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More than 75 percent decline over 27 years in total flying insect biomass in protected areas

Fig 4

Temporal distribution of insect biomass at selected locations.

(A) Daily biomass (mean ±1 se) across 26 locations sampled in multiple years (see S4 Fig for seasonal distributions). (B) Distribution of mean annual rate of decline as estimated based on plot specific log-linear models (annual trend coefficient = −0.053, sd = 0.002, i.e. 5.2% annual decline).

Fig 4

doi: https://doi.org/10.1371/journal.pone.0185809.g004