| Texto completo | |
| Autor(es): |
Borges, Jaqueline Santos
;
Arakaki, Jonathann Yukio
;
Costa, Tania Marcia
;
De Grande, Fernando Rafael
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ESTUARINE COASTAL AND SHELF SCIENCE; v. 299, p. 10-pg., 2024-02-27. |
| Resumo | |
Many intertidal species are expanding their distribution limits towards the poles as a consequence of increased temperature due to climate change. At the same time, some intertidal habitats have been reduced due to rising sea levels. Fiddler crabs inhabit mangroves, and different species occupy well-established zones. Due to the restricted mangrove areas and consequent latitudinal expansion of the species, the distribution and density of fiddler crabs may be subject to change. The overlap forces several species to cohabit in a smaller territorial space. Fiddler crab species can vary in size, which could decisively affect territorial competition. Using Leptuca urguayensis as a reference, we tested how competing species of different sizes (larger size: L. thayeri and Minuca panema; similar size: L. cumulanta and L. leptodactyla) might interact in future climate change scenarios. First, we showed that within the territory of L. uruguayensis, the species L. cumulanta and L. thayeri occurred mainly in the lower mesolittoral zone, while L. leptodactyla and M. panema predominated in the upper mesolittoral zone. In a laboratory experiment, we evaluated whether the density and size of the heterospecific competitors could alter the agonistic behavior of Leptuca uruguayensis. Our results indicated that increasing the density can increase the agonistic behavior of L. uruguayensis with a greater intensity against species of a similar size. In a second field experiment, we demonstrated that the presence of a burrow enhances the intensity of agonistic interactions between L. uruguayensis and species of similar size. Therefore, in a scenario of territorial expansion of fiddler crabs due to climate change, it is expected that similarly sized species represent a greater competitive threat to populations of L. uruguayensis. (AU) | |
| Processo FAPESP: | 20/03171-4 - Impacto das mudanças do clima e da perda da biodiversidade na força das interações tróficas em ecossistemas costeiros |
| Beneficiário: | Tânia Marcia Costa |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular |