InforLorV4, Main, Exploration, bibRecord, 003B73

Neutral modelling of agricultural landscapes by tessellation methods-Application for gene flow simulation

Identifieur interne : 003B73 ( Main/Exploration ); précédent : 003B72; suivant : 003B74

Neutral modelling of agricultural landscapes by tessellation methods-Application for gene flow simulation

Auteurs : F. Le Ber [France] ; C. Lavigne [France] ; K. Adamczyk [France] ; F. Angevin [France] ; N. Colbach [France] ; J.-F. Mari [France] ; H. Monod [France]

Source :

Ecological modelling [ 0304-3800 ] ; 2009.

RBID : Pascal:10-0068014

Descripteurs français

Pascal (Inist)
- Modélisation, Milieu rural, Modalité traitement, Flux génique, Diagramme, Modèle, Neutral model, Paysage rural.

English descriptors

KwdEn :
- Application method, Diagram, Gene flow, Modeling, Models, Rural environment, Rural landscape.
mix :
- agricultural landscapes, field pattern, gene flow, genexp-landsites, neutral landscape models, rectangular tessellation, spatial point process, voronoi diagrams.

Abstract

Neutral landscape models are not frequently used in the agronomical domain, whereas they would be very useful for studying given agro-ecological or physical processes. Contrary to ecological neutral landscape models, agricultural models have to represent and manage geometrical patches and thus should rely on tessellation methods. We present a three steps approach that aimed at simulating such landscapes. Firstly, we characterized the geometry of three real field patterns; secondly, we generated simulated field patterns with two tessellation methods attempting to control the value of some of the observed characteristics and, thirdly, we evaluated the simulated field patterns. For this evaluation, we considered that good simulated field patterns should capture characteristics of real landscapes that are important for the targeted agro-ecological process. Real landscapes and landscapes simulated using either a Voronoi or a rectangular tessellation were thus compared when used as input data within a gene flow model. The results showed that neither tessellation method captured field shapes correctly, thus leading to over or (small) under estimation of gene flow. The Voronoi tessellation, though, performed better than the rectangular tessellation. Possible research directions are proposed to improve the simulated patterns, including the use of post-processing, the control of cell orientation or the implementation of other tessellation techniques.

Url:

https://hal.archives-ouvertes.fr/hal-00409081

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="en">Neutral landscape models are not frequently used in the agronomical domain, whereas they would be very useful for studying given agro-ecological or physical processes. Contrary to ecological neutral landscape models, agricultural models have to represent and manage geometrical patches and thus should rely on tessellation methods. We present a three steps approach that aimed at simulating such landscapes. Firstly, we characterized the geometry of three real field patterns; secondly, we generated simulated field patterns with two tessellation methods attempting to control the value of some of the observed characteristics and, thirdly, we evaluated the simulated field patterns. For this evaluation, we considered that good simulated field patterns should capture characteristics of real landscapes that are important for the targeted agro-ecological process. Real landscapes and landscapes simulated using either a Voronoi or a rectangular tessellation were thus compared when used as input data within a gene flow model. The results showed that neither tessellation method captured field shapes correctly, thus leading to over or (small) under estimation of gene flow. The Voronoi tessellation, though, performed better than the rectangular tessellation. Possible research directions are proposed to improve the simulated patterns, including the use of post-processing, the control of cell orientation or the implementation of other tessellation techniques.</div>
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Neutral modelling of agricultural landscapes by tessellation methods-Application for gene flow simulation

Neutral modelling of agricultural landscapes by tessellation methods-Application for gene flow simulation

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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