Data from: Impacts of dispersal on rapid adaptation and dynamic stability of Daphnia in fluctuating environments
| Main Authors: | Steiner, Christopher F., Stockwell, Richard D., Tadros, Monica, Shaman, Laith, Patel, Komal, Khraizat, Laila |
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| Format: | info dataset Journal |
| Terbitan: |
, 2016
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/5011650 |
Daftar Isi:
- 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