Final answer:
Invoking natural events for species disappearance refers to considering density-independent ecological factors that can lead to a species' decline or extinction, such as environmental disturbances. Biogeography also plays a role in understanding species distribution in relation to natural and human-caused events.
Step-by-step explanation:
Invoking natural events to account for species disappearance is an example of examining the density-independent regulation factors in ecology. These factors, usually abiotic, such as forest fires, volcanic eruptions, or other environmental disturbances, can have severe impacts on species populations, leading to a decrease in numbers or even extinction. For example, the study of an endangered butterfly species and its patterns that allow it to escape predators demonstrates ways in which species adapt to their environment or respond to natural events.
The biogeography of a species can also be crucial in understanding the distribution of species both in the past and present. This field addresses how natural events and human activity, whether current or historical, influence the distribution and survival of species. For instance, the vast North American buffalo herds were greatly diminished due to exploitation by European settlers in the 1850s, showcasing an anthropogenic impact on species extinction.