Erosion dynamics and fragmentation threshold of alpine meadow in Qinghai-Tibetan Plateau: a simulation on cellular automata

摘要：

　　Understanding the process and mechanisms of alpine meadow degradation is crucial for restoration and management.However, little is known about the complex and controversial problem because it is difficult to identify causes of degradation and even quantify them.Here, we built a spatiotemporal dynamical model for alpine meadow under the conceptual framework of cellular automata.Our model captures the natural process of meadow erosion (degradation) occurring at interface between barren patches and undamaged meadow.This model clarified the role of barren patche and meadow connectivity in alpine meadow degradation, and revealed the ecological mechanism and process accounting for the spatial and time pattern of meadow degradation.Importantly, we found fragmentation threshold and percolation threshold of degraded meadow, which is independent of spatial scale.Thus, this study highlights the key stage of meadow restoration.

关键词： erosion interface connectivity threshold percolation threshold

作者: Huilong Lin Yue Liang Feng Zhang Weixin Song

作者单位: State Key Laboratory of Grassland Ago-Ecosystems, College of Pastoral Agriculture Science and Techno Center for Quantitative Biology, College of Science, Gansu Agricultural University, Lanzhou 730070, Center for Quantitative Biology, College of Science, Gansu Agricultural University, Lanzhou 730070,

会议类型: 国际会议

会议名称: The 5th China-Japan-Korea Grassland Conference(第五届中-日-韩国际草地会议)

会议地点: 长春

会议语种:英文

页码: 36-37

在线出版日期: 2014-08-20（万方平台首次上网日期，不代表论文的发表时间）