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• W4312082639 abstract "Neutral models in ecology assume that all species are demographically equivalent, such that their abundances differ ultimately because of demographic stochasticity rather than selection. In spite of their simplicity, neutral models have been found to accurately reproduce static patterns of biodiversity for diverse communities. However, the same neutral models have been found to exhibit species abundance dynamics that are far too slow compared to reality, resulting in poor fits to temporally dynamic patterns of biodiversity. Here, we show that one of the root causes of these slow dynamics is the additional assumption that a community has reached an equilibrium with a fixed community size, with species that have a net growth rate close to zero. We removed this additional assumption by constructing and analyzing a neutral model with an expected community size that can change over time and is not necessarily at equilibrium, which thus allows the historical formation of a community to be represented explicitly. Our analysis demonstrated that for the general scenario where a small community rapidly grows in size to a carrying capacity, representing recovery from ecological disturbance or assembly of a new community, the model produced much larger changes in species abundances and much shorter species ages than a neutral model at an equilibrium with fixed community size. In addition, the species abundance distribution was biphasic with a subset of abundant species arising from a founder effect. We confirmed these new results in applications of the new model to the specific scenario of recovery of the Amazon tree community after the end-Cretaceous bolide impact, which involved periods of increasing and decreasing community size. We conclude that incorporating transient dynamics in neutral models improves realism by allowing explicit consideration of how a community is formed over realistic time-scales." @default.
• W4312082639 created "2023-01-04" @default.
• W4312082639 creator A5032740717 @default.
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• W4312082639 date "2023-02-01" @default.
• W4312082639 modified "2023-09-23" @default.
• W4312082639 title "Improving the realism of neutral ecological models by incorporating transient dynamics with temporal changes in community size" @default.
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• W4312082639 doi "https://doi.org/10.1016/j.tpb.2022.12.001" @default.
• W4312082639 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36521555" @default.
• W4312082639 hasPublicationYear "2023" @default.
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