Species - a group of genetically related individuals that can breed to produce fertile young. The individuals are not necessarily members of the same species. Population - a group of same species that interact with one another and reside in the same location.
Community - a population comprised of different species that interact with one another and reside in the same location. Ecosystem - includes all non-living aspects and the living population of the environment. It comprise both abiotic and biotic factors in the area.
Levels of organization in ecosystem: 1.Individuals or organisms 2.Population- A group of organisms of a given species that live in a specific area at a given time 3.Comunity- All of the populations of different species that live in the same area and interact with one another 4. Ecosystem- Community (biotic) interacting with the environment (abiotic)5.Biome- A group of ecosystems sharing similar characteristics 6. Biosphere-The sum of all the ecosystems established on planet Earth.