Cyanobacteria slime helps heal crushed desert soils fast
Aye NTT, Yizhaq H, Zaady E, Zubkov MV, Kamennaya NA
Soil Health
If you've ever seen a desert trail scarred by tire tracks that never seems to heal, this points to a way of actually reversing that damage instead of just fencing it off and waiting decades.
Deserts are covered in a thin living skin of soil crust that holds everything together, made mostly of cyanobacteria and other tiny organisms. When that crust gets crushed by vehicles or foot traffic, the soil turns to dust and blows away, and it can take a very long time to recover on its own. Researchers spread a sugary, gel-like substance harvested from cyanobacteria onto damaged soil, and within two years the treated ground was almost as stable and biologically active as untouched desert soil nearby.
Key Findings
Applying just 4 grams per square meter of EPS-rich cyanobacterial biomass restored soil stability and microbial enzyme activity to levels close to intact, undamaged desert soil.
The treatment outperformed a synthetic polyacrylamide soil stabilizer commonly used for erosion control, based on comparisons across the two-year field study.
Subsurface microbial communities retained the ability to break down the cyanobacterial polysaccharides even after two years, suggesting the restoration benefit is durable rather than temporary.
chevron_right Technical Summary
Scientists coated damaged desert soil with a sugary substance made by cyanobacteria and found it helped the soil rebuild its natural crust and microbial life within two years, offering a promising new tool for repairing land damaged by human activity like off-road vehicles or construction.
Abstract Preview
Original paper
Polysaccharide-rich cyanomass showed potential for long-term stabilization and ecological restoration of compression-degraded soils in arid drylands.
In drylands, which cover >40 % of the Earth's terra firma, anthropogenic soil compression damages biological soil crusts (biocrusts), disrupts subsurface microbial communities, and exposes destabil...
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