Artículos de revistas
Eco-evolutionary significance of loners
Fecha
2020-01-01Registro en:
PLoS Biology, v. 18, n. 3, 2020.
1545-7885
1544-9173
10.1371/journal.pbio.3000642
2-s2.0-85082065479
Autor
Princeton University
Universidade Estadual Paulista (Unesp)
Boston University
Institut Pasteur
Institución
Resumen
Loners - individuals out of sync with a coordinated majority - occur frequently in nature. Are loners incidental byproducts of large-scale coordination attempts, or are they part of a mosaic of life-history strategies? Here, we provide empirical evidence of naturally occurring heritable variation in loner behavior in the model social amoeba Dictyostelium discoideum. We propose that Dictyostelium loners - cells that do not join the multicellular life stage - arise from a dynamic population-partitioning process, the result of each cell making a stochastic, signal-based decision. We find evidence that this imperfectly synchronized multicellular development is affected by both abiotic (environmental porosity) and biotic (signaling) factors. Finally, we predict theoretically that when a pair of strains differing in their partitioning behavior coaggregate, cross-signaling impacts slime-mold diversity across spatiotemporal scales. Our findings suggest that loners could be critical to understanding collective and social behaviors, multicellular development, and ecological dynamics in D. discoideum. More broadly, across taxa, imperfect coordination of collective behaviors might be adaptive by enabling diversification of life-history strategies.