Remote sensing technology was used to study plant diversity in a prairie grassland. The researchers wanted to find out the best resolution for detecting diversity. They found that high-resolution imaging was most sensitive to diversity levels. Spectral diversity was best at detecting a mix of different plant species and their even distribution, rather than just the number of species. The optimal pixel size for detecting diversity in prairie plots was around 1 mm to 10 cm, similar to the size of a single plant. This study shows that the relationship between spectral diversity and biodiversity depends on the scale of observation, with spectral diversity being better at detecting species richness and evenness compared to phylogenetic diversity.