Growth Rules in Clonal Plants and Environmental Predictability -- A Simulation Study

Oborny, Beáta

doi:10.2307/2261302

Cited by 102 publications

(79 citation statements)

References 18 publications

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“…Mathematical models showed fitness effects of sexual vs. vegetative recruitment, which depended on the scale of disturbances and on growth form, where phalanx species had an advantage at small disturbances and guerilla at large ones (Winkler and Schmid, 1995;. In further models, fitness effects were found for foraging (Sutherland and Stillman, 1988;Cain, 1994;Oborny, 1994;Cain et al, 1996), and for integration (Oborny et al, 2000), which also depended on the scale of spatial heterogeneity. Experiments showed fitness effects of growth form which depended on ramet density (Schmid and Harper, 1985;Humphrey and Pyke, 1998), and fitness benefits of foraging [347] in a spatially heterogeneous competitive environment (va n Kleunen a nd Fischer, 2001).…”

Section: Fitness Benefits Of Clonal Traits and Of Their Plasticitymentioning

confidence: 99%

On the evolution of clonal plant life histories

Fischer

Kleunen

2002

Ecology and Evolutionary Biology of Clonal Plants

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Abstract. Clonal plant life histories are special in at least four respects: (I) Clonal plants can also reproduce vegetatively, (2) vegetative reproduction can be realised with short or long spacers, (3) a nd it may allow to plastically place vegetative offspring in benign patches. (4) Moreover, ramets of clonal plants may remain physically and physiologically integrated. Because of the apparent utility of such traits and because ecological patterns of distribution of clonal and non clonal plants differ, adaptation is a tempting explanation of observed clonal life history variation. However, adaptivc evolution requires (I) heri table genetic variation and (2) a trait effect on fitness, a nd (3) it may be cons trained if other evolutionary forces are overriding selection or hy constraints, costs and trade offs. (I) The few studies undertaken so far reported broad sense heritability for clonal traits. Variation in selectively neutral genetic markers appears as pronounced in popu lations of clonal as non clonal plants. However, neutral markers may not reflect heritable variation of life history traits . Moreover, clonal plants may have been samp led at larger spatia l scales. Empirical information on the contribution of somatic mutations to heritable variation is lacking.(2) C lonal life hi sto ry traits were found to affect fitness. However, much of this evidence stems from artificial rather than natura l environments. (3) The relative importance of gene flow, inbreeding, and genetic drift, compared with selection, in the evo lution of clonal life histories is hardly explored. Benefits of clonal life history traits were frequently studied a nd found. How ever, there is a lso evidence for constraints, trade offs, and costs. In conclusion, though it is very likely, that clonal life history traits are adaptive, it is neither clear to which degree this is the case, nor which clonal life history traits constitute adaptat io ns to which environmenta l fac tors. Moreover, evo lutionary interactions among clonal life history traits and between clonal and non clonal ones, such as the mating sys tem, are not well explored. There remains much interesting work to be done in this field which will be particularly interesting if it is done in the field.

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Section: Fitness Benefits Of Clonal Traits and Of Their Plasticitymentioning

confidence: 99%

On the evolution of clonal plant life histories

Fischer

Kleunen

2002

Ecology and Evolutionary Biology of Clonal Plants

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“…Thus, further growth in the shaded area can be slowed down or even completely abandoned, and a new, lateral direction of growth can be tried. This behavior can be adaptively advantageous in a wide range of patchy habitat types [13].…”

Section: The Means Of Controlmentioning

confidence: 99%

“…In this case, state of the environment at the time of induction may considerably differ from the state of the environment at the time of selection. Thus, the mutual information between the inducing and selecting environment maybe too low for promoting the evolution of plasticity at all [13]. Jablonka et al [43] have shown in a Markovian model that the optimal degree of inducibility increases as the time lag decreases.…”

Section: Time Lagsmentioning

confidence: 99%

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External and internal control in plant development*

Oborny

2004

Complexity

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“…Palm tree root iso-densities between 0 and 60 cm along transects between a nutrient rich patch (two tree clumps and one mound) and an adult palm. See text for explanations about the interpolation method Proliferation of roots in nutrient patches has widely been recognized in laboratory studies (Campbell et al, 1991a(Campbell et al, , 1991bDrew, 1975;Gersani and Sachs, 1992;Gross et al, 1993), controled field experiments (Caldwell et al, 1991;Jackson et al, 1990;Pregitzer et al, 1993), or theoretical models (Berntson, 1994;Oborny, 1994;Sutherland and Stillman, 1988). These studies are based on artificially created heterogeneity and mainly deal with herbaceous plants, and are not relevant to draw conclusions at the ecosystem level.…”

Section: ~" / 'mentioning

confidence: 99%

Root foraging strategies and soil patchiness in a humid savanna

Mordelet

Abbadie

1996

Plant Soil

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In Lamto (C6te d'Ivoire), the savanna is a patchy environment as far as soil is concerned: tree clumps and termite mounds lead to higher nutrient contents than in the surrounding savanna. Mature Borassus aethiopum (Mart.) specimens are tall palm trees dominating the community, with aerial parts located out of these nutrient-rich patches.Palm root densities were compared under tree clumps and in the surrounding savanna, and were also sampled along transects between palm trees and nutrient-rich patches (two clumps and one mound). Palm root densities were far higher (up to 10 times) in the nitrogen-rich soil of both clumps and termite mounds than in the surrounding savanna. Evidence is given that palm trees are able to extend their root system as far as 20 m towards these nutrient-rich patches where they proliferate. These results point out a particular root foraging strategy, which is one of the first known for a woody perennial. They also provide new insights for understanding nitrogen cycling and savannas high rate of primary production.

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Growth Rules in Clonal Plants and Environmental Predictability -- A Simulation Study

Cited by 102 publications

References 18 publications

On the evolution of clonal plant life histories

On the evolution of clonal plant life histories

External and internal control in plant development*

Root foraging strategies and soil patchiness in a humid savanna

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