We have now completed our look at the dynamics of individual plant populations. Until now, we have looked at population dynamics as being separate from the dynamics of other species. Common sense tells us that this does not reflect real life. Even a 'monoculture' maize field has hundreds (thousands?) of other species including weeds, insects, soil fungi and bacteria, mammals, and birds, many of whom will influence the population dynamics of maize. To begin our examination of how populations interact, we look first at competition in Chapter 8, and then herbivory and other types of interactions in Chapter 9. From there, we have a chapter on how populations and their interactions are studied (Chapter 10).

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