Outdoor seating in urban areas, such as park benches and café tables, may seem harmless, but it subtly reshapes the microhabitats of urban nematodes—tiny soil-dwelling worms critical to ecosystem health. These structures compact soil, reduce moisture retention, and limit organic matter accumulation, directly impacting nematode diversity and population density.

Studies show that shaded areas under seating often harbor fewer nematodes due to reduced microbial activity, while nearby exposed soil may experience temperature fluctuations that stress these organisms. Conversely, seating near greenery can create microclimates favoring certain nematode species, altering local soil food webs.

Urban planners must consider these invisible ecological effects when designing public spaces. Simple adjustments—like permeable seating foundations or strategic vegetation placement—could mitigate negative impacts while maintaining functional urban landscapes. The interplay between human infrastructure and microscopic life reveals the delicate balance of urban ecosystems.