Simulation model of hourly dynamics of organic matter carbon in herbaceous vegetation communities ECOGRASS

Abstract

An algorithm has been developed for the simulation model of carbon behavior in herbaceous communities of various
types, both autonomous and being a part of complex phytocenoses. Th e infl uence of external factors is taken
into account such as solar radiation, precipitation, air temperature, clouds, wind speed, etc. Th e dynamics of soil
humidity and temperature are reproduced. Depending on the discreteness of consideration of the simulated processes,
the algorithm can be modifi ed. Th e algorithm was tested in modeling the dynamics of the phytomass of the
community of ground elder (Aegopodium podagraria L.), the dominant species of herbaceous cover in the elder
oak grove on dark gray forest soil. Using the ECOGRASS model, numerical experiments were carried out to study
the impact of the potential global climate change and the consumption of phytomass by animals on the productivity
of this community. Th reshold values of infl uence factors have been determined, upon reaching which the normal
functioning of the community is disrupted.