Related Experiment Video
Updated: Aug 5, 2026
07:00
Microbiota of Attine Ants' Gardens: Visualizing a Microbial Landscape by Scanning Electron Microscopy
Published on: October 4, 2024
Cigarette Butts as an Emerging Urban Habitat Driving Microbial Niche Differentiation
Ting Xie1,2, Jia-Yang Xu1,2, Da Lin1,3
1State Key Laboratory of Regional and Urban Ecology, Ningbo Urban Environment Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
Research (Washington, D.C.)
|July 28, 2026
Summary
Cigarette butts create unique urban habitats that alter microbial evolution. These pollutants reshape microbial communities, favoring fast-growing bacteria like Pseudomonadaceae, impacting urban ecosystem health.
Area of Science:
- Environmental microbiology
- Urban ecology
- Microbial evolution
Background:
- Cigarette butts are prevalent urban pollutants, yet their impact on microbial life-history strategies and evolution is understudied.
- Limited evidence exists on the ecological effects of cigarette butts on microbial communities.
Purpose of the Study:
- To investigate how the cigarette butt niche shapes microbial community composition, functional potential, and evolutionary patterns.
- To understand microbe-driven evolution on artificial urban surfaces.
Main Methods:
- Collected cigarette butts, litter, and soil from urban parks across 35 Chinese cities.
- Utilized third-generation 16S ribosomal RNA sequencing, metagenomics, and transcriptomics.
- Performed population genomic analysis and pure culture experiments.
Main Results:
- Microbial communities in cigarette butts were distinct, dominated by Proteobacteria (Pseudomonadaceae), and shaped by deterministic processes.
- Butt-associated microbes exhibited environmental responsiveness and fast-growth strategies, unlike litter communities.
- Evidence of stronger positive selection in Pseudomonadaceae and gene up-regulation in *Pseudomonas aeruginosa* due to cigarette butt exposure.
Conclusions:
- Cigarette butts act as an emerging ecological niche that significantly reshapes microbial community assembly and adaptive evolution.
- This study provides insights into microbe-driven evolution on artificial surfaces and urban ecosystem health.
Related Concept Videos
01:25Microbial Mats
Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...
01:22Microenvironments
Microorganisms inhabit highly localized spaces known as microenvironments, which are defined by distinct physical and chemical characteristics. These include oxygen concentration, pH, temperature, light availability, and nutrient levels. The conditions within a microenvironment can differ markedly from those in the surrounding area and significantly influence microbial growth, metabolism, and community structure.Microenvironments often display sharp physicochemical gradients over small spatial...
01:27Microbiota of the Large Intestine
The large intestine hosts the most densely populated microbial ecosystem in the human body. This complex community primarily consists of anaerobic bacteria, with Bacillota (formerly Firmicutes) and Bacteroidota (formerly Bacteroidetes) as the predominant groups. The distribution of these microbes varies along different sections of the large intestine, influenced by local environmental factors such as oxygen availability and nutrient composition.The cecum, located at the beginning of the large...
01:29Soil Microbial Ecology
Soil microbial ecology is defined by highly diverse, spatially structured communities that drive nutrient cycling, organic matter turnover, and overall ecosystem stability. Although a gram of soil can contain thousands of bacterial and archaeal taxa, the ecological processes they mediate are even more crucial for sustaining terrestrial life.Microhabitats and NichesSoil is a heterogeneous mixture of minerals, organic matter, water, and air. Microbes inhabit distinct microhabitats formed by...
01:26Microbes and Methanogenesis
Methanogenesis is a critical microbial process in anaerobic ecosystems responsible for the biological production of methane, a potent greenhouse gas and valuable biofuel. This metabolic pathway is primarily facilitated by methanogenic archaea, which thrive in anoxic environments such as wetlands, sediments, and animal gastrointestinal tracts. The absence of oxygen in these habitats prevents aerobic respiration, thereby favoring alternative biochemical pathways for organic matter degradation.In...
01:28Introduction to Microbial Ecology
Microbial ecology examines the complex web of interactions and diversity among microorganisms within various ecosystems. This field seeks to understand how microbial populations adapt to and influence their environments and how these interactions shape broader ecological processes. Microbes are integral to ecosystem function, participating in nutrient cycling, energy flow, and the maintenance of environmental homeostasis.An ecosystem represents a dynamic interaction between living organisms...