High genomic connectivity within Anatoma (Mollusca: Vetigastropoda) at hydrothermal vents along the Central and Southeast Indian Ridge
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB63999 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR11651103.fastq.gz | Fastqsanger.gz | |||
| ERR11654403.fastq.gz | Fastqsanger.gz | |||
| ERR11654404.fastq.gz | Fastqsanger.gz | |||
| ERR11654406.fastq.gz | Fastqsanger.gz | |||
| ERR11651107.fastq.gz | Fastqsanger.gz |
Items per page: 5 1 - 5 of 125 |
Similar Datasets
Project description:Hydrothermal vents are ecosystems inhabited by a highly specialized fauna. To date, more than 30 gastropod species have been recorded from vent fields along the Central and Southeast Indian Ridge and all of them are assumed to be vent-endemic. During the INDEX project, 701 representatives of the genus Anatoma (Mollusca: Vetigastropoda) were sampled from six abyssal hydrothermal vent fields. Traditional morphology and COI barcoding of Hoffman et al. (Eur J Taxon 826:135-162, 2022) were combined with 2b-RAD sequencing to investigate the anatomid community structure and connectivity between the different vent fields. Consequently, 2b-RAD sequencing supported the primary species hypothesis (based on morphology) for 125 individuals of the recently described taxa A. discapex, A. declivis, A. laevapex and A. paucisculpta. We assigned 22 additional specimens to species with 2b-RAD sequencing and updated the community analyses that confirmed the pattern of expanding populations. Population structure and FST values indicated high connectivity along the six sampled vent fields for the three most abundant species. High levels of gene flow are suggested, pointing to high dispersal potential of the target species along the study area. However, low levels of heterozygosity revealed a small gene pool and therefore an increased vulnerability towards environmental change. Our results demonstrate that 2b-RAD sequencing, in combination with other molecular methods, can accurately characterise macrobenthic mollusc communities. Sequencing technology is an essential tool for ongoing monitoring. Furthermore, we highlight that the inferred molecular and ecological patterns provide valuable insights into hydrothermal vent ecosystems, which are crucial for the successful conservation of these ecosystems.
| S-EPMC11732982 | biostudies-literature
Project description:Southwest Indian Ridge (SWIR) is a typical oceanic ultraslow spreading ridge with intensive hydrothermal activities. The microbial communities in hydrothermal fields including primary producers to support the entire ecosystem by utilizing geochemical energy generated from rock-seawater interactions. Here we have examined the microbial community structures on four hydrothermal vents from SWIR, representing distinct characteristics in terms of temperature, pH and metal compositions, by using Illumina sequencing of the 16S small subunit ribosomal RNA (rRNA) genes, to correlate bacterial and archaeal populations with the nature of the vents influenced by ultraslow spreading features. Epsilon-, Gamma-, Alpha-, and Deltaproteobacteria and members of the phylum Bacteroidetes and Planctomycetes, as well as Thaumarchaeota, Woesearchaeota, and Euryarchaeota were dominant in all the samples. Both bacterial and archaeal community structures showed distinguished patterns compared to those in the fast-spreading East Pacific Ridge or the slow-spreading Mid-Atlantic Ridge as previously reported. Furthermore, within SWIR, the microbial communities are highly correlated with the local temperatures. For example, the sulfur-oxidizing bacteria were dominant within bacteria from low-temperature vents, but were not represented as the dominating group recovered from high temperature (over 300°C) venting chimneys in SWIR. Meanwhile, Thaumarchaeota, the ammonium oxidizing archaea, only showed high relative abundance of amplicons in the vents with high-temperature in SWIR. These findings provide insights on the microbial community in ultraslow spreading hydrothermal fields, and therefore assist us in the understanding of geochemical cycling therein.
| S-EPMC5468387 | biostudies-literature
Project description:Dorvilleids were collected from hydrothermal vents on the Southwest Indian Ridge by manned submersible Jiaolong. These represent a new species of Ophryotrocha that is here described as Ophryotrocha jiaolongisp. n. This is the first dorvilleid described from vents on the Southwest Indian Ridge. It most closely resembles another vent species, Ophryotrocha akessoni Blake, 1985 from the Galapagos Rift, but can be distinguished by its antennae, palps, jaw structure. The new species has particularly distinctive mandibles, which allow it to be easily identified.
| S-EPMC5672568 | biostudies-literature
Project description:Deep sea microbial communities play a significant role in global biogeochemical processes. However, the depth-wise metabolic potential of microbial communities in hydrothermally influenced Central Indian Ridge (CIR) and Southwest Indian Ridge (SWIR) remains elusive. In this study, a comprehensive functional microarray-based approach was used to understand factors influencing the metabolic potential of microbial communities and depth-driven differences in microbial functional gene composition in CIR and SWIR. Stratified water column sampling at surface, mid, turbid/plume layer, and near bottom was done along with pertinent environmental variables at various locations along the ridges. The majority of genes (~38%-41%) throughout the water column in both regions encoded for C-cycling, particularly starch degradation indicating the predominance of heterotrophy. Genes encoding for nitrate reduction and arsenic and mercury resistance were enriched in the turbid and/or near-bottom waters, suggesting a localized influence of hydrothermally derived substrates on the metabolic potential of microbial communities. Indices for microbial functional gene diversity (H = 9.18) and evenness (J = 0.90) were highest for samples from turbid waters at SWIR. Potential temperature-salinity profiles showed the presence of nutrient-rich upper circumpolar deep water (UCDW) at >2,000 m in the study areas. Principal component analysis revealed that inorganic nutrient availability largely influenced functional gene diversity in deeper waters. The study signifies that rather than hydrothermal input, nutrients brought into the region through the UCDW could have a larger impact on metabolic processes mediated by autochthonous microbial communities and consequently have implications on deep-sea productivity.IMPORTANCELittle is known about depth-wise metabolic potential of microbial communities in hydrothermally influenced Central Indian Ridge (CIR) and Southwest Indian Ridge (SWIR) waters. In the present study, a comprehensive functional gene microarray approach was used to reveal the metabolic potential and depth-wise variation in microbial functional genes along the ridges. Up to 41% of microbial functional genes at both locations encoded for C-cycling. Availability of hydrothermally derived substrates in plumes detected along the ridges triggered an increase in the abundance of genes encoding for remediation of polycyclic aromatics, nitrate reduction, and arsenic and mercury resistance. Rather than hydrothermal input, the functional gene diversity at >2,000 m was largely influenced by inorganic nutrients transported by the nutrient-rich upper circumpolar deep water. Findings of this study are expanding the existing knowledge on new sites of hydrothermal activity along CIR and SWIR and gaining insights into ecosystem functioning in the deep sea.
| S-EPMC11792553 | biostudies-literature
Project description:Since the 19th century, the impact of seamounts on the distribution of plankton has been a topic of considerable interest. The influence of seamounts on the biogeographic patterns of marine organisms is complex, with some aspects still under debate. It is generally accepted that seamounts can drive the upwelling of nutrient-rich deep waters. Tidal amplification, flow acceleration, and internal waves can further enhance vertical mixing, leading to increased primary productivity near seamounts. Seamounts may also act as barriers to the migration of marine organisms, affecting gene flow. Research on Pacific seamounts suggests these features might serve as "stepping stones" for the dispersal of marine species across the ocean. However, investigations of seamounts in the eastern Indian Ocean remain limited. Focusing on the Ninety East Ridge region in the eastern Indian Ocean, this study collected zooplankton samples using horizontal (surface) and vertical (0-200 m) plankton nets and measured temperature and salinity profiles with a conductivity, temperature, and depth (CTD) sensor. A total of 544 fish larvae were identified, including 260 lanternfish larvae, representing 38 species across 12 genera, determined through COI DNA barcoding. Phylogenetic trees and haplotype networks were constructed to analyze genetic distances and population structures of lanternfish species. Among the samples, intra-specific genetic distances ranged from 0% to 2.99%, while inter-specific distances ranged from 1.88% to 25.71%. Except for Notolychnus valdiviae (Brauer, 1904), the maximum intra-specific distances were lower than the minimum inter-specific distances for all species. Haplotype analysis of nine species revealed significant variations in haplotype number, structure, and spatial distribution. Specifically, Ceratoscopelus warmingii (Lütken, 1892) and N. valdiviae exhibited a notable north-south divergence pattern, consistent with the temperature and salinity distribution of the region's water masses. This conclusion was supported by analysis of molecular variance analysis, suggesting that larval stages of certain lanternfish species may struggle to cross boundaries between water masses. However, the remaining species showed no significant north-south distribution differences, possibly due to their adaptive capabilities, vertical migration patterns, or the duration of their planktonic larval stages. These findings suggest that seamounts and water mass distribution have varying implications for lanternfish species, potentially influencing gene flow and horizontal distribution patterns, which could contribute to speciation. Global climate change-induced alterations in ocean currents may profoundly impact the genetic diversity of fish species. This study provides new insights into the diversity of lanternfish in the Ninety East Ridge region and offers valuable data for understanding the biogeography of seamounts.
| S-EPMC11925047 | biostudies-literature
Project description:Continuous tow investigations have shown that the present vent field inventory along fast to intermediate spreading ridges may be underestimated by at least 3-6 times, while the limited towed line investigations of venting sites along slow to ultra-slow spreading ridges make it impossible to determine their distribution. The Chinese Dayang cruise has conducted detailed towed line surveys of hydrothermal activity on segment 27 of the ultra-slow spreading southwest Indian ridge in 2015. The results have identified as many as 9 hydrothermal fields along 85-km-long segment, including one confirmed hydrothermal field, three inferred hydrothermal fields and five suspected fields. Hydrothermal activities are not only limited along-axis but also found approximately 10 km away from the axis. These vent fields are likely powered by a seismically identified axial magma chamber, including melt migration along normal faults to flank areas. The calculated hydrothermal activity frequency on segment 27 is approximately 3.6-8 times higher than that calculated from the Interridge database, suggesting that careful system exploration can reveal more hydrothermal activities even on ultra-slow spreading ridges effected by hotspot.
| S-EPMC6614410 | biostudies-literature
Project description:Deep-sea hydrothermal vents are known as chemosynthetic ecosystems. However, high temperature vents emit light that hypothetically can drive photosynthesis in this habitat. Metagenomic studies have sporadically reported the occurrence of phototrophic populations such as cyanobacteria in hydrothermal vents. To determine how geographically and taxonomically widespread phototrophs are in deep-sea hydrothermal vents, we collected samples from three niches in a hydrothermal vent on the Southwest Indian Ridge and carried out an integrated metagenomic analysis. We determined the typical community structures of microorganisms found in active venting fields and identified populations of known potential chlorophototrophs and retinalophototrophs. Complete chlorophyll biosynthetic pathways were identified in all samples. By contrast, proteorhodopsins were only found in active beehive smoker diffusers. Taxonomic groups possessing potential phototrophy dependent on semiconductors present in hydrothermal vents were also found in these samples. This systematic comparative metagenomic study reveals the widespread distribution of phototrophic bacteria in hydrothermal vent fields. Our results support the hypothesis that the ocean is a seed bank of diverse microorganisms. Geothermal vent light may provide energy and confer a competitive advantage on phototrophs to proliferate in hydrothermal vent ecosystems.Supplementary informationThe online version contains supplementary material available at 10.1007/s42995-021-00121-y.
| S-EPMC10077154 | biostudies-literature
Project description:BackgroundThe growing interest in mineral resources of the deep sea, such as seafloor massive sulphide deposits, has led to an increasing number of exploration licences issued by the International Seabed Authority. In the Indian Ocean, four licence areas exist, resulting in an increasing number of new hydrothermal vent fields and the discovery of new species. Most studies focus on active venting areas including their ecology, but the non-vent megafauna of the Central Indian Ridge and South East Indian Ridge remains poorly known.In the framework of the Indian Ocean Exploration project in the German license area for seafloor massive sulphides, baseline imagery and sampling surveys were conducted yearly during research expeditions from 2013 to 2018, using video sledges and Remotely Operated Vehicles.New informationThis is the first report of an imagery collection of megafauna from the southern Central Indian- and South East Indian Ridge, reporting the taxonomic richness and their distribution. A total of 218 taxa were recorded and identified, based on imagery, with additional morphological and molecular confirmed identifications of 20 taxa from 89 sampled specimens. The compiled fauna catalogue is a synthesis of megafauna occurrences aiming at a consistent morphological identification of taxa and showing their regional distribution. The imagery data were collected during multiple research cruises in different exploration clusters of the German licence area, located 500 km north of the Rodriguez Triple Junction along the Central Indian Ridge and 500 km southeast of it along the Southeast Indian Ridge.
| S-EPMC8516849 | biostudies-literature
Project description:The Southwest Indian Ridge is the longest section of very slow to ultraslow-spreading seafloor in the global mid-ocean ridge system, but the biogeography and ecology of its hydrothermal vent fauna are previously unknown. We collected 21 macro- and megafaunal taxa during the first Remotely Operated Vehicle dives to the Longqi vent field at 37° 47'S 49° 39'E, depth 2800 m. Six species are not yet known from other vents, while six other species are known from the Central Indian Ridge, and morphological and molecular analyses show that two further polychaete species are shared with vents beyond the Indian Ocean. Multivariate analysis of vent fauna across three oceans places Longqi in an Indian Ocean province of vent biogeography. Faunal zonation with increasing distance from vents is dominated by the gastropods Chrysomallon squamiferum and Gigantopelta aegis, mussel Bathymodiolus marisindicus, and Neolepas sp. stalked barnacle. Other taxa occur at lower abundance, in some cases contrasting with abundances at other vent fields, and δ13C and δ15N isotope values of species analysed from Longqi are similar to those of shared or related species elsewhere. This study provides baseline ecological observations prior to mineral exploration activities licensed at Longqi by the United Nations.
| S-EPMC5155287 | biostudies-literature
Project description:The present study describes the isolation of a Thermococcus sp. strain 175 from the world‘s deepest hydrothermal vent sites known thus far – The Mid-Cayman Rise.consisting of two hydrothermal venting systems Bee Bee (or Piccard), at 4950m depth and Von Damm (or Walsh) at 2300m The strain is capable of growth over 0.1MPa (atm. Pressure) to 120MPa, the widest known range of pressure dependent growth. The study further explores piezophilic adaptation using comparative genomic tools. Insights into the transcriptome of this strain providers the first look into the transcriptional machinery of peizophilic Thermococci.
2017-08-22 | GSE70228 | GEO