Environmental drivers of tree extinction and recruitment
The effects of climate and soil on the number of recruited and extinct
species were estimated using GLMM, including site as a random effect. We
used Poisson family and included the natural logarithm of the
multiplication between site sampled area and census interval length as
an offset variable to control for their effects on the species count.
y ~ MAP+MAT+Year +pH+P+K+Ca+Mg+Al+SOM+sand% (eqn
2)
Equation 2 describes the global model of the effects of environmental
variables on the number of extinct and recruited species, with all
variables included in the R notation. Note that y is the number of
extinct and number of recruited species.