 The study examined the species composition and productivity of three types of pine forests in the transural region of Russia. The forests differed in their humidity levels, with some being more humid and others less so. Despite this variation, the productivity of the lower layers was relatively consistent across the three types of forests. This suggests that the ecosystem has greater resilience than individual plants and that the productivity of the lower layers is maintained despite variations in humidity. Additionally, the study found that the productivity of the lower layers increased as the soil became more humid, suggesting that the humidity plays a role in maintaining the productivity of these forests. This article was authored by N.S. Ivanova and E.S. Zolatova.