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.