Disturbance by mowing affects clonal diversity: the genetic structure of Ranunculus ficaria (Ranunculuaceae) in meadows and forests

Reisch, Christoph; Scheitler, Sebastian

doi:10.1007/s11258-008-9458-2

Cited by 19 publications

(17 citation statements)

References 39 publications

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“…Significant differences be tween treatments (1-way ANOVA with Treatment as fixed factor) are shown (***p < 0.0001) every 7 yr) and low within-meadow recruitment (Migli accio et al 2005). However, the relationship between population-level flower production and meadow genetic structure is complex, and herbivory may actually facilitate an increase in external recruitment and genetic flow as has been observed in some terrestrial meadows (Reisch & Scheitler 2009). This requires herbivore-free refuges to serve as source areas within the metapopulation (Arnaud-Haond et al 2007, Rozenfeld et al 2008.…”

Section: Discussionmentioning

confidence: 99%

Fish herbivory leads to shifts in seagrass Posidonia oceanica investments in sexual reproduction

Planes¹,

Raventós²,

Ferrari³

et al. 2011

Mar. Ecol. Prog. Ser.

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Section: Discussionmentioning

confidence: 99%

Fish herbivory leads to shifts in seagrass Posidonia oceanica investments in sexual reproduction

Planes¹,

Raventós²,

Ferrari³

et al. 2011

Mar. Ecol. Prog. Ser.

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“…In contrast, F. verna subsp. verna (herefrom F. *verna) is tufted stand-forming plant with elongated stems and loose spreading habit, which reproduces mainly vegetatively by axillary bulbils and disintegration of root tubers and rarely by seed (Marsden-Jones 1935, Metcalfe 1939, Wcisło & Pogan 1981, Sell 1994, Reisch & Scheitler 2009. Ficaria *verna is widespread and common in a number of moist to wet habitats ranging from grasslands through roadsides, ditches to shaded habitats such as city parks, gardens, mesic and wet deciduous woodlands and scrubland (Taylor & Markham 1978, Křísa 1997, Kubát et al 2002, Kästner & Fischer 2006.…”

Section: Introductionmentioning

confidence: 99%

Natural hybridization between diploid Ficaria calthifolia and tetraploid Ficaria verna subsp. verna in central Europe

Popelka¹,

Trávníček²,

Šiková³

et al. 2019

Preslia

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The genus Ficaria is a taxonomically intricate group in which polyploidization and hybridization contribute to taxa diversification. In central Europe, populations of diploid F. calthifolia and tetraploid F. verna subsp. verna occasionally come into contact, which results in an interspecific triploid hybrid, as recently demonstrated using molecular markers, genome size estimation and experimental crossing. In this study, we aimed to estimate the frequency and distribution of the triploid hybrid in central Europe, to identify those phenotypic traits that can be used to discriminate between hybrid and parental taxa and compare the phenology, pollen viability, sexual and asexual reproduction and niche differentiation of the triploid hybrid and parental taxa. Flowcytometry analyses of 1171 individuals sampled from 67 localities revealed that triploid hybrids were regularly found at 89% of the sites sampled where there were sympatric populations of both parental taxa, with a mean percentage of 19.4% occurring at sites where there was a mixture of cytotypes. No pure hybrid population was found. The hybrids were intermediate between the parental taxa in most morphological characters and did not show any novel morphological characters. The characters that best differentiate the taxonomic groups were the production of axillary bulbils, aborted and well-developed achenes, leaf shape and plant habit. Almost all hybrids were sexually sterile: the pollen viability was considerably reduced (mean 8.4%) and on average 98% of the achenes were aborted. Local dispersal of the hybrids is possible through the production of bulbils in the leaf axils, although the number of bulbils per node and the mean weight of one bulbil were two and three times lower in the hybrid than in F. verna subsp. verna. The hybrid niche was intermediate between those of the parental taxa but shifted slightly towards that of F. verna subsp. verna. In addition, the taxonomic and nomenclatural treatment of the hybrid, which is described as Ficaria ×sellii Duchoslav, Popelka et Trávn., as well as a key for identifying the central European taxa of Ficaria, are presented.

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“…Many studies have documented clear differences in genetic diversity and differentiation between management regimes (Kleijn & Steinger 2002, Reisch & Scheitler 2009, Reisch & Poschlod 2009 and disturbance levels (DiBattista 2008), and for the flooding influence in the riparian zone of the Meuse River valley even at short time scales (Honnay et al 2009) and over short distances (Jacquemyn et al 2006(Jacquemyn et al , 2009. For the O. vulgare populations no effects of disturbance or fragmentation on genetic diversity were present ), as we detected no difference in genetic diversity between small or large, spreading or remnant, intensively or extensively managed populations.…”

Section: Genetics Population Dynamics and Reproductive Strategymentioning

confidence: 99%

Adaptive strategy of a spreading gynodioecious plant species (Origanum vulgare, Labiatae) in a riparian corridor

Looy¹,

Honnay²,

Breyne³

2011

Plecevo

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Backgrounds and aims-Origanum vulgare L. is a successfully recovering gynodioecious species in the ecological restoration project along the Common Meuse (Belgium). Strong contrasts exist between spreading-mostly newly established-populations on the one hand, and remnant, declining populations on the other hand. The flowering strategy of the species was assumed to be related to these differences in population status. Two alternative hypotheses for small, isolated populations were postulated: either they contain more sterile individuals due to their presence in marginal conditions, or they show more hermaphrodites for reproductive assurance. Additionally, we aimed at relating neutral genetic variation of the populations with their status and sex ratio. Methods-An analysis at two levels was performed to get a consistent image of the differences in flowering strategy among and within populations. For the population-level survey, 25 populations were sampled for flowering strategy and for genetic analysis. For the within-population analysis, the survey focused on the expanding populations. Five expanding populations on the riverbanks were fully surveyed for the sex ratio of all individuals. Statistical analysis focussed on relationships between the populations' sex ratios and population genetics, size and dynamics, and stand conditions related to management intensity and isolation. Key results-Both hypotheses were supported, but at a different level. At the population level, the smaller populations showed more sterility. But within the expanding populations, isolated parts showed less sterility. For the observed sexual expression at population level, no significant correlation was present between sexual expression and population dynamics, isolation or management intensity. For the withinpopulation differentiation, a relationship with reproductive assurance in expanding populations was shown. For the observed differentiation in sex expression, indications are present for the flower strategy being a developmental plasticity. Conclusion-For O. vulgare, the gynodioecy proves a successful plastic strategy for expanding and new establishing populations to cope with pollen limitation and inbreeding depression.

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Disturbance by mowing affects clonal diversity: the genetic structure of Ranunculus ficaria (Ranunculuaceae) in meadows and forests

Cited by 19 publications

References 39 publications

Fish herbivory leads to shifts in seagrass Posidonia oceanica investments in sexual reproduction

Fish herbivory leads to shifts in seagrass Posidonia oceanica investments in sexual reproduction

Natural hybridization between diploid Ficaria calthifolia and tetraploid Ficaria verna subsp. verna in central Europe

Adaptive strategy of a spreading gynodioecious plant species (Origanum vulgare, Labiatae) in a riparian corridor

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