Siri Birkeland

• Nowak, Michael; Birkeland, Siri; Mandáková, Terezie; Choudhury, Rimjhim Roy; Guo, Xinyi & Gustafsson, A Lovisa S [Vis alle 15 forfattere av denne artikkelen] (2020). The genome of Draba nivalis shows signatures of adaptation to the extreme environmental stresses of the Arctic. Molecular Ecology Resources. ISSN 1755-098X. doi: 10.1111/1755-0998.13280.
• Birkeland, Siri; Gustafsson, A Lovisa S; Brysting, Anne Krag; Brochmann, Christian & Nowak, Michael (2020). Multiple Genetic Trajectories to Extreme Abiotic Stress Adaptation in Arctic Brassicaceae. Molecular Biology and Evolution (MBE). ISSN 0737-4038. 37(7), s. 2052–2068. doi: 10.1093/molbev/msaa068. Fulltekst i vitenarkiv
• Struck, Torsten H; Feder, Jeffrey L.; Bendiksby, Mika; Birkeland, Siri; Cerca De Oliveira, Josè & Gusarov, Vladimir [Vis alle 13 forfattere av denne artikkelen] (2017). Finding Evolutionary Processes Hidden in Cryptic Species. Trends in Ecology & Evolution. ISSN 0169-5347. 33(3), s. 153–163. doi: 10.1016/j.tree.2017.11.007. Fulltekst i vitenarkiv Vis sammendrag

  Cryptic species could represent a substantial fraction of biodiversity. However, inconsistent definitions and taxonomic treatment of cryptic species prevent informed estimates of their contribution to biodiversity and impede our understanding of their evolutionary and ecological significance. We propose a conceptual framework that recognizes cryptic species based on their low levels of phenotypic (morphological) disparity relative to their degree of genetic differentiation and divergence times as compared to non-cryptic species. We discuss how application of a more rigorous definition of cryptic species in taxonomic practice will lead to more accurate estimates of their prevalence in nature, better understanding of their distribution patterns on the tree of life, and increased abilities to resolve the processes underlying their evolution.

• 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
• 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.

• Westengen, Ola Tveitereid; Okongo, Mark Atam; Onek, Leo; Berg, Trygve; Upadhyaya, Hari & Birkeland, Siri [Vis alle 10 forfattere av denne artikkelen] (2014). Ethnolinguistic structuring of sorghum genetic diversity in Africa and the role of local seed systems. Proceedings of the National Academy of Sciences of the United States of America. ISSN 0027-8424. 111(39), s. 14100–14105. doi: 10.1073/pnas.1401646111. Vis sammendrag

  Sorghum is a drought-tolerant crop with a vital role in the livelihoods of millions of people in marginal areas. We examined genetic structure in this diverse crop in Africa. On the continentwide scale, we identified three major sorghum populations (Central, Southern, and Northern) that are associated with the distribution of ethnolinguistic groups on the continent. The codistribution of the Central sorghum population and the Nilo-Saharan language family supports a proposed hypothesis about a close and causal relationship between the distribution of sorghum and languages in the region between the Chari and the Nile rivers. The Southern sorghum population is associated with the Bantu languages of the Niger-Congo language family, in agreement with the farminglanguage codispersal hypothesis as it has been related to the Bantu expansion. The Northern sorghum population is distributed across early Niger-Congo and Afro-Asiatic language family areas with dry agroclimatic conditions. At a finer geographic scale, the genetic substructure within the Central sorghum population is associated with language-group expansions within the Nilo-Saharan language family. A case study of the seed system of the Pari people, a Western-Nilotic ethnolinguistic group, provides a window into the social and cultural factors involved in generating and maintaining the continent-wide diversity patterns. The age-grade system, a cultural institution important for the expansive success of this ethnolinguistic group in the past, plays a central role in the management of sorghum landraces and continues to underpin the resilience of their traditional seed system.

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• Danielsen, Dag Inge & Birkeland, Siri (2021). Hun avdekker arktiske planters frosne hemmeligheter. Titan.uio.no.
• Birkeland, Siri; Slotte, Tanja; Brochmann, Christian; Brysting, Anne Krag; Gustafsson, Lovisa & Nowak, Michael D (2021). What can the cold-induced transcriptomes of Arctic Brassicaceae tell us about the evolution of cold tolerance?
• Danielsen, Dag Inge & Birkeland, Siri (2021). Hvordan klarer plantene seg i ekstrem kulde i Arktis? Forskning.no. ISSN 1891-635X.
• Birkeland, Siri; Gustafsson, A Lovisa S; Brysting, Anne Krag; Brochmann, Christian & Nowak, Michael (2019). Same destination, but different roads? Overarching, but limited fine-scale molecular convergence in Arctic crucifers.
• Nowak, Michael; Gustafsson, A Lovisa S; Birkeland, Siri; Gizaw, Abel ; Rieseberg, Loren & Slotte, Tanja [Vis alle 7 forfattere av denne artikkelen] (2018). Has historical introgression impacted the evolution of hybrid incompatibilities between populations of the Arctic plant Draba nivalis (Brassicaceae)? .
• Gustafsson, A Lovisa S; Gizaw, Abel ; Birkeland, Siri; Nowak, Michael; Gelete, Desalegn Chala & Slotte, Tanja [Vis alle 8 forfattere av denne artikkelen] (2018). Evolution of postzygotic reproductive isolation in Arctic and Mediterranean plants.
• Birkeland, Siri (2018). Hvordan har tre ulike plantearter tilpasset seg et liv i Arktis? Forskning.no. ISSN 1891-635X.
• Birkeland, Siri; Gustafsson, A Lovisa S; Brysting, Anne Krag; Brochmann, Christian & Nowak, Michael (2018). Testing for convergent signatures of selection in Arctic plants.
• Struck, Torsten H; Feder, Jeffrey L.; Bendiksby, Mika; Birkeland, Siri; Cerca De Oliveira, Josè & Gusarov, Vladimir [Vis alle 13 forfattere av denne artikkelen] (2018). Cryptic Species – More Than Terminological Chaos: A Reply to Heethoff. Trends in Ecology & Evolution. ISSN 0169-5347. 33(5), s. 310–312. doi: 10.1016/j.tree.2018.02.008.
• Nowak, Michael; Gustafsson, A Lovisa S; Seid, Abel Gizaw; Birkeland, Siri; Rieseberg, Loren & Slotte, Tanja [Vis alle 7 forfattere av denne artikkelen] (2017). SpArc: Searching for genetic mechanisms of plant speciation in the Arctic.
• Birkeland, Siri (2017). Lab-prosjekt for biologiklasse basert på SpArc (pollensterilitet hos Draba nivalis-hybrider).
• Birkeland, Siri (2017). Hvordan jobber man som en forsker? SpArc-prosjektet som eksempel.
• Birkeland, Siri; Gustafsson, A Lovisa S; Slotte, Tanja; Brysting, Anne Krag; Brochmann, Christian & Nowak, Michael (2017). Testing for convergent molecular evolution in Arctic plants.
• Støstad, Hanna Nyborg; Birkeland, Siri; Delsett, Lene Liebe & Rosing-Schow, Nanna (2017). Fire råd til deg som vil knuse glasstaket. Aftenposten (morgenutg. : trykt utg.). ISSN 0804-3116.
• Grønbech, Marit Elisabeth; Bjureke, Kristina; Bøckman, Petter; Hansen, Bitten Bolvig; Wollan, Anders Kvalvåg & Rui, Siri [Vis alle 8 forfattere av denne artikkelen] (2017). Fugleaktiviteter for barn og voksne i vinterferien.
• Gustafsson, A Lovisa S; Birkeland, Siri; Gizaw, Abel ; Rieseberg, LH; Slotte, Tanja & Nowak, Michael [Vis alle 7 forfattere av denne artikkelen] (2017). Searching for genetic mechanisms of plant speciation in the Arctic.
• Cerca de Oliveira, José; Birkeland, Siri; Magnussen, Trude & Kistenich, Sonja Daniela (2017). Forskere krangler om kryptiske arter. Forskning.no. ISSN 1891-635X.
• Birkeland, Siri (2016). Hvordan jobber man som en forsker? SpArc-prosjektet som eksempel.
• Birkeland, Siri; Gustafsson, A Lovisa S; Brysting, Anne Krag; Slotte, Tanja; Brochmann, Christian & Nowak, Michael (2016). Testing for convergent evolution of cold tolerance in Arctic plants.
• Brysting, Anne Krag; Birkeland, Siri & Kaur Khalsa, Siri-Dharma (2012). Eksotiske frukter.

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