what is symbiosis in biology

What does symbiosis mean?
What does mutualism mean in symbiosis?
What does commensalism mean in symbiosis?
What does parasitism mean in symbiosis?
What does predation mean in symbiosis?
What does competition mean in symbiosis?


Earth System
Food Waste
Genetic Engineering
Natural Resources
Ocean Acidification
Ozone Depletion
Waste Water

Water Scarcity


Symbiotic Relationship

In our ecosystem lesson, we learned about the wonderful relationship between living things and their environment. Particularly, we learned that abiotic factors (physical or non-living factors) are a key part of ecosystems. But there would be no ecosystem without the biotic factors (living things). For living things to continue existing, they need to interact among their own species, and with each other species to find food, shelter, space, and so on. In this lesson, we will look at interactions among biotic factors (living things) in an ecosystem.
Many living things depend on each other (same species), or other living things (different species) to survive. Sometimes these relationships can be temporal or permanent. These relationships could be partnerships with animal species, plants and also with microorganisms. 

The biological word for different species of organisms living closely together in order to survive is Symbiosis. Note that symbiosis refers to relationships between species in which at least one member of the relationship benefits. In short, Symbiosis means “Living Together”
 type of symbiosis commensalism
Whenever two living things or species live together in a symbiotic partnership, five things may happen:

types of symbiosisBoth parties can benefit from the partnership.
types of symbiosisOne party can benefit whiles the other does not care or not harmed.
types of symbiosisOne party benefits at the expense of the other (the other loses or is harmed).
types of symbiosisOne party targets and consumes the other party
types of symbiosisBoth parties may compete for limited resources to survive
The biological terms to describe all five symbiotic scenarios are Mutualism, Commensalism, Parasitism, Predation, and Competition. 
Now we shall look at Mutualism as a Symbiotic Relationship.

next page on symbiotic relationships