Abstract

Epiphytic microbial communities often have a close relationship with their eukaryotic host, assisting with defence, health, disease prevention and nutrient transfer. Shifts in the structure of microbial communities could therefore have negative effects on the individual host and indirectly impact the surrounding ecosystem, particularly for major habitat-forming hosts, such as kelps in temperate rocky shores. Thus, an understanding of the structure and dynamics of host-associated microbial communities is essential for monitoring and assessing ecosystem changes. Here, samples were taken from the ecologically important kelp, Ecklonia radiata, over a 17-month period, from six different sites in two distinct geographic regions (East and West coasts of Australia), separated by ∼3,300 kms, to understand variation in the kelp bacterial community and its potential environmental drivers. Differences were observed between kelp bacterial communities between the largely disconnected geographical regions. In contrast, within each region and over time the bacterial communities were considerably more stable, despite substantial seasonal changes in environmental conditions.

中文翻译：

---

澳大利亚海带的表面细菌群落显示出跨大陆的变化和区域内的相对稳定性

 抽象的

附生微生物群落通常与其真核宿主关系密切，有助于防御、健康、疾病预防和营养物质转移。因此，微生物群落结构的变化可能会对个体宿主产生负面影响，并间接影响周围的生态系统，特别是对于主要的栖息地形成宿主，例如温带岩石海岸的海藻。因此，了解宿主相关微生物群落的结构和动态对于监测和评估生态系统变化至关重要。在这里，我们在 17 个月的时间里从相距约 3,300 公里的两个不同地理区域（澳大利亚东海岸和西海岸）的六个​​不同地点采集了具有重要生态意义的海带Ecklonia radiata的样本，以了解海带细菌群落及其潜在的环境驱动因素。在基本不相连的地理区域之间观察到海带细菌群落之间的差异。相比之下，尽管环境条件发生了巨大的季节性变化，但随着时间的推移，每个区域内的细菌群落都更加稳定。