Circumantarctic distribution in Southern Ocean benthos? A genetic test using the genus Macroscapha (Crustacea, Ostracoda) as a model

Brandão, Simone N.; Sauer, Jan; Schön, Isa

doi:10.1016/j.ympev.2010.01.014

Cited by 65 publications

(46 citation statements)

References 63 publications

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“…The presence of widespread morphological and cryptic species is likely to be explained by their larval dispersal between populations as demonstrated by particle tracking models. The lack of consistency between the biogeography of cryptic species, some being widespread and potentially circum-Antarctic, whilst others are restricted, recorded within this study demonstrates the complexity of Southern Ocean biogeography (Brandão et al, 2010;Strugnell and Allcock, 2013;Chown et al, 2015). Fine scale differences in species distributions may be a result of variable life histories, habitat preferences, biological responses and ecological interactions within and between species through past and present physical conditions rather than a lack of transport connectivity from oceanographic currents.…”

Section: Conclusion and Wider Implicationsmentioning

confidence: 69%

Distributional Patterns of Polychaetes Across the West Antarctic Based on DNA Barcoding and Particle Tracking Analyses

et al. 2017

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Recent genetic investigations have uncovered a high proportion of cryptic species within Antarctic polychaetes. It is likely that these evolved in isolation during periods of glaciation, and it is possible that cryptic populations would have remained geographically restricted from one another occupying different regions of Antarctica. By analysing the distributions of nine morphospecies, (six of which contained potential cryptic species), we find evidence for widespread distributions within the West Antarctic. Around 60% of the cryptic species exhibited sympatric distributions, and at least one cryptic clade was found to be widespread. Additional DNA barcodes from GenBank and morphological records extended the observed range of three species studied here, and indicate potential circum-Antarctic traits. Particle tracking analyses were used to model theoretical dispersal ranges of pelagic larvae. Data from these models suggest that the observed species distributions inferred from genetic similarity could have been established and maintained through the regional oceanographic currents, including the Antarctic Circumpolar Current (ACC) and its coastal counter current. Improved understanding of the distribution of Antarctic fauna is essential for predicting the impacts of environmental change and determining management strategies for the region.

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Section: Conclusion and Wider Implicationsmentioning

confidence: 69%

Distributional Patterns of Polychaetes Across the West Antarctic Based on DNA Barcoding and Particle Tracking Analyses

et al. 2017

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“…Also, a study on Eastern Weddell Sea populations of the deep-water isopod Betamorpha fusiformis resulted into seven different lineages, which may be hiding cryptic species too (Raupach et al, 2007). Other examples include the ostracod Macroscapha tensa and the cumacean Leucon antarcticus, which appeared to show divergent lineages, congruent with the occurrence of cryptic species (Rehm, 2009;Brandão et al, 2010).…”

Section: Arthropodsmentioning

confidence: 99%

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

2015

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“…The figures show the average genetic p distances (yaxis) with the standard deviations. a At the interspecific level for LB and LT. b At the intraspecific level for LB and LT studies on ostracods when both markers were used for phylogenetic (Schön et al, 1998(Schön et al, , 2000b(Schön et al, , 2003Nunes Brandao et al, 2010) and phylogeographic (Schön, 2007) studies.…”

Section: Differences In Genetic Distances and Substitution Ratesmentioning

confidence: 99%

Molecular analyses of ostracod flocks from Lake Baikal and Lake Tanganyika

Schön

Martens

2011

Hydrobiologia

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Ancient lakes are excellent laboratories for evolutionary research, where species can be studied in the cradle where they originated. In this article, we investigate two endemic ostracod species flocks from the two oldest lakes in the world, Lake Baikal (LB) (ca. 28 myr) and Lake Tanganyika (LT) (ca. 12 myr), with DNA sequence data. Nuclear ITS1 failed to resolve the phylogeny of both flocks. Whilst most phylogenetic relationships of the Tanganyika flock are resolved with mitochondrial COI, the Baikalian tree contains multifurications of up to seven different clades. The Tanganyikan Cyprideis flock shows higher genetic variability, which matches its higher morphological variability. A significant deviation from a constant divergence rate through time indicates that the Cytherissa flock most likely experienced explosive speciation events during its earlier history. Comparative analyses of substitution rates furthermore revealed that they are not clock-wise for COI. Ancestral Cytherissa probably radiated in LB 5-8 myr ago, around the time when the cold, oxygenated abyss was formed in LB. The Tanganyikan Cyprideis flock is almost twice as old as the Baikalian Cytherissa flock, and possibly older than LT itself, ca. 15 myr. The Cyprideis flock has survived drastic lake level changes and resulting salinity crises during its entire history.

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Circumantarctic distribution in Southern Ocean benthos? A genetic test using the genus Macroscapha (Crustacea, Ostracoda) as a model

Cited by 65 publications

References 63 publications

Distributional Patterns of Polychaetes Across the West Antarctic Based on DNA Barcoding and Particle Tracking Analyses

Distributional Patterns of Polychaetes Across the West Antarctic Based on DNA Barcoding and Particle Tracking Analyses

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

Molecular analyses of ostracod flocks from Lake Baikal and Lake Tanganyika

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