LANDIS II biomass succession model (LANDIS-II-BSM) has been proven a great tool to simulate forest changes with alteration of management practices, disturbance regime and climate. We rebuilt LANDIS-II-BSM in R environment on the SpaDES platform (LANDIS-II-BSM-R), motivated by increasing strengths of R such as data manipulation, statistics, spatial analyses and bug detection. The recoded LANDIS-II-BSM-R had great agreement with the original model in terms of growth, mortality and regeneration. We further revised LANDIS-II-BSM-R to allow concurrent growth and mortality, for which the original model handle them sequentially.
The simulated aboveground biomass from revised model has 0.03% ~ 0.05% differences from that using original model. The revised LANDIS-II-BSM-R had higher simulation efficiency than the original model, as indicated by shorter simulation time and better scalability. We concluded that the revised LANDIS-II-BSM-R can be a great replacement of original biomass succession model in LANDIS II.