Forest ecosystems are an important component of the global carbon cycle. Carbon density (CD; mass per unit area) elevational changes in vegetation, litter, and soil forest ecosystems, poorly understood. We investigated CD variations arbor, shrubs, herbs, soils a Juniperus przewalskii Kom. (Przewalski’s juniper) at 2900–3900 m above sea level (a.s.l.) Qinghai Province, China. The average vegetat...