Blar i NTNU Open på forfatter "Ekrem, Torbjørn"
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DNAqua-Net: Developing new genetic tools for bioassessment and monitoring of aquatic ecosystems in Europe
Leese, Florian; Altermatt, F; Bouchez, A; Ekrem, Torbjørn; Hering, D; Meissner, K; Mergen, P; Pawlowski, J; Piggott, JJ; Rimet, F; Steinke, D; Taberlet, P; Weigand, AM; Abarankov, K; Beja, P; Bervoets, L; Björnsdóttir, S; Boets, P; Boggero, A; Bones, Atle M.; Vrålstad, Trude (Journal article; Peer reviewed, 2016)The protection, preservation and restoration of aquatic ecosystems and their functions are of global importance. For European states it became legally binding mainly through the EU-Water Framework Directive (WFD). In order ... -
Environmental DNA filtration techniques affect recovered biodiversity
Majaneva, Markus; Diserud, Ola Håvard; Eagle, Shannon; Boström, Erik; Hajibabaei, Mehrdad; Ekrem, Torbjørn (Journal article; Peer reviewed, 2018)Freshwater metazoan biodiversity assessment using environmental DNA (eDNA) captured on filters offers new opportunities for water quality management. Filtering of water in the field is a logistical advantage compared to ... -
The eradication of invasive species using rotenone and its impact on freshwater macroinvertebrates
Kjærstad, Gaute (Doctoral theses at NTNU;2022:97, Doctoral thesis, 2022)Norsk sammendrag Hvordan påvirkes bunndyr når fremmede arter utryddes med rotenon? Fremmede arter er arter som tilsiktet eller utilsiktet spres av mennesker til nye områder der de ikke naturlig hører hjemme. Noen av ... -
Exploring Genetic Divergence in a Species-Rich Insect Genus Using 2790 DNA Barcodes
Lin, Xiaolong; Stur, Elisabeth; Ekrem, Torbjørn (Journal article; Peer reviewed, 2015-09-25)DNA barcoding using a fragment of the mitochondrial cytochrome c oxidase subunit 1 gene (COI) has proven to be successful for species-level identification in many animal groups. However, most studies have been focused on ... -
Exploring species boundaries with multiple genetic loci using empirical data from non-biting midges
Lin, Xiaolong; Stur, Elisabeth; Ekrem, Torbjørn (Journal article; Peer reviewed, 2018)Over the past decade, molecular approaches to species delimitation have seen rapid development. However, species delimitation based on a single locus, for example, DNA barcodes, can lead to inaccurate results in cases of ... -
A faunistic study of water mites (Hydrachnidia and Halacaridae) from southern Norway
Gerecke, Reinhard; Kjærstad, Gaute; Ekrem, Torbjørn; Stur, Elisabeth (Journal article, 2022)Targeted sampling of a broad range of freshwater habitats over the past five years, combined with screening of recent records available in online databases, substantially increased the number of water mite species known ... -
The Future of DNA Barcoding: Reflections from Early Career Researchers
Grant, Danielle M.; Brodnicke, Ole Bjørn; Evankow, Ann; Ferreira, André O.; Fontes, João T.; Hansen, Aslak Kappel; Jensen, Mads Reinholdt; Kalaycı, Tuğba Ergül; Leeper, Alexandra Eve Joyce; Patil, Shalaka Kiran; Prati, Sebastian; Reunamo, Anna; Roberts, Aradhana J; Shigdel, Rajesh; Tyukosova, Valentina; Bendiksby, Mika; Blaalid, Rakel; Costa, Filipe O.; Hollingsworth, Peter M.; Stur, Elisabeth; Ekrem, Torbjørn (Journal article; Peer reviewed, 2021)Over the last two decades, the use of DNA barcodes has transformed our ability to identify and assess life on our planet. Both strengths and weaknesses of the method have been exemplified through thousands of peer-reviewed ... -
Integrative taxonomy and species delimitation of water mites: the case of the Lebertia porosa (Acari, Parasitengona, Hydrachnidia) species complex
Tyukosova, Valentina (Master thesis, 2021)Water mites form a highly diverse taxon of Acari unified by adaptations to aquatic life. Despite a high number of already described species, more than half as many remain unknown to science. Their ecology makes them good ... -
Investigating suburban micromoth diversity using DNA barcoding of malaise trap samples
Aagaard, Kaare; Berggren, Kai; McClenaghan, Beverly; Sones, Jayme; Hebert, Paul D. N.; Ekrem, Torbjørn (Journal article; Peer reviewed, 2016)Micromoths can be challenging to identify based on morphology and are frequently omitted in assessments of moth diversity. However, their species richness and biology make them important components of terrestrial ecosystems. ... -
Kartlegging av marin bløtbunnsfauna - Metodeutvikling i hydrolittoralsonen
Haugen, Grethe Sundet (Master thesis, 2016)Det er gjort få kvalitative undersøkelser på bløtbunnssamfunnet i hydrolittoralen i Norge. I denne studien ble artssammensetningen i littoralsonen fra tre forskjellige bløtbunnsstrender i Sør-Trøndelag undersøkt ved en ... -
Kunnskapsstatus for bruk av molekylære verktøy i kartlegging og overvåkning av biologisk mangfold i marine miljø
Dunshea, Glenn; Martell, Luis; Bakken, Torkild; Budaeva, Nataliya; Ekrem, Torbjørn; Tandberg, Anne Helene S.; Baussant, Thierry; de Boer, Hugo; Hestetun, Jon Thomassen; Hobæk, Anders; Kallioniemi, Eveliina; Larsen, Aud; Markussen, Stine Svalheim; Mauvisseau, Quentin; Ray, Jessica Louise; Yoccoz, Nigel; Willassen, Endre (Research report, 2021)Denne rapporten er bestilt av Miljødirektoratet fra NorBOL (Norwegian Barcode of Life), et nasjonalt nettverk av forskningsinstitusjoner som koordineres av NTNU Vitenskapsmuseet. Universitetsmuseet i Bergen har hatt ... -
Metabarcoding for use in Nordic routine aquatic biomonitoring - a validation study
Meissner, Kristian; Aroviita, Jukka; Baattrup-Pedersen, Annette; Buchner, Dominik; Ekrem, Torbjørn; Friberg, Nikolai; Johnson, Richard K.; Leese, Florian; Majaneva, Markus; Ólafsson, Jón S.; Schartau, Ann Kristin; Elbrecht, Vasco (TemaNord;, Research report, 2020)Over 75% of all lakes and 40% of all rivers in the EU are found in the Nordic countries. Freshwater biomonitoring according to the EU Water Framework Directive (WFD) has been adopted by all Nordic countries and forms an ... -
Metadata standards and practical guidelines for specimen and DNA curation when building barcode reference libraries for aquatic life
Rimet, Frédéric; Aylagas, Eva; Borja, Angel; Bouchez, Agnès; Canino, Alexis; Chauvin, Christian; Chonova, Teofana; Čiampor, Fedor; Costa, Filipe O.; Ferrari, Benoit J. D.; Gastineau, Romain; Goulon, Chloe; Gugger, Murièl; Holzmann, Maria; Jahn, Regine; Kahlert, Maria; Kusber, Wolf-Hennig; Laplace-Treyture, Christophe; Leese, Florian; Leliaert, Frederik; Mann, David G.; Marchand, Frédérik; Méléder, Vona; Pawlowski, Jan; Rasconi, Serena; Revera, Sinziana; Rougerie, Rodolphe; Schweizer, Magali; Trobajo, Rosa; Vasselon, Valentin; Vivien, Régis; Weigand, Alexander M.; Witkowski, Andrzej; Zimmermann, Jonas; Ekrem, Torbjørn (Peer reviewed; Journal article, 2021)DNA barcoding and metabarcoding is increasingly used to effectively and precisely assess and monitor biodiversity in aquatic ecosystems. As these methods rely on data availability and quality of barcode reference libraries, ... -
Molecular dietary analyses of western capercaillies (Tetrao urogallus) reveal a diverse diet
Chua, Physilia Y. S.; Lammers, Youri; Menoni, Emmanuel; Ekrem, Torbjørn; Bohmann, Kristine; Boessenkool, Sanne; Alsos, Inger Greve (Journal article; Peer reviewed, 2021)Conservation strategies centered around species habitat protection rely on species’ dietary information. One species at the focal point of conservation efforts is the herbivorous grouse, the western capercaillie (Tetrao ... -
Molecular phylogeny and temporal diversification of Tanytarsus van der Wulp (Diptera: Chironomidae) support generic synonymies, a new classification and centre of origin
Lin, Xiaolong; Stur, Elisabeth; Ekrem, Torbjørn (Journal article; Peer reviewed, 2018)Tanytarsus van der Wulp, with 355 currently known valid species, is a comparatively large genus of nonbiting midges (Diptera: Chironomidae). Relationships among Tanytarsus and associated genera and among species in the ... -
Multi-marker DNA metabarcoding reflects tardigrade diversity in different habitats
Topstad, Lasse; Guidetti, Roberto; Majaneva, Markus; Ekrem, Torbjørn (Peer reviewed; Journal article, 2021)Like meiofauna in general, tardigrades are often neglected in ecological and environmental surveys. Tardigrades occur in all parts of the world, from deep marine sediments to alpine environments, and are present in most ... -
New combinations of Afrotropical Chironomini (Diptera: Chironomidae)
Stur, Elisabeth; Ekrem, Torbjørn (Journal article; Peer reviewed, 2016)During our work on the Chironomidae chapter of the forthcoming Manual of Afrotropical Diptera we examined type material of the four Chironomini species Chironomus (Endochironomus) hamatus, Chironomus (E.) pruinosus, ... -
A new molecular phylogeny for the Tanypodinae (Diptera: Chironomidae) places the Australian diversity in a global context
Krosch, Matt N.; Silva, Fabio L; Ekrem, Torbjørn; Baker, Andrew M.; Bryant, Litticia M.; Stur, Elisabeth; Cranston, Peter S. (Peer reviewed; Journal article, 2021)The non-biting midge subfamily Tanypodinae (Diptera: Chironomidae) is species-rich, ecologically diverse, and near-globally distributed. Within the subfamily, aspects of generic and species-level taxonomy remain poorly ... -
Nuclear and mitochondrial markers suggest new species boundaries in Alloxysta (Hymenoptera: Cynipoidea: Figitidae)
Ferrer-Suay, Mar; Staverløkk, Arnstein; Selfa, Jesús; Pujade-Villar, Juli; Naik, Suresh; Ekrem, Torbjørn (Journal article; Peer reviewed, 2018)Due to their small size and smooth body, members of the figitid genus Alloxysta can be notoriously difficult to identify based on morphology alone. Moreover, several species are suspected to contain brachypterous variants ... -
Phenotypic and genetic variation within the Cricotopus sylvestris species-group (Diptera, Chironomidae), across a Nearctic - Palaearctic gradient
Gresens, Susan E.; Stur, Elisabeth; Ekrem, Torbjørn (Journal article; Peer reviewed, 2012)Intraspecific variation sometimes obscures species boundaries and makes identification of certain Chironomidae difficult. This is true for many species in the genus Cricotopus. We used DNA barcode data and multivariate ...