A conceptual framework for the study of modular responses to local environmental heterogeneity within the plant crown and a review of related concepts

Kawamura, Kôji

doi:10.1007/s11284-009-0688-0

Cited by 46 publications

(35 citation statements)

References 113 publications

(129 reference statements)

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“…However, the development of branching patterns in extant woody plants is a complex physiological process that remains inadequately understood [12][13][14]. Previous studies show that living plants respond to local heterogeneity in both abiotic and biotic conditions by changing module-level morphology, growth, and reproductive patterns [15,16].…”

Section: Discussionmentioning

confidence: 99%

When horsetails became giants

2012

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Section: Discussionmentioning

confidence: 99%

When horsetails became giants

2012

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“…6) rather than modular units that are autonomous with respect to their responses to local conditions (Kawamura 2010). This could provide a more mechanistic understanding of how different strategies of crown development contribute to species coexistence in mixed stands.…”

Section: Implications For Predicting Stand Development In Mixed-specimentioning

confidence: 99%

Crown responses to neighbor density and species identity in a young mixed deciduous stand

Barbeito

Collet

Ningre

2014

Trees

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Key message Density was more important in shaping crown structure than neighbor species identity. Both species showed high crown plasticity at alternative levels, which may explain species coexistence in mixed broadleaved forests with functionally similar species. Abstract Understanding crown response to local competition is essential to predicting stand development in mixed stands. We analyzed data from an 8-year-old field experimental plantation mixing two species according to a crossed gradient of density and species proportion to quantify the effect of a broad range of local neighborhood conditions on the development of young trees at multiple crown levels. We used Fagus sylvatica and Acer pseudoplatanus, as two model deciduous species. They are considered functionally equivalent at the young stages, but with contrasting architectural patterns. For both species: (1) changes in density explained more of the variation on crown development than species proportion (2) much of the effect of competition was accounted for by variables at the stem level, while branch and leaf development within crowns were not directly altered by competition. Both species were able to modify their crowns at the stem level to compete with intra-and inter-specific neighbors: Acer and Fagus were taller with a highest proportion of Fagus as neighbors; Fagus displayed a lower crown base when the proportion of Fagus decreased, while Acer had a lower crown base when the proportion of Fagus around it increased. Both species showed common shapes in allometric relationships but contrasting responses at alternative crown levels. Acer exhibited broader intra-specific variation in its height-diameter relationship and in its crown length, while Fagus displayed higher individual variation of branch development and leaf area than Acer. This study demonstrates that differences in crown development strategy of each species in response to changes in local neighborhood conditions are an important factor in maintaining species coexistence in broadleaved forests and designing mixtures that persist over time.

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“…These assumptions exclude any preferential allocation, neither due to proximity [18] nor due to growth strategy [20]. No references were found about the biomass partitioning between primary and secondary growth at whole-tree scale.…”

Section: Lnggu I (9a)mentioning

confidence: 99%

“…All lateral axes borne by the same Gu remain equal during the simulation, despite biological knowledge about vigor gradients [26] or asymmetric allocation depending of axis local environment [20].…”

Section: B Limits Due To Draft Modelling Choicesmentioning

confidence: 99%

Simulation of morphogenetical gradients using a minimal functional-structural plant model (FSPM)

Taugourdeau

Barczi

Caraglio

2012

2012 IEEE 4th International Symposium on Plant Growth Modeling, Simulation, Visualization and Applications

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Abstract-Context: Architectural studies highlight recurrent morphogenetical gradients that are observed on some tree species. These morphogenetical gradients are linked to morphological trends among successive shoots throughout plant structure and ontogeny. This study aims at testing a potential origin of these gradients as the complex result of some core plant functions. It will be achieved through a minimalist mathematical modelling approach.Methods: DRAFt is a discrete modelling approach at yearly step that benefits from a system of few mechanistic equations which attempts to simultaneously describe tree development (primary and secondary growth and branching) and functioning (assimilation and carbon partitioning). This FSPM aims at deeply interlacing both tree development and functioning using a formulation that keeps accuracy with knowledge about trees. DRAFt was implemented in AmapStudio for 3D simulations and outputs extractions.Main results: DRAFt succeeds in providing realistic trends with respect to morphogenetical gradients (tree base effect and axes drift). Different tree forms were simulated driven by input parameter values variations, which emphasize an effective model sensitivity. DRAFt consists in a 6 parameters system of equations which is minimalist compared to other previous more complex mechanistic FSPM. Conclusion and perspectives:This results are consistent with the idea that some morphological gradients are an emergence of few basic tree functions. Based on this generalist and simple core, some other biological processes may be plugged (apex mortality, sexuality position) depending on the accuracy to the biological question that is assessed. The minimalist formulation provides a mathematical framework that facilitates both further mathematical and computational studies. Moreover it would be interesting to be able to fit DRAFt parameters with real measurements and to carry on a meticulous sensitivity analysis of DRAFt behaviour.

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A conceptual framework for the study of modular responses to local environmental heterogeneity within the plant crown and a review of related concepts

Cited by 46 publications

References 113 publications

When horsetails became giants

When horsetails became giants

Crown responses to neighbor density and species identity in a young mixed deciduous stand

Simulation of morphogenetical gradients using a minimal functional-structural plant model (FSPM)

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