What are all of the natural events that can alter an ecosystem except?

Natural events that can alter an ecosystem include wildfires, floods, hurricanes, droughts, volcanic eruptions, and earthquakes. These events can change the landscape, affect species populations, and disrupt food webs. Additionally, human activities, such as deforestation and pollution, can also significantly impact ecosystems, although they are not considered natural events. Each of these factors can lead to both short-term and long-term changes in ecosystem dynamics.