Jo Skeie Hermansen

• Kausrud, Kyrre Linné; Vandvik, Vigdis; Flø, Daniel; Geange, Sonya Rita; Hegland, Stein Joar & Hermansen, Jo Skeie [Show all 24 contributors for this article] (2022). Impacts of climate change on the forest ecosystem. VKM Report. ISSN 2535-4019.
• Nordbotten, Jan Martin; Bokma, Folmer; Hermansen, Jo Skeie & Stenseth, Nils Christian (2020). The dynamics of trait variance in multi-species communities. Royal Society Open Science. ISSN 2054-5703. 7(8), p. 1–20. doi: 10.1098/rsos.200321. Full text in Research Archive
• Runemark, Anna; Eroukhmanoff, Fabrice; Nava-Bolaños, Angela; Hermansen, Jo Skeie & Meier, Joana I (2018). Hybridization, sex-specific genomic architecture and local adaptation. Philosophical Transactions of the Royal Society of London. Biological Sciences. ISSN 0962-8436. 373(1757), p. 1–10. doi: 10.1098/rstb.2017.0419.
• Hermansen, Jo Skeie; Starrfelt, Jostein; Voje, Kjetil L. & Stenseth, Nils Christian (2018). Macroevolutionary consequences of sexual conflict. Biology Letters. ISSN 1744-9561. 14(6), p. 1–4. doi: 10.1098/rsbl.2018.0186.
• Runemark, Anna; Trier, Cassandra Nicole; Eroukhmanoff, Fabrice; Hermansen, Jo Skeie; Matschiner, Michael & Ravinet, Mark [Show all 8 contributors for this article] (2018). Variation and constraints in hybrid genome formation. Nature Ecology and Evolution. ISSN 2397-334X. 2(3), p. 549–556. doi: 10.1038/s41559-017-0437-7.
• Sætre, Glenn-Peter; Cuevas Pulido, Angelica Maria; Hermansen, Jo Skeie; Elgvin, Tore Oldeide; Fernández, Laura Piñeiro & Sæther, Stein Are [Show all 8 contributors for this article] (2017). Rapid polygenic response to secondary contact in a hybrid species. Proceedings of the Royal Society of London. Biological Sciences. ISSN 0962-8452. 284(1853). doi: 10.1098/rspb.2017.0365. Show summary

  Secondary contact between closely related species can have genetic consequences. Competition for essential resources may lead to divergence in heritable traits that reduces interspecific competition leading to increased rate of genetic divergence. Conversely, hybridization and backcrossing can lead to genetic convergence. Here, we study a population of a hybrid species, the Italian sparrow (Passer italiae), before and after it came into secondary contact with one of its parent species, the Spanish sparrow (P. hispaniolensis), in 2013. We demonstrate strong consequences of interspecific competition: Italian sparrows were kept away from a popular feeding site by its parent species, resulting in poorer body condition and a significant drop in population size. Although no significant morphological change could be detected, after only 3 years of sympatry, the Italian sparrows had diverged significantly from the Spanish sparrows across a set of 81 protein-coding genes. These temporal genetic changes are mirrored by genetic divergence observed in older sympatric Italian sparrow populations within the same area of contact. Compared with microallopatric birds, sympatric ones are genetically more diverged from Spanish sparrows. Six significant outlier genes in the temporal and spatial comparison (i.e. showing the greatest displacement) have all been found to be associated with learning and neural development in other bird species. character displacement, interspecific competition, Passer, hybrid species, cognition, learning

• Eroukhmanoff, Fabrice; Rowe, Melissah; Cramer, Emily Rebecca A; Haas, Fredrik; Hermansen, Jo Skeie & Runemark, Anna [Show all 8 contributors for this article] (2016). Experimental evidence for ovarian hypofunction in sparrow hybrids. Avian Research. ISSN 2053-7166. 7. doi: 10.1186/s40657-016-0038-1.
• Hermansen, Jo Skeie; Haas, Fredrik; Trier, Cassandra Nicole; Bailey, Richard Ian; Nederbragt, Alexander Johan & Marzal, Alfonso [Show all 7 contributors for this article] (2014). Hybrid speciation through sorting of parental incompatibilities in Italian sparrows. Molecular Ecology. ISSN 0962-1083. 23(23), p. 5831–5842. doi: 10.1111/mec.12910.
• Eroukhmanoff, Fabrice; Elgvin, Tore Oldeide; Gonzales Rojas, Maria Fernanda; Haas, Fredrik; Hermansen, Jo Skeie & Sætre, Glenn-Peter (2014). Effect of Species Interaction on Beak Integration in an Avian Hybrid Species Complex. Evolutionary Biology. ISSN 0071-3260. 41(3), p. 452–458. doi: 10.1007/s11692-014-9278-3.
• Cramer, Emily Rebecca A; Laskemoen, Terje; Eroukhmanoff, Fabrice; Haas, Fredrik; Hermansen, Jo Skeie & Lifjeld, Jan Terje [Show all 9 contributors for this article] (2014). Testing a post-copulatory pre-zygotic reproductive barrier in a passerine species pair. Behavioral Ecology and Sociobiology. ISSN 0340-5443. 68(7), p. 1133–1144. doi: 10.1007/s00265-014-1724-9.
• Trier, Cassandra Nicole; Hermansen, Jo Skeie; Sætre, Glenn-Peter & Bailey, Richard Ian (2014). Evidence for Mito-Nuclear and Sex-Linked Reproductive Barriers between the Hybrid Italian Sparrow and Its Parent Species. PLoS Genetics. ISSN 1553-7390. 10(1). doi: 10.1371/journal.pgen.1004075. Full text in Research Archive
• Eroukhmanoff, Fabrice; Hermansen, Jo Skeie; Bailey, Richard Ian; Sæther, Stein Are & Sætre, Glenn-Peter (2013). Local adaptation within a hybrid species. Heredity. ISSN 0018-067X. 111(4), p. 286–292. doi: 10.1038/hdy.2013.47.
• Abbott, R; Albach, D; Ansell, S; Arntzen, JW; Baird, SJE & Bierne, N [Show all 39 contributors for this article] (2013). Hybridization and speciation. Journal of Evolutionary Biology. ISSN 1010-061X. 26(2), p. 229–246. doi: 10.1111/j.1420-9101.2012.02599.x.
• Sætre, Glenn-Peter; Riyahi, Sepand; Aliabadian, M.; Hermansen, Jo Skeie; Hogner, Silje & Olsson, U. [Show all 10 contributors for this article] (2012). Single origin of human commensalism in the house sparrow. Journal of Evolutionary Biology. ISSN 1010-061X. 25(4), p. 788–796. doi: 10.1111/j.1420-9101.2012.02470.x.
• Elgvin, Tore Oldeide; Hermansen, Jo Skeie; Fijarczyk, Anna; Bonnet, Timothee; Borge, Thomas & Sæther, Stein Are [Show all 8 contributors for this article] (2011). Hybrid speciation in sparrows II: a role for sex chromosomes? Molecular Ecology. ISSN 0962-1083. 20(18), p. 3823–3837. doi: 10.1111/j.1365-294X.2011.05182.x.
• Hermansen, Jo Skeie; Sæther, Stein Are; Elgvin, Tore Oldeide; Borge, Thomas; Hjelle, Elin & Sætre, Glenn-Peter (2011). Hybrid speciation in sparrows I: phenotypic intermediacy, genetic admixture and barriers to gene flow. Molecular Ecology. ISSN 0962-1083. 20(18), p. 3812–3822. doi: 10.1111/j.1365-294X.2011.05183.x.
• Sæther, Stein Are; Hermansen, Jo Skeie; Borge, Thomas; Hjelle, Elin & Sætre, Glenn-Peter (2009). Molecular genetics of the Italian sparrow: a separate species, a variety of house sparrow or Spanish sparrow, or a hybrid? Ecologia Urbana. ISSN 1974-8388. 21(1), p. 26–27.

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• Hermansen, Jo Skeie (2016). A fruitful affair: Speciation by hybridization in Passer sparrows.
• Hermansen, Jo Skeie (2016). From sparrowling to Grim Reaper.
• Hermansen, Jo Skeie (2015). Et forskningsprosjekt.
• Hermansen, Jo Skeie (2015). The role of hybridization in evolution.
• Hermansen, Jo Skeie (2015). PhD – dos and don'ts.
• Eroukhmanoff, Fabrice; Hermansen, Jo Skeie; Elgvin, Tore Oldeide; Sæther, Stein Are & Sætre, Glenn-Peter (2014). Genome wide signature of character displacement in a hybrid species.
• Hermansen, Jo Skeie (2014). Hybrid speciation is for the birds (and plants, reptiles, fish, and insects).
• Hermansen, Jo Skeie (2014). Origins of Sparrow Speciation. Science. ISSN 0036-8075.
• Cramer, Emily Rebecca A; Ålund, Murielle; Laskemoen, Terje; Eroukhmanoff, Fabrice; Eybert, Marie-Christine & Haas, Fredrik [Show all 12 contributors for this article] (2014). Post-copulatory, pre-zygotic isolating barriers in passerine birds?
• Hermansen, Jo Skeie (2014). Parental sympatry recapitulates processes involved in hybrid speciation.
• Cramer, Emily Rebecca A; Laskemoen, Terje; Eroukhmanoff, Fabrice; Haas, Fredrik; Hermansen, Jo Skeie & Lifjeld, Jan Terje [Show all 9 contributors for this article] (2013). Testing a post-copulatory pre-zygotic reproductive barrier in a passerine species pair.
• Cramer, Emily Rebecca A; Laskemoen, Terje; Eroukhmanoff, Fabrice; Haas, Fredrik; Hermansen, Jo Skeie & Lifjeld, Jan Terje [Show all 9 contributors for this article] (2013). An experimental test of a potential post-copulatory pre-zygotic reproductive barrier in a passerine species pair.
• Hermansen, Jo Skeie (2013). Reproductive barriers in a hybrid species system.
• Hermansen, Jo Skeie (2012). Hybrid speciation in sparrows.
• Hermansen, Jo Skeie (2012). Reproductive barriers in a hybrid species system.
• Hermansen, Jo Skeie; Elgvin, Tore Oldeide; Sæther, Stein Are; Borge, Thomas; Hjelle, Elin & Sætre, Glenn-Peter (2010). Hybrid speciation in sparrows.
• Hermansen, Jo Skeie; Sæther, Stein Are; Borge, Thomas; Hjelle, Elin; Elgvin, Tore Oldeide & Sætre, Glenn-Peter (2009). Is the Italian sparrow a result of hybrid speciation?

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