calorifier (kÉËlÉrÉªËfaÉªÉ). 1  a water tank fitted with a coil, or coils, that can be heated in order to heat the water â â  The pressurised water supply is cold only: a calorifier is available at extra cost. Usage examples. 2  Trends. 3  a water tank fitted with a coil, or coils, that can be heated in order to heat the water â â  The pressurised water supply is cold only: a calorifier is available at extra cost.
In ecology, a population consists of all the organisms of a particular species living in a given area. For instance, we could say that a population of humans lives in New York City, and that another population of humans lives in Gross.
An ecosystem contains one or more communities of living organisms. A community is all the organisms living together in a certain area. Each community has species of animals, plants and other organisms that live together.All the organisms of one species in a community are called a population.To describe a community you need to know the kinds of populations that are present.You need to know the size of the population.ach community has species of animals, plants and other organisms that live together.All the organisms of one species in a community are called a population. To describe a community you need to know the kinds of populations that are present. You need to know the size of the population.