an ecosystem
a community.
the population is the amount of people living in that area
organism
2 or more populations living in the same area at the same time is a community.
members of a same species living in a particular area at a same time constitute population as no of cats in an area,no of rats in rice field,no of students in biology class of semester 2012,human population in a city...... and all thwe populations living in an area makes a community.
The group of all populations in an area is community. Niche is everything an organism occupies in an ecosystem- for example, place to live, food, mates, etc.A community is a group of different populations living together in one area.
species.
Group of one species living together is called population. Group of populations living in an area is called community. Group of populations living in an area plus the environment around them is called ecosystem.
The collection of all populations of species in an area is the community.
Several groups of populations in an area/habitat is called a community.
community
A Community.Several populations make up a community. Communities interact with the non-living world around and make up an eco-system.