How are community population and ecosystem similar?

in a community there are people right? well in an ecosystem there are animals and organism.

when it's short and dry.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.