Marine Macroalgal Diversity in Admiralty Bay, King George Island, South Shetlands Islands, Antarctica

Yoneshigue‐Valentin, Yocie; Silva, Ingrid Balesteros; Fujii, Mutuê T.; Yokoya, Nair S.; Pupo, Diclá; Guimarães, Sílvia; Martins, Aline P.; Sanches, Paola Frazan; Pereira, Dinaelza Castelo; Dalto, Adriana Galindo; Souza, Jônatas M. C.; Pereira, Cláudio M. P.; Pellizzari, Franciane; Colepicolo, Pio

doi:10.4322/apa.2014.112

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Twelve seaweed species have been reported in the literature as new additions to the Antarctic flora (Clayton et al 1997, Gallardo et al 1999, Wiencke and Clayton 2002, Yoneshigue-Valentin et al 2013, Pellizzari et al 2017. Our study indicates that some of these species are, in fact, non-native (see below).…”

Section: Discussionsupporting

confidence: 51%

“…In recent years and decades, novel and non-native seaweed species have been reported from Antarctic sites (Clayton et al 1997, Gallardo et al 1999, Wiencke and Clayton 2002, Yoneshigue-Valentin et al 2013, Pellizzari et al 2017. Seaweeds are highly important ecosystem engineers and provide invaluable ecosystem services to coastal marine habitats throughout all ecoregions.…”

Section: Introductionmentioning

confidence: 99%

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Invaders in waiting? Non-equilibrium in Southern Hemisphere seaweed distributions may lead to underestimation of Antarctic invasion potential

Laeseke¹,

Martínez²,

Mansilla³

et al. 2021

Frontiers of Biogeography

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Bioinvasions pose a major threat to global biodiversity. Correlative Ecological Niche Models (ENMs) can be a valuable tool to identify invaders and invasion sites. However, in cases when species are in non-equilibrium with their native environment (i.e. do not fill their niche), correlative approaches have limited power and invasions lead to shifts of the realized niche. In recent years, several new seaweed species have been reported in Antarctica. It is impossible to unequivocally identify which of these species are truly non-natives, however, here, we provide literature-based evidence that seaweed species have been introduced to Antarctica. Under this assumption, we reconstruct pre-and post-introduction niches of these species, calculate relative niche sizes and overlap between pre-Antarctic and Antarctic sites, and Highlights• Non-native Antarctic species likely originate from climatically non-matching and distant habitats • Shifts in realized niches might be common during introductions to Antarctica • Southern Hemisphere seaweeds in particular, and perhaps other intertidal organisms, in the Southern Hemisphere exhibit non-equilibrium distributions and might be "invaders in waiting" • Purely correlative approaches to identify potential Antarctic invaders are insufficient

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Section: Discussionsupporting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

Invaders in waiting? Non-equilibrium in Southern Hemisphere seaweed distributions may lead to underestimation of Antarctic invasion potential

Laeseke¹,

Martínez²,

Mansilla³

et al. 2021

Frontiers of Biogeography

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Diversity of Antarctic Seaweeds

et al. 2020

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Ship traffic connects Antarctica’s fragile coasts to worldwide ecosystems

McCarthy

Peck

Aldridge

2022

Proc. Natl. Acad. Sci. U.S.A.

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Antarctica, an isolated and long considered pristine wilderness, is becoming increasingly exposed to the negative effects of ship-borne human activity, and especially the introduction of invasive species. Here, we provide a comprehensive quantitative analysis of ship movements into Antarctic waters and a spatially explicit assessment of introduction risk for nonnative marine species in all Antarctic waters. We show that vessels traverse Antarctica’s isolating natural barriers, connecting it directly via an extensive network of ship activity to all global regions, especially South Atlantic and European ports. Ship visits are more than seven times higher to the Antarctic Peninsula (especially east of Anvers Island) and the South Shetland Islands than elsewhere around Antarctica, together accounting for 88% of visits to Southern Ocean ecoregions. Contrary to expectations, we show that while the five recognized “Antarctic Gateway cities” are important last ports of call, especially for research and tourism vessels, an additional 53 ports had vessels directly departing to Antarctica from 2014 to 2018. We identify ports outside Antarctica where biosecurity interventions could be most effectively implemented and the most vulnerable Antarctic locations where monitoring programs for high-risk invaders should be established.

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Marine Macroalgal Diversity in Admiralty Bay, King George Island, South Shetlands Islands, Antarctica

Cited by 4 publications

References 8 publications

Invaders in waiting? Non-equilibrium in Southern Hemisphere seaweed distributions may lead to underestimation of Antarctic invasion potential

Invaders in waiting? Non-equilibrium in Southern Hemisphere seaweed distributions may lead to underestimation of Antarctic invasion potential

Diversity of Antarctic Seaweeds

Ship traffic connects Antarctica’s fragile coasts to worldwide ecosystems

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