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# Mexico City rooftop soils did not simply underperform ground-level gardens
- URL: https://intelligence.wildlandseco.com/2026-10-15-mexico-city-rooftop-soil-seasonality-function/
- Published: 2026-10-15T17:50:19.000Z
- Updated: 2026-10-15T17:50:19.000Z
- Description: Season and substrate history shaped microbial soil functions more consistently than the roof-versus-ground label.
- Author: Benjamin Worlund
- Tags: urban soils, rooftop gardens, microbial ecology, Cities, Land, Methods, #ecological-intelligence, #brief-2026-10-15, #global-radar, #peer-reviewed, #geo-latin-america-caribbean

Evidence

Peer-reviewed

Geography

Five urban gardens in Mexico City; three ground-level and two rooftops

System

Urban horticultural soils; microbial nutrient cycling

## WHAT THE EVIDENCE SAYS

An urban soil comparison sampled three ground-level and two rooftop gardens in wet and dry seasons. Most univariate microbial and soil chemistry tests showed few differences by location; multivariate variation tracked season and interactions with substrate history, while one fungal-guild ratio differed on roofs.

## WHY IT MATTERS / OUR READ

Green infrastructure should be measured by function—moisture, nutrient cycling and soil biota—not merely whether a garden is above or below street level. Seasonal baselines matter when evaluating urban soil performance.

## CAVEATS / UNCERTAINTY

Only five gardens were studied. A non-significant roof-versus-ground contrast is not proof of equivalence; design, irrigation and underlying growing media could matter elsewhere.

## SOURCE

Urban Ecosystems · Mexico City urban garden field study  
[View original evidence ↗](https://doi.org/10.1007/s11252-026-02115-z?ref=intelligence.wildlandseco.com)

From the Morning Brief · 2026-10-15

[Read the full Morning Brief →](https://intelligence.wildlandseco.com/morning-brief-2026-10-15/)