Abstract (en):
The limnological knowledge in the páramo is almost nonexistent, in the countries where these ecosystems are
present, research have been developed, mainly, in Andean and high Andean zones. In this context, in this study was formulated the question ¿How H´ diversity is associated, density, richness and biomass of macroinvertebrates with variables associated to Potamogeton sp., Azolla filiculoides y Myriophyllum aquaticum, these were: habitat of life (floating, emergent and submerged), biomass and habitat conditions?. The objective was to determine spatiotemporal changes of density, biomass and diversity of macroinvertebrates, depending of occupied habitat and environmental conditions. Samplings were carried out during four hydrological seasons. Then physic-chemical variables were measured in field and laboratory. There were found 19 genera/morphotypes of macroinvertebrates, the most relevant in terms of density and biomass were Helobdella, Hyalella and Tubificidae morphotype. In general, the ecosystem has an average H´ of 0.62 bits.Ind-1, and a Simpson dominance of 0.5. The density was correlated with electrical conductivity and stream flow; and biomass with conductivity and dissolved oxygen. The submerged macrophyte has the highest amount of biomass, density, macroinvertebrates richness and H´ biodiversity. The environment conditions were optimal for faunal diversity.
Abstract (es):
El conocimiento limnológico de los páramos es casi inexistente ya que las investigaciones se han desarrollado, principalmente, en zonas andinas y alto andinas. Al respecto, en este estudio se planteó la pregunta: ¿cómo se asocian la diversidad (H´), densidad, riqueza y biomasa de macroinvertebrados asociados a Potamogeton sp., Azolla filiculoides y Myriophyllum aquaticum, con las variables medidas en cada una de ellas: hábito de vida (flotante, emergente y sumergida), biomasa y condiciones de hábitat? El objetivo fue determinar cambios espaciotemporales de densidad, biomasa y diversidad de la fauna, en función del hábitat que ocupaban y de las condiciones ambientales. Los muestreos se adelantaron durante cuatro temporadas hidrológicas. Se tomaron muestras de las plantas y se extrajeron de ellas los invertebrados. Se midieron variables fisicoquímicas en campo y en laboratorio. Fueron identificados 19 géneros/morfotipos de macroinvertebrados, presentando mayor densidad y biomasa, Helobdella, Hyalella y Tubificidae. El ecosistema presentó H´promedio de 0,62 bits.ind-1 y dominancia promedio de 0,5. La densidad fue correlacionada con conductividad eléctrica y caudal, y la biomasa con conductividad y oxígeno disuelto. La macrófita sumergida presentó la mayor cantidad de biomasa, densidad, riqueza y H´ de macroinvertebrados. Las condiciones ambientales fueron optimas para la diversidad faunística.
Keywords:
Biodiversidad, Biomasa, Densidad, Laguna Los Tunjos, Limnología (es)
How to Cite
Alba-Hincapié, Ángela M., González-Rey, G., & Longo, M. (2016). Macroinvertebrates associated with macrophytes in lagoon La Virginia, páramo Sumapaz, Colombia. Biota Colombiana, 17. https://doi.org/10.21068/C2016v17s02a01
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