a significant trendp < 0.001
The probability of finding a significant trend for a population increased with the monitoring duration (Binomial regression, B = 0.015, 95% CI = [0.007, 0.022], χ 2 = 15.47, p < 0.001; Figure S3a ).
The probability of finding a significant trend for a population increased with the monitoring duration (Binomial regression, B = 0.015, 95% CI = [0.007, 0.022], χ 2 = 15.47, p < 0.001; Figure S3a ).
In general, we find a positive trend for the Polychaeta, whereas the Bivalvia remain neutral.
The Equisetopsida (horsetails, five families) showed neutral trends over time, whereas Liliopsida (including grasses, three families) shifted from a positive to a negative trend in the early 2000s (Figure 7a ).
When using absolute slopes (i.e., the direction of signs removed), the overall slope showed a highly significant deviation from 0 (Table 1 ), reflecting the large weighted proportion of significant trends.