Water quality characterization of sites preferred by the West Indian Manatee (<em>Trichechus manatus<em>) in the Paredes Wetlands of the middle Magdalena River Basin in Santander state, Colombia

Abstract (en):

This study characterized water quality at sites of preference of the West Indian manatee (Thrichechus manatus) in the Cienaga of Paredes, an area recognized as of great ecological importance for the establishment of the species within the Middle Magdalena of Santander state (Colombia). From previous work and structured interviews eight locations were identified of which four sites were selected: Los Pozos, La Chorola and Quebrada La Gómez for greater sighting reports for shelter and food and the Punta del Roblar site for reproductive activities. The environmental quality of these sites was assessed using the physicochemical index ICA and biological BMWP / col both agree that the site with the worst water quality corresponds to the Quebrada Gomez with acceptable and very critical appraisals, respectively; the other sites were very similar to this assessment. The results of the analysis of repeated measures (ANOVA) showed no significant differences between these, but did find differences between seasons with the lowest value assigned to the last month of the year of sampling (ICA X = 0.62 ± 0.15). Continuous monitoring of the environmental conditions of Manatee habitat is urgent, to allow us to obtain an adequate understanding of the relationship between ecosystem health and animal health, in order to establish management strategies that contribute to the conservation of the species at the regional scale.

Abstract (es):

Este estudio caracterizó la calidad del agua en sitios de preferencia del manatí antillano (Thrichechus manatus) en la ciénaga de Paredes, reconocida como área de gran importancia ecológica para la especie, dentro de la región del Magdalena Medio santandereano (Colombia). A partir de trabajos previos y entrevistas estructuradas se identificaron ocho localidades de las cuales se seleccionaron cuatro: Los Pozos, La Chorola y la quebrada La Gómez (reportes de mayor avistamiento para refugio y alimentación), y Punta del Roblar, importante para actividades reproductivas. La calidad ambiental de estos sitios fue evaluada utilizando el índice fisicoquímico (ICA) y el índice biológico (BMWP/col). Ambos coinciden que el sitio con la peor calidad de agua corresponde a la quebrada La Gómez con valoración aceptable (ICA) y muy crítica (BMWP/col); los sitios restantes se mantienen muy cercanos a esta evaluación. Los resultados del análisis de medidas repetidas ANOVA no mostraron diferencias significativas entre stios, por el contrario de lo encontrado entre temporadas, identificándose con la valoración más baja el último mes del año de muestreo (ICA X=0,62 ± 0,15). Estos resultados pueden identificar una amenaza para esta población de manatí y es importante complementarlos con estudios en diferentes temporadas climáticas relacionados con las comunidades asociadas a las macrófitas, las cuales ampliarían el conocimiento de las relaciones ecológicas entre un vertebrado herbívoro y los demás niveles tróficos, y así establecer estrategias de manejo que contribuyan a la conservación de la especie a nivel regional.

Keywords:

<em>Trichechus manatus manatus<em>, Conservación, Humedales, Factores fisicoquímicos, Bioindicación, Calidad ambiental (es)

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Mojica-Figueroa, B. H., Arévalo-González, K., & Murillo, J. (2014). Water quality characterization of sites preferred by the West Indian Manatee (<em>Trichechus manatus<em>) in the Paredes Wetlands of the middle Magdalena River Basin in Santander state, Colombia. Biota Colombiana, 15(Supl. 1). Retrieved from https://revistas.humboldt.org.co/index.php/biota/article/view/350

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