Ecological Niche Changes of Two Sympatric Species (<i>Pennahia argentata</i> and <i>Larimichthys polyactis</i>) Revealed by Bulk and Compound Specific Isotope Analyses.

ABSTRACT: Sympatric species in marine ecosystems often share habitats and food resources, leading to niche competition. We performed ecological niche width estimation based on bulk carbon (δ¹³C) and nitrogen (δ¹⁵N) isotopes and trophic position estimation via compound-specific isotope analysis (CSIA) of amino acids to compare ecological interspecific competition between two sympatric fish species, Pennahia argentata and Larimichthys polyactis in Gwangyang Bay, South Korea. Moreover, ontogenetic niche changes were investigated by size classification for each species. The δ¹³C and δ¹⁵N values in P. argentata showed no significant size-related differences (p > 0.1), while L. polyactis exhibited significant variation (p

SUBMITTER: Yu TS 

PROVIDER: S-EPMC12742453 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature