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  • 2020-2024  (31)
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  • 1
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    Are seamounts refuge areas for fauna from polymetallic nodule fields? (2020)
    Copernicus Publications (EGU)
    Details
    Publication Date: 2023-02-08
    Description: Seamounts are abundant and prominent features on the deep-sea floor and intersperse with the nodule fields of the Clarion-Clipperton Fracture Zone (CCZ). There is a particular interest in characterising the fauna inhabiting seamounts in the CCZ because they are the only other ecosystem in the region to provide hard substrata besides the abundant nodules on the soft-sediment abyssal plains. It has been hypothesised that seamounts could provide refuge for organisms during deep-sea mining actions or that they could play a role in the (re-)colonisation of the disturbed nodule fields. This hypothesis is tested by analysing video transects in both ecosystems, assessing megafauna composition and abundance. Nine video transects (ROV dives) from two different license areas and one Area of Particular Environmental Interest in the eastern CCZ were analysed. Four of these transects were carried out as exploratory dives on four different seamounts in order to gain first insights into megafauna composition. The five other dives were carried out in the neighbouring nodule fields in the same areas. Variation in community composition observed among and along the video transects was high, with little morphospecies overlap along intra-ecosystem transects. Despite the observation of considerable faunal variations within each ecosystem, differences between seamounts and nodule fields prevailed, showing significantly different species associations characterising them, thus calling into question their use as a possible refuge area.
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Biodiversity, environmental drivers, and sustainability of the global deep-sea sponge microbiome (2022)
    Nature Research
    Details
    Publication Date: 2024-02-07
    Description: In the deep ocean symbioses between microbes and invertebrates are emerging as key drivers of ecosystem health and services. We present a large-scale analysis of microbial diversity in deep-sea sponges (Porifera) from scales of sponge individuals to ocean basins, covering 52 locations, 1077 host individuals translating into 169 sponge species (including understudied glass sponges), and 469 reference samples, collected anew during 21 ship-based expeditions. We demonstrate the impacts of the sponge microbial abundance status, geographic distance, sponge phylogeny, and the physical-biogeochemical environment as drivers of microbiome composition, in descending order of relevance. Our study further discloses that fundamental concepts of sponge microbiology apply robustly to sponges from the deep-sea across distances of 〉10,000 km. Deep-sea sponge microbiomes are less complex, yet more heterogeneous, than their shallow-water counterparts. Our analysis underscores the uniqueness of each deep-sea sponge ground based on which we provide critical knowledge for conservation of these vulnerable ecosystems.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: text
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Delayed response of hermit crabs carrying anemones to a benthic impact experiment at the deep-sea nodule fields of the Peru Basin? (2023)
    Elsevier
    Details
    Publication Date: 2024-02-07
    Description: Highlights • Probeebei mirabilis with or without anemone as indicator of changed environment. • 26 years after disturbance population densities changed significantly. • Possible delayed response to anthropogenic disturbance experiment. • Need for long-term (〉30 yrs) monitoring surveys post-disturbance in the abyss. The deep Peru Basin is characterised by a unique abyssal scavenging community featuring large numbers of hermit crabs (Probeebei mirabilis, Decapoda, Crustacea). These are atypical hermit crabs, not carrying a shell, but on some occasions carrying an anemone (Actiniaria). The reason why some hermit crabs carry or not carry anemones is thought to be indicative of a changed environment, outweighing the cost/benefit of their relationship. Here we present the temporal variation of abundances of P. mirabilis with and without anemones, spanning more than two decades, following a benthic impact experiment. An overall decrease in hermit crab densities was observed, most noticeable and significant after 26 years and characterised by a loss of Actiniaria on the Probeebei mirabilis' pleon. Whether this is a delayed response to the benthic impact experiment carried out 26 years’ prior or a natural variation in the population remains to be corroborated by an extension of the time-series. Attention is drawn to the limitations of our knowledge over time and space of the abyssal community dynamics and the urgent necessity to fill in these gaps prior to any type of deep-sea exploitation.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Deep-sea impacts of climate interventions (2023)
    AAAS (American Association for the Advancement of Science)
    Details
    Publication Date: 2024-01-08
    Description: Ocean manipulation to mitigate climate change may harm deep-sea ecosystems
    Type: Article , PeerReviewed
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    Records of distribution of deep-sea lithistids (Porifera, Heteroscleromorpha) of the Azores archipelago (2021)
    PANGAEA
    Details
    Publication Date: 2023-09-21
    Description: Records of distribution of deep-sea lithistids (Porifera, Heteroscleromorpha) of the Azores archipelago
    Keywords: ARQDACO_2008a; ARQDACO_2008b; ARQDACO-32-P10a; ARQDACO-32-P10b; ARQDACO-32-P10c; Arquipelago2010a; Arquipelago2010b; Arquipelago2010c; B_LL; Bottom longline; Bottom trawl; BT; Campaign; Class; CoralFishD-33-V10_1; CoralFishD-33-V10_2; CoralFishD-33-V10_3; CoralFishD-33-V10_4; CoralFishD-33-V10_5; CoralFishD-33-V10_6; CoralFishD-33-V10_7; CoralFishD-33-V10_8; CoralFishD-33-V10_9; CoralfishObservers_1; CoralfishObservers_10; CoralfishObservers_11; CoralfishObservers_12; CoralfishObservers_13; CoralfishObservers_14; CoralfishObservers_15; CoralfishObservers_16; CoralfishObservers_17; CoralfishObservers_18; CoralfishObservers_19; CoralfishObservers_2; CoralfishObservers_20; CoralfishObservers_21; CoralfishObservers_22; CoralfishObservers_23; CoralfishObservers_24; CoralfishObservers_25; CoralfishObservers_26; CoralfishObservers_27; CoralfishObservers_28; CoralfishObservers_29; CoralfishObservers_3; CoralfishObservers_30; CoralfishObservers_4; CoralfishObservers_5; CoralfishObservers_6; CoralfishObservers_7; CoralfishObservers_8; CoralfishObservers_9; DEECON-28-V07; DEECON-30-V08a; DEECON-30-V08b; Deep-sea Sponge Grounds Ecosystems of the North Atlantic; Depth, bottom/max; Depth, top/min; Dredge; DRG; Family; Genus; Identification; LATITUDE; Location; LONGITUDE; ManuelArriaga2007; MestreBobicha2011; Name; Order; PAoM_1887_112; PAoM_1888_198; PAoM_1888_229; PAoM_1888_234; PAoM_1888_247; PAoM_1895_578; PAoM_1895_587; PAoM_1895_597; PAoM_1895_600; PAoM_1896_654; PAoM_1896_683; PAoM_1896_702; PAoM_1896_703; PAoM_1897_866; PAoM_1897_882; PAoM_1897_899; PAoM_1897_909; PAoM_1902_1349; PAoM_1902_1367; PAoM_1905_2210; PAoM_1905_2214; PAoM_1911_3144; PAoM_unknown; Prince Albert of Monaco cruise station; Provenance/source; PTT_1955_106; PTT_1955_110; PTT_1955_62; PTT_1955_64; Reference/source; Sample method; South Atlantic Ocean; Species; SponGES; SponGES_Merces_1; SponGES_Merces_10; SponGES_Merces_11; SponGES_Merces_12; SponGES_Merces_13; SponGES_Merces_14; SponGES_Merces_2; SponGES_Merces_3; SponGES_Merces_4; SponGES_Merces_5; SponGES_Merces_6; SponGES_Merces_7; SponGES_Merces_8; SponGES_Merces_9; Station label; Subclass; Suborder; Theodore_Tissier_1955; Theodore Tissier; TRAWL; Trawl net; Uniform resource locator/link to metadata file; Vessel; VoluntaryFisher_1; VoluntaryFisher_10; VoluntaryFisher_11; VoluntaryFisher_2; VoluntaryFisher_3; VoluntaryFisher_4; VoluntaryFisher_5; VoluntaryFisher_6; VoluntaryFisher_7; VoluntaryFisher_8; VoluntaryFisher_9; Year of observation
    Type: Dataset
    Format: text/tab-separated-values, 2691 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Occurence of sponges and associated fauna on the Schultz Bank (Summit) during GO Sars cruise GS2018108 in 2018 (2021)
    PANGAEA
    Details
    Publication Date: 2023-09-21
    Description: In 2014, two experimental Agassiz trawls were conducted on the Schulz Bank; one at the summit (568–670 m depth) and one on the southwestern flank (1,464 m depth). The 3-m-wide Agassiz trawl, with a 1 cm mesh size in the cod-end, was towed along the seafloor for 676 m on the summit and 441 m on the flank, resulting in a disturbed area of 2,028 and 1,323 m2, for the summit and flank, respectively. Towing speed was maintained at around 2 knots and the initial and final position were recorded. In August 2018, the two trawl marks and four additional control transects (one on either side of the trawl mark) were surveyed while onboard the R/V G.O.Sars. Video recordings were taken along the trawl marks and control transects with the ROV AEGIR6000. Control transects were located 50 m to the east and west of each trawl mark and were performed parallel to the mark.
    Keywords: Actiniaria sp.; Ascidiacea sp.; Craniella infrequens; Deep sea; Deep-sea Sponge Grounds Ecosystems of the North Atlantic; Demospongiae indeterminata; DEPTH, water; Device type; G. O. Sars (2003); Geodia parva; Gersemia rubiformis; GS2018108; GS2018108-11-ROV-09; Haliclona sp.; Hard subst, cover; Hemigellius sp.; Hexactinellida sp.; Hexactinellida spp.; Individuals per area; LATITUDE; Lissodendoryx complicata; LONGITUDE; Macrouridae; Number; ORDINAL NUMBER; Percentage; Polymastia thielei; Poraniomorpha tumida; Rajidae, eggs; Remote operated vehicle; ROV; Schultz Bank; Sediment cover; Solaster sp.; Spicule mat, cover; Sponges; SponGES; Stelletta rhaphidiophora; Strongylocentrotus sp.; Stylocordyla borealis; Swept area; trawl
    Type: Dataset
    Format: text/tab-separated-values, 1435 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Occurence of sponges and associated fauna on the Schultz Bank (Flank) during GO Sars cruise GS2018108 in 2018 (2021)
    PANGAEA
    Details
    Publication Date: 2023-09-21
    Description: In 2014, two experimental Agassiz trawls were conducted on the Schulz Bank; one at the summit (568–670 m depth) and one on the southwestern flank (1,464 m depth). The 3-m-wide Agassiz trawl, with a 1 cm mesh size in the cod-end, was towed along the seafloor for 676 m on the summit and 441 m on the flank, resulting in a disturbed area of 2,028 and 1,323 m², for the summit and flank, respectively. Towing speed was maintained at around 2 knots and the initial and final position were recorded. In August 2018, the two trawl marks and four additional control transects (one on either side of the trawl mark) were surveyed while onboard the R/V G.O.Sars. Video recordings were taken along the trawl marks and control transects with the ROV AEGIR6000. Control transects were located 50 m to the east and west of each trawl mark and were performed parallel to the mark.
    Keywords: Actiniaria sp.; Ascidiacea sp.; Craniella infrequens; Crinoidea; Deep sea; Deep-sea Sponge Grounds Ecosystems of the North Atlantic; Demospongiae indeterminata; G. O. Sars (2003); Geodia hentscheli; GS2018108; GS2018108-27-ROV-19; Haliclona sp.; Hexactinellida spp.; Identification; Indeterminata; Individuals per area; LATITUDE; LONGITUDE; Lycodes diapterus; Lycopodina sp.; Nephrops norvegicus; Pedunculata; Remote operated vehicle; ROV; Schultz Bank; Solaster sp.; Sponges; SponGES; Stylocordyla borealis; Swept area; Transect number; trawl; Trawling distance; Treatment; Umbellula sp.
    Type: Dataset
    Format: text/tab-separated-values, 728 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Exploring functional traits of fish species in the Azores archipelago: a database compilation (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-03
    Description: This database contains functional traits of target and non-target fish species (Actinopterygii and Elasmobranchii) from the Azores archipelago, Portugal. The included traits are reproductive guilds, body shape, position in water column, mean temperature preference (ᵒC), generation time (years), maximum depth (m), trophic position, growth coefficient (K), size at first maturity (cm), food consumption (Q/B), fecundity, and maximum body size (cm). The traits scores were assigned based on databases provided by FishBase (Froese and Pauly, 2023), and Trindade-Santos et al. (2020). Additionally, relevant literature was also utilized. These traits were selected based on biological and ecological knowledge of species critical for ecological processes in marine ecosystems, as well as data availability. The selected traits are associated with fish functions including habitat use, locomotion, feeding, and life history.
    Keywords: Actinopterygii; Azores; Azores_FUNTraits_Fish_2023; Body shape; Class; Database; Depth zone; Distribution depth, maximum; elasmobranchs; Event label; Family; Fecundity; Fecundity, eggs per female, max; Fecundity, eggs per female, min; fish fauna; Food consumption; FunAzores; functional diversity; Functional traits and ecological processes in the Azores Marine Park : Understanding the biodiversity-ecosystem functioning; Generation time; Growth, relative; Length, first maturity; Literature search; Location; Ocean; Order; Reference/source; Reproductive guild; Size; Species; Species, unique identification (URI); Species code; Target species; Temperature preference; trait diversity; traits; Trophic level; Type of study
    Type: Dataset
    Format: text/tab-separated-values, 16473 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Compilation of data to assess trophic interactions in mesopelagic food webs in the central and Northeast Atlantic, and in the Mediterranean Sea (2022)
    PANGAEA
    Details
    Publication Date: 2024-02-17
    Description: Mesopelagic organisms play a critical role in marine ecosystems, channelling energy and organic matter across food webs and serving as the primary prey for many open-ocean predators. Nevertheless, trophic pathways involving mesopelagic organisms are poorly understood and their contribution to food web structure remains difficult to assess (St. John et al., 2016). Existing data to assess mesopelagic feeding interactions and energy transfer are scattered in the literature or remain unpublished, making it difficult to locate and use such datasets. As part of the EU funded project SUMMER - Sustainable Management of Mesopelagic Resources H2020-BG-2018-2, GA: 817806) (https://summerh2020.eu/), we created MesopTroph, a georeferenced database of diet, trophic biogeochemical markers, and energy content of mesopelagic organisms and other marine taxa from the Northeast Atlantic and Mediterranean Sea, compiled from 191 published and non-published sources. MesopTroph includes seven datasets: (i) diet compositions from stomach content analysis, (ii) stable isotopes of carbon and nitrogen (δ13C and δ15N), (iii) fatty acid trophic markers (FATM), (iv) major and trace elements, (v) energy density, (vi) estimates of diet proportions, and (vii) trophic positions. The database contains information from 4918 samples, representing 51119 specimens from 499 species or genera, covering a wide range of trophic guilds and taxonomic groups. Metadata provided for each record include the location, dates and method of sample collection, taxonomic ranks (phylum, class, order, family), number and size (or size range) of sampled organisms, method/model used in data analysis, reference and DOI of the original data source. Compiled data were checked for errors, missing information, and to avoid duplicate entries, and scientific names and taxonomy were standardized.
    Keywords: diet composition; diet proportions; energy density; fatty acids; major and trace element data; Mediterranean; megafauna; mesopelagic food web; mesopelagic organisms; North Atlantic; Stable isotopes; Stomach contents; SUMMER; Sustainable Management of Mesopelagic Resources; trophic markers; trophic position
    Type: Dataset
    Format: application/zip, 7 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Compilation of stable nitrogen and carbon isotope ratios of marine biota from the central and Northeast Atlantic, and the Mediterranean Sea (2022)
    PANGAEA
    Details
    Publication Date: 2024-03-08
    Description: Bulk stable isotope ratios, primarily of carbon (δ13C) and nitrogen (δ15N), are increasingly used to examine predator-prey interactions and food web structure. We compiled δ13C and δ15N values of marine taxa from 56 published sources to support investigations on trophic interactions in mesopelagic food webs and assess the importance of mesopelagic organisms in the marine ecosystem. A total of 2095 records were collected, representing 8716 individual organisms from 349 unique species or genera sampled across the central and Northeast Atlantic, and the Mediterranean Sea, between 1905 and 2020. Records include 185 benthic and pelagic fish, 47 cephalopods, 31 marine mammals, 30 crustaceans, 26 elasmobranchs, 16 seabirds, 4 marine turtles, 4 jelly fish, 3 copepods, 2 salps, in addition to data from several organisms only identified to higher taxonomic ranks (family or above). The dataset includes isotopic ratios measured in the tissues or in the whole body of individual organisms, or mean values (and standard deviations) from pooled samples. Because lipids have more negative δ13C values relative to other major biochemical compounds in plant and animal tissues (DeNiro & Epstein, 1977), many studies correct for the lipid effect by extracting lipids from samples before analysis, or a posteriori, through mathematical corrections (Post, 2002). Therefore, δ13C values were reported as uncorrected, lipid-extracted, or mathematically-corrected. When available, the total organic carbon to nitrogen ratio (C:N) was included. For each data record, we also provided the sampling location, geographic coordinates, month and year of sample collection, method of sample collection, taxonomic ranks (phylum, class, order, family), number and size (or size range) of sampled organisms, as well as the reference and DOI of the original data source, for further details on the samples analysed and/or the analytical techniques used.
    Keywords: Azores_comp; Balearic_Sea_comp; Baltimore_comp; Barents_Sea_comp; Bay_of_Biscay_comp; Bay_of_Malaga_comp; Bear_Seamount_comp; Belhaven_beach_comp; Boness_comp; Borve_comp; Brora_Beach_comp; Brue_Isle_of_Lewis_comp; Burntisland_comp; Canary_Islands_comp; Cape_Blanc_comp; Cape_Cod_comp; Cape_Verde_comp; Carbon; Carbon/Nitrogen ratio; Carbon/Nitrogen ratio, standard deviation; Catalonian_Sea_comp; Celtic_Sea_comp; Cephalopods; Chanonry_comp; Class; Comment; Condor_comp; Crustacea; Culross_comp; Cyprus_Turkey_comp; DEPTH, water; Droman_harbour_comp; Dunnet_Bay_comp; Eilean_Dubh_comp; elasmobranchs; Equatorial_comp; Event label; Eyemouth_comp; Family; fish; Galicia_comp; Gear; Greece_comp; Greenland_comp; Gulf_of_Cadiz_comp; Gulf_of_Lions_comp; HoundPt_SQueensferry_comp; Iberian_Peninsula_comp; Iceland_comp; Institution; Investigator; Isle_Of_Skye_comp; Jellyfish; Kirkcaldy_comp; Labrador_Sea_comp; LATITUDE; Location; Loch_Ewe_comp; Loch_Geshad_comp; LONGITUDE; Madeira_comp; Mains_Of_Usan_comp; Majorca_Minorca_comp; Malacleit_North_Uist_comp; marine mammals; marine turtles; Mauritania_Cape_Verde_comp; Mediterranean_comp; mesopelagic food web; Mid-Atlantic_Bight_comp; Mid-Atlantic_Ridge_comp; Month; Newfoundland_Labrador_comp; nitrogen; North_Ireland_comp; North_Sea_comp; Northeast_Atlantic_comp; Northern_British_Isles_comp; Northernmost_Skerry_comp; Nortwest_Africa_comp; Norwegian_Sea_North_comp; Number of individuals; Ocean and sea region; Order; Organisms; Persistent Identifier; Phylum; Port_of_Ness_Lewis_comp; Portugal_comp; Quinish_Mull_Argyll_comp; Record number; Reference/source; Reference of data; Replicates; Rosemarkie_comp; salps; Scotland_comp; Scotland_Wales_comp; Seabirds; Selvagens_comp; Size; South_Glendale_South_Uist_comp; Spain_comp; St_Kilda_comp; Stable isotopes; Strait_of_Gibraltar_comp; SUMMER; Sunamul_comp; Sustainable Management of Mesopelagic Resources; Sweden_comp; Taxon/taxa; Taxon/taxa, unique identification (Semantic URI); Taxon/taxa, unique identification (URI); The_Gut_comp; Tissue Descriptor; US_Virgin_Islands_comp; Village_bay_StKilda_comp; Western_Isles_comp; Year of observation; δ13C; δ13C, standard deviation; δ15N; δ15N, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 53959 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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