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Blar i Bergen Open Research Archive på forfatter "Rapp, Hans Tore"

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    • Benthic Communities on the Mohn’s Treasure Mound: Implications for Management of Seabed Mining in the Arctic Mid-Ocean Ridge 

      Ramirez-Llodra, Eva; Hilário, Ana; Paulsen, Emil; Costa, Carolina; Bakken, Torkild; Johnsen, Geir; Rapp, Hans Tore (Journal article; Peer reviewed, 2020)
      The Mohn’s Treasure, described as an inactive sulfide mound, was discovered at 2,600-m depth on the Arctic Mid-Ocean Ridge (AMOR) in 2002. In 2015, we conducted the first biological survey of Mohn’s Treasure using remotely ...
    • Bioactivity of Biosilica Obtained From North Atlantic Deep-Sea Sponges 

      Dudik, Olesia; Amorim, Sara; Xavier, Joana R.; Rapp, Hans Tore; Silva, Tiago H.; Pires, Ricardo A.; Reis, Rui L. (Journal article; Peer reviewed, 2021-05-17)
      Demosponges are a well-known source of a plethora of bioactive compounds. In particular, they are able to form a skeleton by direct deposition of silica in a process catalyzed by silicatein. Herein, we isolated biosilicas ...
    • The cladorhizid fauna (Porifera, Poecilosclerida) of the Caribbean and adjacent waters 

      Hestetun, Jon Thomassen; Pomponi, Shirley A.; Rapp, Hans Tore (Peer reviewed; Journal article, 2016-10-19)
      The carnivorous sponge family Cladorhizidae has been subject to several recent studies, yet the cladorhizid fauna of the Caribbean and adjacent areas remain comparatively poorly known. In this article we provide a description ...
    • Climate change winner in the deep sea? Predicting the impacts of climate change on the distribution of the glass sponge Vazella pourtalesii 

      Beazley, Lindsay; Kenchington, Ellen; Murillo, Francisco Javier; Brickman, David; Wang, Zeliang; Davies, Andrew; Roberts, Emyr Martyn; Rapp, Hans Tore (Journal article; Peer reviewed, 2021)
      Shallow-water sponges are often cited as being ‘climate change winners’ due to their resiliency against climate change effects compared to other benthic taxa. However, little is known of the impacts of climate change on ...
    • Deep-Sea Carnivorous Sponges From the Mariana Islands 

      Hestetun, Jon Thomassen; Rapp, Hans Tore; Pomponi, Shirley (Peer reviewed; Journal article, 2019-07-10)
      Carnivorous sponges belonging to family Cladorhizidae (Porifera, Demospongiae, Poecilosclerida) are unique within phylum Porifera due to their ability to capture and envelop small prey. While other sponges use an aquiferous ...
    • Deep-sea sponge grounds as nutrient sinks: Denitrification is common in boreo-Arctic sponges 

      Rooks, Christine; Fang, James Kar-Hei; Mørkved, Pål Tore; Zhao, Rui; Rapp, Hans Tore; Xavier, Joana R; Hoffmann, Friederike (Journal article; Peer reviewed, 2020-03)
      Sponges are commonly known as general nutrient providers for the marine ecosystem, recycling organic matter into various forms of bioavailable nutrients such as ammonium and nitrate. In this study we challenge this view. ...
    • A Deep-Sea Sponge Loop? Sponges Transfer Dissolved and Particulate Organic Carbon and Nitrogen to Associated Fauna 

      Bart, Martijn C.; Hudspith, Meggie; Rapp, Hans Tore; Verdonschot, Piet F. M.; de Goeij, Jasper M. (Journal article; Peer reviewed, 2021)
      Cold-water coral reefs and sponge grounds are deep-sea biological hotspots, equivalent to shallow-water tropical coral reefs. In tropical ecosystems, biodiversity and productivity are maintained through efficient recycling ...
    • Demosponges from the Northern Mid-Atlantic Ridge shed more light on the diversity and biogeography of North Atlantic deep-sea sponges 

      Cárdenas, Paco A.; Rapp, Hans Tore (Peer reviewed; Journal article, 2015-08-06)
      In July–August 2004, the Mid-Atlantic Ridge Ecosystems (MAR-Eco) expedition collected Demospongiae (Porifera) from the Northern Mid-Atlantic Ridge (MAR) north of the Azores, between 41°N and 61°N. Demosponges were found ...
    • The Discovery and Preliminary Geological and Faunal Descriptions of Three New Steinahóll Vent Sites 

      Taylor, James; Devey, Colin; Le Saout, Morgane; Petersen, Sven; Kwasnitschka, Tom; Frutos, Inmaculada; Linse, Katrin; Lörz, Anne-Nina; Pałgan, Dominik; Tandberg, Anne Helene Solberg; Svavarsson, Jörundur; Thorhallsson, Daniel; Tomkowicz, Adrianna; Egilsdottir, Hrönn; Ragnarsson, Stefán Á.; Renz, Jasmin; Markaseva, Elena A.; Gollner, Sabine; Paulus, Eva; Kongsrud, Jon Anders; Beermann, Jan; Kocot, Kevin M.; Meißner, Karin; Bartholomä, Alexander; Hoffman, Leon; Vannier, Pauline; Marsteinsson, Viggó; Rapp, Hans Tore; Diaz-Agras, Guillermo; Tato, Ramiro; Brix, Saskia (Journal article; Peer reviewed, 2021)
      During RV MS Merian expedition MSM75, an international, multidisciplinary team explored the Reykjanes Ridge from June to August 2018. The first area of study, Steinahóll (150–350 m depth), was chosen based on previous ...
    • Do ampharetids take sedimented steps between vents and seeps? Phylogeny and habitat-use of Ampharetidae (Annelida, Terebelliformia) in chemosynthesis-based ecosystems 

      Eilertsen, Mari Heggernes; Kongsrud, Jon Anders; Alvestad, Tom; Stiller, Josefin; Rouse, Greg W; Rapp, Hans Tore (Peer reviewed; Journal article, 2017-10-31)
      Background: A range of higher animal taxa are shared across various chemosynthesis-based ecosystems (CBEs), which demonstrates the evolutionary link between these habitats, but on a global scale the number of species ...
    • Drivers of Megabenthic Community Structure in One of the World’s Deepest Silled-Fjords, Sognefjord (Western Norway) 

      Meyer, Heidi Kristina; Roberts, Emyr Martyn; Mienis, Furu; Rapp, Hans Tore (Journal article; Peer reviewed, 2020-06-09)
      The Sognefjord is the longest (205 km) and deepest (1308 m) fjord in Norway, and the second-longest in the world. Coast-fjord exchange in Sognefjord is limited by a seaward sill at 170 m water depth, which causes a clear ...
    • Exitomelita sigynae gen. et sp. nov.: a new amphipod from the Arctic Loki Castle vent field with potential gill ectosymbionts 

      Tandberg, Anne Helene; Rapp, Hans Tore; Schander, Christoffer; Vader, Wim; Sweetman, Andrew K.; Berge, Jørgen (Peer reviewed; Journal article, 2011-11-02)
      The newly discovered deep-sea hydrothermal vent field ‘‘Loki’s Castle’’ at 2,350 m depth at 70 N on the Knipovich Ridge north of the island Jan Mayen is the only known black smoker field from the Arctic Ridge system. This ...
    • Faunal trophic structure at hydrothermal vents on the southern Mohn's Ridge, Arctic Ocean 

      Sweetman, Andrew Kvassnes; Levin, Lisa; Rapp, Hans Tore; Schander, Christoffer (Peer reviewed; Journal article, 2013)
      We explore the trophic ecology of heterotrophic fauna associated with a high temperature (HT) vent, 2 low temperature vents, a ‘near-HT vent’ habitat and a non-vent site situated at upper bathyal depths on the southern ...
    • The First Cut Is the Deepest: Trawl Effects on a Deep-Sea Sponge Ground Are Pronounced Four Years on 

      Morrison, Katelin M.; Meyer, Heidi Kristina; Roberts, Emyr Martyn; Rapp, Hans Tore; Colaço, Ana; Pham, Christopher K. (Journal article; Peer reviewed, 2020)
      Few studies have described the effects of physical disturbance and post-recovery of deep-sea benthic communities. Here, we explore the status of deep-sea sponge ground communities four years after being impacted by an ...
    • Genetic connectivity from the Arctic to the Antarctic: Sclerolinum contortum and Nicomache lokii (Annelida) are both widespread in reducing environments 

      Eilertsen, Mari Heggernes; Georgieva, Magdalena N.; Kongsrud, Jon Anders; Linse, Katrin; Wiklund, Helena; Glover, Adrian G.; Rapp, Hans Tore (Peer reviewed; Journal article, 2018-03-19)
      The paradigm of large geographic ranges in the deep sea has been challenged by genetic studies, which often reveal putatively widespread species to be several taxa with more restricted ranges. Recently, a phylogeographic ...
    • Genome-wide analysis of the sox family in the calcareous sponge Sycon ciliatum: multiple genes with unique expression patterns 

      Fortunato, Sofia; Adamski, Marcin; Bergum, Brith; Guder, Corina; Jordal, Signe; Rapp, Hans Tore; Leininger, Sven; Zwafink, Christin; Adamska, Maja (Peer reviewed; Journal article, 2012-06-23)
      Background: Sox genes are HMG-domain containing transcription factors with important roles in developmental processes in animals; many of them appear to have conserved functions among eumetazoans. Demosponges have fewer ...
    • Glass sponge grounds on the Scotian Shelf and their associated biodiversity 

      Hawkes, Nickolas James; Korabik, Michelle; Beazley, Lindsay; Rapp, Hans Tore; Xavier, Joana R.; Kenchington, Ellen (Peer reviewed; Journal article, 2019)
      Emerald Basin on the Scotian Shelf off Nova Scotia, Canada, is home to a globally unique population of the glass sponge Vazella pourtalesi. Through the analysis of both in situ photographs and trawl catch data from annual ...
    • The Hexactinellid Deep-Water Sponge Vazella pourtalesii (Schmidt, 1870) (Rossellidae) Copes With Temporarily Elevated Concentrations of Suspended Natural Sediment 

      Wurz, Erik; Beazley, Lindsay; MacDonald, Barry; Kenchington, Ellen; Rapp, Hans Tore; Osinga, Ronald (Journal article; Peer reviewed, 2021)
      Plumes of re-suspended sediment potentially smother and clog the aquiferous system of filter-feeding sponges with unknown implications for their health. For the first time, we examined the physiological responses of repeated ...
    • The influence of vent systems on pelagic eukaryotic micro-organism composition in the Nordic Seas 

      Olsen, Bernt Rydland; Troedsson, Christofer; Hadziavdic, Kenan; Pedersen, Rolf B.; Rapp, Hans Tore (Peer reviewed; Journal article, 2015-04)
    • Long-term Observations Reveal Environmental Conditions and Food Supply Mechanisms at an Arctic Deep-Sea Sponge Ground 

      Hanz, Ulrike; Roberts, Emyr Martyn; Duineveld, Gerard; Davies, Andrew; van Haren, Hans; Rapp, Hans Tore; Reichart, Gert-Jan; Mienis, Furu (Journal article; Peer reviewed, 2021)
      Deep-sea sponge grounds are hotspots of benthic biomass and diversity. To date, very limited data exist on the range of environmental conditions in areas containing deep-sea sponge grounds and which factors are driving ...

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