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Spatial diversity of dung beetle assemblages (Coleoptera: Scarabaeidae: Scarabaeinae) in five ecoregions from Sucre, Colombian Caribbean coast

Authors: Amell-Caez, Yina; Decastro-Arrazola, Indradatta; García, Héctor; Monroy-G., José D.; Noriega, Jorge Ari;

Spatial diversity of dung beetle assemblages (Coleoptera: Scarabaeidae: Scarabaeinae) in five ecoregions from Sucre, Colombian Caribbean coast

Abstract

[ES] La biodiversidad cambia en el espacio-tiempo generando gradientes complejos. Estos gradientes afectan la estructura de las comunidades creando dos posibles patrones de recambio espacial, reemplazo o anidamiento. Existen pocos estudios que busquen analizar los cambios de la diversidad a lo largo de gradientes ambientales en la región Caribe de Colombia. Buscando entender estos cambios, se realizó un muestreo en cinco ecorregiones del Caribe colombiano (Golfo de Morrosquillo, Montes de María, Sabanas, San Jorge y La Mojana) usando a los escarabajos coprófagos como un grupo bioindicador. En cada región se estableció un transecto lineal con 20 trampas de caída cebadas con excremento. Se evaluaron las diferencias en la abundancia, riqueza, Shannon-índice, equidad y grupos funcionales entre ecorregiones y condiciones ambientales. Un total de 923 individuos pertenecientes a 27 especies fue recolectado. La tribu Deltochilini y el género Canthon fueron los más diversos. La especie más abundante fue Silvicanthon aequinoctialis. Se encontraron diferencias significativas en los parámetros medidos entre las ecorregiones. La diversidad Beta presenta un claro patrón espacial demostrando un alto recambio y un bajo anidamiento. Los Montes de María presentaron la mayor diversidad, asociada con la conservación de fragmentos de bosque. Es fundamental generar estrategias de conservación y crear un nuevo Parque Nacional Natural para los Montes de María, previniendo el impacto negativo causado por la expansión de la frontera agrícola y ganadera. Finalmente, este estudio representa un primer esfuerzo para entender los patrones espaciales de los escarabajos coprófagos en el Caribe colombiano, relacionando los gradientes ambientales con la dinámica espacial de la diversidad.

[EN] Biodiversity changes in space and time generate complex gradients. These gradients affect community structures, generating beta diversity replacement patterns. The two main patterns of spatial replacement are turnover and nestedness. However, there are very few studies that analyze diversity changes along environmental gradients in the Colombian Caribbean region. In an attempt to understand these spatial changes, a complete sampling was conducted in five Colombian Caribbean ecoregions (Golfo de Morrosquillo, Montes de María, Sabanas, San Jorge, and La Mojana) using dung beetles as an indicator. In each region, a linear transect with 20 pitfall traps baited with dung was established. Differences in abundance, richness, Shannon-index, evenness, and beta diversity between ecoregions were evaluated. A total of 923 individuals belonging to 27 species were collected. The tribe Deltochilini and the genus Canthon were the most diverse. The most abundant species was Silvicanthon aequinoctialis. Significant differences were found in the parameters measured between the ecoregions. A Beta diversity index established a clear spatial pattern demonstrating high turnover with low nestedness values. The Montes de María ecoregion has the highest diversity, which was linked with the maintenance of conserved forest fragments. It is advisable to generate conservation strategies and the designation of a new National Natural Park for Montes de María in order to stop the negative impact caused by agricultural and cattle farming expansion in the region. This study represents the first effort to understand dung beetle spatial patterns within the ecoregions of the Colombian Caribbean region through connecting environmental gradients and spatial diversity dynamics.

This project was part of the B. Sc. thesis of Yina Amell-Caez at the biology program of the University of Magdalena supervised by Jorge Ari Noriega.

Keywords

spatial heterogenity, región Neotropical, Beta diversity, ecorregiones, Ecoregions, Scarabaeidae, Colombia, diversidad beta, Bioindicadores, Bioindicators, beta diversity, Spatial heterogenity, Neotropical region, ecoregions, heterogeneidad espacial

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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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