4 papers
Heavy-Tailed Dispersal Kernels from Stopped Subdiffusive Fractional Brownian Motion
Luis F. Gordillo, Priscilla E. Greenwood
Subdiffusive fractional Brownian motions produce localized aggregation when particles are stopped at exponentially distributed times. In applications where clumping and long-distan…
Intermittent precipitation and spatial Allee effects drive irregular vegetation patterns in semiarid ecosystems
Ãlex Giménez-Romero, Bernard A. Afful, Priscilla E. Greenwood +2
Vegetation in semi-arid ecosystems frequently organizes into spatially heterogeneous mosaics that regulate ecosystem functioning, productivity, and resilience. These patterns arise…
Designing a Resilient Allee-Ornstein-Uhlenbeck model
Luis F. Gordillo, Priscilla E. Greenwood
In stochastic population dynamics, stochastic wandering can produce transition to an absorbing state. In particular, under Allee effects, low densities amplify the possibility of p…
Parameter variability can produce heavy tails in a model for the spatial distribution of settling organisms
Luis F. Gordillo, Priscilla E. Greenwood
We show that a simple mechanistic model of spatial dispersal for settling organisms, subject to parameter variability, can generate heavy-tailed radial probability density function…