Resilience of revegetated grassland for restoring severely degraded alpine meadows is driven by plant and soil quality along recovery time: A case study from the Three-river Headwater Area of Qinghai-Tibetan Plateau

摘要: Abstract Resilience is crucial to promote the ecosystem sustainability and maintain functions services. Clarifying variation regularity of resilience can provide a theory foundation for restoration management degraded ecosystems. Grassland cultivation has been largely used restore extensively distributed “Black Beach”, severely alpine meadow on Qinghai-Tibetan Plateau (QTP). However, few researchers have documented revegetated grasslands along succession gradients. In this study, we surveyed QTP at different times: 4-year, 6-year, 9-year, 12-year, 13-year, 14-year, 16-year, 18-year by using chronosequence approach identify from perspectives plant soil quality. We treated Beach” as baseline restoration, non-degraded healthy target restoration. MDS method appropriate indicators created an integrated assessment system that quantified plant, soil, plant-soil recovery years. The results showed non-linear were identified systems temporal peaked 12th year. was superior after 13 years revegetation. Asynchrony existed between 16th From system, time grassland should be least 16–18 reach relative stable state. Revegetated effective improve quality in QTP.