3 types of symbiosisi) commensalism - epizoics and epiphytes
Commensalism - interaction between one organism (commensal) benefits and the other (host) neither benefits nor harmed
Epizoics - animals which live as commensals on the outside of other animals
Epiphytes - plants which grow on the surface of other plants to obtain sunlight and air (do not absorb food)
A shark and remora fish.The remora fish attaches itself to the shark to get a free ride, protection and scraps of food left by the shark. The shark does not benefit from this relationship.
Example of the epiphyte : Bird's nest fern
Parasitism is an interaction between two organisms in which one organism (parasite) benefits and the other (host) is harmed.
Ectoparasites - parasites which live on the outside of the host
Endoparasites - parasites which live inside their hosts
Louse (lice pl.) sucks blood from the host
The host suffers from malnutrition.
Mutualism - an interaction between two organisms in which both benefit
Sea anemone and hermit crab.Sea anemones usually attach themselves onto the shell of a hermit crab. They get free rides and leftover food. The hermit crab receives protection against predators from sea anemones.
Saprophytism - a type of interaction in which a living organism obtains food from the dead and decaying remains of other organisms
Saprophytes - plants which feed on decaying matter
Saprozoic - animals which feed on decaying organic matter
Prey-predator - interaction between a predator which hunts and eats another animals (prey).
An eagle and a rat.Competition
Intraspesific - among the same species
Interspecific - among different species