Forest soil organic matter δ13C along a |altitudinal transect on northern slope of Changbai Mountains under effects of simulated warming. Influence of Simulated Warming to the Carbon, Nitrogen and Their Stability Isotope (δ13C,δ15N) Contents in Alpine Meadow Plant Leaves Physiological-biochemical Responses of Three Plant Species to Experimental Warming Using OTC in Alpine Meadow on Qinghai-Tibetan Plateau Effects of simulated warming on soil DOC and DON concentrations in the alpine forest of western Sichuan based on altitudinal gradient experiment.