How the change works
- 01 / Public decision
Evaluation before surgery
- 02 / Physical change
Ecological relationships considered
- 03 / Possible outcome
Reduced unexpected risks
A species can perform multiple functions. Deciding without considering ecological relationships can produce unexpected consequences.
Research and local documents ↓What the evidence tells us
A working paper from 2025 analyzes the 1958 Chinese campaign against sparrows and the possible consequences on crops. It is a research track on the risks of intervening without knowing the ecosystem.
Putting the choices into practice
Species
The challengeAlleged damage only
The responseMultiple roles
Decision
The challengeGeneralized campaign
The responseTests and monitoring
Certainty
The challengePreliminary estimate treated as fact
The responseClearly stated research status
The diagram compares choices and conditions for putting them into practice. Measured outcomes and their limits are discussed in the evidence.
Research and local documents ↓Conditions and limits
This is a working paper, not a consolidated consensus. The famine had many causes: it is not attributed here to a single campaign.
Other possible benefits
Safer decisions when the effects can spread through the ecosystem.
Research and local documents
- Local document and reported findingBFI Working Paper 2025-98 · campaign against sparrows and famine ↗
Research on the case, mechanism, or measures discussed in the sheet.
