
Concept explainers
To discuss:
Examples in which one species has evolved characteristics that affect its interactions with a different species.
Introduction:
An ecological community consists of populations of different species living in the same area. When different species live together they have to interact with each other. This is called interspecific interactions. These interspecific interactions may have positive effects, negative effects or it may be neutral for one of the participants or for both. The major types of interspecific interactions are
- - Mutualism − positive effects on both species
- Predation − positive on one species, negative on other species
- Commensalism − positive on one species, neutral on the other species
- Amensalism− neutral on one species and negative on the other species
- Competition − negative on both species

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Chapter 1 Solutions
EBK PRINCIPLES OF BIOLOGY
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