Question

Give a broad outline of various types of positive interactions among organisms.

Answer 1

Positive interactions among organisms involve relationships where one or both species benefit. These include:

1. Commensalism: One species benefits while the other is neither helped nor harmed.
   Example: epiphytes growing on trees.
2. Proto-cooperation: Both species benefit, but the association is not essential for survival.
   Example: hermit crab and sea anemone.
3. Mutualism (Symbiosis): Both species benefit, and the association is more or less obligatory for survival.
   Example: lichens and mycorrhizae.

These interactions enhance the survival, growth, and reproduction of the species involved, fostering ecosystem stability.