Simulation · Biology · Class 12
The rivet popper hypothesis
"The rivet popper hypothesis" is a free, interactive Class 12 Biology simulation for NEET, built on the lesson "Diversity and ecosystem stability" in Biodiversity and Conservation. The plane is an ecosystem and each rivet a species. Tap grey rivets in the cabin (seats and windows) or dark rivets on the wings to pop them, and watch the plane's strength. Each extinction weakens the ecosystem a little; many together make it dangerously weak, and losing a key species does the most harm.
From the lesson Diversity and ecosystem stability in Biodiversity and Conservation. Change the values and watch what happens.
The rivet popper hypothesisBiology · Class 12
The idea behind it
NCERT §13.1.3
- Whether the number of species matters to how an ecosystem works is a question ecologists have not answered definitively. For decades they held that species-rich communities tend to be more stable.
- A stable community does not vary too much in productivity from year to year, is resistant or resilient to occasional natural or man-made disturbances, and resists invasion by alien species.
- David Tilman's long-term experiments on outdoor plots gave tentative answers: the richer a plot was in species, the less its total biomass varied from one year to the next.
- In the same experiments, greater diversity also raised productivity.
- Rich biodiversity is essential for ecosystem health and imperative for the survival of humans, even though exactly how richness helps is not fully understood.
- Paul Ehrlich's rivet popper hypothesis: an airplane (the ecosystem) is held together by thousands of rivets (species). Passengers popping rivets one by one (extinctions) may not affect flight safety at first, but the plane grows dangerously weak as more go.
- Which rivet goes also matters. Rivets on the wings stand for key species that drive major ecosystem functions; losing them is far more serious than losing a few from the seats or windows.
Questions
2 answers
- What does the "The rivet popper hypothesis" simulation show?
- The plane is an ecosystem and each rivet a species. Tap grey rivets in the cabin (seats and windows) or dark rivets on the wings to pop them, and watch the plane's strength.
- Is this simulation free?
- Yes. It is free and runs in the browser on a phone or a laptop. It belongs to the lesson "Diversity and ecosystem stability" in Biodiversity and Conservation (Class 12 Biology).
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