Shifting resource limitation explains multiphasic patterns of density dependence
Letten, A. D.; Orr, J. A.; Engelstaedter, J.; Held, N. A.; Klausmeier, C. A.; Manhart, M.; Stouffer, D. B.
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Several recent studies have presented sublinear density dependence as a universal phenomenon across species, driven by factors unrelated to resource limitation (e.g. predation or non-resource based inhibition). Through a combination of bacterial growth experiments and mathematical modelling, we instead show that regimes of sublinear density dependence readily emerge under sequential shifts in resource limitation, without the need to invoke other processes. We nevertheless predict that superlinear density dependence, driven by standard resource limitation, will still predominate at both high and low densities.
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