Study reports more than 75% decline in flying insect biomass in German protected areas
Dated 18 October 2017: Study reports more than 75% decline in flying insect biomass in German protected areas. In the causal graph this event weakens the driver Biodiversity Loss.
Who was responsible
Contribution type and responsibility level for each recorded actor — not sole-author shorthand.
No public contributors are listed for this fact.
What changed
Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.
- FactStudy reports more than 75% decline in flying insect biomass in German protected areas
- weakensDriverBiodiversity Loss
provisional weight · verified
Causal path
How this event connects to drivers and indicators in the graph.
- FactStudy reports more than 75% decline in flying insect biomass in German protected areas
- weakensDriverBiodiversity Loss
Cite this page
Factrail. (2026). Study reports more than 75% decline in flying insect biomass in German protected areas. Factrail. https://factrail.ai/facts/hallmann-german-insect-biomass-decline-2017
https://factrail.ai/facts/hallmann-german-insect-biomass-decline-2017
Accessed 16 October 2026.
By the Factrail desk · Method: how we source and score · Last reviewed
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