WHAT THE EVIDENCE SAYS
Researchers collected 50 soil and root-system samples from 10 sampling points across five Singapore parks planted with Hopea odorata and characterized ectomycorrhizal fungi using DNA metabarcoding. They identified six genera and 21 operational taxonomic units. Community composition differed among parks while alpha diversity was similar, and measured soil pH and texture were not significantly associated with diversity or composition. Tomentella was the most frequently detected genus.
WHY IT MATTERS / OUR READ
Urban tree planting is also belowground community assembly. A tree species can survive across parks while carrying different fungal partners, so long-term urban-forest performance cannot be inferred from canopy planting lists alone.
CAVEATS / UNCERTAINTY
This is one planted dipterocarp species, 50 samples and five parks. OTU presence does not directly measure fungal function or tree benefit, and unmeasured site history, inoculum sources, management and soil chemistry may explain among-park differences. The study does not establish that low fungal diversity limits tree performance.
SOURCE
Biotropica — primary study
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