Living in the same habitat, organisms of same species form
population
A population is a group of individuals of a species (same species) growing in a given area (same habitat).
Biosphere - The biosphere also known as the ecosphere, is the worldwide sum of all ecosystems.
Community - all the organisms that live together in a particular area.
Niche - The function or position of a species within an ecological community. A species's niche includes the physical environment to which it has become adapted as well as its role as producer and consumer of food resources.