Predator Loss and Ecosystem Effects
Quantify energy transfer efficiency through trophic levels (~10% rule); explain trophic cascades: how removing an apex predator triggers a chain of ecosystem changes (sea otters → sea urchin explosion → kelp forest collapse); define 'fishing down the food web'; evaluate evidence for ocean rewilding — shark reintroduction, whale recovery driving nutrient cycling; understand why ecosystem-based fisheries management is needed
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Predator Loss and Ecosystem Effects means practising the idea at the table with a simple hands-on check. We will demo once, then your child tries.
Materials: A battery, bulb, and wires OR a warm/cool cup comparison setup; Paper for a simple energy-path note. 1. Say the goal of Predator Loss and Ecosystem Effects in plain words once. 2. Adult shows one energy transfer (circuit lights, or heat moving to a cooler hand nearby) and names the path. 3. Child traces or describes three energy paths and says what changed. 4. Fresh check: one fresh energy-path description. Record and stop. Done: three energy-path notes with a before/after change. Proof: parent note of examples and results. Stop: End after the fresh check; keep optional challenge for another day.
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Learning resources
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NASA Climate Kids · Practice link — not the full lesson
Ocean
Before you open · source notes
Ocean supports Predator Loss and Ecosystem Effects. An adult previews and guides; this is a learning page, not a scored quiz.
Free educational page, no sign-in required for the tested path.
Before you openAsk the learner one fact they learned and one question they still have.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public NASA Climate Kids page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
NASA Climate Kids. “Ocean.” External page; Gakuva does not copy, host, embed, or redistribute materials.
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“Can your child trace the chain of events that happened to Pacific kelp forests when sea otters were hunted almost to extinction — what domino effect did removing one species set off through the whole ecosystem?”
Curriculum record
- Type
- Conceptual
- Subject
- Science
- Domain
- Ocean Life
- Age range
- Ages 12–14