Blar i NTNU Open på forfatter "Ekrem, Torbjørn"
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A multi-marker metabarcoding approach to study tardigrade diversity in forest ecosystems.
Topstad, Lasse (Master thesis, 2019)Som annen mikroskopisk fauna blir bjørnedyr ofte oversett i økologiske undersøkelser. Med sin kosmopolitiske utbredelse i alt fra sedimenter på havets dyp til høyalpine fjellområder, spiller bjørnedyr viktige roller i mange ... -
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 Fennoscandian Stictochironomus (Diptera: Chironomidae), with the description of a species new to science
Reistad, Ingvill (Master thesis, 2023)Chironomidae, eller fjærmygg på norsk, er en av de mest artsrike og utbredte familiene av ferskvannsinsekter i verden. Under slekten Stictochironomus Kieffer, 1919 finnes det seks beskrevne arter i Fennoskandia, men DNA ... -
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 ... -
Cryptic inter- and intraspecific variation in Norwegian Mordellistena (Coleoptera, Mordellidae)
Fosse, Aksel Johan (Master thesis, 2022)Abstract will be available on 2023-01-31 -
Cryptic species diversity and eDNA metabarcoding in marine ecosystem monitoring
Hektoen, Martin Mejdell (Doctoral theses at NTNU;2024:343, Doctoral thesis, 2024)English summary Marine sediments constitute the largest ecosystem on Earth, yet they remain poorly studied. With increasing human activities in the coastal zone, these understudied environments face unprecedented pressures ... -
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, ...