Abstract
Nowadays, the intensity of agricultural activities is increasing in areas near water sources due to decreasing rains attributed to the increase in the phenomenon of climate change. The aim of this study was to analyze the structure of the order Trichoptera larvae in 7 tributaries in the Sierra Nevada de Santa Marta and their relationship with physicochemical variables. The samples were collected using a Surber's net with a 250 microns mesh, collected randomly taking 5 replicates for a total of 0.9 m2 for each river. A total of 868 individuals of the order Trichoptera, distributed in 9 families and 15 genera was found. Hydropsychidae and Leptoceridae were the best represented in the sampling, with 66 and 14%, respectively. Overall, the larvae showed a spatial variation. Despite the slightly high values of conductivity and nutrients in some tributaries, the values of diversity and abundance of caddisflies reflect the good state of tributaries in the Sierra Nevada de Santa Marta. The results of this study indicate that the tributaries are important reservoirs of caddisfly diversity.
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