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  • 1
    Book
    Book
    Planning the management of deep-sea hydrothermal vent fields MPA in the Azores triple junction : proceedings of the workshop (2003)
    Ponta Delgada, Azores, Portugal : University of the Azores
    Details Availability
    Keywords: Hydrothermal vent ecology Congresses ; Azores ; Hydrothermal vent ecology Congresses ; North Atlantic Ocean ; Konferenzschrift
    Type of Medium: Book
    Pages: XI, 70 S , Ill., Kt , 25 cm
    ISBN: 9728612141
    Series Statement: Arquipélago 4
    Language: English
    Note: Includes bibliographical references
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  • 2
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    Resilience of benthic deep-sea fauna to mining activities (2017)
    Elsevier
    In:  Marine Environmental Research, 129 . pp. 76-101.
    Details
    Publication Date: 2020-02-06
    Description: Highlights • Deep-sea mineral exploration and exploitation licenses have been issued recently. • Mining will modify the abiotic and biotic environment. • At directly mined sites, species are removed and cannot resist disturbance. • Recovery is highly variable in distinct ecosystems and among benthic taxa. • Community changes may persist over geological time-scales at directly mined sites. Abstract With increasing demand for mineral resources, extraction of polymetallic sulphides at hydrothermal vents, cobalt-rich ferromanganese crusts at seamounts, and polymetallic nodules on abyssal plains may be imminent. Here, we shortly introduce ecosystem characteristics of mining areas, report on recent mining developments, and identify potential stress and disturbances created by mining. We analyze species’ potential resistance to future mining and perform meta-analyses on population density and diversity recovery after disturbances most similar to mining: volcanic eruptions at vents, fisheries on seamounts, and experiments that mimic nodule mining on abyssal plains. We report wide variation in recovery rates among taxa, size, and mobility of fauna. While densities and diversities of some taxa can recover to or even exceed pre-disturbance levels, community composition remains affected after decades. The loss of hard substrata or alteration of substrata composition may cause substantial community shifts that persist over geological timescales at mined sites.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: other
    DOI: 10.1016/j.marenvres.2017.04.010
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    A global perspective on the trophic geography of sharks (2018)
    Springer
    In:  Nature Ecology & Evolution, 2 (2). pp. 299-305.
    Details
    Publication Date: 2021-02-08
    Description: Sharks are a diverse group of mobile predators that forage across varied spatial scales and have the potential to influence food web dynamics. The ecological consequences of recent declines in shark biomass may extend across broader geographic ranges if shark taxa display common behavioural traits. By tracking the original site of photosynthetic fixation of carbon atoms that were ultimately assimilated into muscle tissues of 5,394 sharks from 114 species, we identify globally consistent biogeographic traits in trophic interactions between sharks found in different habitats. We show that populations of shelf-dwelling sharks derive a substantial proportion of their carbon from regional pelagic sources, but contain individuals that forage within additional isotopically diverse local food webs, such as those supported by terrestrial plant sources, benthic production and macrophytes. In contrast, oceanic sharks seem to use carbon derived from between 30° and 50° of latitude. Global-scale compilations of stable isotope data combined with biogeochemical modelling generate hypotheses regarding animal behaviours that can be tested with other methodological approaches.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1038/s41559-017-0432-z
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Societal need for improved understanding of climate change, anthropogenic impacts, and geo-hazard warning drive development of ocean observatories in European Seas (2011)
    Elsevier
    In:  Progress in Oceanography, 91 (1). pp. 1-33.
    Details
    Publication Date: 2019-09-23
    Description: Society’s needs for a network of in situ ocean observing systems cross many areas of earth and marine science. Here we review the science themes that benefit from data supplied from ocean observatories. Understanding from existing studies is fragmented to the extent that it lacks the coherent long-term monitoring needed to address questions at the scales essential to understand climate change and improve geo-hazard early warning. Data sets from the deep sea are particularly rare with long-term data available from only a few locations worldwide. These science areas have impacts on societal health and well-being and our awareness of ocean function in a shifting climate. Substantial efforts are underway to realise a network of open-ocean observatories around European Seas that will operate over multiple decades. Some systems are already collecting high-resolution data from surface, water column, seafloor, and sub-seafloor sensors linked to shore by satellite or cable connection in real or near-real time, along with samples and other data collected in a delayed mode. We expect that such observatories will contribute to answering major ocean science questions including: How can monitoring of factors such as seismic activity, pore fluid chemistry and pressure, and gas hydrate stability improve seismic, slope failure, and tsunami warning? What aspects of physical oceanography, biogeochemical cycling, and ecosystems will be most sensitive to climatic and anthropogenic change? What are natural versus anthropogenic changes? Most fundamentally, how are marine processes that occur at differing scales related? The development of ocean observatories provides a substantial opportunity for ocean science to evolve in Europe. Here we also describe some basic attributes of network design. Observatory networks provide the means to coordinate and integrate the collection of standardised data capable of bridging measurement scales across a dispersed area in European Seas adding needed certainty to estimates of future oceanic conditions. Observatory data can be analysed along with other data such as those from satellites, drifting floats, autonomous underwater vehicles, model analysis, and the known distribution and abundances of marine fauna in order to address some of the questions posed above. Standardised methods for information management are also becoming established to ensure better accessibility and traceability of these data sets and ultimately to increase their use for societal benefit. The connection of ocean observatory effort into larger frameworks including the Global Earth Observation System of Systems (GEOSS) and the Global Monitoring of Environment and Security (GMES) is integral to its success. It is in a greater integrated framework that the full potential of the component systems will be realised. Highlights ► Societies increasingly depend on timely information on ecosystems and natural hazards. ► Data is needed to improve climate-related uncertainty and geo-hazard early warning. ► Observatory networks coordinate and integrate the collection of standardised data. ► Ocean observatories provide opportunity for ocean science to evolve.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    DOI: 10.1016/j.pocean.2011.05.001
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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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
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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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
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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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
  • 8
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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
  • 9
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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
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    DATA PANGAEA
  • 10
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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
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    DATA PANGAEA
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