Bacterial communities as bioindicators of climate change in freshwater ecosystems: Tank bromeliads as model systems

作者：Daniel Di Pace Soares Penna, Gustavo Q. Romero, Mark P. Nessel, Angélica L. González, Valéria Maia de Oliveira · 发表于：Ecological Indicators · 年份：2025 · DOI：10.1016/j.ecolind.2025.113161 · 被引用次数：10 · 研究领域：Microbial Community Ecology and Physiology、Species Distribution and Climate Change、Marine and coastal ecosystems

• Temperature and pH drive bacterial community composition in tank bromeliads. • Rare species play key roles as connectors in bacterial networks from bromeliads. • Rising temperatures threaten network stability by impacting rare species. • Tank bromeliads offer a valuable model system to study climate change impacts. • Bacterial community in tank bromeliads may be bioindicators of climate change impact. Climate change, characterized by rising temperatures and extreme weather events, threatens tropical freshwater ecosystems. However, despite their global relevance, research on the effects of climate change on tropical environments remains scarce. Tank bromeliads, functioning as natural microcosms, offer a valuable model for studying tropical ecosystems. These plants host complex communities, including microorganisms, which may serve as bioindicators of climate change due to their adaptability and ubiquity. This study used 16S rRNA gene sequencing to examine bacterial communities in bromeliads along a latitudinal gradient on the Brazilian coast, using a space-for-time substitution approach. The analysis of water and sediment samples from 60 bromeliads across 10 sites revealed the phyla Pseudomonadota, Acidobacteriota, and Bacillota as the predominant members. Alpha diversity metrics were positively correlated with latitude and negatively with atmospheric temperature, while dbRDA and Mantel tests identified atmospheric temperature and pH as key factors influencing bacterial comm...