Researchers at Penn State are using drone cameras to measure pigments that indicate the surface health of dryland soils [1].
This technology allows scientists to monitor biocrusts—thin living layers on the soil surface—which are critical for maintaining ecosystem stability in arid regions. Because these biological communities are highly sensitive to environmental shifts, remote sensing provides a non-invasive way to track degradation across large areas.
Biocrusts are composed of cyanobacteria, lichens, mosses, algae, fungi, and bacteria [1]. Researchers at Penn State said these communities play major roles in storing carbon, cycling nitrogen, preventing erosion, and supporting ecosystems [1].
However, these essential layers are under threat. The U.S. Geological Survey said drylands soils are being degraded by human activities and climate change, threatening the thin living layers covering their surface [1].
By analyzing the pigments captured by drone imagery, the team can assess the current status of these soils without disturbing the fragile crust. The researchers said the goal is "to better understand the status of these complex biological communities" [1].
Traditional soil sampling often requires physical disruption of the ground, which can further damage the very biocrusts scientists aim to protect. The use of drone-based pigment analysis offers a scalable alternative to manual field surveys, enabling faster data collection over vast, remote landscapes.
“Drylands soils are being degraded by human activities and climate change”
The transition to drone-based monitoring represents a shift toward precision conservation in arid regions. By identifying pigment changes as biomarkers for soil health, researchers can detect ecological decline before it becomes irreversible, providing a critical tool for land management in the face of accelerating desertification.
