Distribution patterns in Antarctic and Subantarctic echinoderms

Moles, Juan; Figuerola, Blanca; Campanyà-Llovet, Neus; Monleón-Getino, Toni; Taboada, Sergi; Ávila, Conxita

doi:10.1007/s00300-014-1640-5

Cited by 23 publications

(46 citation statements)

References 65 publications

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“…We found low values of endemism for each bioregion when considered in isolation in contrast to the high levels of endemism for the SO (59%) and Antarctic region (29%). These levels are similar to those previously reported for the SO (Moles et al ., ) and high compared to other regions, possibly due to the ancient isolation of the SO by the ACC front system associated to speciation and radiation events within Antarctic waters (Watling & Thurston, ; Lecointre et al ., ; De Broyer & Jażdżewska, ).…”

Section: Discussionmentioning

confidence: 99%

“…Sladen, ) with hundreds of species recorded (latest checklist in Moreau et al ., ) and frequent checklists (e.g. Moles et al ., ). Moreover, there is a particularly high proportion of brooding sea stars in the SO (Poulin et al ., ; Pearse et al ., ).…”

Section: Introductionmentioning

confidence: 97%

“…Moreover, there is a particularly high proportion of brooding sea stars in the SO (Poulin et al ., ; Pearse et al ., ). Despite the potential importance of asteroids as ecosystem structuring agents (Mah & Blake, ; Lawrence, ), very few studies have assessed the overall distribution pattern of SO asteroid diversity (Danis et al ., ; Moles et al ., ) and the relative importance of each driving factor involved in the observed patterns has not yet been addressed.…”

Section: Introductionmentioning

confidence: 99%

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Reproductive strategy as a piece of the biogeographic puzzle: a case study using Antarctic sea stars (Echinodermata, Asteroidea)

Moreau

Saucède

Jossart

et al. 2017

Journal of Biogeography

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Aim To describe and analyse asteroid biogeographic patterns in the Southern Ocean (SO) and test whether reproductive strategy (brooder versus broadcaster) can explain distribution patterns at the scale of the entire class. We hypothesize that brooding and broadcasting species display different biogeographic patterns.Location Southern Ocean, south of 45°S.Methods Over 14,000 asteroid occurrences are analysed using bootstrapped spanning network (BSN), non-metrical multidimensional scaling (nMDS) and clustering to uncover the spatial structure of faunal similarities among 25 bioregions.Results Main biogeographic patterns are congruent with previous works based on other taxa and highlight the isolation of New Zealand, the high richness in the Scotia Arc area particularly of brooding species, an East/West Antarctic differentiation, and the faunal affinities between South America and sub-Antarctic Islands. Asteroids show lower endemism levels than previously reported with 29% of species occurring in Antarctica only. In particular, asteroids from Tierra del Fuego showed affinities with those of West Antarctica at the species level, suggesting a recent mixing of assemblages. Biogeographic patterns are highly linked to reproductive strategy. Patterns also differ according to the taxonomic level, revealing the underlying role of historical factors.Main conclusions Patterns of sea star biogeography are consistent with results obtained for other marine groups and are strongly linked to reproductive strategy.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Reproductive strategy as a piece of the biogeographic puzzle: a case study using Antarctic sea stars (Echinodermata, Asteroidea)

Moreau

Saucède

Jossart

et al. 2017

Journal of Biogeography

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“…Furthermore, sampling efforts vary between target invertebrates (Fig. 1) independently of their abundance and distribution patterns (e.g., De Broyer et al, 2014;Figuerola et al, 2014;Moles et al, 2015). In the following section, we provide an update on the state of genetic diversity accounts and speciation patterns in Antarctica for the five marine invertebrate phyla that have been studied to date (see Table 1 for details).…”

Section: What Do We Know About the Genetic Diversity And Connectivitymentioning

confidence: 98%

Evolutionary patterns in Antarctic marine invertebrates: An update on molecular studies

2015

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“…To date, around 300 species have been recorded from the SO (Moreau, Agüera, Jossart, & Danis, ; Moreau et al, ) but it is likely that many more remain to be described. Recent studies based on species morphological identification tried to disentangle distribution patterns and biogeographic relationships in sea stars at the scale of the entire SO (Moles et al, ; Moreau et al, ). These studies described the spatial structure of asteroid assemblages and stressed the major influence of life history traits, among which reproductive strategy appeared to have the most notable effect (Moreau et al, ).…”

Section: Introductionmentioning

confidence: 99%

Is reproductive strategy a key factor in understanding the evolutionary history of Southern Ocean Asteroidea (Echinodermata)?

Moreau

Danis

Jossart

et al. 2019

Ecology and Evolution

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Life traits such as reproductive strategy can be determining factors of species evolutionary history and explain the resulting diversity patterns. This can be investigated using phylogeographic analyses of genetic units. In this work, the genetic structure of five asteroid genera with contrasting reproductive strategies (brooding: Diplasterias , Notasterias and Lysasterias versus broadcasting: Psilaster and Bathybiaster ) was investigated in the Southern Ocean. Over 1,400 mtDNA cytochrome C oxidase subunit I (COI) sequences were analysed using five species delineation methods (ABGD, ASAP, mPTP, sGMYC and mGMYC), two phylogenetic reconstructions (ML and BA), and molecular clock calibrations, in order to examine the weight of reproductive strategy in the observed differences among phylogeographic patterns. We hypothesised that brooding species would show higher levels of genetic diversity and species richness along with a clearer geographic structuring than broadcasting species. In contrast, genetic diversity and species richness were not found to be significantly different between brooders and broadcasters, but broadcasters are less spatially structured than brooders supporting our initial hypothesis and suggesting more complex evolutionary histories associated to this reproductive strategy. Broadcasters' phylogeography can be explained by different scenarios including deep‐sea colonisation routes, bipolarity or cosmopolitanism, and sub‐Antarctic emergence for the genus Bathybiaster ; Antarctic‐ New Zealand faunal exchanges across the Polar Front for the genus Psilaster . Brooders' phylogeography could support the previously formulated hypothesis of a past trans‐Antarctic seaway established between the Ross and the Weddell seas during the Plio‐Pleistocene. Our results also show, for the first time, that the Weddell Sea is populated by a mixed asteroid fauna originating from both the East and West Antarctic.

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Distribution patterns in Antarctic and Subantarctic echinoderms

Cited by 23 publications

References 65 publications

Reproductive strategy as a piece of the biogeographic puzzle: a case study using Antarctic sea stars (Echinodermata, Asteroidea)

Reproductive strategy as a piece of the biogeographic puzzle: a case study using Antarctic sea stars (Echinodermata, Asteroidea)

Evolutionary patterns in Antarctic marine invertebrates: An update on molecular studies

Is reproductive strategy a key factor in understanding the evolutionary history of Southern Ocean Asteroidea (Echinodermata)?

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