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Human-mediated introduction of geoengineering earthworms in the Fennoscandian arctic
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.ORCID iD: 0000-0001-8814-0013
2018 (English)In: Biological Invasions, ISSN 1387-3547, E-ISSN 1573-1464, Vol. 20, no 6, p. 1377-1386Article in journal (Refereed) Published
Abstract [en]

It is now well established that European earthworms are re-shaping formerly glaciated forests in North America with dramatic ecological consequences. However, few have considered the potential invasiveness of this species assemblage in the European arctic. Here we argue that some earthworm species (Lumbricus rubellus, Lumbricus terrestris and Aporrectodea sp.) with great geomorphological impact (geoengineering species) are non-native and invasive in the Fennoscandian arctic birch forests, where they have been introduced by agrarian settlers and most recently through recreational fishing and gardening. Our exploratory surveys indicate no obvious historical dispersal mechanism that can explain early arrival of these earthworms into the Fennoscandian arctic: that is, these species do not appear to establish naturally along coastlines mimicking conditions following deglaciation in Fennoscandia, nor were they spread by early native (Sami) cultures. The importance of anthropogenic sources and the invasive characteristics of L. rubellus and Aporrectodea sp. in the arctic is evident from their radiation outwards from abandoned farms and modern cabin lawns into adjacent arctic birch forests. They appear to outcompete previously established litter-dwelling earthworm species (i.e. Dendrobaena octaedra) that likely colonized the Fennoscandian landscape rapidly following deglaciation via hydrochory and/or dispersal by early Sami settlements. The high geoengineering earthworm biomasses, their recognized ecological impact in other formerly glaciated environments, and their persistence once established leads us to suggest that geoengineering earthworms may pose a potent threat to some of the most remote and protected arctic environments in northern Europe.

Place, publisher, year, edition, pages
Springer, 2018. Vol. 20, no 6, p. 1377-1386
Keywords [en]
Earthworm invasion, Arctic, Lumbricidae, Land use, Hydrochory
National Category
Ecology
Identifiers
URN: urn:nbn:se:umu:diva-148720DOI: 10.1007/s10530-017-1642-7ISI: 000432717100003Scopus ID: 2-s2.0-85037091124OAI: oai:DiVA.org:umu-148720DiVA, id: diva2:1223360
Available from: 2018-06-25 Created: 2018-06-25 Last updated: 2018-06-25Bibliographically approved

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