Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. vegetation models C4 photosynthesis Earth system models Lineage Functional Types Plant Functional Types Review ecosystem function ecosystem models evolution evolutionary relatedness functional diversity grass biogeography grassland land surface models life history lineage-based functional types photosynthetic pathway phylogenetic signal physiological traits plant functional types structural traits tallgrass prairie