Studies on the demography and life history ofTaraxacum serotinum (Waldst. etKit.)Poir

Molnár, Edit; Bokros, Szilárd

doi:10.1007/bf02812086

Cited by 2 publications

(4 citation statements)

References 29 publications

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“…Higher abundance variation for flowering than for vegetative plants has been reported in other iteroparous herbaceous perennial species as well (e.g. Molnár & Bokros ; Wells et al . ; Pfeifer et al .…”

Section: Discussionmentioning

confidence: 75%

“…). Large between‐year variance in population size was similarly attributed to prolonged dormancy for Taraxacum serotinum (Molnár & Bokros ) and for the rare polycarpic perennial Perideridia erythrorhyza (Apiaceae, Malaby ). Earlier we observed (Kalapos ) that after entering the reproductive stage, F. sadleriana individuals flower each year for several years.…”

Section: Discussionmentioning

confidence: 99%

“…Higher abundance variation for flowering than for vegetative plants has been reported in other iteroparous herbaceous perennial species as well (e.g. Molnár & Bokros 1996;Wells et al 1998;Pfeifer et al 2006b). Small populations of rare species are especially prone to large fluctuation in the number of reproductive individuals (e.g.…”

Section: Population Fluctuation Over Timementioning

confidence: 95%

“…Prolonged dormancy is known to occur in 14 vascular plant families (including Apiaceae, Rabotnov 1969), and is most frequent among species growing on calcareous soil in dry, unshaded habitats (Reintal et al 2010). Large between-year variance in population size was similarly attributed to prolonged dormancy for Taraxacum serotinum (Molnár & Bokros 1996) and for the rare polycarpic perennial Perideridia erythrorhyza (Apiaceae, Malaby 2005). Earlier we observed (Kalapos 1998) that after entering the reproductive stage, F. sadleriana individuals flower each year for several years.…”

Section: Population Fluctuation Over Timementioning

confidence: 99%

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Population dynamics of the climate‐sensitive endangered perennial Ferula sadleriana Ledeb. (Apiaceae)

Lendvay

Kalapos

2012

Plant Species Biology

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Ancient plant species surviving in isolated small populations are particularly vulnerable to extinction, therefore understanding their population dynamics is necessary for conservation. The iteroparous perennial relic endemic Ferula sadleriana Ledeb. (Apiaceae) is restricted to seven distant localities in the Carpathian Basin, where it inhabits rocky hills. We monitored the species' largest population on the Pilis Hill, Hungary, over 14-19 years (depending on trait) between 1979 and 2010, and relationships were sought between climatic properties and population attributes. The population of 4000 Ϯ 1509 emergent individuals underwent large interannual fluctuations, with the vegetative stage displaying sevenfold and the reproductive stage twenty-eight-fold differences. Spring and early summer precipitation had a marked influence on abundances and seed set. Alternating years of high and low counts of reproductive plants suggest costs of reproduction that most probably incur prolonged dormancy and retrogression to the vegetative stage. Seed set was positively influenced by number of reproductive plants over years and by plant size within a year. Ungulates nullify yearly reproductive output by grazing on reproductive individuals. This is particularly intense in dry summers, when reproductive output is already low. The strong precipitation response of abundance, absence of clonal propagation and soil seed bank, and geographical isolation of the populations place F. sadleriana at considerable risk under an increasingly variable and extreme climate. Management should seek to maintain the species' original habitat mosaic (potentially compensating for climate variation), minimize grazing damage and anthropogenic disturbance, and establish ex situ conservation programs to provide propagules for eventual reintroduction.

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Section: Discussionmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 99%