To clarify the relation between the pollen percentage of Larix and its stand density, surface samples from tundra, forest tundra and taiga in the Far East Russia were analyzed.

• 为了搞清楚落叶松花粉百分比和实际森林密度的关系,我们系统地分析了从苔原、森林苔原以及泰加林的表土样品。