Tom Alvestad

ORCID: 0000-0003-0204-2936
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About
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Research Areas
  • Marine Biology and Ecology Research
  • Marine Ecology and Invasive Species
  • Parasite Biology and Host Interactions
  • Isotope Analysis in Ecology
  • Marine and fisheries research
  • Leech Biology and Applications
  • Coral and Marine Ecosystems Studies
  • Geological Studies and Exploration
  • Invertebrate Taxonomy and Ecology
  • Marine and environmental studies
  • Crustacean biology and ecology
  • Coastal and Marine Management
  • Ichthyology and Marine Biology
  • Insect and Arachnid Ecology and Behavior
  • Marine animal studies overview
  • Atmospheric and Environmental Gas Dynamics
  • Genetic diversity and population structure
  • Education, Healthcare and Sociology Research
  • Arctic and Russian Policy Studies
  • Subterranean biodiversity and taxonomy
  • Methane Hydrates and Related Phenomena
  • Marine and coastal plant biology
  • Echinoderm biology and ecology
  • Underwater Acoustics Research
  • Aquatic Invertebrate Ecology and Behavior

University of Bergen
2010-2025

Senckenberg Natural History Collections Dresden
2020

Uni Research (Norway)
2015

Abstract Loki’s Castle Vent Field (LCVF, 2300 m) was discovered in 2008 and represents the first black-smoker vent field on Arctic Mid-Ocean Ridge (AMOR). However, a comprehensive faunal inventory of LCVF has not yet been published, hindering inclusion biogeographic analyses fauna. There is an urgent need to understand diversity, spatial distribution ecosystem function biological communities along AMOR, which will inform environmental impact assesments future deep-sea mining activities...

10.1038/s41598-023-46434-z article EN cc-by Scientific Reports 2024-01-02

Deep-sea research is a very active field in which environments such as hydrothermal vents are of particular interest because they host unique and often endemic fauna. In this paper, we describe new species the genus Caulleriella Chamberlin, 1919 (Annelida, Cirratulidae Ryckholt, 1851) report presence Raricirrus arcticus Buzhinskaja & Smirnov, 2017 at Loki’s Castle vent (LCVF), first detailed since original description. Both illustrated similarities with closely related discussed. We...

10.5852/ejt.2025.987.2855 article EN cc-by European Journal of Taxonomy 2025-04-04

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 number species inhabiting multiple CBEs is low. The factors shaping distributions and habitat specificity animals within poorly understood, geographic proximity depth substratum have been suggested as important. Biogeographic studies indicated that intermediate habitats such sedimented vents play an important...

10.1186/s12862-017-1065-1 article EN cc-by BMC Evolutionary Biology 2017-10-31

Abstract Background Our knowledge of the benthic fauna at lower bathyal to abyssal (LBA, > 2000 m) depths off Eastern Australia was very limited with only a few samples having been collected from these habitats over last 150 years. In May–June 2017, IN2017_V03 expedition RV Investigator sampled LBA communities along slope and abyss Australia’s eastern margin mid-Tasmania (42°S) Coral Sea (23°S), particular emphasis on describing analysing patterns biodiversity that occur within newly...

10.1186/s41200-020-00194-1 article EN cc-by Marine Biodiversity Records 2020-09-18

Recent expeditions to the North-East Atlantic and Arctic Ocean yielded an abundance of specimens resembling two species polychaetes family Cirratulidae Ryckholt, 1851 originally described in 1879 tentatively placed within genus Cirratulus Lamarck, 1818. In this study, we set out confirm their identity, assess potential presence cryptic species, determine correct generic placement, gain insights into distributions. Our approach involved comprehensive analyses using four molecular markers...

10.5852/ejt.2025.987.2869 article EN cc-by European Journal of Taxonomy 2025-04-14

ABSTRACT Cirratulidae is a group of common marine benthic annelids with about 397 nominal species described worldwide, 58 which are reported in European waters. Due to the general morphological homogeneity among from several genera, this considered difficult identify level, has complex taxonomical and nomenclatural history largely understudied. The aim study was assess diversity Available samples ranged Arctic Ocean North Svalbard, along Atlantic coast western Mediterranean Sea, intertidal...

10.1111/zsc.12729 article EN cc-by-nc Zoologica Scripta 2025-05-02

In Australia, the deep-water (bathyal and abyssal) benthic invertebrate fauna is poorly known in comparison with that of shallow (subtidal shelf) habitats. Benthic from deep eastern Australian margin was sampled systematically for first time during 2017 RV ‘Investigator’ voyage ‘Sampling Abyss’. Box core, Brenke sledge, beam trawl samples were collected at one-degree intervals Tasmania, 42°S, to southern Queensland, 24°S, 900 4800 m depth. Annelids identified by taxonomic experts on...

10.3897/zookeys.1020.57921 article EN cc-by ZooKeys 2021-02-24

Ampharetid polychaetes adapted to live in chemosynthetic environments are well known from the deep Pacific and Atlantic Oceans, but date no such species have been reported Arctic Ocean. Here, we describe two new species, Paramytha schanderi gen. et sp. nov. Pavelius smileyi nov., Loki's Castle vent field on Knipovich Ridge north–east of island Jan Mayen. The both tube-builders, found a sedimentary area at NE flank field, characterized by low-temperature venting barite chimneys. genus,...

10.1016/j.dsr2.2016.08.015 article EN cc-by Deep Sea Research Part II Topical Studies in Oceanography 2016-09-09

In this work, the diversity of genus Orbiniella in Nordic Seas and North Atlantic waters south Iceland is studied based on analyses molecular markers (mitochondrial COI, 16S rDNA nuclear ITS2) morphological characters. Our results showed presence at least five genetic lineages material which could also be morphologically identified by their segmental annulation patterns, number shape acicular spines, length pygidial lobes. The species name petersenae assigned to one restricting its...

10.3897/zookeys.1205.120300 article EN cc-by ZooKeys 2024-06-20

A new species of the genus Ampharete Malmgren, 1866 (Annelida; Ampharetidae) is described based on specimens collected during several sampling campaigns in shallow coastal waters off Galicia, NW Iberian Peninsula. santillani sp. nov. morphologically similar to lindstroemi Malmgren Hessle, 1917 but differs by larger body size, absence eyes pygidium and presence short dorsal neuropodial cirri posterior abdominal segments rather than minute rounded lobes. The external micro-morphology was...

10.1093/zoolinnean/zlx077 article EN Zoological Journal of the Linnean Society 2017-12-01

Neosabellides lizae, a new species of Ampharetidae, is described from the intertidal zone off Lizard Island, Great Barrier Reef, Queensland, Australia. The referred to genus based on shape prostomium, three pairs branchiae, 14 thoracic segments with notopodia, 12 uncinigerous segments, and first two abdominal uncinigers type. differs all known in having segments.

10.11646/zootaxa.4019.1.6 article EN Zootaxa 2015-09-18

Ampharete undecima, a new deep-sea ampharetid (Annelida, Polychaeta) from the Norwegian Sea.Memoirs of Museum Victoria 71: 11-19

10.24199/j.mmv.2014.71.02 article EN Memoirs of Museum Victoria 2014-01-01

Two new species, Melinnopsis gardelli sp. nov. and chadwicki (Annelida, Ampharetidae, Melinninae), are described from deep waters off the east coast of Australia. One hundred 11 specimens were collected during RV Investigator voyage IN2017_V03 in May–June 2017 using a beam trawl at lower bathyal depths (1000–2500 m). This is first record eastern Australian coast. The two species morphologically similar, but differ by methyl blue staining pattern, shape thoracic uncini pigmented glandular...

10.3853/j.2201-4349.72.2020.1763 article EN cc-by Records of the Australian Museum 2020-08-12

A new species of holothuroid, Pseudothyone labradorensis sp. nov. (order Dendrochirotida and family Sclerodactylidae), was discovered off the coast Labrador (eastern Canada) at a depth 740–969 m. Two specimens were described based on morphological genetic parameters. Distinctive characters included pinkish body colour, presence tube feet ‘tail’, supporting rod-shaped ossicles in feet, tentacles. To investigate its phylogenetic relationships, partial sequences COI obtained for as well type P....

10.3897/zookeys.1206.123364 article EN cc-by ZooKeys 2024-07-08
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