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Postel, Ute, Glemser, Barbara, Salazar Alekseyeva, Katherine, Eggers, Sarah Lena, Groth, Marco, Glöckner, Gernot, John, Uwe, Mock, Thomas 
ORCID: https://orcid.org/0000-0001-9604-0362, Klemm, Kerstin, Valentin, Klaus and Beszteri, Bánk
(2020)
Adaptive divergence across Southern Ocean gradients in the pelagic diatom Fragilariopsis kerguelensis.
Molecular Ecology, 29 (24).
pp. 4913-4924.
ISSN 0962-1083
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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 diatom Fragilariopsis 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: | Article |
|---|---|
| Uncontrolled Keywords: | southern ocean,adaptive divergence,diatom,pelagic,population structure,speciation,ecology, evolution, behavior and systematics,genetics,sdg 14 - life below water ,/dk/atira/pure/subjectarea/asjc/1100/1105 |
| Faculty \ School: | Faculty of Science > School of Environmental Sciences |
| UEA Research Groups: | Faculty of Science > Research Groups > Environmental Biology Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences Faculty of Science > Research Centres > Centre for Ecology, Evolution and Conservation |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 13 Aug 2020 23:59 |
| Last Modified: | 26 Jun 2024 11:32 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/76442 |
| DOI: | 10.1111/mec.15554 |
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