Population Interactions

The video explores interspecific interactions among species, including predation, competition, parasitism, commensalism, mutualism, and amensalism. Each interaction type is explained with examples, highlighting their ecological roles and effects on species involved. Predation involves one species preying on another, while competition occurs when species vie for the same resources. Parasitism benefits the parasite at the host's expense. Commensalism benefits one species without affecting the other, and mutualism benefits both. Amensalism harms one species without affecting the other.

Which type of interspecific interaction benefits both species involved?

• Amensalism

• Commensalism

• Mutualism

• Parasitism

What role do predators play in an ecosystem?

• They increase prey population

• They have no effect on prey species

• They reduce species diversity

• They transfer energy across trophic levels

Which of the following is an example of intraspecific competition?

• Small fishes and ducks competing for zooplankton

• Barnacles attaching to mollusk shells

• Flamingos fighting over food in a lake

• Cheetahs and lions competing for prey

What is the relationship called when one species benefits and the other is unaffected?

• Parasitism

• Mutualism

• Commensalism

• Amensalism

Which of the following is an example of brood parasitism?

• A lion hunting a zebra

• Cuckoo laying eggs in another bird's nest

• Lichens forming a symbiotic relationship

• Barnacles attaching to a whale

In which interaction does one species harm another without benefiting itself?

• Mutualism

• Amensalism

• Parasitism

• Commensalism

Which of the following is an example of mutualism?

• A tapeworm in a human intestine

• A remora fish attaching to a shark

• A fungus and an alga forming lichens

• A black walnut tree inhibiting other plants