Recent origin of sub-Antarctic notothenioids

Stanković, Anna; Spalik, Krzysztof; Kamler, Ewa; Borsuk, Piotr; Węgleński, Piotr

doi:10.1007/s00300-001-0327-x

Cited by 45 publications

(34 citation statements)

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“…Over the last two million years the climate on Earth has undergone recurring fluctuations that resulted in the Ice Under a phylogenetic framework (González-Wevar et al 2010; in press), the origin and diversification of Nacella in different provinces of the Southern Ocean occurred during the mid-to late-Miocene, long after the physical separation of the continental landmasses estimated between 41 Ma (Livermore et al 2005) and 23.9 (Scher and Martin 2006) and to the initiation of the ACC. Such divergence within Nacella is basic agreement with recent molecular studies in notothenioid fishes (Near et al 2012;Stankovic et al 2002) and in different groups of marine invertebrates (Page and Linse 2002;Wilson, Schrödl, and Halanych 2009) showing recent processes of diversification in the Southern Ocean. In this context, levels of pairwise uncorrected p-distances recorded in Nacella are comparable to those detected between Antarctic and South American lineages of Astrotoma (Hunter and Halanych 2008), Odontaster (Janosik, Mahon, and Halanych 2011), Sterechinus (Poulin et al 2014) and Yoldia (González-Wevar et al 2012a;Poulin et al 2014).…”

Section: Discussionsupporting

confidence: 89%

Patterns of genetic diversity and structure in Antarctic and sub-AntarcticNacella(Patellogastropoda: Nacellidae) species

et al. 2016

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The biogeography of the Southern Ocean reflects complex interactions between major macro-evolutionary forces and biotic elements. Major gateway openings, the establishment of the Antarctic Circumpolar Current and climate cooling are deeply connected to the composition, abundance and distribution of the Southern Ocean marine benthic fauna. Glacial episodes of the Quaternary heavily impacted the distribution of the genetic variation of the Southern Ocean biota. The genus Nacella includes 12 nominal species in different provinces of the Southern Ocean. In this study, we compared patterns of mitochondrial DNA diversity in three Nacella species from Antarctic Peninsula, Kerguelen Island and Patagonia. Low levels of genetic diversity and absence of genetic structure characterise each one of them showing the strong impact of ice advances and retreats over their respective demographics. Haplotype diversity, short genealogies and demographic inference recorded suggest the occurrence of a more dramatic demographic process in Antarctic Peninsula than in the sub-Antarctic.

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Section: Discussionsupporting

confidence: 89%

Patterns of genetic diversity and structure in Antarctic and sub-AntarcticNacella(Patellogastropoda: Nacellidae) species

et al. 2016

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“…Combined D-loop and cyt b sequences (Bargelloni et al 2000b) as well as 16S and 12S combined sequences (Bargelloni et al 2000a) place the artedidraconids and P. charcoti in a topology different from that seen in our data, although the COI topology is quite similar to that of 16S when the complete gene sequence is analysed (Near et al 2004). The resolution of relationships among species of the genus Trematomus afforded by COI were also remarkably similar to phylogenetic studies of genetic differentiation in this taxa (Ritchie et al 1996, Bargelloni et al 2000a, 2000b, Stankovic et al 2002, Near et al 2004, Sanchez et al 2007. Similarly, COI data supported previously reported relationships (Near et al 2004) among the species of the genus Lepidonotothen as well as their sister genera Patagonotothen.…”

Section: Corroboration Of Phylogenetic Signalsupporting

confidence: 79%

DNA barcodes of fish of the Scotia Sea, Antarctica indicate priority groups for taxonomic and systematics focus

et al. 2008

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We analysed cytochrome oxidase I (COI) barcodes for 35 putative fish species collected in the Scotia Sea, and compared the resultant molecular data with field-based morphological identifications, and additional sequence data obtained from GenBank and the Barcode of Life Data System (BOLD). There was high congruence between morphological and molecular classification, and COI provided effective species-level discrimination for nearly all putative species. No effect of geographic sampling was observed for COI sequence variation. For two families, including the Liparidae and Zoarcidae, for which morphological field identification was unable to resolve taxonomy, DNA barcoding revealed significant species-level divergence. However, the dataset lacked sufficient sensitivity for resolving species within the Bathydraco and Artedidraco genera. Analysis of cytochrome b for these two genera also failed to resolve taxonomic identity. The data are discussed in relation to emergent priorities for additional taxonomic studies. We emphasize the utility of DNA barcoding in providing a valuable taxonomic framework for fundamental population studies through assigning life history stages or other morphologically ambiguous samples to parental species.

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“…areas south of the APF) faunas (Ekman 1953). The Magellan region in particular has been found to have strong biogeographical and evolutionary affinities with sub-Antarctic islands and the western Antarctic Peninsula shelf (Page & Linse 2002, Stankovic et al 2002, Figuerola et al 2014. Abyssal and bathyal faunas have also been identified as having similar patterns in adjacent deep ocean basins (Vinogradova 1997, Zezina 1997, O'Loughlin et al 2011.…”

Section: Introductionmentioning

confidence: 99%

Biogeographical patterns among deep sea megabenthic communities across the Drake Passage

Auscavitch

Waller

2017

Antarctic Science

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Biogeographical patterns among deep sea benthic communities in the Drake Passage remain poorly understood as a consequence of poor sampling resolution and the spatial remoteness of many sea floor features. Hard-bottom features, including at least 20 seamounts, remain uncharacterized with respect to their benthic megafaunal community assemblages. Here, we present community assemblage patterns from several locations across the Drake Passage to better understand the faunal relationships between deep sea floor communities in the region. Towed camera surveys were conducted on nine topographical features ranging from shelf environments on the southern Chilean Margin, the western Antarctic Peninsula shelf and seamounts in the central Drake Passage. These are the first quantitative measurements of megafaunal abundance at two seamount complexes in the central Drake Passage and multivariate analyses are used to examine the factors influencing species distributions. Three biogeographical groupings were identified based on species assemblages and environmental variables specific to major water mass boundaries in the region: sub-Antarctic Mode Water (318–523 m), Antarctic Intermediate Water (504–1128 m) and Circumpolar Deep Water (1837–3034 m). Further examination of megafaunal associations between sea floor structures may provide clues as to how sub-Antarctic communities are connected throughout the greater Southern Ocean.

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Recent origin of sub-Antarctic notothenioids

Cited by 45 publications

References 0 publications

Patterns of genetic diversity and structure in Antarctic and sub-AntarcticNacella(Patellogastropoda: Nacellidae) species

Patterns of genetic diversity and structure in Antarctic and sub-AntarcticNacella(Patellogastropoda: Nacellidae) species

DNA barcodes of fish of the Scotia Sea, Antarctica indicate priority groups for taxonomic and systematics focus

Biogeographical patterns among deep sea megabenthic communities across the Drake Passage

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