10.5061/DRYAD.FG818
Krueger-Hadfield, Stacy A.
College of Charleston
Kollars, Nicole M.
College of Charleston
Byers, James E.
University of Georgia
Greig, Thomas W.
College of Charleston
Hammann, Mareike
GEOMAR Helmholtz Centre for Ocean Research Kiel
Murray, David C.
College of Charleston
Murren, Courtney J.
College of Charleston
Strand, Allan E.
College of Charleston
Terada, Ryuta
Kagoshima University
Weinberger, Florian
GEOMAR Helmholtz Centre for Ocean Research Kiel
Sotka, Erik E.
College of Charleston
Data from: Invasion of novel habitats uncouples haplo-diplontic life cycles
Dryad
dataset
2016
Gracilaria vermiculophylla
life cycle
haploid-diploid
Baker's Law
uniparental reproduction
2016-06-09T05:34:56Z
2016-06-09T05:34:56Z
en
https://doi.org/10.1111/mec.13718
190402 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Baker's Law predicts uniparental reproduction will facilitate
colonization success in novel habitats. While evidence supports this
prediction among colonizing plants and animals, few studies have
investigated shifts in reproductive mode in haplo-diplontic species in
which both prolonged haploid and diploid stages separate meiosis and
fertilization in time and space. Due to this separation, asexual
reproduction can yield the dominance of one of the ploidy stages in
colonizing populations. We tested for shifts in ploidy and reproductive
mode across native and introduced populations of the red seaweed
Gracilaria vermiculophylla. Native populations in the northwest Pacific
Ocean were nearly always attached by holdfasts to hard substrata and, as
is characteristic of the genus, haploid–diploid ratios were slightly
diploid-biased. In contrast, along North American and European coastlines,
introduced populations nearly always floated atop soft-sediment mudflats
and were overwhelmingly dominated by diploid thalli without holdfasts.
Introduced populations exhibited population genetic signals consistent
with extensive vegetative fragmentation, while native populations did not.
Thus, the ecological shift from attached to unattached thalli, ostensibly
necessitated by the invasion of soft-sediment habitats, correlated with
shifts from sexual to asexual reproduction and slight to strong diploid
bias. We extend Baker's Law by predicting other colonizing
haplo-diplontic species will show similar increases in asexuality that
correlate with the dominance of one ploidy stage. Labile mating systems
likely facilitate colonization success and subsequent range expansion, but
for haplo-diplontic species, the long-term eco-evolutionary impacts will
depend on which ploidy stage is lost and the degree to which asexual
reproduction is canalized.
Gver microsatellite genotypesMicrosatellite genotypes for all
thalliDRYAD_Data.csv
South Korea
China
Japan
Europe
North America