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🌲 Ecology

Discover how organisms, energy, and environments connect into living systems.

lessons

~30 min

to learn

🔬 Science

subject

Teens

level

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What you’ll learn

Define ecology, ecosystems, energy roles, and the concepts of habitat and niche.Ecology studies interactions among organisms and their environment across levels from individuals to the biosphere. Ecosystems combine biotic and abiotic factors, energy flows from producers to consumers to decomposers, and habitat and niche describe where and how organisms live.
Explain food chains, food webs, trophic levels, and nutrient cycling.Food chains and interconnected food webs show how energy flows through trophic levels, with about 10 percent passing to each higher level. Unlike energy, matter such as carbon, nitrogen, and water is recycled through nutrient cycles.
Analyze population dynamics, species interactions, keystone species, and conservation.Populations grow toward a carrying capacity shaped by resources and interactions like competition, predation, and symbiosis. Keystone species have outsized effects, and understanding ecology guides efforts to protect biodiversity and ecosystems.

Questions this course answers

What does ecology study?

Ecology is the study of interactions among organisms and between organisms and their physical environment.

Which organisms form the base of most food chains?

Producers capture energy from sunlight through photosynthesis and form the base of nearly all food chains.

How do a habitat and a niche differ?

A habitat is the physical place an organism lives, while a niche describes its full role in the ecosystem.

How is a food web different from a food chain?

A food web shows the many overlapping feeding links in an ecosystem, unlike a single linear food chain.

About how much energy typically passes from one trophic level to the next?

On average only about 10 percent of energy transfers to the next trophic level; the rest is lost, mostly as heat.

What is recycled through ecosystems rather than lost like energy?

Matter is cycled repeatedly through nutrient cycles, while energy flows through and is ultimately lost as heat.

Grounded in trusted sources

Britannica, Trophic Level (britannica.com/science/trophic-level)
National Geographic, Ecology and Ecosystems Resource Library (education.nationalgeographic.org)
Molles, Manuel C., Ecology: Concepts and Applications (McGraw-Hill, 2018)
U.S. National Park Service, Yellowstone Wolf Restoration (nps.gov/yell)
Applied Ecology, NC State University Pressbooks, Chapter 10: Food Webs (ncstate.pressbooks.pub)

Every Wunder lesson is built from real, reputable sources — never invented.

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