Ægir Thór Thórsson

Species integrity and ploidy stability despite extensive gene flow via introgressive hybridization: the case of Betula species in Iceland

Guillaume Leduc, Ægir Thór Thórsson, Kesara Anamthawat-Jónsson

BACKGROUND: Introgressive hybridization is common in natural birch woodlands in Iceland, where two birch (Betula) species (diploid dwarf birch B. nana and tetraploid tree birch B. pubescens) coexist and hybridize readily. Our previous morphological, cytogenetic and palynological studies show that triploid hybrids …

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Species integrity and ploidy stability despite extensive gene flow via introgressive hybridization: The case of Betula species in Iceland

Benjamin Leduc, Ægir Thór Thórsson, Kesara Anamthawat‐Jónsson

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Microscopical palynology: Birch woodland expansion and species hybridisation coincide with periods of climate warming during the Holocene epoch in Iceland

Kesara Anamthawat‐Jónsson, Lilja Karlsdóttir, Ægir Thór Thórsson, Margrét Hallsdóttir

Introgressive hybridisation between arctic dwarf birch (Betula nana) and European downy birch (B. pubescens) is relatively common in natural woodlands in Iceland. As dwarf birch is a diploid species and downy tree birch a tetraploid species, their hybrids are triploid. In the …

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Community and Conservation

Megan Hicks, Árni Einarsson, Kesara Anamthawat‐Jónsson, Ágústa Edwald et autres

n recent decades, sustainability research and historical ecology research have made the incorporation of local and traditional ecological knowledge (LTK) a priority for the purpose of understanding recent environmental change and achieving long-term perspectives on local resource interactions. This chapter brings together …