This video, we're going to talk about how populations often exhibit characteristic patterns of dispersion. Now, dispersion can be defined as the degree of spacing between individuals in a population. Now, of course, recall from previous lesson videos that population density also gives a sense of the degree of spacing and how crowded a population is. However, dispersion provides an even more detailed insight into the degree of spacing than population density alone. Now, populations can really only exhibit 3 general patterns of dispersion, which we have down below in this image.
And the first is a clumped pattern of dispersion, which, as its name implies, is when individuals within a population are aggregated in clumps, patches, or groups, just as you can see in this little diagram in the top left. Now, clumped is actually the most common pattern of dispersion, as resources in nature also tend to be clumped in patches. And also, organisms may clump for several different reasons, including increasing their predation success. As these wolves hunt in packs, they increase their chances of success. But they may also clump for completely different reasons, such as increasing their chances of remaining safe.
Now, the next pattern of dispersion that we have is uniform, and, as its name implies, this is when individuals within a population are uniformly or evenly distanced from one another, just as you can see in this little diagram in the top left. Now, organisms display a uniform pattern of dispersion when they are very territorial about their own personal space and their resources. And so, notice that these birds here are very evenly spaced from one another. Now, last but not least, the final dispersion pattern is a random dispersion pattern. And, as its name implies, this is when there is an unpredictable amount of spacing between individuals and the population.
And often, plants that have wind-dispersed seeds will display this random pattern of dispersion, just as you can see with these dandelions here. Now, one thing that's very important for you to note is that the type of dispersion depends greatly on the scale of observation. And so, for example, if we were to zoom in on just one of these clumped patches, then we might actually say that it has a uniform pattern of dispersion, and so that's why it greatly depends on the scale of observation. Another important note is that a population is not necessarily limited to any one of these dispersion patterns, and the dispersion pattern can actually change for a population over time. So that concludes this video, and I'll see you all in our next one.