Recursos florales usados por dos especies de Bombus en un fragmento de bosque subandino (Pamplonita-Colombia)

Abstract

ResumenSe presentan los resultados de un análisis palinológico en dos especies del género Bombus en cercanías de Pamplonita (Norte de Santander-Colombia) durante los meses de abril y mayo de 2010. A partir de muestras coprológicas se identificaron y contaron un total de 1585 granos, dentro de los cuales Solanaceae, Asteraceae, Malvaceae y Fabaceae fueron los taxa mas abundantes. En términos de diversidad, en abril se encontraron los valores más altos con respecto a los tipos de polen para ambas especies, aunque en B. pullatus, se observó mayor riqueza y dominancia para ambos meses. Finalmente, se puedo determinar un gran porcentaje de los granos de polen que se identificación en Solanaceae corresponden a Solanum quitoense. Los resultados presentados en este estudio dejan claro la importancia de la palinología al momento de establecer la dieta de estos organismos, además de reflejar el papel de estas especies como posible prestador de servicios ecosistemicos tanto en plantas silvestres como cultivadas en el caso de Solanum. AbstractIt is present the results of a palynological analysis of two species of the genus Bombus in vicinity of Pamplonita-Norte of Santander. On feces samples were identified and counted (april and may of 2010) 1585 grains of pollen, within which Solanaceae, Asteraceae, Malvaceae and Fabaceae were the more abundat taxa. With regard to the diversity, April was the most rich, diverse and dominant month; however in B. pullatus we observed greater wealth and dominance. Finally, it was possible to determine that a large percentage of pollen grains that were identified as Solanaceae correspond to Solanum quitoense. The results of this study make clear the importance of palynology at the time of establishing the diet of these species, in addition to reflect its role of those species as possible provider in ecosistemic services either in wild plant as a crops in Solanaceae case.

What Do Butterflies Tell Us about an Intermediate Disturbance in a Dry Tropical Forest Context?

“…The Protected Forest Reserve Serranía de Coraza is located in the north of Colombia, in the Caribbean plains, in the Department of Sucre over the Montes de María [32] (Figure 1). Coraza shows temperatures ranging between 25 and 28 • C and precipitation between 896 and 1233 mm per year.…”

“…Furthermore, there is a dry seasonal period from November to February where rainfall decreases to less than 200 mm. The average relative humidity is 83.5% [32,34].…”

“…Montes de María has been classified as one of the dry forest areas in the best state of conservation, mainly due to the implementation of the Protective Forest Reserve Serranía de Coraza and Montes de María [32]. However, agricultural activities have generated a mosaic landscape comprising patches of forest vegetation, pastures, and crops [31,33].…”

Complex landscapes partially mitigate negative pesticide effects on tropical pollinator communities

“…Anthers are poricidal and require sonication to release the pollen (Buchmann and Cane, 1989). Palynological identification of pollen provisions have shown that lulo pollen is collected by Bombus pullatus, Bombus atratus (Mercado et al, 2017), and Euglossa nigropilosa (Otero et al, 2014). Greenhouse experiments demonstrated the efficient use of commercial colonies of Bombus atratus (Almanza, 2007), and Bombus terrestris (Messinger et al, 2016) as pollinators but there is no information on the wild pollinator community.…”

Food niche overlap between two stingless bee species along a spatio-temporal gradient: implications for keeping and conservation

“…Thus, it is common to observe some degree of overlap in the food sources they collect, particularly when food becomes scarce, like during the rainy season. Actually, it has been observed that despite the existence of an extensive diversity of oral resources available in a given area, bees concentrate their efforts on some of them (Cauich et al 2004;Azmi et al 2017; Mercado et al 2017), perhaps due to an innate preference for small owers with radial symmetry, open corollas or short tubes, in which the access to food is relatively easy (Ramalho 2004). To evaluate the degree of food niche overlap among meliponine it is necessary to know the identity of the plants they collect food from, which is normally achieved by palynological analysis, that helps in identifying the origin of the pollen grains in pollen or honey samples (Eltz et al 2001).…”