Population dynamics of forest insects
Summary :
Table of Contents
- Introduction.
- Detecting patterns and identifying processes.
- Top-down versus bottom-up.
- Multitrophic interactions.
- Population cycles.
- Conclusion.
Abstract
population dynamics is the study of changes in the number of organisms in populations and the factors influencing these changes. It thus, by necessity, includes the study of the rates of loss and replacement of individuals and of those regulatory processes that can prevent excessive changes in those numbers. A wide variety of factors can affect the population dynamics of a particular species. These can be divided roughly into two categories. First, the extrinsic or environmental influences on populations, such as temperature, weather, food supply, competitors, natural enemies, diseases, and all possible combinations of the preceding; and second, the interactions between members of the same populations, be these direct or indirect, e.g., intraspecific competition, behavioral processes, and aggregation.
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