The hidden order of Turing patterns in arid and semi‐arid vegetation ecosystems

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(42)

Published: Oct. 10, 2023

Vegetation Turing patterns play a critical role in the ecological functioning of arid and semi-arid ecosystems. However, long-range spatial features these have been neglected compared to short-range like patch shape wavelength. Drawing inspiration from hyperuniform structures material science, we find that vegetation pattern exhibits dispersion similar hyperuniformity. As degree hyperuniformity increases, so does water-use efficiency vegetation. This finding supports previous studies suggest represent spatially optimized self-organization ecosystems for water acquisition. The Turing-type significant slowing down near tipping point, indicating non-negligible transient dynamical behavior. Reduced rainfall not only decreases resilience steady state ecosystem but also slows rate optimization long regimes. We propose indicates after strong, short-term disturbances. Spatially heterogeneous disturbances reduce lead longer recovery times than homogeneous maintain

Language: Английский

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Six decades of the FitzHugh–Nagumo model: A guide through its spatio-temporal dynamics and influence across disciplines

Physics Reports, Journal Year: 2024, Volume and Issue: 1096, P. 1 - 39

Published: Oct. 30, 2024

Language: Английский

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Conserving seagrass ecosystems to meet global biodiversity and climate goals

Published: Feb. 28, 2025

Language: Английский

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How spatiotemporal dynamics can enhance ecosystem resilience

Proceedings of the National Academy of Sciences, Journal Year: 2025, Volume and Issue: 122(11)

Published: March 13, 2025

We study how self-organization in systems showing complex spatiotemporal dynamics can increase ecosystem resilience. consider a general simple model that includes positive feedback as well negative mediated by an inhibitor. apply this to Posidonia oceanica meadows, where and feedbacks are documented, there is empirical evidence of the role sulfide accumulation, toxic for plant, driving dynamics. describe progressive transition from homogeneous meadows extinction through dynamical regimes allow avoid typical ecological tipping points vegetation covers. A predictable sequence distinct observed mortality continuously increased: turbulent regimes, formation spirals wave trains, isolated traveling pulses or expanding rings, latter being harbinger collapse, however far beyond point cover. The used paper general, results be applied other plant–soil spatially extended systems, regardless mechanisms behind feedbacks.

Language: Английский

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Phenotypic plasticity: A missing element in the theory of vegetation pattern formation

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(50)

Published: Dec. 7, 2023

Regular spatial patterns of vegetation are a common sight in drylands. Their formation is population-level response to water stress that increases availability for the few via partial plant mortality. At individual level, plants can also adapt by changing their phenotype. Phenotypic plasticity and patterning populations have extensively been studied independently, but likely interplay between two robust mechanisms has remained unexplored. In this paper, we incorporate phenotypic into multi-level theory pattern use fascinating ecological phenomenon, Namibian “fairy circles,” demonstrate need such theory. We show changes root structure plants, coupled with pattern-forming feedback within soil layers, resolve puzzles current fails explain: observations multi-scale absence theoretically predicted large-scale stripe spot along rainfall gradient. Importantly, find responses unveil wide variety more effective stress-relaxation pathways, compared single-level responses, implying previously underestimated resilience dryland ecosystems.

Language: Английский

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Decoding the interaction mediators from landscape-induced spatial patterns

Physical review. E, Journal Year: 2025, Volume and Issue: 111(1)

Published: Jan. 2, 2025

Interactions between organisms are mediated by an intricate network of physico-chemical substances and other organisms. Understanding the dynamics mediators how they shape population spatial distribution is key to predict ecological outcomes would be transformed changes in environmental constraints. However, due inherent complexity involved, this task often unfeasible, from empirical theoretical perspectives. In paper, we make progress addressing central issue, creating a bridge that provides two-way connection features ensemble underlying wrinkles density induced landscape defect (or perturbation). The constructed applying Feynman-Vernon decomposition, which disentangles influences among focal compact way. This achieved through interaction kernel, effectively incorporates mediators' degrees freedom, explaining emergence nonlocal influence individuals, ad hoc assumption modeling dynamics. Concrete examples worked out reveal behind possible top-down inference procedure. locked icon Physics Subject Headings (PhySH)Ecological pattern formationPattern formation

Language: Английский

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Carbon storage of seagrass ecosystems may experience tipping points in response to anthropogenic stress - a modeling perspective

Frontiers in Complex Systems, Journal Year: 2025, Volume and Issue: 3

Published: March 18, 2025

Coastal Blue Carbon ecosystems like seagrass meadows are foundation habitats with a capacity to sequester and store organic carbon in their sediments, protection restoration may thereby support climate change mitigation while also supporting biodiversity many other ecosystem functions. However, being lost due human activities, disease and, some regions, change, which trigger the release of stored into atmosphere. Yet, we do not fully understand how global change-induced loss influences sedimentary dynamics. What is even less clear whether result tipping points, i.e. , abrupt difficult-to-reverse shifts, flux dynamics turning from net sinks sources. Here, propose that conceptual mechanistic models coupled ecological biogeochemical can help study effects major stressors on associated fluxes. We then illustrate one case such model focuses anthropogenic induced mortality by physical stress as an example. Our perspective highlights modeling approach for understanding response fluxes be useful informing coastal management towards actions.

Language: Английский

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Excitable dynamics and coral reef formation: A simple model of macro-scale structure development

Physical Review Research, Journal Year: 2025, Volume and Issue: 7(2)

Published: May 28, 2025

In this work, we demonstrate that key aspects of the dynamical behavior coral reefs at macro scale, which evolve over time scales centuries, can be accurately described using a model integrates few fundamental ecological and physical mechanisms. The displays excitable behavior, generating various regimes, including traveling pulses waves, lead to formation spatial structures similar those observed in real reefs. Notably, occurs without relying on pattern mechanism, such as Turing scenario. We conduct thorough analysis model's bifurcations response two ecologically significant parameters, laying foundation for explain reef formation. Published by American Physical Society 2025

Language: Английский

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Transitions between dissipative localized structures in the simplified Gilad–Meron model for dryland plant ecology

Chaos An Interdisciplinary Journal of Nonlinear Science, Journal Year: 2023, Volume and Issue: 33(3)

Published: March 1, 2023

Spatially extended patterns and multistability of possible different states are common in many ecosystems, their combination has an important impact on dynamical behaviors. One potential involves tristability between a patterned state two uniform states. Using simplified version the Gilad-Meron model for dryland we study organization, bifurcation terms, localized structures arising tristable regimes. These generally related to concept wave front locking appear form spots gaps vegetation. We find that coexistence gaps, within configurations, yields appearance hybrid also emergence spatiotemporal consisting portion periodic pattern embedded Hopf-like oscillatory background subcritical Turing-Hopf regime.

Language: Английский

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Unravelling the universal spatial properties of coral reefs

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 15, 2024

Abstract Coral reefs are under rapid decline due to human pressures such as climate change. Achieving the Kunming-Montreal Global Biodiversity Framework goals, which include restoring 30% of degraded habitats like coral by 2030, requires a comprehensive understanding their extent and structure, has been hitherto lacking. We address this limitation based on unprecedented canonical inventory extracted from Allen Atlas shallow-water tropical reefs. identified total 1,579,772 individual globally, extending over 52,423 km 2 ocean area with mean median sizes 3.32 ha 0.3 ha, respectively. unravelled three universal laws that common all reef provinces: size-frequency distribution, inter-reef distance distribution area-perimeter relation, follow power an exponent 1.8, 2.33 1.26, demonstrate develop fractal patterns characterised perimeter dimension D P = 1.3 surface A 1.6. Our analysis shows display intricate fractal-like geometries exhibit macroecological patterns, largely independent geographical location. The universality observed suggests these features possibly stem highly conserved interactions biological, physical, chemical processes. Over geological scales, processes lead landscape among provinces, providing new information relevant growth modelling.

Language: Английский

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