Reidar Elven

• Nygård, Malene Østreng; Kemppainen, Petri; Speed, James D. M.; Elven, Reidar; Flatberg, Kjell Ivar & Galten, Leif P. [Vis alle 9 forfattere av denne artikkelen] (2021). Combining population genomics and ecological niche modeling to assess taxon limits between Carex jemtlandica and C. lepidocarpa. Journal of Systematics and Evolution. ISSN 1674-4918. 59(4), s. 627–641. doi: 10.1111/jse.12743
• Nowak, Michael; Pedersen, Anne Tiril Myhre; Brysting, Anne Krag; Schrøder-Nielsen, Audun; Elven, Reidar & Bjorå, Charlotte Sletten (2020). Testing hypotheses of hybrid origins for two seashore species of Carex section Phacocystis (Cyperaceae). Botanical journal of the Linnean Society. ISSN 0024-4074. 194(1), s. 110–117. doi: 10.1093/botlinnean/boaa030 Fulltekst i vitenarkiv
• Sandvik, Hanno; Hilmo, Olga; Henriksen, Snorre; Elven, Reidar; Åsen, Per Arvid & Hegre, Hanne [Vis alle 51 forfattere av denne artikkelen] (2020). Fremmede arter i Norge: resultater fra kvantitative økologiske risikovurderinger. Ecological Solutions and Evidence. ISSN 2688-8319. 1(1). doi: 10.1002/2688-8319.12006 Fulltekst i vitenarkiv Vis sammendrag

  1. Due to globalisation, trade and transport, the spread of alien species is increasing dramatically. Some alien species become ecologically harmful by threatening native biota. This can lead to irreversible changes in local biodiversity and ecosystem functioning, and, ultimately, to biotic homogenisation. 2. We risk-assessed all alien plants, animals, fungi and algae, within certain delimitations, that are known to reproduce in Norway. Mainland Norway and the Arctic archipelago of Svalbard plus Jan Mayen were treated as separate assessment areas. Assessments followed the Generic Ecological Impact Assessment of Alien Species (GEIAA) protocol, which uses a fully quantitative set of criteria. 3. A total of 1519 species were risk-assessed, of which 1183 were species reproducing in mainland Norway. Among these, 9% were assessed to have a severe impact, 7% high impact, 7% potentially high impact, and 49% low impact, whereas 29% had no known impact. In Svalbard, 16 alien species were reproducing, one of which with a severe impact. 4. The impact assessments also covered 319 so-called door-knockers, i.e. species that are likely to establish in Norway within 50 years, and 12 regionally alien species. Of the door-knockers, 8% and 10% were assessed to have a severe and high impact, respectively. 5. The impact category of most species was driven by negative interactions with native species, transformation of threatened ecosystems, or genetic contamination. The proportion of alien species with high or severe impact varied significantly across the different pathways of introduction, taxonomic groups, time of introduction, and the environments colonised, but not across continents of origin. 6. Given the large number of alien species reproducing in Norway and the preponderance of species with low impact, it is neither realistic nor necessary to eradicate all of them. Our results can guide management authorities in two ways. First, the use of quantitative assessment criteria facilitates the prioritisation of management resources across species. Second, the background information collected for each species, such as introduction pathways, area of occupancy and ecosystems affected, helps designing appropriate management measures.

• Sandvik, Hanno; Dolmen, Dag; Elven, Reidar; Falkenhaug, Tone; Forsgren, Elisabet & Hansen, Haakon [Vis alle 51 forfattere av denne artikkelen] (2019). Alien plants, animals, fungi and algae in Norway: an inventory of neobiota. Biological Invasions. ISSN 1387-3547. 21(10), s. 2997–3012. doi: 10.1007/s10530-019-02058-x Fulltekst i vitenarkiv Vis sammendrag

  We present the results of an inventory and status assessment of alien species in Norway. The inventory covered all known multicellular neobiota, 2496 in total, 1039 of which were classified as naturalised. The latter constitute c. 3% of all species known to be stably reproducing in Norway. These figures are higher than expected from Norway’s latitude, which may be due a combination of climatic and historical factors, as well as sampling effort. Most of the naturalised neobiota were plants (71%),followed by animals (21%) and fungi (8%). The main habitat types colonised were open lowlands (79%), urban environments (52%) and woodlands (42%). The main areas of origin were Europe (67%), North America (15%) and Asia (13%). For most taxa, the rate of novel introductions seems to have been increasing during recent decades. Within Norway, the number of alien species recorded per county was negatively correlated with latitude and positively correlated with human population density. In the high-Arctic territories under Norwegian sovereignty, i.e. Svalbard and Jan Mayen, 104 alien species were recorded, of which 5 were naturalised.

• Sandvik, Hanno; Hilmo, Olga; Finstad, Anders Gravbrøt; Hegre, Hanne; Moen, Toril Loennechen & Rafoss, Trond [Vis alle 10 forfattere av denne artikkelen] (2019). Generic ecological impact assessment of alien species (GEIAA): the third generation of assessments in Norway. Biological Invasions. ISSN 1387-3547. 21(9), s. 2803–2810. doi: 10.1007/s10530-019-02033-6 Fulltekst i vitenarkiv Vis sammendrag

  The Generic Ecological Impact Assessment of Alien Species (GEIAA) is described. It comprises a set of criteria and an assessment procedure. The set of criteria consists of three criteria that quantify invasion potential, and six criteria that capture the ecological effects of alien species. The threshold values for all criteria are numerically defined, rendering the set of criteria fully quantitative. Genericity is ensured by using criteria that are applicable to all taxonomic groups and in all habitats. In being generic, quantitative, ecological and normatively neutral, the criteria were inspired by the international Red List criteria. Capturing both invasion potential and effect, GEIAA can be regarded as a full ecological impact assessment. The assessment procedure contains guidelines on documentation, the collection of background information, the handling of uncertainty, and quality assurance. GEIAA represents the second revision, and thus the third generation, of assessment methodology in Norway. It has recently been used to carry out more than 2500 impact assessments of alien species in Norway and Sweden.

• Elven, Reidar; Pedersen, Anne Tiril Myhre & Bjorå, Charlotte Sletten (2017). The nomenclature of two hybrid taxa in Carex sect. Vesicariae (Cyperaceae) currently assigned as Carex rostrata var. borealis and Carex stenolepis. Phytotaxa. ISSN 1179-3155. 324(1), s. 63–72. doi: 10.11646/phytotaxa.324.1.4 Fulltekst i vitenarkiv
• Birkeland, Siri; Skjetne, Idunn Elisabeth Borgen; Brysting, Anne Krag; Elven, Reidar & Alsos, Inger Greve (2017). Living on the edge: conservation genetics of seven thermophilous plant species in a high Arctic archipelago. AoB Plants. ISSN 2041-2851. 9(1). doi: 10.1093/aobpla/plx001 Fulltekst i vitenarkiv
• Vandvik, Vigdis; Elven, Reidar & Töpper, Joachim Paul (2016). Seedling recruitment in subalpine grassland forbs: Predicting field regeneration behaviour from lab germination responses. Botany. ISSN 1916-2790. 95(1), s. 73–88. doi: 10.1139/cjb-2016-0022
• Pedersen, Anne Tiril Myhre; Nowak, Michael; Brysting, Anne Krag; Elven, Reidar & Bjorå, Charlotte Sletten (2016). Hybrid Origins of Carex rostrata var. borealis and C. stenolepis, Two Problematic Taxa in Carex section Vesicariae (Cyperaceae). PLOS ONE. ISSN 1932-6203. 11(10), s. 1–18. doi: 10.1371/journal.pone.0165430 Fulltekst i vitenarkiv
• Alsos, Inger Greve; Ehrich, Dorothee; Eidesen, Pernille Bronken; Solstad, Heidi Merethe; Westergaard, Kristine Bakke & Schonswetter, Peter [Vis alle 10 forfattere av denne artikkelen] (2015). Long-distance plant dispersal to North Atlantic islands: colonization routes and founder effect. AoB Plants. ISSN 2041-2851. 7(1), s. 1–19. doi: 10.1093/aobpla/plv036 Fulltekst i vitenarkiv Vis sammendrag

  Long-distance dispersal (LDD) processes influence the founder effect on islands.We use genetic data for 25 Atlantic species and similarities among regional floras to analyse colonization, and test whether the genetic founder effect on five islands is associated with dispersal distance, island size and species traits. Most species colonized postglacially via multiple dispersal events from several source regions situated 280 to .3000 km away, and often not from the closest ones. A strong founder effect was observed for insect-pollinated mixed maters, and it increased with dispersal distance and decreased with island size in accordance with the theory of island biogeography. Only a minor founder effect was observed for wind-pollinated outcrossing species. Colonization patterns were largely congruent, indicating that despite the importance of stochasticity, LDD is mainly determined by common factors, probably dispersal vectors. Our findings caution against a priori assuming a single, close source region in biogeographic analyses. Amplified fragment length polymorphism (AFLP); dispersal vector; founder effect; genetic diversity; islands; long-distance dispersal (LDD); postglacial; species traits.

• Alsos, Inger Greve; Ware, Christopher & Elven, Reidar (2015). Past Arctic aliens have passed away, current ones may stay. Biological Invasions. ISSN 1387-3547. 17(11), s. 3113–3123. doi: 10.1007/s10530-015-0937-9 Fulltekst i vitenarkiv
• Solstad, Heidi; Eidesen, Pernille Bronken; Little, Lorna & Elven, Reidar (2014). To valmue-arter på Svalbard, og litt om fjell- og polarvalmuer. Blyttia : Norsk botanisk forenings tidsskrift. ISSN 0006-5269. 72(3), s. 187–196. Fulltekst i vitenarkiv
• Willerslev, E; Davison, J; Moora, M; Zobel, M; Coissac, E & Edwards, ME [Vis alle 50 forfattere av denne artikkelen] (2014). Fifty thousand years of Arctic vegetation and megafaunal diet. Nature. ISSN 0028-0836. 506(7486), s. 47–51. doi: 10.1038/nature12921
• Wischmann, Finn; Elven, Reidar & Fremstad, Eli (2013). Carex heleonastes Ehrh. ex L.f. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 121–123.
• Elven, Reidar & Fremstad, Eli (2013). Humulus lupulus L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 236–240.
• Elven, Reidar & Mjelde, Marit (2013). Stuckenia vaginata (Turcz.) Holub: (Potamogeton vaginatus Turcz.). I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 405–408.
• Elven, Reidar & Mjelde, Marit (2013). Potamogeton rutilus Wolfg. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 307–309.
• Elven, Reidar & Mjelde, Marit (2013). Potamogeton obtusifolius Mert. & W.D.J.Koch. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 302–304.
• Elven, Reidar & Mjelde, Marit (2013). Potamogeton compressus L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 299–300.
• Elven, Reidar & Often, Anders (2013). Stellaria borealis Bigelow. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 396–398.
• Often, Anders & Elven, Reidar (2013). Stellaria longifolia Muhl. ex Willd. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 404–405.
• Fremstad, Eli & Elven, Reidar (2013). Centaurea phrygia L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 146–149.
• Elven, Reidar & Fremstad, Eli (2013). Callitriche hermaphroditica L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 97–99.
• Elven, Reidar & Fremstad, Eli (2013). Calamagrostis canescens (F.H.Wigg.) Roth. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 82–84.
• Elven, Reidar & Fremstad, Eli (2013). Elymus caninus (L.) L. var. muticus (Holmb.) Karlsson. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 190–192.
• Elven, Reidar & Fremstad, Eli (2013). Veronica serpyllifolia L. subsp. humifusa (Dicks.) Syme. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 445–447.
• Elven, Reidar; Mjelde, Marit & Fremstad, Eli (2013). Potamogeton friesii Rupr. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 300–302.
• Elven, Reidar; Fremstad, Eli & Marcussen, Thomas (2013). Viola epipsila Ledeb. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 447–450.
• Elven, Reidar & Fremstad, Eli (2013). Taraxacum crocodes Dahlst. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 408–410.
• Elven, Reidar (2013). Calamagrostis lapponica (Wahlenb.) Hartm. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 86–90.
• Elven, Reidar (2013). Alchemilla subglobosa C.G.Westerl. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 47–49.
• Elven, Reidar (2013). Carex aquatilis Wahlenb. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 103–107.
• Elven, Reidar (2013). Betula pendula Roth var. lapponica (Lindq.) Hämet-Ahti. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 75–76.
• Elven, Reidar (2013). Calamagrostis neglecta (Ehrh.) P.Gaertn., B.Mey. & Scherb. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 90–92.
• Elven, Reidar (2013). Atriplex lapponica Pojark. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 71–72.
• Elven, Reidar (2013). Callitriche cophocarpa Sendtn. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 95–97.
• Elven, Reidar (2013). Alchemilla propinqua H.Lindb. ex Juz. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 45–47.
• Danielsen, Anders & Elven, Reidar (2013). Calla palustris L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4.
• Elven, Reidar (2013). Draba cinerea Adams. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 180–182.
• Elven, Reidar (2013). Carex buxbaumii Wahlenb. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 109–111.
• Elven, Reidar (2013). Diphasiastrum complanatum (L.) Holub. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 174–178.
• Elven, Reidar (2013). Puccinellia phryganodes (Trin.) Scribn. & Merr. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 319–321.
• Elven, Reidar (2013). Gentianopsis detonsa (Rottb.) Ma. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 217–219.
• Elven, Reidar (2013). Puccinellia finmarchica Elven & Borgen ined. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 317–319. doi: 10.1111/j.1756-1051.2000.tb00752.x
• Elven, Reidar (2013). Gymnocarpium continentale (Petrov) Pojark. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 223–225.
• Elven, Reidar (2013). Ranunculus peltatus Schrank. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 331–334.
• Elven, Reidar (2013). Hierochloë hirta (Schrank) Borbás. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 227–229.
• Elven, Reidar (2013). Lathyrus palustris L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 245–248.
• Elven, Reidar (2013). Lycopodium annotinum L. subsp. alpestre (Hartm.) Á. & D.Löve. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 250–252.
• Wischmann, Finn & Elven, Reidar (2013). Luzula pallescens Sw. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 248–250.
• Elven, Reidar (2013). Mulgedium sibiricum (L.) Cass. ex Less. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 257–258.
• Elven, Reidar (2013). Salix starkeana Willd. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 382–384.
• Elven, Reidar (2013). Myriophyllum sibiricum Kom. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 264–266.
• Wischmann, Finn & Elven, Reidar (2013). Juncus stygius L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 242–243.
• Danielsen, Anders & Elven, Reidar (2013). Scheuchzeria palustris L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 386–387.
• Danielsen, Anders & Elven, Reidar (2013). Rhododendron tomentosum (Stokes) Harmaja. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 336–339.
• Elven, Reidar (2013). Rubus arcticus L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 347–350.
• Elven, Reidar (2013). Ranunculus subborealis Tzvelev subsp. subborealis. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 334–336.
• Elven, Reidar (2013). Rumex aquaticus L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 352–356.
• Elven, Reidar (2013). Ribes nigrum L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 339–342.
• Elven, Reidar (2013). Salix hastata L. subsp. subintegrifolia (Flod.) Flod. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 368–370.
• Elven, Reidar (2013). Salix phylicifolia L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 380–382.
• Elven, Reidar (2013). Salix myrtilloides L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 375–377.
• Elven, Reidar (2013). Stellaria humifusa Rottb. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 402–404.
• Elven, Reidar (2013). Tephroseris integrifolia (L.) Holub. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 414–416.
• Elven, Reidar (2013). Sparganium gramineum Georgi. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 395–396.
• Elven, Reidar (2013). Trisetum subalpestre (Hartm.) Neuman. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 428–429.

Se alle arbeider i Cristin

• Elven, Reidar & Fremstad, Eli (2018). Salix - vier, selje og pil i Norge. NTNU Vitenskapsmuseet. ISBN 978-82-8322-153-4. 82(1). 715 s.

Se alle arbeider i Cristin

• Sandvik, Hanno; Hilmo, Olga; Henriksen, Snorre; Elven, Reidar; Åsen, Per Arvid & Hegre, Hanne [Vis alle 51 forfattere av denne artikkelen] (2020). Data from: Ecological impact assessments of alien species in Norway.
• Bjorå, Charlotte Sletten; Nordal, Inger & Elven, Reidar (2016). Tidenes første panarktiske Flora. [Fagblad]. Apollon.
• Vandvik, Vigdis; Elven, Reidar & Töpper, Joachim Paul (2016). Data from: Seedling recruitment in subalpine grassland forbs: Predicting field regeneration behaviour from lab germination responses.
• Alsos, Inger Greve; Ehrich, Dorothee; Eidesen, Pernille Bronken; Tribsch, Andreas; Schonswetter, Peter & Westergaard, Kristine Bakke [Vis alle 13 forfattere av denne artikkelen] (2015). Colonization of Arctic islands revealed by modern and ancient DNA analyses.
• Grundt, Hanne H.; Brysting, Anne Krag & Elven, Reidar (2015). Storlind Tilia platyphyllos i Østfold og Norge: Rød eller svart? Blyttia : Norsk botanisk forenings tidsskrift. ISSN 0006-5269. 73, s. 13–22.
• Alsos, Inger Greve; Ehrich, Dorothee; Eidesen, Pernille Bronken; Schonswetter, Peter; Tribsch, Andreas & Westergaard, Kristine Bakke [Vis alle 14 forfattere av denne artikkelen] (2014). Effects of past and future climate change on plant colonization in the Arctic: insights gained from phylogeography, species distribution modelling and ancient DNA.
• Alsos, Inger Greve; Ehrich, Dorothee; Eidesen, Pernille Bronken; Pellisier, Löic; Tribsch, Andreas & Schonswetter, Peter [Vis alle 14 forfattere av denne artikkelen] (2014). Effects of past and future climate change on plant colonization of arctic islands.
• Alsos, Inger Greve; Ehrich, Dorothee; Eidesen, Pernille Bronken; Pellisier, Loic; Tribsch, Andreas & Schonswetter, Peter [Vis alle 14 forfattere av denne artikkelen] (2014). Effects of past and future climate change on plant colonization of arctic Islands.
• Elven, Reidar & Alm, Torbjørn (2013). Alopecurus arundinaceus Poir. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 59–61.
• Elven, Reidar & Alm, Torbjørn (2013). Crepis multicaulis Ledeb. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 163–164.
• Alm, Torbjørn & Elven, Reidar (2013). Stellaria fennica (Murb.) Perfil. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 398–399.
• Elven, Reidar & Alm, Torbjørn (2013). Saxifraga hirculus L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 384–386.
• Elven, Reidar & Alm, Torbjørn (2013). Dianthus superbus L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 172–174.
• Elven, Reidar & Alm, Torbjørn (2013). Thymus serpyllum L. subsp. tanaënsis (Hyl.) Jalas. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 421–423.
• Elven, Reidar & Alm, Torbjørn (2013). Thalictrum simplex L. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 418–421.
• Elven, Reidar & Alm, Torbjørn (2013). Stellaria hebecalyx Fenzl. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 399–402.
• Elven, Reidar; Fremstad, Eli & Alm, Torbjørn (2013). Introduction. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 7–34.
• Alm, Torbjørn & Elven, Reidar (2013). Veratrum lobelianum Bernh. ex Schard. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 438–440.
• Alm, Torbjørn & Elven, Reidar (2013). Allium schoenoprasum L. northern race. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 52–54.
• Elven, Reidar & Alm, Torbjørn (2013). Astragalus alpinus L. var. arcticus (Sondén) Lindm. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 68–70.
• Elven, Reidar & Alm, Torbjørn (2013). Arctagrostis latifolia (R.Br.) Griseb. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 63–64.
• Elven, Reidar & Alm, Torbjørn (2013). Chrysosplenium tetrandum (N. Lund) Th. Fr. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 151–152.
• Elven, Reidar & Alm, Torbjørn (2013). Salicornia dolichostachya Moss subsp. pojarkovae (N. Semenova) Piirainen. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 361–363.
• Elven, Reidar & Alm, Torbjørn (2013). Oxytropis campestris (L.) DC. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 270–273.
• Elven, Reidar & Alm, Torbjørn (2013). Eriophorum russeolum Fr. ex Hartm. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 205–208.
• Elven, Reidar & Alm, Torbjørn (2013). Coptidium lapponicum (L.) Rydb. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 161–162.
• Elven, Reidar & Alm, Torbjørn (2013). Conioselinum vaginatum (Spreng.) Thell. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 159–161.
• Elven, Reidar & Alm, Torbjørn (2013). Pinus sylvestris L. subsp. lapponica (Fr. ex Hartm.) Sylvén. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 288–291.
• Elven, Reidar & Alm, Torbjørn (2013). Polemonium acutiflorum Willd. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 295–296.
• Alm, Torbjørn & Elven, Reidar (2013). Picea abies (L.) H. Karst. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 282–286.
• Elven, Reidar & Alm, Torbjørn (2013). Polemonium boreale Adams. I Elven, Reidar; Fremstad, Eli & Pedersen, Oddvar (Red.), Distribution maps of Norwegian vascular plants. IV The eastern and northeastern elements. Akademika forlag. ISSN 978-82-321-0246-4. s. 296–299.
• Elven, Reidar; Økland, Karen Anna & Økland, Jan (2013). Sjøpiggknopp Sparganium gramineum funnet i Finnmark og Telemark. Blyttia : Norsk botanisk forenings tidsskrift. ISSN 0006-5269. 71(2), s. 127–131.

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