Drone cameras can measure pigments indicating surface health of dryland soils

Drylands soils are being degraded by human activities and climate change, threatening the thin living layers covering their surface, called biocrusts, according to the U.S.

Geological Survey.

Composed of cyanobacteria, lichens, mosses, algae, fungi and bacteria, biocrusts play major roles in storing carbon, cycling nitrogen, preventing erosion and supporting ecosystems.

To better understand the status of these complex biological communities, a team led by researchers at Penn State developed a novel approach for assessing the health and function of biocrusts. ...