Microbial communities on dry natural rocks are richer and less stressed than those on man-made playgrounds
ABSTRACT In modern urbanized societies, the incidence of major immune-mediated diseases is several times higher than before World War II. A potential explanation is that these diseases are triggered by limited possibilities to be exposed to rich environmental microbiota. This requires that the urban...
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| Language: | English |
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American Society for Microbiology
2025-05-01
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| Series: | Microbiology Spectrum |
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| Online Access: | https://journals.asm.org/doi/10.1128/spectrum.01930-24 |
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| author | J. Manninen M. Saarenpää M. Roslund P. Galitskaya A. Sinkkonen |
| author_facet | J. Manninen M. Saarenpää M. Roslund P. Galitskaya A. Sinkkonen |
| author_sort | J. Manninen |
| collection | DOAJ |
| description | ABSTRACT In modern urbanized societies, the incidence of major immune-mediated diseases is several times higher than before World War II. A potential explanation is that these diseases are triggered by limited possibilities to be exposed to rich environmental microbiota. This requires that the urban environment hosts less and poorer microbiota than the natural environment. The current study was designed to test the assumption that urban man-made environments host less and poorer environmental microbiota, compared to natural habitats. We selected two types of dry environments, natural rocks and playground rubber mats, both of which were used daily and extensively by children. In quantitative PCR and next-generation sequencing, bacterial abundance and richness were higher on the natural rocks than the rubber mats. Altogether, 67 amplicon sequence variants (ASVs) belonging mostly to Actinobacteria and Proteobacteria were indicative of rock microbiota, while three ASVs were indicative of rubber mats. Interestingly, bacteria formed more complex networks on rubber mats than natural rocks. Based on the literature, this indicates that the studied artificial dry environment is more challenging and stressful for bacterial communities than dry natural rocks. The results support the hypothesis that urban man-made environments host poor microbial communities, which is in accordance with the biodiversity hypothesis of immune-mediated diseases.IMPORTANCEThe current study provides new evidence that artificial urban play environments host poor microbial communities and provide a stressful environment for microbes, as compared to dry natural rocks. Through this, the current study underlines the need to enhance microbial diversity in urban areas, especially in outdoor play environments, which have a crucial role in providing essential microbial exposure for the development of children’s immune system. This research can potentially offer guidance for urban planning and public health strategies that support planetary health. |
| format | Article |
| id | doaj-art-372ab57b998942e8aaf7738182fc7dd6 |
| institution | OA Journals |
| issn | 2165-0497 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | American Society for Microbiology |
| record_format | Article |
| series | Microbiology Spectrum |
| spelling | doaj-art-372ab57b998942e8aaf7738182fc7dd62025-08-20T02:11:30ZengAmerican Society for MicrobiologyMicrobiology Spectrum2165-04972025-05-0113510.1128/spectrum.01930-24Microbial communities on dry natural rocks are richer and less stressed than those on man-made playgroundsJ. Manninen0M. Saarenpää1M. Roslund2P. Galitskaya3A. Sinkkonen4Faculty of Biological and Environmental Sciences, Ecosystems and Environment Research programme, University of Helsinki, Helsinki, FinlandFaculty of Biological and Environmental Sciences, Ecosystems and Environment Research programme, University of Helsinki, Helsinki, FinlandNatural Resources Institute Finland Luke, Helsinki, FinlandResearch Institute for Environmental Studies, Parede, PortugalNatural Resources Institute Finland Luke, Helsinki, FinlandABSTRACT In modern urbanized societies, the incidence of major immune-mediated diseases is several times higher than before World War II. A potential explanation is that these diseases are triggered by limited possibilities to be exposed to rich environmental microbiota. This requires that the urban environment hosts less and poorer microbiota than the natural environment. The current study was designed to test the assumption that urban man-made environments host less and poorer environmental microbiota, compared to natural habitats. We selected two types of dry environments, natural rocks and playground rubber mats, both of which were used daily and extensively by children. In quantitative PCR and next-generation sequencing, bacterial abundance and richness were higher on the natural rocks than the rubber mats. Altogether, 67 amplicon sequence variants (ASVs) belonging mostly to Actinobacteria and Proteobacteria were indicative of rock microbiota, while three ASVs were indicative of rubber mats. Interestingly, bacteria formed more complex networks on rubber mats than natural rocks. Based on the literature, this indicates that the studied artificial dry environment is more challenging and stressful for bacterial communities than dry natural rocks. The results support the hypothesis that urban man-made environments host poor microbial communities, which is in accordance with the biodiversity hypothesis of immune-mediated diseases.IMPORTANCEThe current study provides new evidence that artificial urban play environments host poor microbial communities and provide a stressful environment for microbes, as compared to dry natural rocks. Through this, the current study underlines the need to enhance microbial diversity in urban areas, especially in outdoor play environments, which have a crucial role in providing essential microbial exposure for the development of children’s immune system. This research can potentially offer guidance for urban planning and public health strategies that support planetary health.https://journals.asm.org/doi/10.1128/spectrum.01930-24biodiversity hypothesisurban environmentmicrobial community compositionsoil microbiotaurban microbiomeplanetary health |
| spellingShingle | J. Manninen M. Saarenpää M. Roslund P. Galitskaya A. Sinkkonen Microbial communities on dry natural rocks are richer and less stressed than those on man-made playgrounds Microbiology Spectrum biodiversity hypothesis urban environment microbial community composition soil microbiota urban microbiome planetary health |
| title | Microbial communities on dry natural rocks are richer and less stressed than those on man-made playgrounds |
| title_full | Microbial communities on dry natural rocks are richer and less stressed than those on man-made playgrounds |
| title_fullStr | Microbial communities on dry natural rocks are richer and less stressed than those on man-made playgrounds |
| title_full_unstemmed | Microbial communities on dry natural rocks are richer and less stressed than those on man-made playgrounds |
| title_short | Microbial communities on dry natural rocks are richer and less stressed than those on man-made playgrounds |
| title_sort | microbial communities on dry natural rocks are richer and less stressed than those on man made playgrounds |
| topic | biodiversity hypothesis urban environment microbial community composition soil microbiota urban microbiome planetary health |
| url | https://journals.asm.org/doi/10.1128/spectrum.01930-24 |
| work_keys_str_mv | AT jmanninen microbialcommunitiesondrynaturalrocksarericherandlessstressedthanthoseonmanmadeplaygrounds AT msaarenpaa microbialcommunitiesondrynaturalrocksarericherandlessstressedthanthoseonmanmadeplaygrounds AT mroslund microbialcommunitiesondrynaturalrocksarericherandlessstressedthanthoseonmanmadeplaygrounds AT pgalitskaya microbialcommunitiesondrynaturalrocksarericherandlessstressedthanthoseonmanmadeplaygrounds AT asinkkonen microbialcommunitiesondrynaturalrocksarericherandlessstressedthanthoseonmanmadeplaygrounds |