10.5061/DRYAD.SH553
Perea, Silvia
Museo Nacional de Ciencias Naturales
Doadrio, Ignacio
Museo Nacional de Ciencias Naturales
Data from: Phylogeography, historical demography, and habitat suitability
modelling of freshwater fishes inhabiting seasonally fluctuating
Mediterranean river systems: a case study using the Iberian cyprinid
Squalius valentinus
Dryad
dataset
2015
2015-06-15T15:28:48Z
2015-06-15T15:28:48Z
en
https://doi.org/10.1111/mec.13274
1369341 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
The Mediterranean freshwater fish fauna has evolved under constraints
imposed by the seasonal weather/hydrological patterns that define the
Mediterranean climate. These conditions have influenced the genetic and
demographic structure of aquatic communities since their origins in the
Mid-Pliocene. Freshwater species in Mediterranean-type climates will
likely constitute genetically well-differentiated populations, to varying
extents depending on basin size, as a consequence of fragmentation
resulting from drought/flood cycles. We developed an integrative framework
to study the spatial patterns in genetic diversity, demographic trends,
habitat suitability modelling and landscape genetics, to evaluate the
evolutionary response of Mediterranean-type freshwater fish to seasonal
fluctuations in weather. To test this evolutionary response, the model
species used was Squalius valentinus, an endemic cyprinid of the Spanish
Levantine area, where seasonal weather fluctuations are extreme, although
our findings may be extrapolated to other Mediterranean-type species. Our
results underscore the significant role of the Mediterranean climate,
along with Pleistocene glaciations, in diversification of S. valentinus.
We found higher nuclear diversity in larger drainage basins, but higher
mitochondrial diversity correlated to habitat suitability rather than
basin size. We also found strong correlation between genetic structure and
climatic factors associated with Mediterranean seasonality. Demographic
and migration analyses suggested population expansion during glacial
periods that also contributed to the current genetic structure of S.
valentinus populations. The inferred models support the significant
contribution of precipitation and temperature to S. valentinus habitat
suitability and allow recognizing areas of habitat stability. We highlight
the importance of stable habitat conditions, fostered by typical karstic
springs found on the Mediterranean littoral coasts, for the preservation
of freshwater species inhabiting seasonally fluctuating river systems.
Svalentinus_alingmentsAlignments of cytochrome b and RAG 1 sequences in
fasta format. Both genes are in the same file, one after the
otherSvalentinus_alingment.fas