Diversity of Pseudoscorpiones (Arthropoda: Arachnida) in two fragments of dry tropical forest in the colombian Caribbean region

Abstract

The Dry Tropical Forest (DTF) is one of the most diverse yet threatened biomes of Colombia. There is limited information about the richness of the order Pseudoscorpiones (Arachnida) in this ecosystem in the country. Pseudoscorpions are ecologically interesting, as they may be good indicators of habitat conservation. However, it is still necessary to gather more knowledge related to its spatio-temporal variation. In this study, pseudoscorpion diversity variation was assessed in two fragments of the Dry Tropical Forest in the Caribbean region of Colombian: Reserva Campesina La Montaña (RCM) and Reserva La Flecha (RLF). Four samplings were carried out between March and September of 2016 to include the dry and rainy season. Pseudoscorpions were collected using litter sifting (SL) and manual capture (MC). A total of 260 individuals belonging to five families and eight species were collected. The most abundant was Pachyolpium granulatum (Olpiidae) and the richest family was Chernetidae. The collection methods were effective and complementary. Spatial variation was significant, but no temporal variation was observed however, there was a marked difference between the abundance at RCM in the dry season and the rainy season. In contrast, at RLF most individuals were found in the dry season in comparison with the rainy season. These new faunistic data is the first of its order in the Atlántico and Bolívar department.

¡El tamaño sí importa! Incidencia del tamaño del cebo en la captura de escarabajos coprófagos en el bosque seco tropical

“…El régimen de precipitaciones es bimodal tetraestacional, caracterizado por dos periodos secos comprendido entre diciembre-marzo y junio-julio con rangos de pluviometría entre 7.6-98 mm/mes. Los dos periodos de lluvias comprenden los meses de abril-mayo y septiembre-noviembre con rangos de precipitación entre 173-369 mm/ mes (Márquez & Martínez, 2020;Villareal et al, 2019). El promedio de la temperatura es de 35.92 ± 1.10 °C en época seca y 24.18 ± 0.80 °C en lluvias, mientras que la humedad relativa oscila entre 42.18 ± 1.47 % en seca y 93.06 ± 2.24 % en lluvias (Márquez & Martínez, 2020).…”

“…El promedio de la temperatura es de 35.92 ± 1.10 °C en época seca y 24.18 ± 0.80 °C en lluvias, mientras que la humedad relativa oscila entre 42.18 ± 1.47 % en seca y 93.06 ± 2.24 % en lluvias (Márquez & Martínez, 2020). Durante la época seca se presenta un déficit del agua y muchas fuentes de aguas como arroyos y quebradas se secan, permaneciendo pequeños charcos de agua únicamente en las zonas profundas de las quebradas que sirven como reservorios (Villareal et al, 2019).…”