Supplementary material from "The role of sea ice for vascular plant dispersal in the Arctic"
Posted on 2016-09-13 - 07:41
Sea ice has been suggested to be an important factor for dispersal of vascular plants in the Arctic. To assess its role for postglacial colonisation in the North Atlantic region, we compiled data on the first Late Glacial to Holocene occurrence of vascular plant species in East Greenland, Iceland, the Faroe Islands and Svalbard. For each record, we reconstructed likely past dispersal events using data on species distributions and genetics. We compared these data to sea-ice reconstructions to evaluate the potential role of sea ice in these past colonisation events and finally evaluated these results using a compilation of driftwood records as an independent source of evidence that sea ice can disperse biological material. Our results show that sea ice was in general more prevalent along the most likely dispersal routes at times of assumed first colonisation than along other possible routes. Also, driftwood is frequently dispersed in regions that have sea ice today. Thus, sea ice may act as an important dispersal agent. Melting sea ice may hamper future dispersal of Arctic plants and thereby cause more genetic differentiation. It may also limit the northwards expansion of competing boreal species, and hence favour the persistence of Arctic species.
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Alsos, Inger Greve; Ehrich, Dorothee; Seidenkrantz, Marit-Solveig; Bennike, Ole; Kirchhefer, Andreas Joachim; Geirsdottir, Aslaug (2016). Supplementary material from "The role of sea ice for vascular plant dispersal in the Arctic". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.3464547.v1
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AUTHORS (6)
IA
Inger Greve Alsos
DE
Dorothee Ehrich
MS
Marit-Solveig Seidenkrantz
OB
Ole Bennike
AK
Andreas Joachim Kirchhefer
AG
Aslaug Geirsdottir