Seasonal genetic variation associated with population dynamics of a poecilogonous polychaete worm.

Anne Thonig, Gary Thomas Banta, Benni Winding Hansen, K Emily Knott

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

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.
OriginalsprogEngelsk
TidsskriftEcology and Evolution
Vol/bind7
Udgave nummer23
Sider (fra-til)10005–10017
Antal sider12
ISSN2045-7758
DOI
StatusUdgivet - 2017

Citer dette

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title = "Seasonal genetic variation associated with population dynamics of a poecilogonous polychaete worm.",
abstract = "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.",
author = "Anne Thonig and Banta, {Gary Thomas} and Hansen, {Benni Winding} and Knott, {K Emily}",
year = "2017",
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journal = "Ecology and Evolution",
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Seasonal genetic variation associated with population dynamics of a poecilogonous polychaete worm. / Thonig, Anne; Banta, Gary Thomas; Hansen, Benni Winding; Knott, K Emily.

I: Ecology and Evolution, Bind 7, Nr. 23, 2017, s. 10005–10017.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Seasonal genetic variation associated with population dynamics of a poecilogonous polychaete worm.

AU - Thonig, Anne

AU - Banta, Gary Thomas

AU - Hansen, Benni Winding

AU - Knott, K Emily

PY - 2017

Y1 - 2017

N2 - 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.

AB - 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.

U2 - 10.1002/ece3.3518

DO - 10.1002/ece3.3518

M3 - Journal article

VL - 7

SP - 10005

EP - 10017

JO - Ecology and Evolution

JF - Ecology and Evolution

SN - 2045-7758

IS - 23

ER -