
Glon, Heather
Barahona Toledo, Nancy
Subiabre Mena, Dagoberto
description The circumboreal sea anemone species Metridium senile is a non-native species in Chilean Patagonia. The species is responsible for the occupation of large tracts of benthic substrate, threatening benthic resources such as sea urchins and barnacles. It has potentially devastating ecological impact on the overall benthic community. Species associated to the genus Metridium have been alluded to in the historical literature on Chilean marine life by various names. We summarize and evaluate their appearance in the literature and suggest eliminating the name Metridium senile lobatum for the South American subspecies. The first appearance of Metridium senile was confirmed in 2005 by the authors from Central Patagonia. Subsequently it was noted as abundant at multiple sites. In North Patagonia, it was first recorded from one site in 2011, followed by one more record in 2013 and several in 2015. In subsequent years, it has been recorded at an increasing number of sites based on our surveying. During our most recent surveys in 2021, we confirmed that it remains abundant at numerous sites throughout North Patagonia. In South Patagonia, it was first reported in 2015 from one site in the Straits of Magellan, and from two further sites around Cape Horn in 2017. It has not been recorded at additional sites nor has it significantly increased in abundance in southern Chilean Patagonia. However, it has been observed to be common at the Becasses Islands in the Argentinean part of Beagle Channel in 2021. Therefore, we recommend starting a monitoring program and putting restrictions on the transport of benthic invertebrates to avoid introducing the species to sites where it is not present yet.
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identifier ISSN: 1387-3547
ispartof Biological invasions, 2022-12, Vol.24 (12), p.3665-3674
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subjects Benthic fauna
Biodiversity
Biomedical and Life Sciences
Developmental Biology
Ecology
Freshwater & Marine Ecology
Indigenous species
Introduced species
Invasion Note
Life Sciences
Metridium senile
Plant Sciences
Sea urchins
Substrates
title Recent massive invasions of the circumboreal sea anemone Metridium senile in North and South Patagonia
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