10.5061/DRYAD.JR5FD
Steiner, Christopher F.
Wayne State University
Stockwell, Richard D.
Wayne State University
Tadros, Monica
Wayne State University
Shaman, Laith
Wayne State University
Patel, Komal
Wayne State University
Khraizat, Laila
Wayne State University
Data from: Impacts of dispersal on rapid adaptation and dynamic stability
of Daphnia in fluctuating environments
Dryad
dataset
2016
Daphnia pulex
eco-evolutionary dynamics
metapopulation
compensatory dynamics
2016-02-18T16:46:09Z
2016-02-18T16:46:09Z
en
https://doi.org/10.1098/rspb.2015.2426
211243 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Prior ecological research has shown that spatial processes can enhance the
temporal stability of populations in fluctuating environments. Less
explored is the effect of dispersal on rapid adaptation and its
concomitant impact on population dynamics. For asexually reproducing
populations, theory predicts that dispersal in fluctuating environments
can facilitate asynchrony among clones and enhance stability by reducing
temporal variability of total population abundance. This effect is
predicted when clones exhibit heritable variation in environmental optima
and when fluctuations occur asynchronously among patches. We tested this
in the field using artificial ponds and metapopulations composed of a
diverse assemblage of Daphnia pulex clones. We directly manipulated
dispersal presence/absence and environmental fluctuations in the form of
nutrient pulses. Consistent with predictions, dispersal enhanced temporal
asynchrony among clones in the presence of nutrient pulses; this in turn
stabilized population dynamics. This effect only emerged when patches
experienced spatially asynchronous nutrient pulses (dispersal had no
effect when patches were synchronously pulsed). Clonal asynchrony was
driven by strong positive selection for a single clone that exhibited a
performance advantage under conditions of low resource availability. Our
work highlights the importance of dispersal as a driver of
eco-evolutionary dynamics and population stability in variable
environments.
Time series of clonal composition and diversityTime series of Daphnia
pulex clone frequencies, abundances, log (abundance), log growth rates,
and diversityClonal_composition_time_series.csvDaphnia pulex and
chlorophyll a time seriesTime series of Daphnia pulex population density,
log D. pulex density, chlorophyll-a concentration and log chlorophyll-a
concentrationDpulex_density_chla_time_series.csvTemporal variability and
synchrony measuresCoefficient of variation of Daphnia pulex density and
chlorophyll-a concentration over time; synchrony of D. pulex clonal
abundances over timeCV_synchrony_measures.csv