A5066484401- Marine and fisheries research
- Marine Biology and Ecology Research
- Marine and coastal ecosystems
- Isotope Analysis in Ecology
- Fish Ecology and Management Studies
- Marine and environmental studies
- Identification and Quantification in Food
- Oceanographic and Atmospheric Processes
- Marine Invertebrate Physiology and Ecology
- Environmental DNA in Biodiversity Studies
- Marine Bivalve and Aquaculture Studies
- Indigenous Studies and Ecology
- Marine Ecology and Invasive Species
- Food Industry and Aquatic Biology
- Geology and Paleoclimatology Research
- Ichthyology and Marine Biology
- Fish Biology and Ecology Studies
- Cephalopods and Marine Biology
- Ecology and Vegetation Dynamics Studies
- Crustacean biology and ecology
- Microbial Community Ecology and Physiology
- European and International Law Studies
- Marine and coastal plant biology
- Methane Hydrates and Related Phenomena
- Botany and Plant Ecology Studies
Norwegian Institute of Marine Research
2014-2024
Swedish University of Agricultural Sciences
2022
UiT The Arctic University of Norway
1994-2001
University of Bergen
1991
Abstract Characterization of species diversity zooplankton is key to understanding, assessing, and predicting the function future pelagic ecosystems throughout global ocean. The marine assemblage, including only metazoans, highly diverse taxonomically complex, with an estimated ~28,000 41 major taxonomic groups. This review provides a comprehensive summary DNA sequences for barcode region mitochondrial cytochrome oxidase I (COI) identified specimens. foundation this MetaZooGene Barcode Atlas...
In contrast to generally sparse biological communities in open-ocean settings, seamounts and ridges are perceived as areas of elevated productivity biodiversity capable supporting commercial fisheries. We investigated the origin this apparent enhancement over a segment North Mid-Atlantic Ridge (MAR) using sonar, corers, trawls, traps, remotely operated vehicle survey habitat, biomass, biodiversity. Satellite remote sensing provided information on flow patterns, thermal fronts, primary...
Here we present a new, pan-Atlantic compilation and analysis of data on Calanus finmarchicus abundance, demography, dormancy, egg production mortality in relation to basin-scale patterns temperature, phytoplankton biomass, circulation other environmental characteristics the context understanding factors determining distribution abundance C. across its North Atlantic habitat. A number themes emerge: (1) south-to-north transport plankton northeast contrasts with north-to-south western...
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...
Abstract Payne, M. R., Hatfield, E. C., Dickey-Collas, M., Falkenhaug, T., Gallego, A., Gröger, J., Licandro, P., Llope, Munk, Röckmann, Schmidt, J. O., and Nash, R. D. 2009. Recruitment in a changing environment: the 2000s North Sea herring recruitment failure. – ICES Journal of Marine Science, 66: 272–277. Environmentally induced change appears to be impacting (Clupea harengus). Despite simultaneously having large adult population, historically low exploitation, Stewardship Council...
Abstract The Southern Ocean is a major sink of anthropogenic CO 2 and an important foraging area for top trophic level consumers. However, iron limitation sets upper limit to primary productivity. Here we report on considerably dense late summer phytoplankton bloom spanning 9000 km in the open ocean eastern Weddell Gyre. Over its 2.5 months duration, accumulated up 20 g C m −2 organic matter, which unusually high waters. We show that, over 1997–2019, this was likely driven by anomalies...
Abstract Heino, M., Porteiro, F. Sutton, T. T., Falkenhaug, Godø, O. R., and Piatkowski, U. 2011. Catchability of pelagic trawls for sampling deep-living nekton in the mid-North Atlantic. – ICES Journal Marine Science, 68: 377–389. Material collected summer 2004 from Mid-Atlantic Ridge between Iceland Azores with three was used to estimate relative catchabilities common fish, cephalopod, decapod, jellyfish species. is defined as ratio numbers caught two trawls, standardized towed distance....
Abstract Aim Invasive species are of increasing global concern. Nevertheless, the mechanisms driving further distribution after initial establishment non‐native remain largely unresolved, especially in marine systems. Ocean currents can be a major driver governing range occupancy, but this has not been accounted for most invasion ecology studies so far. We investigate how well areas interconnected to later occupancy regions test potential role ocean secondary spread dynamics order infer...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 149:105-119 (1997) - doi:10.3354/meps149105 Diel, seasonal and ontogenetic variations in vertical distributions of four marine copepods Falkenhaug T, Tande KS, Semenova T Diel Calanus finmarchicus, Metridia longa, M. lucens Chiridius armatus Malangen, northern Norway, were determined from February until...
The diversity and distribution of gelatinous zooplankton were investigated along the northern Mid-Atlantic Ridge (MAR) from June to August 2004.Here, we present results macrozooplankton trawl sampling, as well comparisons made between five different methodologies that employed during MAR-ECO survey. In total, 16 species hydromedusae, 31 siphonophores four scyphozoans identified level samples. Additional taxa higher taxonomic levels a single ctenophore genus was observed. Samples collected at...
Abstract Metabarcoding is a rapidly developing tool in marine zooplankton ecology, although most surveys continue to rely on visual identification for monitoring purposes. We attempted resolve some of the biases associated with metabarcoding by sequencing 313-b.p. fragment COI gene 34 “mock” samples from North Sea which were pre-sorted species level, biomass and abundance estimates obtained each taxonomic group. The preserved either 97% ethanol or dehydrated 24 h drying oven at 65 °C (the...
A laboratory study was conducted using natural populations of Phaeocystis pouchetii and co-occurring crustacean zooplankton from northern Norwegian fjords. Phytoplankton communities dominated by colonial solitary cells were incubated with added spanning five orders magnitude in biomass, including the euphausiids Thysanoessa spp. calanoid copepods Calanus hyperboreus Kroyer (CV). C.finmarchicus Gunnerus (CIV-V) Acartia longiremis Liljeborg (adult females). Grazing determined changes...
Knowing the magnitude and timing of pelagic primary production is important for ecosystem carbon sequestration studies, in addition to providing basic understanding phytoplankton functioning. In this study we use data from an cruise Kong Håkon VII Hav, Atlantic sector Southern Ocean, March 2019 more than two decades satellite-derived ocean color bloom phenology. During observed blooms different phases. By correlating phenology indices (i.e., initiation end) based on satellite remote sensing...
The objective of this study was to identify the key copepod species and their life cycles, provide evidence for any seasonal spatial changes in community Malangen, a fjord located 30 km south Tromsø Northern Norway (69°30′N, 18°21′E). As result high levels freshwater run-off May, became highly stratified with sharp pycnocline at 10–30 m depth from May August. generation patterns six are described.Calanus finmarchicus produced one during spring that year, whereas two generations appeared be...
Sagitta elegans var. arctica, the dominant and locally abundant chaetognath in Barents sea, was collected from upper 50 m Arctic water masses during an ice edge bloom early summer 1983. In situ sampling made along a transect at discrete depths with 375 ?m mesh net mounted on plankton pump. Prey composition feeding rate were estimated gut content analyses preserved specimens combined data digestion times previous studies. No diel variations found activity. The diet reflected of available prey...
Abstract Johannessen, T., Dahl, E., Falkenhaug, and Naustvoll, L. J. 2012. Concurrent recruitment failure in gadoids changes the plankton community of Norwegian Skagerrak coast after 2002. – ICES Journal Marine Science, 69: 795–801. Since 1919, annual beach-seine sampling has been carried out along with main objective measuring abundance 0-group gadoids. Repeated incidents abrupt persistent collapses gadoid populations have observed locally. These linked to gradual eutrophication, which...
New baseline information is presented on biogeography, abundance and distribution of euphausiids from discrete depth samples collected throughout the water column to 3000 m at 42 locations along Mid-Atlantic Ridge (MAR) between Iceland Azores. Eighteen species were recorded, with Euphausia krohni Thysanoessa longicaudata being most abundant. Eight had not been recorded in area previously. The Subpolar Front a northern boundary some southern species, but ubiquitous that show submergence. Four...