Universität zu Köln

Haileselasie, Tsegazeabe H., Mergeay, Joachim ORCID: 0000-0002-6504-0551, Weider, Lawrence J., Sommaruga, Ruben ORCID: 0000-0002-1055-2461, Davidson, Thomas A., Meerhoff, Mariana, Arndt, Hartmut ORCID: 0000-0003-2811-3595, Juergens, Klaus, Jeppesen, Erik and De Meester, Luc ORCID: 0000-0001-5433-6843 (2016). Environment not dispersal limitation drives clonal composition of Arctic Daphnia in a recently deglaciated area. Mol. Ecol., 25 (23). S. 5830 - 5843. HOBOKEN: WILEY. ISSN 1365-294X

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Abstract

One of the most prominent manifestations of the ongoing climate warming is the retreat of glaciers and ice sheets around the world. Retreating glaciers result in the formation of new ponds and lakes, which are available for colonization. The gradual appearance of these new habitat patches allows us to determine to what extent the composition of asexual Daphnia (water flea) populations is affected by environmental drivers vs. dispersal limitation. Here, we used a landscape genetics approach to assess the processes structuring the clonal composition of species in the D. pulex species complex that have colonized periglacial habitats created by ice-sheet retreat in western Greenland. We analysed 61 populations from a young (< 50 years) and an old cluster (> 150 years) of lakes and ponds. We identified 42 asexual clones that varied widely in spatial distribution. Beta-diversity was higher among older than among younger systems. Lineage sorting by the environment explained 14% of the variation in clonal composition whereas the pure effect of geographical distance was very small and statistically insignificant (R-adj(2) = 0.010, P = 0.085). Dispersal limitation did not seem important, even among young habitat patches. The observation of several tens of clones colonizing the area combined with environmentally driven clonal composition of populations illustrates that population assembly of asexual species in the Arctic is structured by environmental gradients reflecting differences in the ecology of clones.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Haileselasie, Tsegazeabe H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mergeay, Joachim UNSPECIFIED orcid.org/0000-0002-6504-0551 UNSPECIFIED Weider, Lawrence J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sommaruga, Ruben UNSPECIFIED orcid.org/0000-0002-1055-2461 UNSPECIFIED Davidson, Thomas A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Meerhoff, Mariana UNSPECIFIED UNSPECIFIED UNSPECIFIED Arndt, Hartmut UNSPECIFIED orcid.org/0000-0003-2811-3595 UNSPECIFIED Juergens, Klaus UNSPECIFIED UNSPECIFIED UNSPECIFIED Jeppesen, Erik UNSPECIFIED UNSPECIFIED UNSPECIFIED De Meester, Luc UNSPECIFIED orcid.org/0000-0001-5433-6843 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-254389
DOI:	10.1111/mec.13843
Journal or Publication Title:	Mol. Ecol.
Volume:	25
Number:	23
Page Range:	S. 5830 - 5843
Date:	2016
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1365-294X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language JAKOBSHAVN ISBRAE; WEST GREENLAND; LIFE-HISTORY; GENE FLOW; DIVERSITY; DISTANCE; PULEX; PREDATION; GLACIER; DIFFERENTIATION Multiple languages Biochemistry & Molecular Biology; Ecology; Evolutionary Biology Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/25438