1. The physiololgical and genetic factors of the different pathways of carbon assimilation.2. The ecological sinificance in the different pathways-resource segregation. ( 1 ) The spatial segregation of the different pholosynthetic types.The spatial segregation in climatic region and geographical area. The spatial segregation in microhabitat.( 2 ) The temporal segregation of the different photosynthetic types. ( 3 ) The adaptation of the different photosynthetic types to environments and the overlap in resou...