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- W2023567909 abstract "Populations of rare tree species such as the dioecious and anemophilous yew (Taxus baccata) are especially prone to extinction if they occupy marginal habitats. This is the case of yew populations growing in Mediterranean mountains under dry climate and a severe anthropogenic disturbance regime, which show insufficient regeneration. We examined two of the likely mechanisms driving this population decline. The study was conducted in a central Spanish yew population in 2005 and 2006. On one hand, we tested for the effect of the amount of pollen received by female flowers by means of a pollen addition experiment. On the other hand, we tested for the effect of initial fruit set on abortion and mature fruit production. Finally, we evaluated the effect of the spatial arrangement of male and female yew trees on realized fecundity. The success of fertilization and fruiting in the experimental population was pollen-limited. Female trees aborted ca. 70% of the fruit set in both years and treatments. Fruit set was significantly influenced by the females' neighbourhood, with fecundity decreasing exponentially with distance to the nearest male in both years. Overall, our results indicate that factors associated with ecological marginality have a strong influence on yew performance." @default.
- W2023567909 created "2016-06-24" @default.
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- W2023567909 date "2014-11-19" @default.
- W2023567909 modified "2023-10-17" @default.
- W2023567909 title "Pollen limitation and fruit abortion in a declining rare tree, the Eurasian yew (<i>Taxus baccata</i>L.): A reproductive cost of ecological marginality" @default.
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- W2023567909 doi "https://doi.org/10.1080/11263504.2014.976290" @default.
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