Browsing by Author "Chilo Becoche, Yulieth Yised"
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Item Análisis metataxonómico de corales Pocillopora damicornis sanos y blanqueados del arrecife La Azufrada del Parque Nacional Natural Gorgona(Universidad Santiago de Cali, 2024) Chilo Becoche, Yulieth Yised; Velásquez Velasco, Cindy Johana; González Vargas, Iván Andrés (Director)Coral bleaching occurs when corals lose their colors due to stressors and expel their symbiont algae (Symbiodiniaceae) that live in the tissue exposing the calcareous skeleton. With bleaching, the symbiotic microbes may exhibit changes in their communities. This is due to the alteration of the relationship between the coral and Symbiodiniaceae, affecting the coral balance due to stress. In this study, the bacterial communities associated with Pocillopora damicornis coral were analyzed with samples from 9 healthy and 9 bleached corals from La Azufrada reef on Gorgona Island using high-throughput sequencing to determine whether the bacterial community underwent changes when bleaching occurred in an isolated event. Physicochemical parameters of the water surrounding the corals indicated that nitrate and ammonium were at levels slightly higher than what is suggested as ideal for aquatic life. Alpha and beta diversity analyses indicated by Wilcoxon test and PERMANOVA that there were no significant differences between coral conditions. Proteobacteria, Bacteroidota, Rhodobacteraceae, Prevotellaceae, Prevotella and Fusobacterium showed slightly higher abundance in bleached corals than in healthy corals. Network analysis indicated that bacterial interactions in bleached coral were more complex, Endozoicomes presented more exclusion associations. Functional prediction showed that functions related to nitrogen cycling decreased with bleaching. This study revealed that the bacterial microbiota remained stable during an isolated coral bleaching event in the Pocillopora damicornis corals of La Azufrada reef during a bleaching event.