TY - JOUR

T1 - Molecular biogeography of the fungus-dwelling saproxylic beetle Bolitophagus reticulatus indicates rapid expansion from glacial refugia

AU - Eberle, Jonas

AU - Husemann, Martin

AU - Doerfler, Inken

AU - Ulrich, Werner

AU - Müller, Jörg

AU - Bouget, Christophe

AU - Brin, Antoine

AU - Gossner, Martin M.

AU - Heilmann-Clausen, Jacob

AU - Isacsson, Gunnar

AU - Krištín, Anton

AU - Lachat, Thibault

AU - Larrieu, Laurent

AU - Rigling, Andreas

AU - Schmidl, Jürgen

AU - Seibold, Sebastian

AU - Vandekerkhove, Kris

AU - Habel, Jan Christian

PY - 2021

Y1 - 2021

N2 - The geographical distributions of species associated with European temperate broadleaf forests have been significantly influenced by glacial-interglacial cycles. During glacial periods, these species persisted in Mediterranean and extra-Mediterranean refugia and later, during interglacial periods, expanded northwards. The widespread saproxylic beetle Bolitophagus reticulatus depends closely on European temperate broadleaf forests. It usually develops in the tinder fungus Fomes fomentarius, a major decomposer of broadleaf-wood. We sampled B. reticulatus in sporocarps from European beech (Fagus sylvatica) and Oriental beech (Fagus orientalis) across Europe and the Caucasus region. We analysed mitochondrial gene sequences (cox1, cox2, cob) and 17 microsatellites to reconstruct the geographical distribution of glacial refugia and postglacial recolonization pathways. We found only marginal genetic differentiation of B. reticulatus, except for a significant split between populations of the Caucasus region and Europe. This indicates the existence of past refugia south of the Great Caucasus, and a contact zone with European populations in the Crimean region. Further potential refugia might have been located at the foothills of the Pyrenees and in the Balkan region. Our genetic data suggest a phalanx-wise recolonization of Europe, a reflection of the high mobility of B. reticulatus.

AB - The geographical distributions of species associated with European temperate broadleaf forests have been significantly influenced by glacial-interglacial cycles. During glacial periods, these species persisted in Mediterranean and extra-Mediterranean refugia and later, during interglacial periods, expanded northwards. The widespread saproxylic beetle Bolitophagus reticulatus depends closely on European temperate broadleaf forests. It usually develops in the tinder fungus Fomes fomentarius, a major decomposer of broadleaf-wood. We sampled B. reticulatus in sporocarps from European beech (Fagus sylvatica) and Oriental beech (Fagus orientalis) across Europe and the Caucasus region. We analysed mitochondrial gene sequences (cox1, cox2, cob) and 17 microsatellites to reconstruct the geographical distribution of glacial refugia and postglacial recolonization pathways. We found only marginal genetic differentiation of B. reticulatus, except for a significant split between populations of the Caucasus region and Europe. This indicates the existence of past refugia south of the Great Caucasus, and a contact zone with European populations in the Crimean region. Further potential refugia might have been located at the foothills of the Pyrenees and in the Balkan region. Our genetic data suggest a phalanx-wise recolonization of Europe, a reflection of the high mobility of B. reticulatus.

KW - biogeography

KW - broadleaf forest

KW - expansion

KW - Fomes fomentarius

KW - genetic analysis

KW - mobility

KW - phalanx-wise

KW - refugia

U2 - 10.1093/biolinnean/blab037

DO - 10.1093/biolinnean/blab037

M3 - Journal article

AN - SCOPUS:85109457753

VL - 133

SP - 766

EP - 778

JO - Proceedings of the Linnean Society of London

JF - Proceedings of the Linnean Society of London

SN - 0024-4066

IS - 3

ER -