Table 1. Changes in species group cover over time
Estimated lmer modeled slopes of changes in cover (‘plot hits’) of species groups with respect to pre-treatment (2006) cover per year over the 15 year period. Mixed models predicted the change in plot cover per year with a fixed interaction term of species group x treatment type x treatment duration (years since 2006) with a random intercept of calendar year and a global intercept of zero to determine if changes were positive or negative over time. P values were estimated using the package lmerTest in R (Kuznetsova et al. 2017)with 0.109 SE and 937.7 df for all species groups and treatments.