Leaf and Community Photosynthetic Carbon Assimilation of Alpine Plants Under in-situ Warming

The Tibetan Plateau is highly sensitive to elevated temperatures and has experienced significant climate warming in the last decades. While known greatly impact alpine ecosystems, gas exchange responses at leaf community levels meadow ecosystems remain unclear. In this study, grass, Elymus nutans , forb, Potentilla anserina were grown open-top chambers (OTCs) for 3 consecutive years evaluate their response warming. Gas measurements used assess effects of in-situ on leaf- community-level photosynthetic carbon assimilation based physiological parameters. We introduced a means up-scaling from level six easily measurable parameters, including net rate, fresh mass per unit area, weight all plant leaves community, percentage healthy leaves, received effective light by coverage. productivity increased with warming, rate was significantly higher than level. Under temperature, E. decreased, while that P. increased. These results indicated may influence assimilation, which could alter composition future.