Species productivity
We fitted LMM to estimate the influence of biotic (mean individual size,
wood density and climatic niche) and abiotic variables (atmospheric
CO2, MAP and MAT) on species AGWB productivity. We
included site, census interval, family, genus and species as random
effects. We also tested the interactions between environmental variables
(CO2, MAP and MAT) and species attributes (mean individual size, wood
density and niches) on productivity.
species productivity ~ (MAP+MAT+ Year) * (mean
ind. size + niche bio 1+ niche bio 12) + WD (eqn 4)
Equation 4 describes the global model of species AGWB net productivity,
with all variables included in the R notation. Additive and interaction
effects are represented respectively by “+” and “*”.