Blar i Bergen Open Research Archive på forfatter "Rapp, Hans Tore"
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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 important role of sponges in carbon and nitrogen cycling in a deep-sea biological hotspot
Hanz, Ulrike; Riekenberg, Philip; de Kluijver, Anna; van der Meer, Marcel; Middelburg, Jack J.; de Goeij, Jasper M.; Bart, Martijn C.; Wurz, Erik; Colaço, Ana; Duineveld, Gerard C. A.; Reichart, Gert-Jan; Rapp, Hans Tore; Mienis, Furu (Journal article; Peer reviewed, 2022)Deep-sea sponge grounds are hotspots of biodiversity, harbouring thriving ecosystems in the otherwise barren deep sea. It remains unknown how these sponge grounds survive in this food-limited environment. Here, we unravel ... -
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 ... -
Macro and Microstructural Characteristics of North Atlantic Deep-Sea Sponges as Bioinspired Models for Tissue Engineering Scaffolding
Martins, Eva; Rapp, Hans Tore; Xavier, Joana R.; Diogo, Gabriela S.; Reis, Rui L.; Silva, Tiago H. (Journal article; Peer reviewed, 2021)Sponges occur ubiquitously in the marine realm and in some deep-sea areas they dominate the benthic communities forming complex biogenic habitats – sponge grounds, aggregations, gardens and reefs. However, deep-sea sponges ... -
Mapping benthic ecological diversity and interactions with bottom-contact fishing on the Flemish Cap (northwest Atlantic)
Murillo, Francisco Javier; Kenchington, Ellen; Koen-Alonso, Mariano; Guijarro, J.; Kenchington, T.J.; Sacau, M.; Beazley, Lindsay; Rapp, Hans Tore (Journal article; Peer reviewed, 2020)The ecological diversity of benthic invertebrates from bottom trawl surveys was mapped for the Flemish Cap, a plateau of ~200 km radius in the northwest Atlantic. Species density (SpD), the exponential Shannon diversity ... -
A Microbial Nitrogen Engine Modulated by Bacteriosyncytia in Hexactinellid Sponges: Ecological Implications for Deep-Sea Communities
Maldonado, Manuel; López-Acosta, María; Busch, Kathrin; Slaby, Beate M.; Bayer, Kristina; Beazley, Lindsay; Hentschel, Ute; Kenchington, Ellen; Rapp, Hans Tore (Journal article; Peer reviewed, 2021-03-17)Hexactinellid sponges are common in the deep sea, but their functional integration into those ecosystems remains poorly understood. The phylogenetically related species Schaudinnia rosea and Vazella pourtalesii were herein ... -
The Microbiome and Occurrence of Methanotrophy in Carnivorous Sponges
Hestetun, Jon Thomassen; Dahle, Håkon; Jørgensen, Steffen Leth; Olsen, Bernt Rydland; Rapp, Hans Tore (Peer reviewed; Journal article, 2016-11-09)As shown by recent studies, filter-feeding sponges are known to host a wide variety of microorganisms. However, the microbial community of the non-filtering carnivorous sponges (Porifera, Cladorhizidae) has been the subject ... -
The Molecular Machinery of Gametogenesis in Geodia Demosponges (Porifera): Evolutionary Origins of a Conserved Toolkit across Animals
Koutsouveli, Vasiliki; Cárdenas, Paco; Santodomingo, Nadiezhda; Marina, Anabel; Morato, Esperanza; Rapp, Hans Tore; Riesgo, Ana (Journal article; Peer reviewed, 2020)All animals are capable of undergoing gametogenesis. The ability of forming haploid cells from diploid cells through meiosis and recombination appeared early in eukaryotes, whereas further gamete differentiation is mostly ... -
Molecular phylogenies challenge the classification of Polymastiidae (Porifera, Demospongiae) based on morphology
Plotkin, Alexander; Voigt, Oliver; Willassen, Endre; Rapp, Hans Tore (Peer reviewed; Journal article, 2016)Polymastiidae Gray, 1867 is a worldwide distributed sponge family, which has a great significance for understanding of the demosponge deep phylogeny since the former order Hadromerida Topsent, 1894 has been recently split ... -
Molecular Phylogeny of the Astrophorida (Porifera, Demospongiaep) Reveals an Unexpected High Level of Spicule Homoplasy
Cárdenas, Paco; Xavier, Joana R.; Reveillaud, Julie; Schander, Christoffer; Rapp, Hans Tore (Peer reviewed; Journal article, 2011-04-08)Background: The Astrophorida (Porifera, Demospongiaep) is geographically and bathymetrically widely distributed. Systema Porifera currently includes five families in this order: Ancorinidae, Calthropellidae, Geodiidae, ... -
Myogenesis of Siboglinum fiordicum sheds light on body regionalisation in beard worms (Siboglinidae, Annelida)
Rimskaya-Korsakova, Nadezhda; Karaseva, Nadezda; Pimenov, Timofei; Rapp, Hans Tore; Southward, Eve; Temereva, Elena; Worsaae, Katrine (Journal article; Peer reviewed, 2021)Background Many annelids, including well-studied species such as Platynereis, show similar structured segments along their body axis (homonomous segmentation). However, numerous annelid species diverge from this pattern ... -
New species of Ampharetidae (Annelida: Polychaeta) from the Arctic Loki Castle vent field
Kongsrud, Jon Anders; Eilertsen, Mari Heggernes; Alvestad, Tom; Kongshavn, Katrine; Rapp, Hans Tore (Peer reviewed; Journal article, 2016-03)Ampharetid polychaetes adapted to live in chemosynthetic environments are well known from the deep Pacific and Atlantic Oceans, but to date no such species have been reported from the Arctic Ocean. Here, we describe two ... -
A New Species of Osedax (Siboglinidae: Annelida) From Colonization Experiments in the Arctic Deep Sea
Eilertsen, Mari Heggernes; Dahlgren, Thomas Gunnar; Rapp, Hans Tore (Journal article; Peer reviewed, 2020)Large parcels of organic matter in the deep sea, such as whale carcasses, harbor a very specialized fauna, most famously the bone-eating worms in the genus Osedax (Annelida, Siboglinidae). Although Osedax was first described ... -
Nicomache (Loxochona) lokii sp. nov. (Annelida: Polychaeta: Maldanidae) from the Loki’s Castle vent field: an important structure builder in an Arctic vent system
Kongsrud, Jon Anders; Rapp, Hans Tore (Peer reviewed; Journal article, 2011-07-15)The discovery of the Loki’s Castle vent field at 2,350 m depth on the Arctic mid-ocean ridge in 2008 represents the first known black smoker vent system in the Arctic region. Preliminary results on the benthic invertebrates ... -
On giant shoulders: how a seamount affects the microbialcommunity composition of seawater and sponges
Busch, Kathrin; Hanz, Ulrike; Mienis, Furu; Mueller, Benjamin; Franke, Andre; Roberts, Emyr Martyn Tomas; Rapp, Hans Tore; Hentschel, Ute (Journal article; Peer reviewed, 2020)Seamounts represent ideal systems to study the influence and interdependency of environmental gradients at a single geographic location. These topographic features represent a prominent habitat for various forms of life, ... -
Osedax mucofloris (Polychaeta, Siboglinidae), a bone-eating marine worm new to Norway
Schander, Christoffer; Rapp, Hans Tore; Dahlgren, Thomas G. (Peer reviewed; Journal article, 2010)The bone-eating siboglinid polychaete Osedax mucofloris Glover, Källström, Smith & Dahlgren, 2005 is reported from Norwegian waters for the first time. Dense growth was found on bovine bones deposited at 118 meters depth ... -
Polymastiidae (Demospongiae: Hadromerida) with ornamented exotyles: a review of morphological affinities and description of a new genus and three new species
Plotkin, Alexander; Morrow, Christine; Gerasimova, Elena; Rapp, Hans Tore (Peer reviewed; Journal article, 2016)All polymastiid sponges displaying ornamented exotyles are reviewed and their morphological affinities are reconsidered. The study embraces all known species of Proteleia, Sphaerotylus, Trachyteleia and Tylexocladus as ... -
Reproductive Biology of Geodia Species (Porifera, Tetractinellida) From Boreo-Arctic North-Atlantic Deep-Sea Sponge Grounds
Koutsouveli, Vasiliki; Cárdenas, Paco; Conejero, Maria; Rapp, Hans Tore; Riesgo, Ana (Journal article; Peer reviewed, 2020)Boreo-arctic sponge grounds are essential deep-sea structural habitats that provide important services for the ecosystem. These large sponge aggregations are dominated by demosponges of the genus Geodia (order Tetractinellida, ... -
Rock sponges (lithistid Demospongiae) of the Northeast Atlantic seamounts, with description of ten new species
Correia De Carvalho, Francisca; Cárdenas, Paco; Ríos, Pilar; Cristobo, Javier; Rapp, Hans Tore; Xavier, Joana R. (Journal article; Peer reviewed, 2020)Background Lithistid demosponges, also known as rock sponges, are a polyphyletic group of sponges which are widely distributed. In the Northeast Atlantic (NEA), 17 species are known and the current knowledge on their ...