干旱区生态环境知识资源中心(Arid): Transient properties of grazing ecosystem driven by Levy noise and Gaussian noise

Arid

DOI	10.1088/1402-4896/acf00c
	Transient properties of grazing ecosystem driven by Levy noise and Gaussian noise
	Mi, Lina; Guo, Yongfeng; Ding, Jiaxin
通讯作者	Guo, YF
来源期刊	PHYSICA SCRIPTA
ISSN	0031-8949
EISSN	1402-4896
出版年	2023
卷号	98 期号:9
英文摘要	This paper explores how Levy noise and Gaussian noise affect the ecological grazing system by using the fourth-order Runge-Kutta method to simulate dynamic system and the Janicki-Weron algorithm to produce Levy noise. Two deterministic quantities, the mean first passage time (MFPT) and the probability density function (PDF) of the first passage time (FPT), are utilized to explore the transient properties of grazing ecosystem. Our research results show that: (i) The transitions between two alternative stable states can be induced by the Gaussian noise intensity, Levy noise intensity, Levy stability index and Levy skewness parameter. (ii) A higher Levy noise intensity and a larger Levy stability index or Levy skewness parameter make the MFPT from desert state to sustainable vegetated state shorter; a higher Gaussian noise intensity makes it longer, which indicates that increased Levy noise intensity can mitigate ecosystem degradation; increased Gaussian noise intensity will lead to desertification of vegetation. (iii) For larger Levy noise intensity, the MFPT from sustainable vegetated state to desert state as a function of Gaussian noise intensity exhibits one maximum value when it transformation from the sustainable vegetated state to the desert state, the noise enhanced stability (NES) phenomena of grazing ecosystems are observed.
英文关键词	first passage time grazing ecosystem Levy noise noise enhanced stability
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001054371500001
WOS关键词	MEAN 1ST-PASSAGE TIME ; STOCHASTIC RESONANCE ; REGIME SHIFTS ; MULTIPLICATIVE NOISE ; STABILITY ; DYNAMICS ; SYSTEM ; TRANSITIONS ; ACTIVATION ; PATTERNS
WOS类目	Physics, Multidisciplinary
WOS研究方向	Physics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397999
推荐引用方式 GB/T 7714	Mi, Lina,Guo, Yongfeng,Ding, Jiaxin. Transient properties of grazing ecosystem driven by Levy noise and Gaussian noise[J],2023,98(9).
APA	Mi, Lina,Guo, Yongfeng,&Ding, Jiaxin.(2023).Transient properties of grazing ecosystem driven by Levy noise and Gaussian noise.PHYSICA SCRIPTA,98(9).
MLA	Mi, Lina,et al."Transient properties of grazing ecosystem driven by Levy noise and Gaussian noise".PHYSICA SCRIPTA 98.9(2023).