青藏公路沿线高寒草甸次生群落特征及生态修复

A Research on the Secondary Community Character and the Ecosystem Rehabilitation of the Alpine Meadows Along the Qinghai-Tibet Highway

研究西藏自治区那曲地区青藏公路两侧的次生恢复植物群落特征及高寒草甸的生态修复。结果表明:在沿线两侧形成的次生群落中没有特有的建群种,大多数是耐瘠薄的禾草和杂类草;在草甸次生恢复的过程中,丰富度指数、均匀度指数和多样性指数的变化趋势基本一致;在适宜的自然条件下,被破坏的高寒草甸具有一定的自我恢复能力;今后应遵循自然客观规律,对已破坏的草甸,尽量避免进一步的干扰,使其自然恢复。

A research was conducted to explore the character of the secondary plant community and the natural restoration of the alpine meadows along the Qinghai-Tibet Highway in Nakchu Prefecture of the Tibet Autonomous Region. Results show that there existed no peculiar constructive species in the secondary community, but only hardy grasses and forbs. During the process of the secondary rehabilitation of the meadows, no change occurred in the indices of the plant richness, evenness, and diversity. With proper natural conditions, the destroyed alpine meadows could rehabilitate by themselves. We should comply with the natural law, and interfere with the alpine meadows no further; thus, allowing them to complete self-rehabilitation.