10.5061/DRYAD.H18931ZJJ
Cousens, Roger
0000-0003-2192-0183
University of Melbourne
Shaw, Elliot
University of Melbourne
Fowler, Rachael
University of Melbourne
Ohadi, Sara
University of California, Davis
Bayly, Michael
University of Melbourne
Barrett, Rosemary
University of Melbourne
Tibbits, Josquin
AgriBio
Strand, Allan
College of Charleston
Willis, Charles
University of Minnesota
Donohue, Kathleen
Duke University
Robeck, Philipp
University of Melbourne
Explaining the worldwide distributions of two highly mobile species:
Cakile edentula and C. maritima
Dryad
dataset
2020
Chloroplast
invasive plants
Australian Research Council
https://ror.org/05mmh0f86
DP140100608
2022-05-17T00:00:00Z
2021-05-17T00:00:00Z
en
https://doi.org/10.1111/jbi.14024
2422060 bytes
4
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Aim: If we are able to determine the geographic origin of an invasion, as
well as its known area of introduction, we can better appreciate the
innate environmental tolerance of a species and the strength of selection
for adaptation that colonising populations have undergone. It also enables
us to maximise the success of searches for effective biological control
agents. We determined the number of successful colonisation events that
have occurred throughout the world for two Cakile species and compared the
climates from which they originated, in which they established and then
spread. Location: Worldwide Taxon: Sea-Rockets (Cakile spp.), Brassicaceae
Methods: We used a high throughput sequencing and a genome skimming
approach combined with Bayesian Inference phylogenetics to examine
variation in entire chloroplast genomes and regions of nuclear ribosomal
DNA within native and introduced areas. Databases were used to compare
climates between native ranges and introduced regions for multiple clades
within each species. Results: At least seven clades have invaded different
regions of the world. In most cases we were able to identify their source
regions and climates. The environmental bottlenecks differed in intensity:
while some clades colonized into climates that were similar to climates in
their native range, other clades had a very broad innate environmental
tolerance such that new invasions succeeded beyond the climate range of
native populations. We found clear evidence of hybridisation –
specifically chloroplast capture - between two species in Australia.
Conclusions: Results here show that these species are sometimes capable of
colonizing in climates that are beyond the climate range of native
populations. Whether successful colonization beyond native climate niches
requires de novo adaptation, or whether it represents an innate broad
fundamental niche requires further investigation. Cakile species provide
an excellent opportunity to study replicated climate adaptation
trajectories.
The data set comprises collected occurrence data from different sources
included in the SI Table 1 and GBIF data for the native range of the two
species. The first records of introduction into a region were taken from
the earliest sample in GBIF or from published reports. 27,343 and 2,081
native range records were extracted from GBIF for C. maritima and C.
edentula, respectively.
Subsetting the data allows you to obtain occurrences of species and clades
in their respective ranges. Empty fields present missing values.