Abstract (en):
Aquatic insects are important in the function of ecosystem. The objective of this study is to describe the structure and distribution of aquatic insects in four rivers which are located on three different slopes of the Sierra Nevada de Santa Marta (SNSM): Gaira, Tucurinca, Rancheria y Guatapuri. Gravel and macrophyte microhabitats were analyzed in each river with a Sumber sampler, the leaf litter fauna with a triangular net, and spray zones and stones were analyzed by manual collection. 5803 individuals were registered, 39 families and 72 taxa.
Abstract (es):
Los insectos acuáticos son importantes en el funcionamiento de los ecosistemas. El objetivo del presente trabajo fue conocer la estructura y distribución de los insectos acuáticos, en cuatro ríos que se encuentran en diferentes flancos de la Sierra Nevada de Santa Marta (SNSM): Gaira, Tucurinca, Ranchería y Guatapurí. En cada río se analizaron los microhábitats grava y macrófitas con red surber, la hojarasca con red triangular y las zonas de salpicadura y piedras mediante colecta manual. Se registraron 5803 individuos, 39 familias y 72 taxones. El río Guatapurí presentó la mayor abundancia con 1890 individuos. El orden más abundante fue Ephemeroptera con 1861 individuos. El género Simulium presentó la mayor abundancia (14,5%). En cuanto a la distribución de los organismos, los valores más altos se registraron en grava y hojarasca con 36,93% y 33,31%. Durante los periodos de baja precipitación en los ríos Guatapurí y Ranchería se registraron las mayores abundancias de organismos. Se obtuvieron dos nuevos registros, el género Podonomus (Chironomidae) en Guatapurí y el género Stenhelmoides (Elmidae) en Ranchería. De acuerdo a los resultados se pudo concluir que los ríos de la SNSM tienen alta riqueza genérica comparada con ríos de la zona andina y otras zonas templadas.
Keywords:
Estructura. Distribución espacial. Diversidad. Macroinvertebrados acuáticos. Microhábitats. (es)
Aquatic macroinvertebrates, Diversity, Microhabitats, Spatial distribution, Structure (en)
Aquatic macroinvertebrates, Diversity, Microhabitats, Spatial distribution, Structure (en)
How to Cite
Barragán, M. F., Tamaris-Turizo, C. E., & Rúa-García, G. A. (2017). Aquatic insect communities of the three slopes of the Sierra Nevada de Santa Marta, Colombia. Biota Colombiana, 17(2), 47–61. https://doi.org/10.21068/C2016.v17n02a05
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