The effect of dispersal area on the extinction threshold
Abstrak
The survival of populations hinges on their ability to offset local extinctions through new colonizations. The dispersal area ($A$) plays a crucial role in this process, as it determines the probability of finding colonizable vacant sites. We investigated the spatial colonization-extinction dynamics in a lattice model (a contact process), exploring various finite dispersal areas and estimating the extinction threshold $λ_E(A)$. Our results revealed a consistent $λ_E(A)$ relationship, largely independent of lattice geometry (except for the smallest $A$). This $λ_E(A)$ relationship obeyed universal scaling laws within two broad ranges of $A$. The scaling relations suggest considerable selection upon the increase of dispersal area, particularly at low $A$ values. We discuss these findings in the broader context of the evolution of dispersal area.
Topik & Kata Kunci
Penulis (3)
Róbert Juhász
Igor D. Kovács
Beáta Oborny
Akses Cepat
- Tahun Terbit
- 2025
- Bahasa
- en
- Sumber Database
- arXiv
- Akses
- Open Access ✓