Question

What is the difference between a species and a population?

Answer 1

Hint: The terms ‘population’ and ‘species’ are not interchangeable; they are very much distinct. In Ecology, there are two basic stages of classification for all the organisms; population or species. If we understand ‘population’ and ‘species’ definitions, a large part of the difference can be found.

Complete answer:
In brief, a population is all of the members of a species in one ecosystem or area, while a species is a specific unique form of organism in the entire biosphere. The biggest difference is in the scales between each.

Population	Species
(i) We can say that a population is a community of organisms belonging to the same species that live in the same place.	(i) Then a species will be the smallest (in size) group of organisms with characteristics that are sufficiently similar to enable them to produce offspring and reproduce successfully.
(ii) Within any given location, there may be more than one population.	(ii) There are some environments where only a certain species will be found, so multiple species are not always there.
(iii) Example: In the same location as a population of Saguaro Cacti, a population of Cactus Wrens, and a population of Bark Scorpions, there could be again another population of Saguaro Cacti, Cactus Wrens, and a population of Bark Scorpions.	(iii) Example: A plant, animal, bacteria, fungus, or some other living thing may be classified as a species.While a Saguaro Cactus is a specific type of plant species, a Cactus Wren is another particular bird species, similarly a Bark Scorpion is a completely distinct insect species.
(iv) Then a population will be only set of a particular species that lives in a specific area, so the Field Mice population in Iowa is different from the Field Mice population in Africa.	(iv) Field mice are those species which may be found in Iowa as well as in Africa.

Note: The biosphere is made up of all the areas on the earth where life can be found, it is filled with the population of different species. From the deepest root systems of trees to the dark world of ocean trenches, green rain forests, and high mountaintops, the biosphere encompasses everything. For around 3.5 billion years, the biosphere has existed.