Trophic levels = Energy flow: Producers → Herbivores → Carnivores → Top predators.
A trophic level represents the position of an organism in the food chain based on its source of energy.
Different types of trophic levels in an ecosystem include:
Two important characteristics for estimating any population of animals and plants are \(\underline{\hspace{2cm}}\) and \(\underline{\hspace{2cm}}\) of individuals.
Demography is the study of factors that affect \(\underline{\hspace{2cm}}\) and \(\underline{\hspace{2cm}}\) patterns.