- a self contained, interacting communtiy of organisms and the environment which they live and interact in.
all organisms of all different species living in a particular habitat Population - a group of organisms of the same species living in the same place at the same time Habitat - place in which an organism lives Niche - An organism's role in the ecosystem Producer -
obtains food from inorganic sources from photosynthesis
- autotrophic organism
obtains food in organic form directly or indirctly
- heterotrophic organism
Trophic level - the level in a food chain at which an oranism feeds