What effect does the loss of a species have on an ecosystem

What effect does the loss of a species have on an ecosystem (all living organisms and natural features in an area)?

After all, most species have become extinct during the history of life on Earth.
As you explore this week’s resources, you look at how the loss of one species can affect the survival of other species. Biologists who study ecology have discovered that the decrease or loss of some species has a much greater impact on an ecosystem than the decrease or loss of other species. Species that have a stronger influence within their ecosystems are known as keystone species.

Post in paragraphs as follows:

• Describe the endangered or threatened species you have selected. Include where the species lives.
• Discuss whether you think this species is important or worth saving.
• Explain why or why not.
• Explain what determines the worthiness of a species.