Resumen

Benthic macroinvertebrates as bioindicators of water quality in 4 islands of the Jambeli archipielago. RCTU [online]. 2025, vol.12, n.1, pp.10-22. ISSN 1390-7697.  https://doi.org/10.26423/rctu.v12i1.867.

Benthic macroinvertebrates are key indicators for assessing water quality. This study analyzes the biodiversity and distribution of benthic macroinvertebrate communities on four islands of the Jambelí Archipelago. Sampling was established in three zones, using standardized methodologies. Sixteen species belonging to 14 families distributed in four phyla were identified, Mollusca being the most representative. Ecological indices indicated moderate biodiversity and medium contamination, with Shannon-Wiener values between 1 and 2 Bits/ind and a more equitable Pielou index in Costa Rica and San Gregorio. The FFG trophic index indicated a stable trophic base, while AMBI reflected a slight environmental disturbance due to the presence of pollution-tolerant species. Statistical analysis indicated considerable differences in diversity and water quality (ANOVA, p < 0.05), while Chi-square showed a higher percentage of collectors in Costa Rica, suggesting accumulation of organic matter.

Palabras clave : Dominant species; Indexes; Macroinvertebrates; Mangrove..