Colibríes (Apodiformes: Trochilidae) asociados al bosque nublado y páramo del sector Cajanuma del Parque Nacional Podocarpus
Research on birds distribution along elevation gradients allows us to evaluate changes in the richness and abundance of birds communities, allowing us to monitor variables and factors that influence their presence in ecosystems. This research describes the richness and abundance of hummingbirds in t...
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| Format: | bachelorThesis |
| Language: | spa |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://dspace.unl.edu.ec/jspui/handle/123456789/28250 |
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Add Tag | Summary: | Research on birds distribution along elevation gradients allows us to evaluate changes in the richness and abundance of birds communities, allowing us to monitor variables and factors that influence their presence in ecosystems. This research describes the richness and abundance of hummingbirds in the vegetation covers of BsMn02, BsAn02 (belonging to the Cloud Forest of the Cajanuma sector) and shrubby and herbaceous paramo, along a mountain peak in the Cajanuma sector. To analyze changes in the composition of hummingbirds, 17 counting points were established, separated by a minimum distance of 150 meters, in a range from 2,785.5 to 3,365.1 m a.s.l. Rarefaction/interpolation curves were made to compare hummingbird richness and abundance. Multivariate analyzes were used to determine the similarity of hummingbird communities; and a SIMPER analysis was carried out to identify the species influential in the community composition. To identify indicator or detector species, the IndVal method was used. As results, Coeligena lutetiae presented greater abundance during sampling. The nMDS and ANOSIM indicated that there is a degree of similarity in the composition and community structure of hummingbird species in vegetation covers. SIMPER indicated that Coeligena iris, Coeligena lutetiae, Eriocnemis luciani, Heliangelus amethysticollis, Heliangelus micraster and Metallura williami are the taxa that show differences in the different coverages. Heliangelus micraster, Coeligena iris, Eriocnemis luciani, Heliangelus amethysticollis, Metallura williami and Coeligena lutetiae were identified as indicator species. The analyzes suggest that the greatest diversity of hummingbirds in the Cajanuma area is in BsMn02 and BsAn02 (Cloud Forest). |
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