rare tree species

Exemptions and plantings of secondary stock tree species typical of Jura and Mittelland sites but have become rare. The rare tree species contribute to the diversity and structure of the forest ecosystem.本数据集涉及汝拉（Jura）与米特兰（Mittelland）地区典型且现已日趋珍稀的次生储备树种的特许种植与豁免培育活动。这些珍稀树种有助于提升森林生态系统的物种多样性并优化其群落结构。