Does rafting promote contemporary gene flow? Global and regional patterns of population genetic diversity and structure on the false limpet Siphonaria lateralis in the Southern Ocean DOI Creative Commons

Constanza Millán-Medina,

Marcelo Lizama, Thomas Saucède

et al.

Frontiers in Ecology and Evolution, Journal Year: 2024, Volume and Issue: 12

Published: Sept. 9, 2024

Rafting has been proposed as an effective mechanism for species without free-living pelagic larvae to achieve long-distance dispersal, theoretically preventing population differentiation over wide distributional ranges. Moreover, rafting advocated a main dispersal marine invertebrates with sub-Antarctic distributions, because of abundant buoyant kelps, driven by the Antarctic Circumpolar Current. Nonetheless, little attention given role establish regular gene flow across sub-Antarctic, and geographic temporal scales at which it occurs. Aiming unravel these major questions about extent genetic connectivity Southern Ocean (SO), we studied pulmonate limpet Siphonaria lateralis , benthic encapsulated larvae, found on rocky intertidal islands southern South America. Since S. is closely associated D. antarctica plausible, revealed absence phylogeographic structure sub-Antarctic. We sampled 116 individuals from eight localities SO, used 5,515 SNPs obtained through Genotyping-by-Sequencing, determine contemporary diversity, structure, two spatial scales; global, regional, within Kerguelen. Results identified substantial differentiating Patagonia, Falklands/Malvinas Islands, Georgia Kerguelen archipelago, low levels flow. The most notable was between Patagonia/Falklands Georgia/Kerguelen. Structure also significant Patagonia Falkland/Malvinas Islands. Conversely, exhibited closer affinity, indications recent but limited historical estimates four populations were low. At regional scale, noteworthy persisted, insufficient prevent Consequently, rafting’s potential may be overestimated promoting events sporadic, irregular, unpredictable lacking larval stage, since don’t seem facilitate high both scales. Accordingly, other oceanographic factors or processes hinder establishment macroalgae, consequence, in

Language: Английский

Genotyping‐by‐sequencing for biogeography DOI Creative Commons
Felix Vaux, Ludovic Dutoit, Ceridwen I. Fraser

et al.

Journal of Biogeography, Journal Year: 2022, Volume and Issue: 50(2), P. 262 - 281

Published: Nov. 7, 2022

Abstract Aim Genotyping‐by‐sequencing (GBS) and similar reduced‐representation sequencing methods, such as restriction site‐associated DNA (RADseq), have been revolutionary for genetic analyses in biogeography. However, navigating the many different methodological analytical approaches numerous sources of potential error can be overwhelming. We provide an overview key considerations biogeographical research using GBS, from sample design through data filtering to sharing data, which should particularly assist new users. Taxon All taxa. Location Worldwide. Methods review recent advances GBS compare differences among methods approaches. highlight concerns most relevant research, emphasise practical limitations studies on non‐model organisms. Results vary substantially literature demonstrates need careful study organism hypothesis under investigation. Biogeographical organisms or long‐term sampling are likely face some compared ideal designs. The information recorded published manuscripts often varies. outline a general framework planning undertaking GBS. Main conclusions grown rapidly popularity research. Evaluating, recording justifying decisions throughout workflow—across sampling, library preparation sequencing, identifying samples loci, analyses, data—is crucial improving scientific reproducibility compatibility datasets. This outlines ways improve simplify thereby enhancing our capacity use genomic address broad‐scale questions.

Language: Английский

Citations

16
Forecasting the future of life in Antarctica DOI
Gabrielle Koerich, Ceridwen I. Fraser, Charles K. Lee

et al.

Trends in Ecology & Evolution, Journal Year: 2022, Volume and Issue: 38(1), P. 24 - 34

Published: Aug. 5, 2022

Language: Английский

Citations

15
Integrating kelp genomic analyses and geological data to reveal ancient earthquake impacts DOI Creative Commons
Felix Vaux, Ceridwen I. Fraser, Dave Craw

et al.

Journal of The Royal Society Interface, Journal Year: 2023, Volume and Issue: 20(202)

Published: May 1, 2023

Detached buoyant kelp can disperse thousands of kilometres at sea and colonize newly available shores in the wake disturbances that wipe out competitors. Localized earthquake uplift cause extirpation intertidal populations followed by recolonization. Sources recolonizing be detectable genomic structure contemporary populations. Our field observations combined with LiDAR mapping identified a previously unrecognized zone uplifted rocky coastline region is slowly subsiding. Intertidal ( Durvillaea antarctica ) on section coast genetically distinctive from nearby populations, signatures most similar to 300 km south. Genetic divergence between these locations suggests reproductive isolation for years. Combined geological genetic data suggest this event occurred during one four major earthquakes 6000 2000 years ago, younger events likely. Extirpation pre-existing required sudden approximately 2 metres, precluding several small incremental events. results show power integrating biological (genomic) analyses understand ancient processes their ecological impacts.

Language: Английский

Citations

7
Range wide genetic differentiation in the bull kelp Nereocystis luetkeana with a seascape genetic focus on the Salish Sea DOI Creative Commons

Lily Gierke,

Nelson Castilho Coelho, Tarang Khangaonkar

et al.

Frontiers in Marine Science, Journal Year: 2023, Volume and Issue: 10

Published: Nov. 14, 2023

Introduction In temperate regions, one of the most critical determinants present range-wide genetic diversity was Pleistocene climate oscillations, recent created by last glacial maximum (LGM). This study aimed to describe N. luetkeana structure across its entire range (Alaska California) and test different models population connectivity within Salish Sea. region colonized after LGM has been under increased disturbance in decades. Methods We utilized microsatellite markers at 53 sites range. Using higher sampling density Sea, we employed a seascape genetics approach tested isolation hydrodynamic transport environment models. Results At species distribution scale, found four main groups co-ancestry, Alaska; Washington with Vancouver Island’s outer coast Juan de Fuca Strait; Washington’s inner Sea; Oregon California. The highest allelic richness (AR) levels were California, near trailing edge, although AR also high Alaska. Sea had poorest distribution. Nevertheless, pattern supported this region. Discussion allelic, private allele differentiation suggest that during LGM, bull kelp both northern southern refugia Prince Wales Island-Haida Gwaii Central respectively. Genetic Northern California seems resilient disturbances, whereas low are concerning.

Language: Английский

Citations

7
Infrequent Long-Range Dispersal and Evolution of a Top Terrestrial Arthropod Predator in the Sub-Antarctic DOI
Jonas O. Wolff, Susan Kennedy, Melissa Houghton

et al.

The American Naturalist, Journal Year: 2024, Volume and Issue: 204(2), P. 191 - 199

Published: April 12, 2024

AbstractThe sub-Antarctic terrestrial ecosystems survive on isolated oceanic islands in the path of circumpolar currents and winds that have raged for more than 30 million years are shaped by climatic cycles surpass tolerance limits many species. Surprisingly little is known about how these assembled their native fauna such processes changed over time. Here, we demonstrate patterns timing colonization speciation largest dominant arthropod predators eastern sub-Antarctic: spiders genus

Language: Английский

Citations

2
Kelp holdfast microclimates buffer invertebrate inhabitants from extreme temperatures DOI Creative Commons
Frances Perry, Grant A. Duffy, Miles D. Lamare

et al.

Marine Environmental Research, Journal Year: 2024, Volume and Issue: 198, P. 106523 - 106523

Published: April 18, 2024

Climate change is altering environmental conditions, with microclimates providing small-scale refuges within otherwise challenging environments. Durvillaea (southern bull kelp; rimurapa) a genus of large intertidal fucoid algae, and some species harbour diverse invertebrate communities in their holdfasts. We hypothesised that animal-excavated holdfasts provide thermal refuge for epibiont species, tested this hypothesis using the exemplar D. poha. Using southern Aotearoa New Zealand population as case-study, we found extreme temperatures outside holdfast were 4.4 °C higher summer 6.9 lower winter than inside holdfast. A microclimate model was built used to forecast under 2100 conditions. Temperatures are predicted increase by 2-3 °C, which may exceed tolerances However, if poha or similar congeneric persists, will remain less external environment. The two Durvillaea-associated invertebrates, trochid gastropod Cantharidus antipodum amphipod Parawaldeckia kidderi, also assessed; C. antipodum, but not P. displayed metabolic depression at above below those holdfasts, suggesting they would be vulnerable future warming. Microclimates, such therefore important survival both northern (retreating edge) (expanding limits distributions.

Language: Английский

Citations

2
Floating debris and organisms can raft to Antarctic coasts from all major Southern Hemisphere landmasses DOI Creative Commons
Hannah Dawson, Matthew H. England, Adele K. Morrison

et al.

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(8)

Published: Aug. 1, 2024

Abstract Antarctica's unique marine ecosystems are threatened by the arrival of non‐native species on rafting ocean objects. The harsh environmental conditions in Antarctica prevent establishment many such species, but warming around continent and opening up ice‐free regions may already be reducing these barriers. Although recent genomic work has revealed that rafts—potentially carrying diverse coastal passengers—reach from sub‐Antarctic islands, vulnerability to incursions Southern Hemisphere continents remains unknown. Here we use 0.1° global model simulations explore whether drift connections exist between more northern, temperate landmasses Antarctic coastline. We show passively floating objects can not only also continental locations north Subtropical Front including Australia, South Africa, America Zealandia. find Peninsula is region at highest risk for introductions arriving natural oceanic dispersal, highlighting this region, which via ship traffic rapid warming. widespread with landmasses, combined an increasing abundance anthropogenic vectors, poses a growing ecosystems, especially as projected become suitable future.

Language: Английский

Citations

2
Resource flow network structure drives meta-ecosystem function DOI
Tianna Peller, Isabelle Gounand,

Florian Altermatt

et al.

The American Naturalist, Journal Year: 2024, Volume and Issue: 204(6), P. 546 - 560

Published: Aug. 22, 2024

Previous articleNext article No AccessResource flow network structure drives meta-ecosystem functionTianna Peller, Isabelle Gounand, and Florian AltermattTianna AltermattPDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookxLinkedInRedditEmailPrint SectionsMoreDetailsFiguresReferencesCited by The American Naturalist Just Accepted Published for Society of Naturalists Article DOIhttps://doi.org/10.1086/732812 PermissionsRequest permissions © 2024 University Chicago. All Rights reserved.PDF download Crossref reports no articles citing this article.

Language: Английский

Citations

2
A first glimpse into the biogeographic affinities of the shallow benthic communities from the sub-Antarctic Crozet archipelago DOI Creative Commons
Quentin Jossart, Yann Lelièvre, Andreas Kelch

et al.

Frontiers in Ecology and Evolution, Journal Year: 2024, Volume and Issue: 12

Published: Sept. 4, 2024

Sub-Antarctic islands are expected to show a high degree of endemicity due their remoteness. However, biogeographic affinities in the sub-Antarctic remain poorly understood, especially marine realm. being at crossroads between Antarctic and cold temperate regions, biodiversity characterization analyses priority for monitoring rapidly assessing variations associated with environmental changes. One underexplored area is Crozet, protected archipelago located halfway Antarctica South Africa. In this study, we investigated shallow-water Crozet macrofaunal diversity, distribution patterns based on examination fieldwork specimens via thorough morphological identification genetic characterisation. The resulting dataset provides an important baseline further studies conservation strategies, compiling first taxonomic database archipelago. total, 100 morphotypes were found, belonging nine different phyla, among which arthropods (32), molluscs (18) echinoderms (17) richest. Forty-seven identified species level, 20 reported time. This confirms that known region, even compared other areas. A large proportion (62%) had circum Southern Ocean or distributions. These mostly shared Kerguelen (72%), Magellan Province (64%), Prince Edward Islands confirming found macroalgae specific groups. large-distribution statement needs be counterbalanced by detection (genetic data) more restricted distributions than four study cases (the tanaid Apseudes spectabilis , nudibranch Doris kerguelenensis polychaete Neanthes kerguelensis chiton Hemiarthrum setulosum ). Considering most no data available from likely increase alongside future investigations. addition, also few unrecognized diversity might lead descriptions new species, some endemic (e.g., within genus Harmothoe bryozoan Antarctothoa Altogether, stresses need maintain efforts pursue integrative investigations order highlight protect its unusual diversity.

Language: Английский

Citations

2
Reassessing a cryptic history of early trilobite evolution DOI Creative Commons
James D. Holmes, Graham E. Budd

Communications Biology, Journal Year: 2022, Volume and Issue: 5(1)

Published: Nov. 4, 2022

Abstract Trilobites are an iconic Paleozoic group of biomineralizing marine euarthropods that appear abruptly in the fossil record (c. 521 million years ago) during Cambrian ‘explosion’. This sudden appearance has proven controversial ever since Darwin puzzled over lack pre-trilobitic fossils Origin Species , and it generally been assumed trilobites must have unobserved cryptic evolutionary history reaching back into Precambrian. Here we review assumptions behind this model, suggest a creates significant difficulties, including invocation rampant convergent evolution biomineralized structures abandonment synapomorphies uniting clade. We show vicariance explanation for early trilobite palaeobiogeographic patterns is inconsistent with factors controlling extant invertebrate distributions, increasingly-recognized importance long-distance dispersal. survivorship bias may explain initial rapid diversification trilobites, conclude group’s at c. Ma closely reflects their origins.

Language: Английский

Citations

10