Correlated patterns of variation in phenology and seed production in populations of two annual grasses along an aridity gradient

Volis, Sergei

doi:10.1007/s10682-006-9108-x

Cited by 61 publications

(66 citation statements)

References 58 publications

(45 reference statements)

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“…Germination and emergence respond to precipitation levels close to or higher than 20 mm in a single rainfall or accumulated in two weeks . Rainfall levels in Chile of around 10 mm can be effective for naturalized plants with superficial roots; similar rainfall values were found by Volis (2007) to initiate germination found in Hordeum spontaneum Koch. and Avena sterilis L. in Israel.…”

Section: Introductionsupporting

confidence: 68%

Effect of Quantity and Distribution of Rainfalls on Hordeum murinum L. Growth and Development

Johnston

Olivares²,

Calderón³

2009

Chilean J. Agric. Res.

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The growth and development of Hordeum murinum L. seeds growing with extreme pluviometric regimes in cool greenhouse conditions were evaluated. Seven treatments according to quantity and distribution of real rainfalls of the semiarid zone of the Metropolitan Region, Chile were applied: rainy-late, normal-late, dry-early, rainy-normal, normal-early and dry-late, plus a reference without water stress, at 2/3 field capacity. The experimental design was randomized complete blocks with five replicate pots. Seeds produced in the last year were sown in pots with disinfected soil leaving the more uniform plants after emergence. Evaluations were made of phytomass production, spearing shoots of roots, the quantity of floral stems and seeds, their total weight and the proportion of seed annex structures, and the viability and germination capacity of seeds. The life cycle of dry years was shortest and with the least dry shoot matter production, the rainy-normal and normal-late years had similar dry root matter production, therefore the most important factor was rainfall distribution. All the reproductive growth values were lower than the reference. There was no seed production in both distributions of dry years and in the normal-early. There were only differences in late distributions, there were no differences among treatments in seed quality. Thus, H. murinum uses its resources principally for seed production and late distributions determined seed production.

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Section: Introductionsupporting

confidence: 68%

Effect of Quantity and Distribution of Rainfalls on Hordeum murinum L. Growth and Development

Johnston

Olivares²,

Calderón³

2009

Chilean J. Agric. Res.

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“…Increasing aridity leads to shortening of growing season, and populations from arid habitats were found to flower earlier than in more mesic sites in many annual and perennial species (Aronson et al, 1992;Bennington and McGraw, 1995;Del Pozo et al, 2002;Eckhart et al, 2004;Franke et al, 2006;Hall and Willis, 2006;Volis, 2007). Selection for advance of flowering was found in several studies with experimentally induced drought stress (Stanton et al, 2000;Volis et al, 2004;Franks et al, 2007) and in a reciprocal transplant experiment with one desert and one Mediterranean site (Volis et al, .…”

Section: Discussionmentioning

confidence: 99%

Introduction beyond a species range: a relationship between population origin, adaptive potential and plant performance

et al. 2014

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The adaptive potential of a population defines its importance for species survival in changing environmental conditions such as global climate change. Very few empirical studies have examined adaptive potential across species' ranges, namely, of edge vs core populations, and we are unaware of a study that has tested adaptive potential (namely, variation in adaptive traits) and measured performance of such populations in conditions not currently experienced by the species but expected in the future. Here we report the results of a Triticum dicoccoides population study that employed transplant experiments and analysis of quantitative trait variation. Two populations at the opposite edges of the species range (1) were locally adapted; (2) had lower adaptive potential (inferred from the extent of genetic quantitative trait variation) than the two core populations; and (3) were outperformed by the plants from the core population in the novel environment. The fact that plants from the species arid edge performed worse than plants from the more mesic core in extreme drought conditions beyond the present climatic envelope of the species implies that usage of peripheral populations for conservation purposes must be based on intensive sampling of among-population variation. Heredity (2014) 113, 268-276; doi:10.1038/hdy.2014; published online 2 April 2014 INTRODUCTION Plant performance and adaptive potential across species rangeThe 'abundant center' model (Sagarin and Gaines, 2002) predicts a decrease in population size toward the species distributional periphery that implies that evolutionarily stable limits of species geographic distributions are shaped by two genetic parameters, effective population size and the amount of gene flow, and that these two parameters are higher at the range center and lower at range margins. According to this concept, species do not expand beyond range edges and plants fail to adapt to local conditions there because of lower genetic diversity and higher genetic differentiation in geographically peripheral as compared with core populations and therefore limited availability of locally beneficial alleles in these populations (Mayr, 1963;Hoffmann and Blows, 1994; Hoffmann and Parsons, 1997;Lennon et al., 1997; Keitt, 2000, 2005;Blows and Hoffmann, 2005;Alleaume-Benharira et al., 2006).The 'abundant center' model also has implications for a question of how population position within a species range affects its evolutionary potential, namely, its ability to adapt to changing environmental conditions. If peripheral populations have lower genetic variation in potentially adaptive traits than populations at the species core because of strong genetic drift, as predicted by the 'abundant center' model, then their potential for evolutionary adaptation to future changes will be low. On the other hand, if peripheral populations maintain substantial genetic variation in traits conferring adaptation to the specific range conditions, then their evolutionary potential and hence conservation value will be hig...

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“…Finally, phenological traits also usually show a very high level of heritability and high level of genetic variability within and among populations in plants and insects (Etterson & Shaw 2001;Etterson 2004a,b;Franks et al 2007;Volis 2007;van Asch et al 2007). This shows that phenological traits have a strong potential to evolve rapidly pending strong enough selection gradients.…”

Section: Why Is Phenology An Adaptive Trait?mentioning

confidence: 99%

“…Plant species have adapted their phenology to their local environment using primarily temperature and photoperiod to detect such optimal conditions (Sarvas 1972(Sarvas , 1974Hänninen 1990Hänninen , 1991Hänninen et al 1993;Heide 1993a,b;Kramer 1994bKramer , 1995Badeck et al 2004). Studies that have aimed at demonstrating the link between phenology and reproductive success are not numerous and have all concerned flowering phenology (Chidumayo 2006;Gimenez-Benavides et al 2006;Volis 2007;Inouye 2008;Ehrlen & Mü nzbergova 2009). It is quite intuitive to imagine that flowering phenology will affect the reproductive success of a plant, particularly in temperate, alpine, boreal and Mediterranean regions.…”

Section: How Is Phenology Involved In Reproductive Success Survival mentioning

confidence: 99%

Why does phenology drive species distribution?

Chuine

2010

Phil. Trans. R. Soc. B

602

530

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Despite the numerous studies which have been conducted during the past decade on species ranges and their relationship to the environment, our understanding of how environmental conditions shape species distribution is still far from complete. Yet, some process-based species distribution models have been able to simulate plants and insects distribution at a global scale. These models strongly rely on the completion of the annual cycle of the species and therefore on their accomplished phenology. In particular, they have shown that the northern limit of species' ranges appears to be caused mainly by the inability to undergo full fruit maturation, while the southern limit appears to be caused by the inability to flower or unfold leaves owing to a lack of chilling temperatures that are necessary to break bud dormancy. I discuss here why phenology is a key adaptive trait in shaping species distribution using mostly examples from plant species, which have been the most documented. After discussing how phenology is involved in fitness and why it is an adaptive trait susceptible to evolve quickly in changing climate conditions, I describe how phenology is related to fitness in species distribution process-based models and discuss the fate of species under climate change scenarios using model projections and experimental or field studies from the literature.

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Correlated patterns of variation in phenology and seed production in populations of two annual grasses along an aridity gradient

Cited by 61 publications

References 58 publications

Effect of Quantity and Distribution of Rainfalls on Hordeum murinum L. Growth and Development

Effect of Quantity and Distribution of Rainfalls on Hordeum murinum L. Growth and Development

Introduction beyond a species range: a relationship between population origin, adaptive potential and plant performance

Why does phenology drive species distribution?

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