The meroplankton community of the oceanic Ross Sea during late summer

Gallego, Ramón; Lavery, Shane; Sewell, Mary A.

doi:10.1017/s0954102013000795

Cited by 19 publications

(20 citation statements)

References 35 publications

(104 reference statements)

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“…A. simplex was sequenced from all three Antarctic locations sampled. The distribution of L. weddellia was also extended to the Ross Sea by identical sequences to that of a larval specimen from the Ross Sea (Gallego et al, 2014). No specimens of H. fuligineum were identified from the Weddell Sea, but specimens were found within the Amundsen and Scotia Arc regions.…”

Section: Observations Of Widespread Species Within West Antarcticmentioning

confidence: 84%

“…Matching haplotypes between individuals of the same species from at least two of the sampled regions as well as matches with larval DNA from the Ross Sea (Heimeier et al, 2010;Gallego et al, 2014) suggests an abundance of widespread polychaete species. Our results suggest that the three morphospeices, Laonice weddellia, Harmothoe fuligineum, and Aricidea simplex, are widespread within the West Antarctic, with potentially circumAntarctic distributions.…”

Section: Widespread Antarctic Speciesmentioning

confidence: 92%

“…The presumed distributions in Table 1 were defined using taxonomic databases including the Encyclopedia of Life (EOL) and RAMS. For undetermined morphospecies, their distribution was deciphered by their presence within samples collected in the each of the regions as well as any BLAST matches with georeferenced sequence including larval matches within the Ross Sea (Heimeier et al, 2010;Gallego et al, 2014).…”

Section: Specimen Selection and Presumed Distributionmentioning

confidence: 99%

“…We know from genetic studies that three of our species, Hesionidae sp. (MB1), Aglaophamus trissophyllus and Laonice weddellia have pelagic larvae in Antarctic waters (Heimeier et al, 2010;Gallego et al, 2014).…”

Section: Particle Tracking Model To Estimate Larval Dispersalmentioning

confidence: 99%

“…Frontiers in Marine Science | www.frontiersin.org (Heimeier et al, 2010;Gallego et al, 2014). Strelzov (1979) 1 ;Fauchald (1983) 2 ; Bhaud (1988) 3 ; Blake and Arnofsky (1999) 4 ; Van Dover et al (1999); Beesley et al (2000) 5 ; Rouse and Pleijel (2001) 6 ; Pernet et al (2002) 7 ; Carson and Hentschel (2006) 8 and Rouse and Pleijel (2006) for seasonal reproductive cycles in benthic fauna, different larval stages have been observed within the water column through the year (Bowden et al, 2009;Sewell and Jury, 2011).…”

Section: The Presumed Distribution Of Each Morphospecies Was Obtainedmentioning

confidence: 99%

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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: Observations Of Widespread Species Within West Antarcticmentioning

confidence: 84%

Section: Widespread Antarctic Speciesmentioning

confidence: 92%

Section: Specimen Selection and Presumed Distributionmentioning

confidence: 99%

Section: Particle Tracking Model To Estimate Larval Dispersalmentioning

confidence: 99%

Section: The Presumed Distribution Of Each Morphospecies Was Obtainedmentioning

confidence: 99%

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

et al. 2017

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Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide‐scale barcoding approach

Cowart

Schiaparelli

Alvaro

et al. 2022

Ecology and Evolution

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The Antarctic marine environment hosts diversified and highly endemic benthos owing to its unique geologic and climatic history. Current warming trends have increased the urgency of understanding Antarctic species history to predict how environmental changes will impact ecosystem functioning. Antarctic benthic lineages have traditionally been examined under three hypotheses: (1) high endemism and local radiation, (2) emergence of deep‐sea taxa through thermohaline circulation, and (3) species migrations across the Polar Front. In this study, we investigated which hypotheses best describe benthic invertebrate origins by examining Antarctic scale worms (Polynoidae). We amassed 691 polynoid sequences from the Southern Ocean and neighboring areas: the Kerguelen and Tierra del Fuego (South America) archipelagos, the Indian Ocean, and waters around New Zealand. We performed phylogenetic reconstructions to identify lineages across geographic regions, aided by mitochondrial markers cytochrome c oxidase subunit I (Cox1) and 16S ribosomal RNA (16S). Additionally, we produced haplotype networks at the species scale to examine genetic diversity, biogeographic separations, and past demography. The Cox1 dataset provided the most illuminating insights into the evolution of polynoids, with a total of 36 lineages identified. Eunoe sp. was present at Tierra del Fuego and Kerguelen, in favor of the latter acting as a migration crossroads. Harmothoe fuligineum , widespread around the Antarctic continent, was also present but isolated at Kerguelen, possibly resulting from historical freeze–thaw cycles. The genus Polyeunoa appears to have diversified prior to colonizing the continent, leading to the co‐occurrence of at least three cryptic species around the Southern and Indian Oceans. Analyses identified that nearly all populations are presently expanding following a bottleneck event, possibly caused by habitat reduction from the last glacial episodes. Findings support multiple origins for contemporary Antarctic polynoids, and some species investigated here provide information on ancestral scenarios of (re)colonization. First, it is apparent that species collected from the Antarctic continent are endemic, as the absence of closely related species in the Kerguelen and Tierra del Fuego datasets for most lineages argues in favor of Hypothesis 1 of local origin. Next, Eunoe sp. and H. fuligineum , however, support the possibility of Kerguelen and other sub‐Antarctic islands acting as a crossroads for larvae of some species, in support of Hypothesis 3. Finally, the genus Polyeunoa , conversely, is found at depths greater than 150 m and may have a deep origin, in line with Hypothesis 2. These “non endemic” groups, nevertheless, have a distribution that is either north or south of the Antarctic Polar Front, indicating that there is still a barrier to dispersal, even in the deep se...

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Developmental trade-offs in Southern Ocean mollusc kleptoparasitic species

et al. 2015

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Connectivity is a key factor in determining the genetic structure of marine populations, and type and duration of the larval phase strongly affect dispersal abilities of species. In Antarctica, invertebrates show a higher proportion of species with limited pelagic dispersal, and any exception to this pattern is worthy of attention. Capulidae is a family of kleptoparasitic\ud gastropods, with two larval strategies. Most species have a peculiar planktotrophic larva, the ‘echinospira’, which enables a long pelagic dispersal; a minority of species undergo lecithotrophic development. We provide the first molecular phylogenetic framework for the family and define the Antarctic species based on molecular data. Based on this information, and on larval shell morphology, we tested the hypothesis that capulid species with high dispersal capacities via planktotrophic larvae display high genetic connectivity over long distances. Our data showed that whilst larval planktotrophy is the predominant larval strategy of the family worldwide, the vast majority of Antarctic species exhibit nonplanktotrophic development. The unique exception, Capulus subcompressus, showed high genetic connectivity\ud between the Ross Sea and Weddell Sea-Antarctic Peninsula. In all other Antarctic species, environmental constraints selected towards intracapsular metamorphosis, despite the associated limits of dispersal and finding a host

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The meroplankton community of the oceanic Ross Sea during late summer

Cited by 19 publications

References 35 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

Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide‐scale barcoding approach

Developmental trade-offs in Southern Ocean mollusc kleptoparasitic species

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