How does population density differ from population size?
Population size refers to the total number of individuals of a particular species in a given area or habitat. It is a measure of the actual number of individuals present in a given population.
Population density, on the other hand, refers to the number of individuals of a particular species living per unit area or per unit volume in a specific habitat. It is a measure of how tightly or loosely the individuals in a particular population are packed together or distributed in a given habitat.
In summary, population size indicates the number of individuals in a population, while population density indicates how closely packed those individuals are in a given habitat.
Population size refers to the total number of individuals in a particular population, while population density refers to the number of individuals per unit area or volume. In other words, population density takes into account the spatial distribution of individuals within a given area.
For example, if two cities both have a population of 100,000 people, but City A covers an area of 10 square kilometers while City B covers an area of 5 square kilometers, City B would have a higher population density because it has more people per unit of area.
Population size alone does not provide information about how spread out or concentrated the individuals are within a given area, whereas population density takes into consideration both the population size and the area over which it is spread.