干旱区生态环境知识资源中心(Arid): Long-distance seed dispersal affects the resilience of banded vegetation patterns in semi-deserts

Arid

DOI	10.1016/j.jtbi.2018.10.002
	Long-distance seed dispersal affects the resilience of banded vegetation patterns in semi-deserts
	Bennett, Jamie J. R.1; Sherratt, Jonathan A.
通讯作者	Bennett, Jamie J. R.
来源期刊	JOURNAL OF THEORETICAL BIOLOGY
ISSN	0022-5193
EISSN	1095-8541
出版年	2019
卷号	481 页码:151-161
英文摘要	Landscape-scale vegetation stripes (tiger bush) observed on the gentle slopes of semi-arid regions are useful indicators of future ecosystem degradation and catastrophic shifts towards desert. Mathematical models like the Klausmeier model-a set of coupled partial differential equations describing vegetation and water densities in space and time-are central to understanding their formation and development. One assumption made for mathematical simplicity is the local dispersal of seeds via a diffusion term. In fact, a large amount of work focuses on fitting dispersal 'kernels', probability density functions for seed dispersal distance, to empirical data of different species and modes of dispersal. In this paper, we address this discrepancy by analysing an extended Klausmeier model that includes long-distance seed dispersal via a non-local convolution term in place of diffusion, and assessing its effect on the resilience of striped patterns. Many authors report a slow uphill migration of stripes; but others report no detectable migration speed. We show that long-distance seed dispersal permits the formation of patterns with a very slow (possibly undetectable) migration speed, and even stationary patterns which could explain the inconsistencies in the empirical data. In general, we show that the resilience of patterns to reduced rainfall may vary significantly depending on the rate of seed dispersal and the width of the dispersal kernel, and compare a selection of ecologically relevant kernels to examine the variation in pattern resilience. Crown Copyright (C) 2018 Published by Elsevier Ltd. All rights reserved.
英文关键词	Banded vegetation Non-local Seed dispersal Desertification Resilience Self-organisation Tiger bush Reaction-diffusion-advection Periodic travelling wave
类型	Article
语种	英语
国家	Scotland
收录类别	SCI-E
WOS记录号	WOS:000487768100017
WOS关键词	KLAUSMEIER MODEL ; WAVE-TRAINS ; DYNAMICS ; SOIL ; COLONIZATION ; ORGANIZATION ; CONTINUATION ; AFRICA
WOS类目	Biology ; Mathematical & Computational Biology
WOS研究方向	Life Sciences & Biomedicine - Other Topics ; Mathematical & Computational Biology
EI主题词	2019-11-21
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310959
作者单位	1.Heriot Watt Univ, Dept Math, Edinburgh EH14 4AS, Midlothian, Scotland; 2.Heriot Watt Univ, Maxwell Inst Math Sci, Edinburgh EH14 4AS, Midlothian, Scotland
推荐引用方式 GB/T 7714	Bennett, Jamie J. R.,Sherratt, Jonathan A.. Long-distance seed dispersal affects the resilience of banded vegetation patterns in semi-deserts[J],2019,481:151-161.
APA	Bennett, Jamie J. R.,&Sherratt, Jonathan A..(2019).Long-distance seed dispersal affects the resilience of banded vegetation patterns in semi-deserts.JOURNAL OF THEORETICAL BIOLOGY,481,151-161.
MLA	Bennett, Jamie J. R.,et al."Long-distance seed dispersal affects the resilience of banded vegetation patterns in semi-deserts".JOURNAL OF THEORETICAL BIOLOGY 481(2019):151-161.