Mitogenome-based phylogeny of the gastropod order Neomphalida points to multiple habitat shifts and a Pacific origin

Frontiers in Marine Science, Год журнала: 2024, Номер 10

Опубликована: Янв. 16, 2024

Neomphalida is an order of gastropod molluscs with highly diverse morphology and a global distribution across various chemosynthesis-based ecosystems from organic falls to hot vents. The phylogenetic relationships taxa within this remain contentious, due the rarity material leading low taxonomic coverage few genetic markers used. includes three families—Melanodrymiidae, Neomphalidae, Peltospiridae—and molecular sequences are especially lacking in Melanodrymiidae. Here, we assembled total 11 mitogenomes covering these families 14 genus-level groups reconstruct most complete phylogeny date. Our current result recovered monophyly maximum support likely interfamilial relationship (Melanodrymiidae + Neomphalidae) Peltospiridae. These indicate possibility habitat shifting non-chemosynthetic deep sea vent then sunken wood, accompanied by elevated mitogenome rearrangements amino acid substitution rates By mapping species on phylogeny, our findings suggest Pacific origin multiple historical dispersal events Peltospiridae Indian Ocean at least once Atlantic.

Язык: Английский

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Fluid chemistry alters faunal trophodynamics but not composition on the deep-sea Capelinhos hydrothermal edifice (Lucky Strike vent field, Mid-Atlantic Ridge)

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Янв. 22, 2024

Abstract The recently discovered deep-sea Capelinhos hydrothermal edifice, ~ 1.5 km of the main Lucky Strike (LS) vent field (northern Mid-Atlantic Ridge), contrasts with other LS edifices in having poorly-altered end-member fluids low pH and chlorine, high metal concentrations. unique chemistry location offer opportunity to test effects local abiotic filters on faunal community structure while avoiding often-correlated influence dispersal limitation depth. In this paper, we characterize for first time distribution patterns communities, analyze benthic invertebrates (> 250 µm) inhabiting diffusive-flow areas their trophic structures (δ 13 C, δ 15 N 34 S). We hypothesized that communities would differ from those nearest edifices, showing an impoverished species subset due potential toxicity chemical environment. Conversely, our results show that: (1) resembles assemblages visually dominated by shrimps (close high-temperature focused-fluid areas) mussels (at low-temperature diffuse flow areas); (2) most are well-known inhabitants, including bed-forming chemosymbiotic mussel Bathymodiolus azoricus (3) as diverse edifices. On contrary, stable isotopes suggest different trophodynamics at Capelinhos. and, especially, C S values important role methane oxidation (i.e., methanotrophy), rather than sulfide thiotrophy) predominates Our indicate shows environmental conditions, trophodynamics, yet similar fauna, compared which a great plasticity LS.

Язык: Английский

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Integrative taxonomy of new neomphaloidean gastropods from deep-sea hot vents of the southwestern Pacific

Zoological Journal of the Linnean Society, Год журнала: 2024, Номер unknown

Опубликована: Май 23, 2024

Abstract Neomphaloidean gastropods are endemic to chemosynthesis-based ecosystems ranging from hot vents organic falls, and their diversity evolutionary history remain poorly understood. In the southwestern Pacific, deep-sea hydrothermal on back-arc basins volcanic arcs found in three geographically secluded regions: a western region around Manus Basin, an eastern North Fiji Lau Basins, intermediate Woodlark Basin where active venting was confirmed only recently, 2019 R/V L’Atalante CHUBACARC expedition. Although various lineages of neomphaloidean snails have been detected, typically restricted one regions, some these remained without names. Here, we use integrative taxonomy describe species: neomphalid Symmetromphalus mithril sp. nov. peltospirids Symmetriapelta becki radiata Basin. A combination shell sculpture radular characters allow morphological separation new species described congeners. molecular phylogeny reconstructed 570 bp mitochondrial cytochrome c oxidase subunit I gene placement respective genera superfamily Neomphaloidea. The finding gastropods, particularly ones provides insights implications historical role as dispersing centre, addition highlighting uniqueness faunal community.

Язык: Английский

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A new species of the thorid shrimp genus Lebbeus White, 1847 (Decapoda: Caridea) from the Amami Rift hydrothermal vent field in the Ryukyu region, Japan

Zootaxa, Год журнала: 2024, Номер 5523(2), С. 254 - 268

Опубликована: Окт. 14, 2024

A new species of the thorid shrimp genus Lebbeus White, 1847, is described and illustrated on basis two specimens collected from recently discovered Amami Rift hot vent field in Ryukyu region southwestern Japan, at a depth 628 m. parvirostris sp. nov. morphologically similar to L. microceros (Krøyer, 1841), mundus Jensen, 2006, saldanhae (Barnard, 1947), schrencki (Bražnikov, 1907), spongiaris Komai, 2001, tosaensis Hanamura & Abe, 2003, but differs all them lack pterygostomial tooth carapace female. Other diagnostic characters useful differentiating aforementioned close relatives are also discussed. Genetic analyses using sequences mitochondrial markers, including cytochrome c oxidase subunit I (COI) 16S rRNA, presented provide preliminary support for status species. second representative known active hydrothermal vents region.

Язык: Английский

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Faunal Composition of the Sumisu Caldera Hydrothermal Vent Field as a Key Baseline for Conservation in Light of Deep‐Sea Mining

Aquatic Conservation Marine and Freshwater Ecosystems, Год журнала: 2024, Номер 34(11)

Опубликована: Ноя. 1, 2024

ABSTRACT Hydrothermal vents are biodiversity hotspots on the deep seafloor powered by chemosynthetic primary production, inhabited a specially adapted fauna whose composition varies between regions. Sumisu Caldera, located approximately 500 km south of Tokyo, hosts hot vent with an unusual species among Izu–Ogasawara Arc sites and has been suggested as priority site for conservation in light upcoming deep‐sea mining massive sulfides. However, this was based just five serendipitously recorded from geological surveys. Here, we carried out first comprehensive biological sampling using two dives human‐occupied vehicle Shinkai 6500 . Together literature records, count total 54 animal which at least 25 endemic to ecosystems, drastically increasing known faunal diversity—including three sponges, one cnidarian, 12 molluscs, 23 annelids, 13 arthropods, echinoderm, fish. The presence sediments facilitating occurrence burrowing non‐endemic predators contribute high richness. Our findings make most species‐rich community entire northwestern Pacific our work serves prime example detailed surveys obtain key piece baseline data future environmental assessments. Although apparent lack sulfide deposits means is unlikely be immediate target mining, its close distance Bayonnaise Knoll major deposit possibility that it acts critical stepping‐stone population many species, well several endangered ones, presents case protection.

Язык: Английский

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The PMEL Earth-Ocean Interactions Program: Beyond Vents

Oceanography, Год журнала: 2023, Номер unknown

Опубликована: Янв. 1, 2023

As previously summarized by Hammond et al. (2015), from 1983 to 2013, the NOAA Vents program conducted systematic and multidisciplinary exploration, discovery, research related hydrothermal vents, submarine volcanic eruptions, associated ocean physical, chemical, biological processes. In 2014, divided into two programs, Earth-Ocean Interactions (EOI) Acoustics, considered a broader range of questions about how seafloor subseafloor processes contribute health, biogeochemical cycles, ecosystem diversity, climate change. Here, we highlight major accomplishments since including deep-sea technologies that EOI, Vents, Pacific Marine Environmental Laboratory (PMEL) Engineering have developed advance marine science. EOI is driven need for better observational data on issues global importance, role continental margin seeps in methane/carbon cycle, benthic ecology, fisheries habitat; systems carbon dioxide removal; potential impact mining metal sulfides services provided vents; iron functions as an essential nutrient. Ocean Exploration, Schmidt Institute, Exploration Trust, National Science Foundation supported collaborated this work. Global exploration deep sea with purpose understanding remains cornerstone

Язык: Английский

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Genetic divergence and migration patterns of a galatheoid squat lobster highlight the need for deep‐sea conservation

Molecular Ecology, Год журнала: 2023, Номер 33(1)

Опубликована: Ноя. 20, 2023

Abstract Information on genetic divergence and migration patterns of vent‐ seep‐endemic macrobenthos can help delimit biogeographical provinces provide scientific guidelines for deep‐sea conservation under the growing threats anthropogenic disturbances. Nevertheless, related studies are still scarce, impeding informed these hotspots biodiversity. To bridge this knowledge gap, we conducted a population connectivity study galatheoid squat lobster Shinkaia crosnieri – foundation species widely distributed in vent seep ecosystems Northwest Pacific. With application an interdisciplinary methodology involving genomics oceanographic approaches, unveiled two semi‐isolated lineages S . with limited asymmetrical gene flow potentially shaped by geographic settings, habitat types, ocean currents one comprising populations Okinawa Trough, those inhabiting southern trough area likely serving as source; other being Jiaolong (JR) South China Sea. The latter might have recently experienced pronounced demographic contraction exhibited introgression from Trough lineage, mediated intrusion North Pacific Intermediate Water. We then compared biogeographic between representative co‐occurring using published data. Based their subdivisions source‐sink dynamics, highlighted vents JR warrant imperative efforts to sustain biodiversity

Язык: Английский

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The Role of Reproductive Periodicity in Dispersal Among Hydrothermal Vents and its Implications for Regional Connectivity and Conservation

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2023, Номер unknown

Опубликована: Март 9, 2023

Abstract Connectivity among isolated habitat patches via planktonic larval dispersal is crucial for maintaining the regional diversity of hydrothermal vents. Despite, increasing sophistication techniques simulating dispersal, limited information on biological and behavioural traits vent-associated species has unknown affects applicability these methods conservation. Here we focus role periodic reproduction vents, as spawning increasingly been observed in a variety taxa. For generalizeability, simulate larvae under treatments aperiodic release timing at various depths, with consistant but variable duration. Our results show highly effect periodicity characteristics distribution which are heavily modified by depth source location. The capacity reproductive to impact among-site warrents further investigation into its prevelance fauna.

Язык: Английский

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High functional vulnerability across the world’s deep-sea hydrothermal vent communities

Proceedings of the National Academy of Sciences, Год журнала: 2024, Номер 121(45)

Опубликована: Окт. 28, 2024

At the nearly pristine hydrothermal vents of deep sea, highly endemic animals depend upon bacteria nourished by fluids that emerge as outflows from seafloor. These are remarkable in tolerating extreme conditions, including high heat, toxic reduced sulfide, and low oxygen. Here, we test whether vent environment has selected for functionally similar species across world’s ocean, despite well-established global geographic patterns phylogenetic distinctness. High functional redundancy pools within regions suggests environments select with specific traits. Yet, some hotspots where distinct trait compositions may represent geological idiosyncrasies habitats. Moreover, many unique, an outcome richness a system pool is small at all scales. Given proportion unique species, simulated extinctions indicate losses would rapidly translate to elimination irreplaceable could tip systems collapse. Ocean changes human-induced threats expected significantly impact human activities expand remote sea. The opportunity exists now take precautionary actions limit rates extinction ubiquitous more accessible areas Earth.

Язык: Английский

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A tale of two shrimps - Speciation and demography of two sympatric shrimp species from hydrothermal vents

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Дек. 21, 2024

Abstract Hydrothermal vents can serve as natural laboratories to study speciation processes due their fragmented distribution often with geographic barriers between habitats. Two sympatric species of Rimicaris shrimps occur at on the Izu-Bonin-Mariana volcanic arcs: loihi also found near Hawai’i and R. cambonae present Tonga Arc. These two biogeographically co-occur are genetically highly similar, raising question mechanisms how they maintain distinct species, including possibility interbreeding. Here, we use barcoding shotgun sequencing test if hybridization is occurring. We evaluate population demography over 10 years assess densities sex ratios vents. Our results support despite sympatry throughout part range presence hybrids. Different populations suggest that life-history traits such different mating systems might reinforce reproductive barriers. observed fluctuations in shrimp alongside genetic diversity, linked variations hydrothermal activity years. isolation after a rare, historical long-distance dispersal across arcs, followed by environmentally-driven may have fostered rapid divergence allopatry, although not excluded.

Язык: Английский

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