2:30 PM - 2:45 PM
[ACG43-03] Coupled model system of vegetation model SEIB-DGVM and ocean model ROMS for modeling mangrove vegetation dynamics
Keywords:mangrove, vegetation dynamics, numerical simulation
For reproducing such mangrove vegetation pattern, fine-scale mapping of soil salinity is one of very important components, because zonation pattern should be closely linked with soil salinity pattern. However, it is difficult to obtain the fine-scale mapping only by field observation. Therefore, firstly to obtain fine-scale soil salinity map in the Fukido mangrove area, 3D hydrodynamic model for Fukido mangrove area is developed based on the Regional Ocean Modeling System (ROMS; Shchepetkin and McWilliams 2005; Haidvogel et al. 2008).
Mangrove vegetation pattern is, of course, not only caused by soil salinity pattern but also by other factors such as light competition between the mangrove species. Spatially Explicit Individual Based Dynamic Global Vegetation Model (SEIB-DGVM; Sato et al. 2007) is a dynamic vegetation model and is incorporated plant light competition process. The SEIB-DGVM is powerful tool for computing dynamic plant vegetation, but it cannot be cared spatial heterogeneity inside the computational domain. Therefore the SEIB-DGVM was largely modified to be able to import spatially varied soil salinity calculated by ROMS. In addition, biological features of two mangrove species, i.e. salinity tolerance and shade tolerance, were incorporated in the SEIB-DGVM.
This coupled model system of SEIB-DGVM and ROMS was performed for reproducing vegetation pattern of two mangrove species, R. stylosa and B. gymnorhiza, in Fukido mangrove area. In the result of the simulation, although further improvement and validation are needed, trend of the vegetation patterns of two mangrove species was well reproduced.