Pattern dynamics of a vegetation-water model with saturated effect and diffusion feedback

Desertification represents one of the most pressing ecological challenges globally, where vegetation patterns serve as critical indicators of ecosystem resilience and early-warning signatures of ecological degradation. Soil water diffusive feedbacks and saturation water uptake by vegetation are impo...

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Bibliographic Details
Published in:Physica A Vol. 673; p. 130676
Main Authors: Bai, Huimin, Fan, Yu-Xuan, Li, Li
Format: Journal Article
Language:English
Published: Elsevier B.V 01.09.2025
Subjects:
Bifurcation phenomena
Multi-scale analysis
Saturation water absorption effect
Soil water diffusion feedback
Vegetation patterns
Soil water diffusion feedback
Multi-scale analysis
Bifurcation phenomena
Vegetation patterns
Saturation water absorption effect
ISSN:0378-4371
Online Access:Get full text
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Summary:Desertification represents one of the most pressing ecological challenges globally, where vegetation patterns serve as critical indicators of ecosystem resilience and early-warning signatures of ecological degradation. Soil water diffusive feedbacks and saturation water uptake by vegetation are important mechanisms for vegetation-water interactions in arid and semi-arid environments. In this paper, a Klausmeier-type vegetation-water model is investigated to study the mechanism of vegetation pattern formation by incorporating a saturated water absorption term and soil water diffusion feedback. We derive amplitude equations near the Turing bifurcation point, revealing selection criteria and stability conditions for vegetation patterns. Our findings reveal that the saturated water absorption effect induces pattern phase transitions, the feedback mechanism of soil water diffusion accelerates desertification, and precipitation gradients induce the emergence of a bistable coexistence phenomenon. These results provide theoretical insights into the dynamics of vegetation patterns and offer guidance for ecosystem management and desertification control.
ISSN:0378-4371
DOI:10.1016/j.physa.2025.130676