Datos de transectas de aves en la Reserva Don Carmelo, en dos situaciones de perturbación por Ctenomys mendocinus

Name: Datos de transectas de aves en la Reserva Don Carmelo, en dos situaciones de perturbación por Ctenomys mendocinus
License: https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Keywords: desert Puna

Datos de investigación

Datos de transectas de aves en la Reserva Don Carmelo, en dos situaciones de perturbación por Ctenomys mendocinus

Autores: Borghi, Carlos Eduardo Icon

Publicador: Consejo Nacional de Investigaciones Científicas y Técnicas

Fecha de depósito: 13/06/2024

Fecha de creación: 14/02/2003-18/10/2004

Clasificación temática:

Ecología

Resumen

Herbivorous subterranean rodents, such as Ctenomys mendocinus (tuco-tuco), have a significant impact on vegetation cover and composition. This study aimed to examine the indirect influence of tuco-tucos on bird populations and assemblages in the southernmost region of the desert Puna. In a shrub-steppe community, at an altitude of between 3000 and 3100 m above sea level, bird surveys were conducted from February 2001 to October 2004. Transects of 50 m in length and 40 m in width were established: 56 located in highly disturbed patches and 53 in patches with low disturbance by tuco-tucos. Our results show that areas with higher disturbance by tuco-tucos are associated with a decrease in bird abundance (93 individuals in disturbed areas vs. 226 in undisturbed areas) and lower species richness (6 species in disturbed areas vs. 11 in undisturbed areas).

Métodos

To assess the influence of Ctenomys mendocinus on bird populations, fieldwork was conducted from February 2003 through October 2004. We selected two types of patches: (1) patches highly disturbed by tuco-tucos (with high density of holes [1.73 ± 0.11 /m2, mean ± SE] and mounds [0.91 ± 0.03 /m2];= ‘‘disturbed patches’’), and (2) patches relatively undisturbed by Ctenomys (with low density of holes [0.18 ± 0.05 /m2] and mounds [0.12 / ± 0.02 / m2]; = ‘‘undisturbed patches’’) Lara et al. 2007. We randomly selected 109 patches (with a diameter of 50 meters or larger) for this purpose, divided between disturbed (56) and undisturbed (53), ensuring each patch was represented by a single transect. These transects, 50 m in length and 40 m in width, were placed at least 200 m apart to minimize overlap in bird territories. Surveys were carried out during times of peak bird activity – in the early morning (7:30 am to 10:30 am) and late afternoon (4:30 pm to 7:30 pm) – across three seasons: summer (February 2003), autumn (May 2003), and spring (October 2004). Each transect was walked at a steady pace for 30 minutes by the same observer, who recorded sightings of bird species, identified with the help of the field guide by Narosky and Yzurieta (2003).

Palabras clave: desert Puna, ecological engineers, Ctenomys mendocinus, bird assemblages

Alcance geográfico

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Identificador del recurso

URI: http://hdl.handle.net/11336/237990

Colecciones

Datos de Investigación(SEDE CENTRAL)
Datos de Investigación de SEDE CENTRAL

Citación

Borghi, Carlos Eduardo; (2024): Datos de transectas de aves en la Reserva Don Carmelo, en dos situaciones de perturbación por Ctenomys mendocinus. Consejo Nacional de Investigaciones Científicas y Técnicas. (dataset). http://hdl.handle.net/11336/237990

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