| Texto completo | |
| Autor(es): |
Nascimento, Joao C. S.
;
Blanco, Fernando
;
Domingo, M. Soledad
;
Cantalapiedra, Juan L.
;
Pires, Mathias M.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ECOLOGY LETTERS; v. 27, n. 6, p. 11-pg., 2024-06-01. |
| Resumo | |
Linking the species interactions occurring at the scale of local communities to their potential impact at evolutionary timescales is challenging. Here, we used the high-resolution fossil record of mammals from the Iberian Peninsula to reconstruct a timeseries of trophic networks spanning more than 20 million years and asked whether predator-prey interactions affected regional extinction patterns. We found that, despite small changes in species richness, trophic networks showed long-term trends, gradually losing interactions and becoming sparser towards the present. This restructuring of the ecological networks was driven by the loss of medium-sized herbivores, which reduced prey availability for predators. The decrease in prey availability was associated with predator longevity, such that predators with less available prey had greater extinction risk. These results not only reveal long-term trends in network structure but suggest that prey species richness in ecological communities may shape large scale patterns of extinction and persistence among predators. We used the Iberian fossil records to reconstruct mammalian food webs throughout millions of years. We found that trophic networks became sparser and less connected towards the present and that a higher number of prey species buffered predators against extinction.image (AU) | |
| Processo FAPESP: | 21/04220-1 - Influência de interações entre predadores e presas sobre a dinâmica macroevolutiva de mamíferos |
| Beneficiário: | João Claudio de Sousa Nascimento |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |