Population Dynamics and Trophic Levels

These flashcards cover key concepts related to population dynamics, including density-dependent and density-independent factors, and the effects of trophic levels.

Density-dependent factors

Factors that limit population size by reducing individual survival as the population increases.

Negative feedback

Feedback mechanisms that limit population growth.

Competition for resources

The struggle between individuals for limited resources, which can impact survival and reproduction.

Density-independent factors

Factors affecting population size that do not depend on the number of individuals in the population.

Bottom-up regulation

Population control that occurs when changes in lower trophic levels affect higher trophic levels.

Top-down regulation

Population control resulting from changes in higher trophic levels impacting lower trophic levels.

Biomass

The total mass of organisms in a given area or volume, which can impact population dynamics.

Intrinsic factors

Internal physiological factors affecting individual survival and reproduction.

Trophic levels

The levels of a food chain or food web where organisms are classified based on their primary energy source.

Environmental factors

External conditions, such as temperature and precipitation, that influence individual survival and population growth.