A1 Journal article (refereed)
Seasonal genetic variation associated with population dynamics of a poecilogonous polychaete worm (2017)

Thonig, A., Banta, G. T., Hansen, B. W., & Knott, E. (2017). Seasonal genetic variation associated with population dynamics of a poecilogonous polychaete worm. Ecology and Evolution, 7 (23), 10005-10017. doi:10.1002/ece3.3518

JYU authors or editors

Publication details

All authors or editors: Thonig, Anne; Banta, Gary Thomas; Hansen, Benni Winding; Knott, Emily

Journal or series: Ecology and Evolution

ISSN: 2045-7758

eISSN: 2045-7758

Publication year: 2017

Volume: 7

Issue number: 23

Pages range: 10005-10017

Publisher: John Wiley & Sons Ltd

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1002/ece3.3518

Research data link: http://dx.doi.org/10.5061/dryad.9c5s0

Open Access: Publication published in an open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/56288

Additional information: Genotype and phenotype data for Pygospio elegans analyzed in this study are available from the Dryad Digital Repository.


Poecilogonous species show variation in developmental mode, with larvae that differ both morphologically and ecologically. The spionid polychaete Pygospio elegans shows variation in developmental mode not only between populations, but also seasonally within populations. We investigated the consequences of this developmental polymorphism on the spatial and seasonal genetic structure of P. elegans at four sites in the Danish Isefjord‐Roskilde‐Fjord estuary at six time points, from March 2014 until February 2015. We found genetic differentiation between our sampling sites as well as seasonal differentiation at two of the sites. The seasonal genetic shift correlated with the appearance of new size cohorts in the populations. Additionally, we found that the genetic composition of reproductive individuals did not always reflect the genetic composition of the entire sample, indicating that variance in reproductive success among individuals is a likely explanation for the patterns of chaotic genetic patchiness observed during this and previous studies. The heterogeneous, unpredictable character of the estuary might maintain poecilogony in P. elegans as a bet‐hedging strategy in the Isefjord‐Roskilde‐Fjord complex in comparison with other sites where P. elegans are expected to be fixed to a certain mode of development.

Keywords: genetic variation

Free keywords: bet-hedging; chaotic genetic patchiness; developmental mode; poecilogony; Pygospio elegans

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Ministry reporting: Yes

Reporting Year: 2017

JUFO rating: 1

Last updated on 2020-17-10 at 23:45