When biodiversity fluctuates, the variations of organisms in environments will decrease as humans simultaneously create a negative impact on the region. For example, areas with more community development may have less biodiversity due to the human impact that is occurring. An area that has community planning can be compared to a more isolated area such as a forest that may have higher biodiversity since there is less human activity going on in the location. Fungi and lichen are easily identifiable in differing locations, as they are highly common in many places, allowing for straightforward measurement of biodiversity.