Temporal distribution of insect biomass at selected locations.

<p>(A) Daily biomass (mean ±1 se) across 26 locations sampled in multiple years (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0185809#pone.0185809.s009" target="_blank">S4 Fig</a> 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).</p

Posterior parameter estimates of the final mixed effects model of daily insect biomass.

<p>For each included variable, the corresponding coefficient mean, standard deviation and 95% credible intervals are given. P-values were calculated empirically based on posterior distributions of coefficients.</p

Overview of covariates included in each of the seven models.

<p>The year covariate yields the annual trend coefficient.</p

Marginal effects of temporal changes in considered covariates on insect biomass.

<p>Each bar represents the rate of change in total insect biomass, as the combined effect of the relevant coefficient (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0185809#pone.0185809.t004" target="_blank">Table 4</a>) and the temporal development of each covariate independently (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0185809#pone.0185809.s007" target="_blank">S2</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0185809#pone.0185809.s008" target="_blank">S3</a> Figs).</p

Overview of malaise-trap samples sizes.

<p>For each year, the number of locations sampled, the number of location re-sampled, total number of samples, as well as mean and standard deviation of exposure time at the trap locations (in days) are presented.</p

Temporal distribution of insect biomass.

<p>(A) Boxplots depict the distribution of insect biomass (gram per day) pooled over all traps and catches in each year (n = 1503). Based on our final model, the grey line depicts the fitted mean (+95% posterior credible intervals) taking into account weather, landscape and habitat effects. The black line depicts the mean estimated trend as estimated with our basic model. (B) Seasonal distribution of insect biomass showing that highest insect biomass catches in mid summer show most severe declines. Color gradient in both panels range from 1989 (blue) to 2016 (orange).</p