The Big Questions: What Is a Keystone Species?

What is a keystone species—and how can one animal hold an entire world together?

Hi, my name is Ethan Solace—I’m an interdisciplinary psychologist and a dad—and this book was written to help curious young minds see nature in a whole new way: as a living web where everything is connected… and where a single “keystone” can keep the entire system standing.

In The Big Questions: What Is a Keystone Species?, readers (ages 5–12) explore the real, jaw-dropping truth about ecosystems, biodiversity, and the surprising animals that shape forests, rivers, oceans, and grasslands. From predators that change landscapes to tiny builders that create homes for hundreds of species, this is environmental science made cinematic, clear, and unforgettable.

Inside you’ll discover:

• What a keystone species is (and why the “stone arch” idea makes it instantly click)

• How wolves can transform an ecosystem—right down to the shape of rivers

• Why beavers are nature’s engineers, building wetlands that support countless animals

• How coral reefs act like living cities beneath the sea

• Why sea otters protect kelp forests (and what happens when they’re gone)

• How elephants reshape habitats, create pathways, and even help other species survive

• The big question: Can humans choose to become a keystone species—for good?

Perfect for: parents, teachers, homeschooling, STEM learning, classroom discussions, nature lovers, animal fans, and kids who ask why (and don’t stop).

If you’re looking for an ecology for kids book that builds real understanding of ecosystems, food webs, conservation, and environmental science—this is the one that sticks.

What happens to the web of life when a keystone disappears… and what can we do before it’s too late?