Exploring Population Ecology Fundamentals

What defines a population in ecology?

• A single organism in its natural habitat

• A group of the same species in the same area at the same time

• All organisms in a biome

• A group of different species in the same area

Which factor has a positive influence on population size?

• Natural disasters

• Emigration

• Births

• Deaths

What is the main difference between immigration and emigration?

• Immigration decreases a population, emigration increases it

• Immigration involves animals, emigration involves plants

• Immigration is movement into a population, emigration is movement out

• There is no significant difference

What is the purpose of marking animals in the mark and recapture method?

• To estimate the population size

• To track their migration patterns

• To identify their species

• To monitor their health

Why is quadrat sampling suitable for immobile organisms?

• Because it accurately counts fast-moving organisms

• Because it requires less time

• Because it can accurately estimate populations in a defined area

• Because it's cheaper than other methods

What does carrying capacity refer to?

• The total area an ecosystem covers

• The maximum population size an ecosystem can sustain

• The maximum number of species an ecosystem can support

• The maximum population size that can leave an area

What role does environmental resistance play in population growth?

• It limits population growth by restricting resources

• It has no effect on population size

• It increases the carrying capacity

• It promotes unlimited growth

Which factor is density-independent?

• Disease

• Predation

• Competition for food

• Natural disasters

How does predation relate to density-dependent factors?

• Predator numbers decrease as prey population decreases

• Predator numbers increase as prey population increases

• Predator numbers are unaffected by prey population

• Predator numbers decrease as prey population increases

Why do populations not exceed their carrying capacity for long periods?

• Due to environmental resistance limiting resources

• Because of increased emigration

• Because of constant immigration

• Due to unlimited resources