Seedling Recruitment and Age-Specific Survivorship and Reproduction in Populations of Avena sterilis L. SSP. Ludoviciana (Durieu) Nyman

Fernández‐Quintanilla, César; Navarrete, L.; Andújar, José Luis González; Fernandez, A.; Sanchez, M. J.

doi:10.2307/2403946

Cited by 51 publications

(21 citation statements)

References 7 publications

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“…To confirm that the models provide a reasonable description of what would happen in reality, it is necessary to validate them (Cousens et al 1987). In the long-term studies on A. sterilis in Central Spain, survival and fecundity values frequently deviated 40% from the long-term averages (Fernandez-Quintanilla et al 1986). 3a-c).…”

Section: Discussionmentioning

confidence: 97%

See 1 more Smart Citation

Modelling the Population Dynamics of Avena sterilis Under Dry-Land Cereal Cropping Systems

González‐Andújar¹,

Fernández‐Quintanilla²

1991

The Journal of Applied Ecology

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. SUMMARY(1) A mathematical model for simulating the population dynamics of Avena sterilis ssp. ludoviciana (Dur.) Nyman has been constructed using previously reported data. The model considers the age structure of the population of seedlings as well as the effects of density on plant survivorship and reproduction.(2) The model is used to describe the behaviour of the population in the absence of control practices and to predict the effects of various control strategies. In the absence of control, and under continuous winter cereal cropping, the population grows hyperbolically, reaching equilibrium at a density of 535 plants m-2. Annual application of herbicides with < 85% control results in moderate reductions in the equilibrium level. To obtain a negative growth of the population it is necessary to apply herbicides annually with a control level of >90%. Fallowing the land for 1 in every 2-3 years gave a practical method of containing the populations of A. sterilis. However, to eradicate this weed it was necessary to combine crop rotation with application of herbicides.(3) The effects of changing the values of the parameters on the output of the model were generally minor. The two processes most sensitive to parameter variation were dispersal and mortality of seeds after reproduction and the fecundity of the first cohort of plants. The contribution of late emerging plants to the overall dynamics of the population was rather small and could be disregarded.(4) The model was validated by comparing simulation results with those from longterm field studies. Model predictions closely matched experimental results from herbicide trials, but gave only a crude description of the population dynamics under various crop rotations.

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Section: Discussionmentioning

confidence: 97%

“…Based on the results of emergence studies done over a period of 3 years, two values have been chosen for e: 0 304 for period 1 and 0 1 18 for period 2 (Fernandez-Quintanilla et al 1986). The standard deviations used to estimate this parameter were 0-18 and 0 05 for periods 1 and 2, respectively.…”

Section: Seedling Emergencementioning

confidence: 99%

Modelling the Population Dynamics of Avena sterilis Under Dry-Land Cereal Cropping Systems

González‐Andújar¹,

Fernández‐Quintanilla²

1991

The Journal of Applied Ecology

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“…Various studies have demonstrated mortality selection favoring early germination (Benard & Toft 2007, Castro 2006, Donohue 2002, Jones et al 1997, Seiwa 1998, Shimono & Kudo 2003, Stanton 1985, intermediate germination time (Donohue et al 2005, Fernandez-Quintanilla et al 1986, and late germination (Purrington & Schmitt 1998, Weekley et al 2007. In at least one study, germination time had no effect on survival (Seiwa 2000).…”

Section: Figurementioning

confidence: 99%

“…Combined effects of fecundity and survival can create stabilizing selection, favoring an intermediate germination time (Donohue et al 2005, Fernandez-Quintanilla et al 1986. Surprisingly, stabilizing selection is not as frequently observed as one might predict.…”

Section: Figurementioning

confidence: 99%

Germination, Postgermination Adaptation, and Species Ecological Ranges

Donohue

Casas

Burghardt

et al. 2010

Annu. Rev. Ecol. Evol. Syst.

777

794

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Germination behavior is one of the earliest phenotypes expressed by plants. This fact has several consequences for the evolution of postgermination traits, ecological niches, and geographic ranges. By determining the conditions that plants experience after they germinate, germination influences phenotypic expression of postgermination traits, natural selection on them, and their genetic basis. The breadth of germination niches may influence the ecological breadth and geographic ranges of species. Because germination is expressed early, it is frequently subjected to natural selection before other traits are expressed. We review evidence for natural selection on and adaptation of germination and discuss how the breadth of the germination niche is associated with the ecological niche and range of plant species. We review evidence for the coevolution of germination and postgermination traits and compare germination to postgermination niches. Finally, we discuss how germination responses to altered environments can influence species distribution and the evolution of postgermination traits after environmental change.

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“…Therefore, the seasonal timing of germination or hatching can be under strong natural selection (Fernandez‐Quintanilla et al. ; Jones et al. ; Purrington and Schmitt ; Seiwa ; Visser and Holleman ; Donohue ; Shimono and Kudo ; Donohue et al.…”

Section: Introductionmentioning

confidence: 99%

Gene duplication and the environmental regulation of physiology and development

Gibbs

Donohue

2014

Ecology and Evolution

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When different life stages have different environmental tolerances, development needs to be regulated so that each life stage experiences environmental conditions that are suitable for it, if fitness is to be maintained. Restricting the timing of developmental transitions to occur under specific combinations of environmental conditions is therefore adaptively important. However, impeding development can itself incur demographic and fitness costs. How do organisms regulate development and physiological processes so that they occur under the broadest range of permissive conditions? Gene duplication offers one solution: Multiple genes contribute to the same downstream process, but do so under distinct combinations of environmental conditions. We present a simple model to examine how environmental sensitivities of genes and how gene duplication influence the distribution of environmental conditions under which an end process will proceed. The model shows that the duplication of genes that retain their downstream function but diverge in environmental sensitivities can allow an end process to proceed under more than one distinct combination of environmental conditions. The outcomes depend on how upstream genes regulate downstream components, which genes in the pathway have diversified in their sensitivities, and the structure of the pathway.

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Seedling Recruitment and Age-Specific Survivorship and Reproduction in Populations of Avena sterilis L. SSP. Ludoviciana (Durieu) Nyman

Cited by 51 publications

References 7 publications

Modelling the Population Dynamics of Avena sterilis Under Dry-Land Cereal Cropping Systems

Modelling the Population Dynamics of Avena sterilis Under Dry-Land Cereal Cropping Systems

Germination, Postgermination Adaptation, and Species Ecological Ranges

Gene duplication and the environmental regulation of physiology and development

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