Geometric Models For Calculating Cell Biovolume And Surface Area For Marine Phytoplankton And Its Relative Conversion Biomass

The cell biovolume and surface area of marine phytoplankton are important ecological parameters. Phytop I ankton biovolume can be measured or calculated through calculation of simi lar geometric models. A set of geometric models is suggested for calculating eel I biovolume and surface area for 284 phytoplankton genera in China Sea waters. Thirty-one geometric shapes have been assigned to estimate the biovolume and surface area of phytoplankton cells. Reductions of error and microscopic effort are also discussed. The models has been compi led into a Visual Basic for Application software-BiovolumeTool, which included 863 common microalgae genera. These will be a base for marine phytoplankton cell biovlume and surface area calculation.The applicat ion of these models and the software was discussed in the paper. The phytop I ankton cell biovolume conversion carbon concentration (PCBCC) in the Bohai Sea was calculated according to the BiovolumeTool, and its distribution was described. Caparison the PCBCC with synchronous cell abundance and chlorophyll a data shown the results that PCBCC is a reasonable phytoplankton biomass expresser, which can give the most detail information of biomass even at the species level. In the paper, the importance of a phytop I ankton species in the community was calculated according to its PCBCC, and also the improvement of Shannon-Wiener biodiversity index and Pielou evenness index was established by recalculating based on the PGBCC. The PCBCC was also involved in calculating of the ecological efficient parameters. Application of PCBCCin calculation of phytoplankton community growth in the Bohai Sea, microzooplankton herbivorous grazing in the Hongkong and East China Sea waters, phytoplankton community sedimental flux were discussed in the paper. In a word, the applications of PCBCC are extendable.