Universität zu Köln

Postel, Ute, Glemser, Barbara, Salazar Alekseyeva, Katherine ORCID: 0000-0002-0088-4489, Eggers, Sarah Lena ORCID: 0000-0001-6094-3201, Groth, Marco ORCID: 0000-0002-9199-8990, Gloeckner, Gernot, John, Uwe ORCID: 0000-0002-1297-4086, Mock, Thomas ORCID: 0000-0001-9604-0362, Klemm, Kerstin, Valentin, Klaus ORCID: 0000-0001-7401-9423 and Beszteri, Bank (2020). Adaptive divergence across Southern Ocean gradients in the pelagic diatomFragilariopsis kerguelensis. Mol. Ecol., 29 (24). S. 4913 - 4925. HOBOKEN: WILEY. ISSN 1365-294X

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Abstract

The Southern Ocean is characterized by longitudinal water circulations crossed by strong latitudinal gradients. How this oceanographic background shapes planktonic populations is largely unknown, despite the significance of this region for global biogeochemical cycles. Here, we show, based on genomic, morphometric, ecophysiological and mating compatibility data, an example of ecotypic differentiation and speciation within an endemic pelagic inhabitant, the diatomFragilariopsis kerguelensis. We discovered three genotypic variants, one present throughout the latitudinal transect sampled, the others restricted to the north and south, respectively. The latter two showed reciprocal monophyly across all three genomes and significant ecophysiological differences consistent with local adaptation, but produced viable offspring in laboratory crosses. The third group was also reproductively isolated from the latter two. We hypothesize that this pattern originated by an adaptive expansion accompanied by ecotypic divergence, followed by sympatric speciation.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Postel, Ute UNSPECIFIED UNSPECIFIED UNSPECIFIED Glemser, Barbara UNSPECIFIED UNSPECIFIED UNSPECIFIED Salazar Alekseyeva, Katherine UNSPECIFIED orcid.org/0000-0002-0088-4489 UNSPECIFIED Eggers, Sarah Lena UNSPECIFIED orcid.org/0000-0001-6094-3201 UNSPECIFIED Groth, Marco UNSPECIFIED orcid.org/0000-0002-9199-8990 UNSPECIFIED Gloeckner, Gernot UNSPECIFIED UNSPECIFIED UNSPECIFIED John, Uwe UNSPECIFIED orcid.org/0000-0002-1297-4086 UNSPECIFIED Mock, Thomas UNSPECIFIED orcid.org/0000-0001-9604-0362 UNSPECIFIED Klemm, Kerstin UNSPECIFIED UNSPECIFIED UNSPECIFIED Valentin, Klaus UNSPECIFIED orcid.org/0000-0001-7401-9423 UNSPECIFIED Beszteri, Bank UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-325611
DOI:	10.1111/mec.15554
Journal or Publication Title:	Mol. Ecol.
Volume:	29
Number:	24
Page Range:	S. 4913 - 4925
Date:	2020
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1365-294X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DIATOM FRAGILARIOPSIS-KERGUELENSIS; MULTILOCUS GENOTYPE DATA; POPULATION-STRUCTURE; INFERENCE; SEDIMENTS; BIOGEOGRAPHY; VARIABILITY; PERFORMANCE; SEQUENCE; FRONTS Multiple languages Biochemistry & Molecular Biology; Ecology; Evolutionary Biology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/32561