Why do some organisms live in very large populations while others live in very small populations?
Some organisms prefer to live in large populations, while other organisms prefer to live in small populations. This is because they are using different strategies to live. When someone is playing a sport there are many different strategies of how to play the game. Some are better than others for particular players. Let’s say that you are living in an ecosystem that experiences a volcanic eruption that wipes out most of the population there. If you could design a “strategy” to overcome the problems created by this newly devastated environment, you would have two choices: stay and try to survive or move to a more stable environment. Suppose you stayed in this very unpredictable environment. One thing you would want to do is increase the numbers of your population quickly. So you would want to make lots of babies which are easy and cheap to make instead of a few very complicated and expensive ones. Even if you cannot spend much time raising your babies, if you made a lot, you could count