Chinese researchers are working on a massive geoengineering project of \u201cartificial crusting.\u201d They are using vast amounts of blue-green algae to turn barren dunes into stable, reclaimable land.<\/p>\n
According to the\u00a0South China Morning Post (SCMP), this method marks the first time microbes have been used on such a massive scale to reshape natural landscapes.<\/p>\n
Known to have existed on Earth for billions of years, cyanobacteria are photosynthetic microbes found in almost every environment, from oceans to soil.\u00a0<\/p>\n
Developed at the Shapotou Desert Experimental Research Station, part of the Chinese Academy of Sciences (CAS), this innovative \u201cbiocrust\u201d technology is a product of years of research in China\u2019s Ningxia region.<\/p>\n
This cyanobacteria-based crust, which can withstand winds of 36 km\/h (22mph), is slated to reclaim up to 6,667 hectares in Ningxia over the next five years.<\/p>\n
Interestingly, this low-cost, high-efficiency technology could serve as a blueprint for global desert restoration and climate change mitigation.<\/p>\n
Reclaiming deserts<\/p>\n
Deserts are notoriously difficult to reclaim. Most plants cannot survive the abrasive, shifting nature of sand.\u00a0<\/p>\n
However, researchers at a research station in Ningxia have found a way to glue the desert floor together by deploying specially selected strains of cyanobacteria<\/a>.\u00a0<\/p>\n SCMP<\/a> explained that this creates an \u201cecological skin.\u201d These microorganisms can endure extreme heat and bone-dry conditions for years.\u00a0<\/p>\n Upon hydration from even slight rain, the cyanobacteria activate and proliferate, secreting a biomass-rich matrix that binds sand particles. This biological soil crust immobilizes shifting dunes and establishes a nutrient-rich substrate essential for the successional development of plant life.<\/p>\n In the natural world, a stable desert<\/a> crust can take 5 to 10 years to form. This new blue-green algae technique cuts that time to just one year for the formation of soil crust.<\/p>\n Solid seed method<\/p>\n The process was perfected through trial and error. Initially, scientists tried spraying liquid algae, but the method was too reliant on heavy infrastructure.<\/p>\n After screening over 300 species, researchers identified seven key cyanobacterial strains as the foundation of the project. These strains were blended with organic matter into a nutrient-rich paste and cast into hexagonal molds.\u00a0<\/p>\n The result is a specialized \u201csolid seed\u201d \u2014 a portable block designed to survive the journey into the deep desert and thrive upon arrival.<\/p>\n Once dispersed across the parched landscape, these engineered blocks lie in wait for moisture; the moment it rains, they burst into growth, knitting the sand together into a resilient, protective crust.<\/p>\n This technology is no longer just a laboratory experiment. Ningxia is preparing to apply the technique to over 6,000 hectares of desert in the coming years.<\/p>\n The geoengineering project is part of China<\/a>\u2019s ambitious \u201cGreat Green Wall\u201d to fight desertification. It moves beyond traditional tree planting to address the root cause of desertification: shifting sands.<\/p>\n These strategies are now being scaled globally to Africa and Mongolia.\u00a0<\/p>\n