Geir Hestmark

University of Oslo — Norway

Agricultural and Biological Sciences · Life Sciences

20h-index4.7kcitations69works0.02yr avg
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Research Topics

Lichen and fungal ecology(40), Botany and Plant Ecology Studies(20), Mycorrhizal Fungi and Plant Interactions(16), Plant Pathogens and Fungal Diseases(10), Geology and Paleoclimatology Research(9)

Publications69 total

Jens Esmarks oppdagelse av istiden i 1823
Naturen·2023
A tale of two moraines and the discovery of Ice Ages
Geological Society London Special Publications·2023· 1 citedOpen Access
(2835) Proposal to conserve the name <i>Umbilicaria spodochroa</i> (lichenized <i>Ascomycota</i>) with a conserved type and with that spelling
Taxon·2021Open Access
On the altitudes of von Humboldt
Proceedings of the National Academy of Sciences·2019· 10 citedOpen Access
Tracings of the north of Europe: Robert Chambers in search of the Ice Age
Annals of Science·2017· 1 cited
Jens Esmark's mountain glacier traverse 1823 − the key to his discovery of Ice Ages
Boreas·2017· 36 citedOpen Access
Lectotypification of <i>Umbilicaria torrefacta</i> (Lightf. ) Schrad.
The Lichenologist·2017· 1 cited
Jens Esmark's Christiania (Oslo) meteorological observations 1816–1838: the first long-term continuous temperature record from the Norwegian capital homogenized and analysed
Climate of the past·2016· 10 citedOpen Access
Response to reviews of cp-2016-60 Hestmark Nordli Esmark
2016Open Access
Photobiont associations in co-occurring umbilicate lichens with contrasting modes of reproduction in coastal Norway
The Lichenologist·2016· 15 cited
Jens Esmark's Christiania (Oslo) meteorological observations 1816–1838: The first long term continuous temperature record from the Norwegian capital homogenized and analysed
2016Open Access
The lichen genus <i>Umbilicaria</i> in Ecuador
Nordic Journal of Botany·2016· 8 cited
Appendix A. A table showing constancy percentage, C, (for species with occurrence 3.0% in the total data set consisting of 640 samples) in control plots over all years (1993–2000), in treated plots in 1993 before disturbance and in the different years after disturbance (1994–2000), within treatments over all years after disturbance, species optima for the three first axes in a DCA ordination, and in the propagule bank of the treated plots before treatment in 1993.
Figshare·2016Open Access
Lectotypification of <i>Umbilicaria virginis</i> (<i>Umbilicariaceae</i>)
The Lichenologist·2015· 2 cited
The Oslo temperature series 1837-2012: homogeneity testing and temperature analysis
International Journal of Climatology·2014· 10 cited
Lectotypification of the name <i>Umbilicaria nylanderiana</i> (Umbilicariaceae)
Taxon·2014· 6 cited
Tobias Krüger. <i>Discovering the Ice Ages: International Reception and Consequences for a Historical Understanding of Climate</i>. Translated by, Ann M. Hentschel. (History of Science and Medicine Library, 37.) xix + 534 pp., bibls., indexes. Leiden/Boston: Brill, 2013. $179 (cloth).
Isis·2014
A multigene phylogenetic synthesis for the class Lecanoromycetes (Ascomycota): 1307 fungi representing 1139 infrageneric taxa, 317 genera and 66 families
Molecular Phylogenetics and Evolution·2014· 280 citedOpen Access
Dan Ch. Christensen: Naturens tankelæser. En biografi om Hans Christian Ørsted
Historisk tidsskrift·2011
Single origin and subsequent diversification of central Andean endemic<i>Umbilicaria</i>species
Mycologia·2011· 25 cited
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Frequent Co-authors

Jolanta Miądlikowska(8), François Lutzoni(7), Robert Lücking(6), Conrad L. Schoch(6), Cécile Gueidan(6), Emily Fraker(6), Valérie Reeb(5), Josef Hafellner(5), A. Elizabeth Arnold(5), Christoph Scheidegger(5), Olav Skogesal(5), Øystein Skullerud(5), Valérie Hofstetter(4), Burkhard Büdel(4), Alexandra Rauhut(4), Frank Kauff(4), Joseph W. Spatafora(3), André Aptroot(3), David M. Geiser(3), Kentaro Hosaka(3)