| oppositional relationship(expression, relationship, ecology, community) |
| symbiotic relationship(expression, relationship, ecology, community) |
| close ecological relationship(expression, feature, relationship, ecology) |
| complex ecological relationship(expression, feature, relationship, ecology) |
| competition(noun, organism, relation, oppositional) |
| commensalism(noun, organism, relation, oppositional) |
| kind of ecological relationship(expression, feature, relationship, ecology) |
| mutualism(noun, organism, relation, oppositional) |
| parasitism(noun, organism, relation, oppositional) |
| predation(noun, organism, relation, oppositional) |
| special ecological relationship(expression, feature, relationship, ecology) |
| competitive exclusion principle(expression, nature, relation, competition, oppositional) |
| ecological relationship of humanity(expression, feature, relationship, ecology) |
| herbivore-plant predation(expression, nature, relation, predation, oppositional) |
| interspecies competition(expression, nature, relation, competition, oppositional) |
| intraspecies competition(expression, nature, relation, competition, oppositional) |
| predator-prey relationship(expression, relation, competition, oppositional) |
| shifting ecological relationship(expression, feature, relationship, ecology) |
| true ecological relationship(expression, feature, relationship, ecology) |