ED002. Diptera pollinator diversity in a land use intensity gradient in high Andean ecosystems in Ecuador
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Abstract
In tropical high Andean ecosystems, it has been shown that native arthropod biodiversity has been almost completely replaced by changes in land use, and it is presumed that this dynamic may also include pollinators. It is known that in these systems most pollinators belong to the order Diptera, in contrast to tropical sites where bees predominate. The objective of this study is to determine how the diversity of potential dipteran pollinators responds to three types of land use: native forest, forest under natural restoration and cattle pastures in the province of Pichincha, Ecuador. Richness and abundance data were recorded using colored pan-trap plates, 75 for each type of land use. Diversity indices were used to determine equity, dominance, and richness. A Bray-Curtis cluster analysis was performed to determine the β-diversity of the community. One-way ANOVA was used to determine if there are significant differences in richness and abundance among the sampled systems. A total of 44 genera were found in the three systems: 38 in native forest, 42 in restored forest and 31 in grasslands. The diversity indices indicated that in the native forest there is greater equity and dominance, in contrast to the pasture. Through cluster analysis it was determined that the native forest and the forest under restoration are similar, unlike the pasture. The ANOVA results showed that native forest and pasture present greater differences, as well as pasture and forest under restoration. This research provides a characterization of a community of potential dipteran pollinators, highlighting their importance in key processes of ecological restoration, conservation and management of biodiversity and ecosystem health.
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