Browsing NTNU Vitenskapsmuseet (VM) by Author "Ekrem, Torbjørn"

Now showing items 1-20 of 44

    • A new surface gliding species of Chironomidae: An independent invasion of marine environments and its evolutionary implications 

      Qi, Xin; Lin, Xiaolong; Ekrem, Torbjørn; Beutel, Rolf Georg; Song, Chao; Orlov, Igor; Chen, Chun-Tang; Wang, Xin-hua (Journal article; Peer reviewed, 2018)
      Insects have invaded marine habitats only rarely and secondarily. Recently, we discovered a flightless dipteran species skating rapidly on the surface of seawater ponds at the Pacific coast of eastern China. Morphological ...

    • A review of Norwegian Gymnometriocnemus (Diptera, Chironomidae) including the description of two new species and a new name for Gymnometriocnemus volitans (Goetghebuer) sensu Brundin 

      Stur, Elisabeth; Ekrem, Torbjørn (Journal article; Peer reviewed, 2015)
      Abstract Examination of the syntypes of Metriocnemus volitans Goetghebuer, 1940 revealed that these specimens belong to the genus Chaetocladius and are not con-specific with Gymnometriocnemus volitans (Goetghebuer, 1940) ...

    • Ancient origin and maternal inheritance of blue cuckoo eggs 

      Røskaft, Eivin; Møller, Anders P.; Liang, Wei; Sorenson, Michael D; Yang, Canchao; Takasu, Fugo; Stokke, Bård Gunnar; Fossøy, Frode; Moksnes, Arne; Ekrem, Torbjørn; Rutila, Jarkko (Journal article; Peer reviewed, 2016)
      Maternal inheritance via the female-specific W chromosome was long ago proposed as a potential solution to the evolutionary enigma of co-existing host-specific races (or ‘gentes’) in avian brood parasites. Here we report ...

    • Back from the Past: DNA Barcodes and Morphology Support Ablabesmyia americana Fittkau as a Valid Species (Diptera: Chironomidae) 

      Stur, Elisabeth; da Silva, Fabio Laurindo; Ekrem, Torbjørn (Journal article; Peer reviewed, 2019)
      Abstract: Short, standardized gene fragments for species identification (DNA barcodes) have proven effective in delineating closely-related insect species, and can be critical characters to include in taxonomic studies. ...

    • BAGS: An automated Barcode, Audit & Grade System for DNA barcode reference libraries 

      Fontes, João T.; Vieira, Pedro E.; Ekrem, Torbjørn; Soares, Pedro; Costa, Filipe O. (Peer reviewed; Journal article, 2020)
      Biodiversity studies greatly benefit from molecular tools, such as DNA metabarcoding, which provides an effective identification tool in biomonitoring and conservation programmes. The accuracy of species‐level assignment, ...

    • The Chironomidae (Diptera) of Svalbard and Jan Mayen 

      Stur, Elisabeth; Ekrem, Torbjørn (Peer reviewed; Journal article, 2020)
      Non-biting midges of the fly family Chironomidae are extremely abundant and diverse in Arctic regions and are essential components of Arctic ecosystems. Modern identification tools based on documented records of Arctic ...

    • Choice of DNA extraction method affects DNA metabarcoding of unsorted invertebrate bulk samples 

      Majaneva, Markus; Diserud, Ola Håvard; Hajibabaei, Mehrdad; Eagle, Shannon; Ekrem, Torbjørn (Journal article; Peer reviewed, 2018)
      Characterisation of freshwater benthic biodiversity using DNA metabarcoding may allow more cost-effective environmental assessments than the current morphological-based assessment methods. DNA metabarcoding methods where ...

    • Coverage and quality of DNA barcode references for Central and Northern European Odonata 

      Geiger, Matthias; Koblmüller, Stephan; Assandri, Giacomo; Chovanec, Andreas; Ekrem, Torbjørn; Fischer, Iris; Galimberti, Andrea; Grabowski, Michał; Haring, Elisabeth; Hausmann, Axel; Hendrich, Lars; Koch, Stefan; Mamos, Tomasz; Rothe, Udo; Rulik, Björn; Rewicz, Tomasz; Sittenthaler, Marcia; Stur, Elisabeth; Tonczyk, Grzegorz; Zangl, Lukas; Moriniere, Jerome (Peer reviewed; Journal article, 2021)
      Background: Dragonflies and damselflies (Odonata) are important components in biomonitoring due to their amphibiotic lifecycle and specific habitat requirements. They are charismatic and popular insects, but can be challenging ...

    • Disentangling the identity of Lebertia porosa Thor, 1900 using integrative taxonomy (Acari: Hydrachnidia) 

      Tyukosova, Valentina; Gerecke, Reinhard; Stur, Elisabeth; Ekrem, Torbjørn (Journal article; Peer reviewed, 2022)
      Initial analyses of DNA barcode data from Norwegian populations attributed to the water mite Lebertia porosa Thor, 1900 revealed large genetic divergence and potentially cryptic species level diversity. We used one ...

    • DNA barcode data reveal biogeographic trends in Arctic non-biting midges 

      Ekrem, Torbjørn; Stur, Elisabeth; Orton, Matthew J.; Adamowicz, Sarah J. (Journal article; Peer reviewed, 2018)
      Chironomid flies (non-biting midges) are among the most abundant and diverse animals in Arctic regions, but detailed analyses of species distributions and biogeographical patterns are hampered by challenging taxonomy and ...

    • DNA barcode reference libraries for the monitoring of aquatic biota in Europe: Gap-analysis and recommendations for future work 

      Weigand, Hannah; Beermann, Arne J.; Čiampor, Fedor; Costa, Filipe O.; Csabai, Zoltán; Duarte, Sofia; Geiger, Matthias F.; Grabowski, Michał; Rimet, Frédéric; Rulik, Björn; Strand, Malin; Szucsich, Nicholaus; Weigand, Alexander M.; Willassen, Endre; Wyler, Sofia A.; Bouchez, Agnès; Borja, Ángel; Čiamporová-Zaťovičová, Zuzana; Ferreira, Sónia; Dijkstra, Klaas-Douwe B.; Eisendle, Ursula; Freyhof, Jörg; Gadawski, Piotr; Graf, Wolfram; Haegerbaeumer, Arne; van der Hoorn, Berry B.; Japoshvili, Bella; Keresztes, Lujza; Keskin, Emre; Leese, Florian; Macher, Jan N.; Mamos, Tomasz; Paz, Guy; Pešić, Vladimir; Pfannkuchen, Daniela Maric; Pfannkuchen, Martin Andreas; Price, Benjamin W.; Rinkevich, Buki; Teixeira, Marcos A.L.; Várbíró, Gábor; Ekrem, Torbjørn (Journal article; Peer reviewed, 2019)
      Effective identification of species using short DNA fragments (DNA barcoding and DNA metabarcoding) requires reliable sequence reference libraries of known taxa. Both taxonomically comprehensive coverage and content quality ...

    • DNA barcodes and morphology reveal unrecognized species in Chironomidae (Diptera) 

      Lin, Xiaolong; Stur, Elisabeth; Ekrem, Torbjørn (Journal article; Peer reviewed, 2017)
      For over a decade, DNA barcoding has proven an effective modern tool in taxonomy, evolutionary biology and biodiversity research. Many new species have been discovered and described with DNA barcodes as part of their ...

    • DNA barcodes provide insights into the diversity and biogeography of the non-biting midge Polypedilum (Diptera, Chironomidae) in South America 

      da Silva, Fabio Laurindo; Pinho, Luiz Carlos; Stur, Elisabeth; Nihei, Silvio Shigueo; Ekrem, Torbjørn (Peer reviewed; Journal article, 2023)
      South America, particularly within its tropical belt, is renowned for its unparalleled high levels of species richness, surpassing other major biomes. Certain neotropical areas harbor fragmented knowledge of insect diversity ...

    • DNA barcoding for species identification of insect skins: A test on Chironomidae (Diptera) pupal exuviae 

      Kranzfelder, Petra; Ekrem, Torbjørn; Stur, Elisabeth (Journal article; Peer reviewed, 2017)
      Chironomidae (Diptera) pupal exuviae samples are commonly used for biological monitoring of aquatic habitats. DNA barcoding has proved useful for species identification of chironomid life stages containing cellular tissue, ...

    • DNA metabarcoding adds valuable information for management of biodiversity in roadside stormwater ponds 

      Sun, Zhenhua; Majaneva, Markus; Sokolova, Ekaterina; Rauch, Sébastien; Meland, Sondre; Ekrem, Torbjørn (Journal article; Peer reviewed, 2019)
      Stormwater ponds are used to compensate for the adverse effects that road runoff might have on the natural environment. Depending on their design and placement, stormwater ponds can act as both refugia and traps for local ...

    • DNA Metabarcoding of Preservative Ethanol Reveals Changes in Invertebrate Community Composition Following Rotenone Treatment 

      Kjærstad, Gaute; Majaneva, Markus; Falahati-Anbaran, Mohsen; Topstad, Lasse; Finstad, Anders Gravbrøt; Arnekleiv, Jo Vegar; Ekrem, Torbjørn (Peer reviewed; Journal article, 2022)
      The botanical compound rotenone is extensively used to eradicate populations and reduce the negative impacts of freshwater invasive animals. The method is controversial as non-target organisms often are negatively affected, ...

    • DNA-metastrekkoding til undersøkelser av invertebrater i ferskvann 

      Ekrem, Torbjørn; Majaneva, Markus (NTNU Vitenskapsmuseet naturhistorisk notat;, Research report, 2019)
      DNA-metastrekkoding (metabarcoding) er en teknikk der en ved hjelp av korte DNA-sekvenser kan identifisere artene i en miljø- eller bulkprøve (usortert samleprøve). Metoden har potensiale til å revolusjonere miljøovervåkning ...

    • 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 ...