a negative trendP < 0.05
In contrast, density had a negative trend ( P < 0.05; table S1), with a total decrease from 6.05 ± 0.53 to 4.24 ± 0.62 colonies/400 cm 2 (mean ± SE; Fig. 1A ).
In contrast, density had a negative trend ( P < 0.05; table S1), with a total decrease from 6.05 ± 0.53 to 4.24 ± 0.62 colonies/400 cm 2 (mean ± SE; Fig. 1A ).
To assess whether each population has undergone a significant trend over time, we fitted a linear regression model for each demographic trait using the traits as response variables and time as the explanatory variable.