Gray wolves reintroduced into Yellowstone
  • Gray wolves were reintroduced into Yellowstone National Park in 1995, resulting in a trophic cascade through the entire ecosystem. After the wolves were driven extinct in the region nearly 100 years ago, scientists began to fully understand their role in the food web as a keystone species.

  • Term Part of Speech Definition Encyclopedic Entry
    conservation Noun

    management of a natural resource to prevent exploitation, destruction, or neglect.

    Encyclopedic Entry: conservation
    ecology Noun

    branch of biology that studies the relationship between living organisms and their environment.

    Encyclopedic Entry: ecology
    food web Noun

    all related food chains in an ecosystem. Also called a food cycle.

    Encyclopedic Entry: food web
    reintroduce Verb

    to return members of a species to their historical range.

    Yellowstone National Park Noun

    large national park in the U.S. states of Wyoming, Idaho, and Montana.