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- W2032250648 abstract "Markov models are widely used to describe the dynamics of communities of sessile organisms, because they are easily fitted to field data and provide a rich set of analytical tools. In typical ecological applications, at any point in time, each point in space is in one of a finite set of states (e.g., species, empty space). The models aim to describe the probabilities of transitions between states. In most Markov models for communities, these transition probabilities are assumed to be independent of state abundances. This assumption is often suspected to be false and is rarely justified explicitly. Here, we start with simple assumptions about the interactions among sessile organisms and derive a model in which transition probabilities depend on the abundance of destination states. This model is formulated in continuous time and is equivalent to a Lotka-Volterra competition model. We fit this model and a variety of alternatives in which transition probabilities do not depend on state abundances to a long-term coral reef data set. The Lotka-Volterra model describes the data much better than all models we consider other than a saturated model (a model with a separate parameter for each transition at each time interval, which by definition fits the data perfectly). Our approach provides a basis for further development of stochastic models of sessile communities, and many of the methods we use are relevant to other types of community. We discuss possible extensions to spatially explicit models." @default.
- W2032250648 created "2016-06-24" @default.
- W2032250648 creator A5057105383 @default.
- W2032250648 creator A5081686489 @default.
- W2032250648 date "2008-04-01" @default.
- W2032250648 modified "2023-10-18" @default.
- W2032250648 title "LOTKA-VOLTERRA COMPETITION MODELS FOR SESSILE ORGANISMS" @default.
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- W2032250648 doi "https://doi.org/10.1890/07-0941.1" @default.
- W2032250648 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18481537" @default.
- W2032250648 hasPublicationYear "2008" @default.
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