Suppose a volcanic eruption on the island kills all but one male and one female lizard both are brown and all later generations are brown what is this an example of?
a genetic bottleneck
How might a volcanic eruption affect the area around a volcanic eruption including its plant and animal life?
The style of the volcanic eruption is very dependent on the amount of dissolved gas that is in the magma (liquid rock below the surface). If there is a high gas content the volcanic eruption will be explosive and create a log of ash. If the gas content is low the eruption produces more lava flows. An example of a high gas content eruption was the last major eruption of Mt. St. Helens in 1980…
Volcanic eruption can cause a lot of destruction, and kill millions of organisms around it. It can cause a tsunami as well. For example, if there was a volcanic eruption in Hawaii, then from that, a tsunami could hit Japan. The energy released from the volcanoe would hit the water and create a new disaster, the tsunami.
Yes, for example, an earthquake triggered the 1980 eruption of Mt. St Helens in the USA. However this is a slightly chicken and egg situation in thatthe earthquake itself was a result of the volcanic activity (high pressure magma causing bulging of the crust and flanks of the volcano, triggering earthquakes, which in turn caused a landslide which triggered the eruption). Please see the related link for more information.