Population Interactions

Species A

Species B

Name of Interaction

Examples

+

+

Mutualism

  • Lichens: Fungus+ cynobacteria
  • Mycorrhizae: Fungus+ roots of higher plants
  • Interaction of plants and pollinators like bees and fig tree and wasps.

-

-

Competition

  • Consumption of Nitrogen by plants making it unavailable for other plants.

+

-

Predation

  • Wolves (Predator) — Rabbits (Prey)
  • Venus fly trap plant(Predator) — Insects (Prey)

+

–

Parasitism

  • Ecto parasites: Feed on the external surface of the host organism. E.g. lice on humans and ticks on dogs, ; ectoparasitic copepods affecting marine fish; Cuscuta, a parasitic plant commonly found growing on hedge plants, has lost its chlorophyll and leaves and derives its nutrition from the host plant.
  • Endo parasites: Live inside the host body at ....
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