Much of classic ecological theory (e.g., natural selection, niche separation, metapopulation dynamics) has focused on negative interactions such as predation and competition, but positive interactions (facilitation) are receiving increasing focus in ecological research.
Meget af klassisk økologisk teori (fx naturlig selektion, niche-separation, metapopulationen dynamik) har fokuseret på negative interaktioner såsom prædation og konkurrence, men positive interaktioner (facilitation) modtager stigende fokus på økologisk forskning.