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.
Key. A population is a summation of all the organisms of the same group or species, which live in a particular geographical area, and have the capability of interbreeding. In ecology, the population of a certain species in a certain area is estimated using the Lincoln Index.he population of some countries, such as Nigeria, is not even known to the nearest million, so there is a considerable margin of error in such estimates. Researcher Carl Haub calculated that a total of over 100 US billion/100 000 million people have probably been born in the last 2000 years.