| Autor: |
Sergio Santorelli Junior, William E. Magnusson, Cláudia Pereira de Deus, Timothy H. Keitt |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Perspectives in Ecology and Conservation, Vol 20, Iss 2, Pp 151-158 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2530-0644 |
| DOI: |
10.1016/j.pecon.2021.12.004 |
| Popis: |
Amazonian rivers are only partial barriers to the dispersal of most species, but they still form the limits between the distributions of many similar species. We show that two competitively-identical species may remain allopatric for hundreds of generations when a river only reduces the chance of a species crossing it. To illustrate this, we developed a two-dimensional cellular automata for two allopatric species under neutral-theory dynamics and recorded the time required for the first extinction of a species and the frequency with which it occurred across replicate simulations. Our results indicate that neutral processes associated with reduced dispersal across rivers can maintain competitively-identical species allopatric for hundreds of generations despite repeated river crossings. These cross-river incursions were rarely successful owing to the low likelihood of a rare invader outcompeting resident populations. This process provides a plausible mechanism for the maintenance of Amazonian biodiversity and may explain the spatial-distribution limits of species caused by large rivers in the Amazon that are not absolute barriers to dispersal. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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