SME
Ecology · Problem type
Name the interaction
Use this for “Barnacles ride on a whale, which is neither helped nor harmed. What kind of interaction is this?”
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Which interaction is each pair?
Tap a card, then tap its group.
Ask how each species fares: better off, worse off or unaffected.
Assumptions
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Each sign is one species’ outcome: + it gains, − it is harmed, 0 it is unaffected.
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A predator kills and eats its prey; a parasite feeds on a living host, usually without killing it.
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Competitors both lose: each uses up food, light or space the other needs.
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