Blar i forfatter "Wangensteen, Owen S."
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Temperature-dependent egg production and egg hatching rates of small egg-carrying and broadcast-spawning copepods Oithona similis, Microsetella norvegica and Microcalanus pusillus
Barth-Jensen, Coralie; Koski, Marja; Varpe, Øystein; Glad, Peter; Wangensteen, Owen S.; Præbel, Kim; Svensen, Camilla (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-07)Reproductive rates of copepods are temperature-dependent, but poorly known for small copepods at low temperatures, hindering the predictions of population dynamics and secondary production in high-latitude ecosystems. We investigated egg hatching rates, hatching success and egg production of the small copepods <i>Oithona similis</i> and <i>Microsetella norvegica</i> (sac spawners) and <i>Microcalanus ... -
To denoise or to cluster, that is not the question: optimizing pipelines for COI metabarcoding and metaphylogeography
Antich, Adrià; Palacin, Creu; Wangensteen, Owen S.; Turon, Xavier (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-05)<i>Background</i> - The recent blooming of metabarcoding applications to biodiversity studies comes with some relevant methodological debates. One such issue concerns the treatment of reads by denoising or by clustering methods, which have been wrongly presented as alternatives. It has also been suggested that denoised sequence variants should replace clusters as the basic unit of metabarcoding ... -
The Two Sides of the Mediterranean: Population Genomics of the Black Sea Urchin Arbacia lixula (Linnaeus, 1758) in a Warming Sea
Carreras, Carlos; Ordóñez, Victor; García-Cisneros, Alex; Wangensteen, Owen S.; Palacín, Creu; Pascual, Marta; Turon, Xavier (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-11-10)Global environmental changes may have a profound impact on ecosystems. In this context, it is crucial to gather biological and ecological information of the main species in marine communities to predict and mitigate potential effects of shifts in their distribution, abundance, and interactions. Using genotyping by sequencing (GBS), we assessed the genetic structure of a keystone species in the ... -
Using DNA Metabarcoding to Characterize the Prey Spectrum of Two Co-Occurring Themisto Amphipods in the Rapidly Changing Atlantic-Arctic Gateway Fram Strait
Dischereit, Annkathrin; Wangensteen, Owen S.; Præbel, Kim; Auel, Holger; Havermans, Charlotte (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-04)The two congeneric hyperiids Themisto libellula and T. abyssorum provide an important trophic link between lower and higher trophic levels in the rapidly changing Arctic marine ecosystem. These amphipods are characterized by distinct hydrographic affinities and are hence anticipated to be impacted differently by environmental changes, with major consequences for the Arctic food web. In this ...