Application of cellular automata to modelling competitive growths of two underwater species Chara aspera and Potamogeton pectinatus in Lake Veluwe

Chen, Q.; Mynett, Arthur E.; Minns, A. W.

doi:10.1016/s0304-3800(01)00428-8

Cited by 45 publications

(19 citation statements)

References 21 publications

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“…But these models were mostly aggregated, which failed to reflect the spatial heterogeneity and local interactions (Hupp & Osterkamp 1996;Perry & Enright 2007). As an alternative, spatially explicit approaches such as cellular automata were explored (Chen et al 2002;Perry & Enright 2007;Chen & Ye 2008).…”

Section: Riparian Vegetation Modulementioning

confidence: 99%

Modelling the impacts of reservoir operations on the downstream riparian vegetation and fish habitats in the Lijiang River

Chen

2010

Journal of Hydroinformatics

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River flow regulations have great impact on the downstream aquatic ecosystem. It is important to investigate the response of target species to the changes in hydrological regimes so that we can explore possible remediation measures. Ecohydraulics models that integrate hydrodynamics processes and ecological processes have been shown to be efficient in achieving these objectives.This study developed an integrated model which combined a two-dimensional hydrodynamic module with a vegetation evolution module and a fish habitat module. Owing to the ability to represent spatial heterogeneity and local interactions, the vegetation module used an unstructured cellular automata (UCA) approach. To describe the ambiguous relations between the physical conditions and habitat suitability, a fuzzy inference method was applied to the fish habitat module. The developed model was applied to a compound channel of the Lijiang River in southwest China, which has been greatly affected by the flow regulations of the Qingshitan Reservoir for navigation purposes. Through scenario simulations, the effects of flow regulation on riparian vegetation and fish habitat were analyzed. According to the results, water releases in the dry season imposed negative effects on the downstream semi-aquatic plant Rumex maritimus (R. maritimus) and Polygonum hydropiper (P. hydropiper) and favored the upland species Leonurus heterophyllus (L. heterophyllus). Regarding to the effects on fish Spinibarbus hollandi (S. hollandi) the results showed that water releases increased the suitability of the spawning conditions, especially during wet and dry years, but had little impact on the overwintering conditions. Key words 9 9 9 9 cellular automata, fuzzy inference, habitat modelling, river ecosystem, river regulation ABBREVIATION AND NOTATION

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Section: Riparian Vegetation Modulementioning

confidence: 99%

Modelling the impacts of reservoir operations on the downstream riparian vegetation and fish habitats in the Lijiang River

Chen

2010

Journal of Hydroinformatics

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“…Cellular automata is a mathematical system in which the simple local components interact together to produce complicated global dynamics (Alonso and Sole, 2000;Chen et al, 2002;Chen, 2004).…”

Section: Riparian Vegetation Modulementioning

confidence: 99%

“…As an alternative, spatially-explicit approaches such as cellular automata were explored (Chen et al, 2002;Perry and Enright, 2007;Chen and Ye, 2008;Chen et al, 2009a). The conventional cellular automata models applied structured grids, either square (Chen et al, 2002), or triangular or hexagon (Trunfio, 2004;Birch et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Modelling the riparian vegetation evolution due to flow regulation of Lijiang River by unstructured cellular automata

Chen

2010

Ecological Informatics

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a b s t r a c t a r t i c l e i n f o Keywords: Flow regulation Riparian vegetation Unstructured cellular automataThe flow regulation of rivers, mainly for flood control in wet season and water supply in dry season, dramatically altered the hydrological regime in the downstream, thus imposed significant impacts on the aquatic ecosystem. The evolution of riparian vegetation is an important indicator to quantify these impacts. This research focuses on the understanding of the vegetation dynamics and succession of riparian zones due to flow regulations by reservoir operation. The study developed an integrated model which couples a twodimensional hydrodynamics module with a vegetation evolution module. Owing to the ability to well present spatial heterogeneity and local interactions, the vegetation module applied a cellular automata approach. To more precisely describe the complex morphology and topography, and to improve computation efficiency, an unstructured cellular automata (UCA) scheme which implemented a triangular mesh was used. The developed model was applied to a typical compound channel of the Lijiang River, which has been largely affected by the flow regulations of the Qingshitan reservoir for navigation purpose. The model was calibrated by the historical vegetation data, the field observations and the controlling experiment data. Through the scenarios simulation, the effects of flow regulation on riparian vegetation dynamics were analyzed. In addition, the potentials of UCA in riparian vegetation modelling were well explored.

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“…This classical framework offers a large-scale description of systems where population densities vary in a continuous space. However, reaction-diffusion PDE models neglect small-scale spa-25 tial correlations and, when differences among individuals are significant and local interactions matter, other frameworks are more appropriate (Cronhjort, 2000;Chen et al, 2002). Such are spatially explicit individual-based models, cellular automata, and moment-based models (Gratzer et al, 2004).…”

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confidence: 99%

A Pair-Approximation Model for Spatial Patterns in Tree Populations with Asymmetrical Resource Competition

Garcia-Domingo

Saldaña

2013

Mathematical Population Studies

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A pair-approximation model for the spatial dynamics of a height-structured tree population 10 is defined on a regular lattice where each site can be in one of three states: empty (gap site), occupied by an immature tree, and occupied by a mature tree. The nonlinearities are associated with resource competition effects of mature trees on immature ones (asymmetric competition) affecting the mortality of the latter but not their growth. The survival-extinction transition of the forest is expressed; the early dynamics of colonization are described in terms 15 of local densities. Predictions of the pair approximation model are compared with results from numerical simulations of cellular automata.

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Application of cellular automata to modelling competitive growths of two underwater species Chara aspera and Potamogeton pectinatus in Lake Veluwe

Cited by 45 publications

References 21 publications

Modelling the impacts of reservoir operations on the downstream riparian vegetation and fish habitats in the Lijiang River

Modelling the impacts of reservoir operations on the downstream riparian vegetation and fish habitats in the Lijiang River

Modelling the riparian vegetation evolution due to flow regulation of Lijiang River by unstructured cellular automata

A Pair-Approximation Model for Spatial Patterns in Tree Populations with Asymmetrical Resource Competition

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