Browsing by Autor "Fabiola Ospina Bautista"

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Diversidad de insectos acuáticos en quebradas impactadas por agricultura y minería, Caldas, Colombia
(Vicerractoría Investigación, 2017) Sebastián Villada‐Bedoya; Fabiola Ospina Bautista; Lucimar Gomes Dias; Jaime Vicente Estévez Varón
Freshwater ecosystems are under severe anthropic pressure (e.g. agriculture and mining), which generates adverse effects on the diversity of aquatic insects. We evaluated the insect community in streams impacted by agriculture and mining, and determined how these activities affected the community. We studied six streams in Caldas (Colombia), two with mining and two with agriculture impact. We collected the insects using a Surber net with three replicates per substrate (fine sediment, stones, and litter). In total, 12 502 aquatic insects were collected. The most representative genera were Baetodes, Simulium, and Cricotopus (57.7 %). Streams with agricultural activity had lower aquatic insects diversity than mining impact (F2,309 = 21.82, p = 0.001). The agriculture areas presented a structure dominated by Simulium and Cricotopus (Diptera, pollution-tolerant morphospecies). Baetodes dominated in stones substrate, Cricotopus in sediment, and Simulium and Cricotopus dominated in litter (F2,309 = 2.84, p = 0.001). Therefore, both factors (impact and substrate type) are being important in determining the diversity of aquatic insects. Our results suggested that agricultural activity has a higher impact on the diversity of aquatic insects, which may be associated with the loss of riparian vegetation.
Diversidad de invertebrados acuáticos asociados a Bromeliaceae en un bosque de montaña
(2008) Fabiola Ospina Bautista; Jaime Vicente Estévez Varón; Emilio Realpe; Fernando Gast
Se estudiaron los invertebrados acuáticos asociados a los depósitos de agua de Tillandsia turneri y T. complanata (Bromeliaceae) en un bosque de montaña con el fin de determinar diferencias en la comunidad de invertebrados y relacionarlas con las variables morfología y fisicoquímicos de la bromelia. Se muestrearon 19 individuos de cada especie de Bromeliaceae, y a cada uno se le estableció la comunidad de invertebrados acuáticos, el contenido de agua, de hojarasca y variables morfológicas y fisicoquímicas. Se encontraron 23 morfoespecies, dentro de las cuales el orden Diptera fue el más diverso y abundante; algunos géneros estuvieron presentes en solo una de las especies de Bromeliaceae. La comunidad de invertebrados acuáticos fue similar entre las dos bromelias. Para T. complanata las medidas del ancho de la hoja y contenido de hojarasca se relacionan con el número de especies. Para T. turneri la riqueza de Margalef fue explicada por un modelo que incluye las variables numero de hojas, ancho de la vaina y contenido de agua.
First report of the genus Systelloderes (Hemiptera: Heteroptera: Enicocephalidae) in Guzmania multiflora (Bromeliaceae) in Colombia
(2018) Fabiola Ospina Bautista; Camilo Llano; Emilio Realpe
The relationship between purely predacious Enicocephalidae and plants is relatively unknown. This study reports the occurrence of two species of Systelloderes in Guzmania multiflora (Bromeliaceae) from a mountain forest of Colombia. This was conducted in the Reserva Forestal Protectora de las Cuencas Hidrográficas de Rio Blanco y Quebrada Olivares forest reserve in Caldas, Colombia. Bromeliads located at heights between one to three meters above the ground were used to collect Enicocephalidae. Systelloderes species have been previously reported in Colombia; however, this genus had not been found in bromeliads until now.