Diet and ecomorphological relationships of an endemic, species-poor fish assemblage in a stream in the Iguaçu National Park

A study of the fish assemblage in Iguaçu National Park reveals that low species richness does not lead to broader trophic niches or the absence of key ecomorphotypes. Researchers analyzed the diet and morphology of seven endemic fish species, finding low diet overlap and distinct ecomorphological traits, suggesting niche partitioning even in species-poor environments. The study used quarterly electrofishing sampling from 2011 to 2012, analyzing stomach contents and body morphology through PCA, with a partial Mantel test confirming the independence of diet and morphology from phylogeny.

Neves, M. P., Delariva, R. L., & Wolff, L. L. (2015). Diet and ecomorphological relationships of an endemic, species-poor fish assemblage in a stream in the Iguaçu National Park. Neotropical Ichthyology, 13(1), 245–254. https://doi.org/10.1590/1982-0224-20140124