PDF(Pubmed)
Abstract：
The Mexican Central Pacific (MCP) region has discontinuous coral ecosystems with different protection and anthropogenic disturbance. Characterizing the bacterial assemblage associated with the sea urchin Toxopneustes roseus and its relationship with environmental variables will contribute to understanding the species\' physiology and ecology. We collected sea urchins from coral ecosystems at six sites in the MCP during the summer and winter for two consecutive years. The spatial scale represented the most important variation in the T. roseus bacteriome, particularly because of Isla Isabel National Park (PNII). Likewise, spatial differences correlated with habitat structure variables, mainly the sponge and live coral cover. The PNII exhibited highly diverse bacterial assemblages compared to other sites, characterized by families associated with diseases and environmental stress (Saprospiraceae, Flammeovirgaceae, and Xanthobacteraceae). The remaining five sites presented a constant spatiotemporal pattern, where the predominance of the Campylobacteraceae and Helicobacteraceae families was key to T. roseus\' holobiont. However, the dominance of certain bacterial families, such as Enterobacteriaceae, in the second analyzed year suggests that Punto B and Islas e islotes de Bahía Chamela Sanctuary were exposed to sewage contamination. Overall, our results improve the understanding of host-associated bacterial assemblages in specific time and space and their relationship with the environmental condition.
摘要：
墨西哥中太平洋（MCP）地区具有不连续的珊瑚生态系统，具有不同的保护和人为干扰。表征与海胆弓形虫相关的细菌组合及其与环境变量的关系将有助于理解该物种的生理和生态学。我们连续两年在夏季和冬季从MCP的六个地点的珊瑚生态系统中收集海胆。空间尺度代表了T.roseus细菌组最重要的变异，特别是因为IslaIsabel国家公园（PNII）。同样，与生境结构变量相关的空间差异，主要是海绵和活珊瑚覆盖。与其他地点相比，PNII表现出高度多样化的细菌组合，以与疾病和环境压力相关的家庭为特征(腐植科，Flammeovirgaceae,和黄杆菌科）。其余五个地点呈现恒定的时空模式，其中弯曲杆菌科和螺旋杆菌科的优势是玫瑰T.holobiont的关键。然而,某些细菌家族的优势，如肠杆菌科，在分析的第二年，表明PuntoB和IslaseislototesdeBahíaChamelaSanctuary暴露于污水污染。总的来说,我们的结果提高了对特定时间和空间中宿主相关细菌组合及其与环境条件关系的理解。
