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  • Vertebrate Declines and the Sixth Mass Extinction

    Vertebrate Declines and the Sixth Mass Extinction

    Data Point

    In this study, researchers measured species population declines on a global scale that may contribute to the sixth mass extinction.

  • Predator-Prey Relationship Dynamics

    Predator-Prey Relationship Dynamics

    Data Point

    In a study in Greenland, scientists examined whether changes in population densities of Arctic fox are related to changes in population densities of its main prey, the lemming.

  • Population Dynamics

    Population Dynamics

    Click & Learn

    Explore the exponential and the logistic growth mathematical models that describe how population changes with time.

  • Film Guide for Some Animals are More Equal than Others

    Film Guide for Some Animals are More Equal than Others

    Film Guide

    The following classroom-ready resources complement the film Some Animals Are More Equal Than Others: Trophic Cascades and Keystone Species. It tells the story of the bold experiments by Robert Paine and James Estes, which established the importance of keystone species in regulating ecological communities and the cascades of effects set in motion by their removal.

  • Using Genetic Evidence to Identify Ivory Poaching Hotspots

    Using Genetic Evidence to Identify Ivory Poaching Hotspots

    Data Point

    A team of scientists analyzed the DNA from seized ivory to determine where the ivory from poached elephants came from.

  • Survey Methods

    Survey Methods

    Click & Learn

    In this interactive, students explore the methods scientists use to survey elephants and learn about the current state of the elephant population in Africa.

  • The Great Elephant Census

    The Great Elephant Census

    Scientists at Work

    (8 min 23 sec) How many African elephants are left and where are they? This video follows the work of researchers conducting the first census of African savanna elephants in over 40 years and the methods they are using to obtain accurate, up-to-date numbers across the continent. 

  • Some Animals Are More Equal than Others: Keystone Species and Trophic Cascades

    Some Animals Are More Equal than Others: Keystone Species and Trophic Cascades

    Short Film

    (19 min 29 sec) Keystone species and trophic cascades are fundamental concepts in ecology. This short film tells the story of how these concepts were first established through the pioneering experiments of two young researchers: Robert Paine and James Estes.

  • Liz Hadly Tracks the Impact of Climate Change in Yellowstone

    Liz Hadly Tracks the Impact of Climate Change in Yellowstone

    Scientists at Work

    (7 min 28 sec) Ecosystems in the world-famous national park are threatened by warming temperatures.

  • Gorongosa Timeline

    Gorongosa Timeline

    Click & Learn

    A highly visual interactive timeline for exploring the history of Gorongosa National Park, from its beginnings as a hunting reserve and decline in the wake of a civil war, to its return to being one of the world’s foremost wildlife treasures and case studies in conservation biology.  

  • Gorongosa: Restoring Mozambique’s National Treasure

    Gorongosa: Restoring Mozambique’s National Treasure

    Activity

    This article by Gorongosa National Project staff explains the project’s history, mission, and future goals.

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