Biodiversity can be studied at different levels, including genes, species, ecosystems, and landscapes. Researchers have mainly focused on one level at a time, but few have looked at how these levels are connected. They use various methods like field surveys and remote sensing to study different aspects of biodiversity. The diversity of species and landscapes can be affected by the size of the area being studied. As the area gets bigger, the number of different species and types of landscapes also increases. This shows that the size of the area being studied can impact the diversity of life in that area.