Theoretical Study on Self-Organization of Vegetation Patterns Triggered by Water Resource in Deposited Sediment Layer
Theoretical Study on Self-Organization of Vegetation Patterns Triggered by Water Resource in Deposited Sediment Layer
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沉积物层水资源引发植被格局自组织的理论研究
DOI：
10.1155/2019/9516865
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发表时间：
2019-07
期刊：
影响因子：
2.3
通讯作者：
Gao Zichun
中科院分区：
文献类型：
--
作者：
Huang Tousheng;Zhang Huayong;Liu Zhao;Pan Ge;Zhang Xiumin;Gao Zichun
本研究主要探讨了严重退化侵蚀土地上植被格局的自组织机制，即在形成植被格局的沉积层中，由水资源引发的植被格局自组织。建立了一个考虑植被生物量与沉积层水资源相互作用的非线性时空模型。利用该模型，通过图灵不稳定性分析确定了生态系统格局形成的条件。数值模拟的研究表明，带状，迷宫，和缺口植被格局的形成，与参数值取自文献。分析了植被格局的特征。通过与文献中植被格局特征的比较，发现其格局形成具有很大的相似性。研究结果为严重退化侵蚀地植被自然恢复提供了理论认识。
This research focuses on the self-organization of vegetation patterns on severely degraded eroding lands, triggered by water resource in the deposited sediment layer on which the vegetation patterns are formed. A nonlinear spatiotemporal model is developed with the consideration of the interactions between vegetation biomass and water resource stored in the sediment layer. With employment of the model, the conditions for pattern formation of the considered ecological system are determined via Turing instability analysis. Numerical simulations of the research demonstrate the formation of banded, labyrinth, and gapped vegetation patterns, with the parameter values taken from the literature. The characteristics of the vegetation patterns are analyzed. Comparing the characteristics of the vegetation patterns of this research with that available in literature, great similarity of pattern formation is shown. The results obtained provide a theoretical comprehension on natural vegetation restoration of severely degraded eroding lands.
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