Oceans host communities of plankton composed of a huge number of rare species that, as estimated in metagenomic studies, decay as a steep power law of their abundance. We propose that the way chaotic advection of oceanic currents limit protists dispersal is a key factor of such biodiversity pattern. We introduce a spatially explicit coalescence model able to reconstruct species ancestry and diversity in the presence of currents. Our model predicts a steep power law decay of the species abundance distribution and a steep increase of the number of observed species with sample size. Indeed, we find a significant correlation of the local finite-size Lyapunov exponents of our chaotic currents and the power law exponents of the species abundance distribution. Metagenomic studies of planktonic protist communities show excellent agreement with our results.
Ponente: Paula Villa Martin. Okinawa Institute of Science and Technology, Biological Complexity Unit.
Fecha y hora: viernes, 9 de octubre de 2020 a las 12:00.
Lugar: Seminario de Física Computacional, planta baja del edificio de Física (junto a las pantallas). Facultad de Ciencias.
Este seminarios se retransmitirá por streaming en la dirección: https://laplace.ugr.es/b/seminarios-materia
Grabación
