The use of hand-sanitiser gel facilitates combined morphological and genetic analysis of shelled pteropods DOI Creative Commons
Le Qin Choo, G. Spagliardi, Katja T. C. A. Peijnenburg

et al.

Marine Biodiversity, Journal Year: 2023, Volume and Issue: 53(6)

Published: Nov. 18, 2023

Abstract There is a lack of standardised imaging methods for marine zooplankton due to the difficulty manipulating small and often fragile specimens. Yet, 2D photographs 3D scans provide important morphological information accompany DNA-barcoded specimens reference databases such as Barcode Life Data System (BOLD). Shelled pteropods are considered bio-indicators study impacts ocean acidification, thus, it especially obtain high-quality records their aragonitic shells. We used alcohol-based hand sanitiser gel medium photographing genus Limacina prior micro-CT scanning destructive DNA analysis. The high viscosity transparency enabled easy handling so that they could be positioned in orientation photographed with stacking microscope. record morphology allow subsequent geometric morphometric analyses. This method did not impact downstream molecular analyses same resulted publicly available digital vouchers well ten barcodes (partial Cytochrome Oxidase I gene sequences). While entered our daily lives distressing pandemic, we make use cheap easily resource quality voucher shelled pteropods. Digital serve further taxonomic facilitate studies assessing shell growth acidification.

Language: Английский

Genome analysis reveals three distinct lineages of the cosmopolitan white shark DOI Creative Commons
Isabel Wagner, Irina Smolina,

Martina E.L. Koop

et al.

Current Biology, Journal Year: 2024, Volume and Issue: 34(15), P. 3582 - 3590.e4

Published: July 23, 2024

Language: Английский

Citations

7
Revision of the ‘Acanthephyra purpurea’ species complex (Crustacea: Decapoda), with an emphasis on species diversification in the Atlantic DOI
Dmitry N. Kulagin, Anastasia A. Lunina, U. V. Simakova

et al.

Molecular Phylogenetics and Evolution, Journal Year: 2024, Volume and Issue: 195, P. 108070 - 108070

Published: April 2, 2024

Language: Английский

Citations

4
Global Variation in Zooplankton Niche Divergence Across Ocean Basins DOI Creative Commons
Niall McGinty, Andrew J. Irwin

Ecology Letters, Journal Year: 2025, Volume and Issue: 28(2)

Published: Feb. 1, 2025

ABSTRACT Modelling responses to climate change assumes zooplankton populations remain similar over time with little adaptation (niche conservatism). Oceanic barriers, genetic, phenotypic variation and species interactions in cosmopolitan could drive niche divergence within species. We assess among 223 globally distributed across the seven main ocean basins. There were 357 diverged niches out of 828 basin comparisons. The proportion varied both phyla. Copepoda (156 species) used test for between same‐species different environmental gradients. Global was found be more likely colder temperatures nearshore environments. Opposing temperature four comparisons, which may relate connectivity patterns them. This study demonstrates adaptive potential environmental‐niche gradients, must considered when modelling population change.

Language: Английский

Citations

0
Global Genomics of Man-O'-War (Physalia) Reveals Ocean Surface Biodiversity DOI
Samuel H. Church,

River B. Abedon,

Namrata Ahuja

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Comparative Population Transcriptomics Provide New Insight into the Evolutionary History and Adaptive Potential of World Ocean Krill DOI Creative Commons
Marvin Choquet, Felix Lenner,

Arianna Cocco

et al.

Molecular Biology and Evolution, Journal Year: 2023, Volume and Issue: 40(11)

Published: Oct. 10, 2023

Genetic variation is instrumental for adaptation to changing environments but it unclear how structured and contributes in pelagic species lacking clear barriers gene flow. Here, we applied comparative genomics extensive transcriptome datasets from 20 krill collected across the Atlantic, Indian, Pacific, Southern Oceans. We compared genetic both within between elucidate their evolutionary history genomic bases of adaptation. resolved phylogenetic interrelationships uncovered evidence elevate cryptic Euphausia similis var. armata into species. Levels rates adaptive protein evolution vary widely. Species endemic cold Ocean, such as Antarctic superba, showed less lower than other This could suggest a low potential rapid climate change. hundreds candidate genes with signatures among did not observe strong convergence predominantly Arctic Thysanoessa. instead identified candidates cold-adaptation that have also been detected fish, including govern thermal reception TrpA1. Our results parallel responses similar selection pressures taxa provide new insights important zooplankton already affected by

Language: Английский

Citations

3
Unmasking microsatellite deceptiveness and debunking hybridization with SNPs in four marine copepod species of Calanus DOI Creative Commons
Marvin Choquet, Apollo Marco D. Lizano, Alan Le Moan

et al.

Molecular Ecology, Journal Year: 2023, Volume and Issue: 32(24), P. 6854 - 6873

Published: Oct. 30, 2023

Interspecific hybridization events are on the rise in natural systems due to climate change disrupting species barriers. Across taxa, microsatellites have long been molecular markers of choice identify admixed individuals. However, with advent high-throughput sequencing easing generation genome-wide datasets, incorrect reports resulting from microsatellite technical artefacts uncovered a growing number taxa. In marine zooplankton genus Calanus (Copepoda), whose used as indicators, suggested between C. finmarchicus and glacialis, while other nuclear (InDels) never detected any individuals, leaving scientific community divided. Here, for first time, we investigated potential among finmarchicus, helgolandicus hyperboreus using two large independent SNP datasets. These were derived firstly protocol target-capture applied 179 individuals collected 17 sites across North Atlantic Arctic Oceans, including sympatric areas, second published RNA sequences. All SNP-based analyses congruent showing that distinct do not appear hybridize. We then thoroughly re-assessed hybrids, support transcriptomes, identified issues plaguing eight out 10 microsatellites, size homoplasy, paralogy, null alleles even primer pairs targeting same locus. Our study illustrates how deceptive can be when investigation hybridization.

Language: Английский

Citations

3
Global variation in zooplankton niche divergence: Evidence of environmental and trait signals for calanoid copepods DOI Open Access
Niall McGinty, Andrew J. Irwin

Authorea (Authorea), Journal Year: 2024, Volume and Issue: unknown

Published: April 13, 2024

Ocean warming has led to significant changes for marine zooplankton. Modelling responses climate change assume that zooplankton respond uniformly with little adaptation (niche conservatism). Oceanic barriers, local and genetic variation in cosmopolitan species could drive niche divergence between same populations. We assess among 325 globally distributed across the five main ocean basins. There were 487 diverged niches out of 1124 basin comparisons. The proportion varied both within phyla. Calanoida (133 species) used test likelihood population environmental gradients. Niche was more likely occur occupy colder waters shallower depths. larger ominivore-herbivores than smaller sized carnivores. This study demonstrates adaptive potential environmental-niche gradients, which must be considered when modelling change.

Language: Английский

Citations

0
Rapid speciation in the holopelagic ctenophoreMnemiopsisfollowing glacial recession DOI Creative Commons
Remi N. Ketchum, Edward G. Smith,

Leandra M. Toledo

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 13, 2024

Abstract Understanding how populations diverge is one of the oldest and most compelling questions in evolutionary biology. An depth understanding this process operates planktonic marine animals, where barriers for gene flow are seemingly absent, critical to past, present, future ocean life. Mnemiopsis plays an important ecological role its native habitat along Atlantic coast Americas highly destructive non-native habitats European waters. Although historical literature described three species , lack stable morphological characters has led collapse group into a single species, leidyi . We generate high-quality reference genomes use whole-genome sequencing approach reveal that there two range show divergence between coincides with glacial melting. define hybridization zone highlight environmental sensing genes likely contribute invasive success Overall, study provides insights fundamental question holopelagic arise without clear sheds light on genomic mechanisms invasion species.

Language: Английский

Citations

0
Genetic Determination of a Cryptic Species in the Littoraria Genus With Whole‐Genome Molecular Resolution DOI Creative Commons

Jia‐Wei Xu,

Jie Wang, Yun‐Wei Dong

et al.

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(12)

Published: Dec. 1, 2024

Recognizing cryptic species is crucial for understanding global biodiversity. The intertidal snail

Language: Английский

Citations

0
Shedding light on some dark branches: The under‐appreciated diversity of gymnosome pteropods and their coiled thecosome prey in the Neotropics DOI Open Access
Maycol Madrid, Alexandra De León,

Dubravka Vrdoljak

et al.

Invertebrate Biology, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 22, 2024

Abstract Holoplanktonic organisms are thought to have enormous populations sizes, expansive geographic ranges, and low species diversity. Previous work suggests that pelagic gastropods no exception this generalization. However, most of these data derived from temperate species, whereas the bulk pteropod diversity occurs in tropics. Here, we present DNA barcode for COI focused on under‐studied limacinoid, gymnosome, pseudothecosome pteropods collected coastal waters Panama. We applied four molecular delimitation approaches determine number operational taxonomic units (OTUs) identifiable our sequences all available Barcode Life Database (BOLD) GenBank compared Index Number generated by BOLD. Assemble Species Automatic Partitioning (ASAP), Poisson Tree Processes (PTP), Bayesian (bPTP), Generalized Mixed Yule Coalescent (GMYC) methods generally gave congruent results suggest tropics is significantly underrepresented both sequence databases named OTUs. Of 42 specimens sequenced, recovered 16 OTUs, only one which belonged an OTU already represented databases. Neighbor‐joining trees including previously published show three groups morphospecies can include genetically divergent lineages. Many very (>15% nearest neighbor) taxa also still a single sequence, suggesting there large amount cryptic or pseudo‐cryptic be described. To aid future endeavor, some preliminary 16S new pteropod‐specific primers.

Language: Английский

Citations

0