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The order Plecoptera represents one of the most relevant groups of aquatic insects for bioindication in Colombia. In recent years, the knowledge on the order has increased greatly; nevertheless, in some areas of the Andean region, the taxonomic and ecological information is still incipient. Given the importance of the plecopterans in high mountain streams, we evaluated the relationship between the presence and abundance of nymphs of the genus Anacroneuria with physicochemical and bacteriological variables in three Andean microbasins associated with the Combeima River (Tolima, Colombia): Las Perlas, La Plata, and Cay streams. We conducted six daytime collections with a Surber net in different sections of the streams during a hydrological cycle (2016 – 2017) with high rainfall, low rainfall, and transitions. We registered 750 organisms of Anacroneuria and we assigned them to two morphospecies (Asp1 and Asp2) by biometry. Specific relationships were found with certain physicochemical variables in each stream using a principal component analysis (PCA). A negative correlation was found in the Las Perlas stream between the abundance of Asp1 and phosphorus (rs=-0.5266), in La Plata stream with electrical conductivity (rs=-0.4725), and with Ciencias Naturales

revista de la academia colombiana de ciencias exactas, físicas y naturales/revista de la academia colombiana de ciencias exactas, físicas y naturales

Estadios ninfales de Anacroneuria spp. (Plecoptera: Perlidae) y su relación con variables fisicoquímicas en tres microcuencas del río Combeima (Ibagué, Colombia).