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Ecology of cryptic invasions: latitudinal segregation among Watersipora (Bryozoa) species
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Ecology of cryptic invasions: latitudinal segregation among Watersipora (Bryozoa) species
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Journal Article
Ecology of cryptic invasions: latitudinal segregation among Watersipora (Bryozoa) species
2012
Overview
Watersipora
is an invasive genus of bryozoans, easily dispersed by fouled vessels. We examined Cytochrome c oxidase subunit I haplotypes from introduced populations on the US Pacific coastline to investigate geographic segregation of species and/or haplotypes. In California, the
W. subtorquata
group fell into three major sub-groups:
W. subtorquata
clades A and B and
W
. “
new sp
.”.
W. subtorquata
clades A and B were common in southern California south of Point Conception, a recognized biogeographic boundary, whereas further north,
W. subtorquata
clade A and
W
.
n
. sp. were frequent. The southern California region also had colonies of a morphologically distinct species,
W. arcuata
, also found in southern Australia and Hawaii; COI variation indicates a common ancestral source(s) in these introductions. The distribution of
Watersipora
-complex lineages on different coastlines is shown to be temperature correlated. Accordingly, pre-exisitng temperature-based adaptations may play a key role in determining invasion patterns.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
