Spatial genetic structure of Taxus baccata L. in the western Mediterranean Basin: Past and present limits to gene movement over a broad geographic scale

González‐Martínez, Santiago C.; Dubreuil, Marta; Riba, Miquel; Vendramin, G. G.; Sebastiani, Federico; Mayol, María

doi:10.1016/j.ympev.2010.03.001

Cited by 69 publications

(60 citation statements)

References 67 publications

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“…In the case of yew, the SGS has been studied only at an among-population scale (Hilfiker et al, 2004;Myking et al, 2009;González-Martínez et al, 2010). Therefore, although yew shows clear structuring at a regional scale, knowledge of within-population SGS has still been lacking.…”

Section: Discussionmentioning

confidence: 99%

“…They have shown a strong genetic structure at a metapopulation level (Hilfiker et al, 2004;Myking et al, 2009;Zarek, 2009;Dubreuil et al, 2010). Interestingly, whereas populations at the centre of the natural range show rather high genetic diversity (Lewandowski et al, 1995;Hertel and Kohlstock, 1996), recent analyses have shown that genetic diversity decreases in the more peripheral areas (Myking et al, 2009;González-Martínez et al, 2010). Using allozymes low genetic diversity was found in Taxus brevifolia (El-Kassaby and Yanchuk, 1994), Taxus canadensis (Senneville et al, 2001) and especially in the Asian species Taxus cuspidata (Chung et al, 1999;Lee et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Increased inbreeding and strong kinship structure in Taxus baccata estimated from both AFLP and SSR data

2011

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Habitat fragmentation can have severe genetic consequences for trees, such as increased inbreeding and decreased effective population size. In effect, local populations suffer from reduction of genetic variation, and thus loss of adaptive capacity, which consequently increases their risk of extinction. In Europe, Taxus baccata is among a number of tree species experiencing strong habitat fragmentation. However, there is little empirical data on the population genetic consequences of fragmentation for this species. This study aimed to characterize local genetic structure in two natural remnants of English yew in Poland based on both amplified fragment length polymorphism (AFLP) and microsatellite (SSR) markers. We introduced a Bayesian approach that estimates the average inbreeding coefficient using AFLP (dominant) markers. Results showed that, in spite of high dispersal potential (bird-mediated seed dispersal and wind-mediated pollen dispersal), English yew populations show strong kinship structure, with a spatial extent of 50-100 m, depending on the population. The estimated inbreeding levels ranged from 0.016 to 0.063, depending on the population and marker used. Several patterns were evident: (1) AFLP markers showed stronger kinship structure than SSRs; (2) AFLP markers provided higher inbreeding estimates than SSRs; and (3) kinship structure and inbreeding were more pronounced in denser populations regardless of the marker used. Our results suggest that, because both kinship structure and (bi-parental) inbreeding exist in populations of English yew, gene dispersal can be fairly limited in this species. Furthermore, at a local scale, gene dispersal intensity can be more limited in a dense population.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Increased inbreeding and strong kinship structure in Taxus baccata estimated from both AFLP and SSR data

2011

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“…A generalized spatially-restricted seed dispersal limits considerably the capacity of the species to cope with ecological disturbances such as fragmentation, habitat loss or human activities. On the long-term, ecological limitations -restricted dispersal and the concomitant recruitment bottleneck -translate to the genetic structure of the species, causing genetic erosion and elevated inbreeding (Hilfiker et al, 2004b(Hilfiker et al, , 2004aDubreuil et al, 2010;González-Martínez et al, 2010).…”

Section: Frugivore Assemblage and Contribution To Seed Dispersalmentioning

confidence: 99%

“…Over the past centuries, yew populations have been declining in number, size, and therefore in connectivity (Dovčiak, 2002;Linares, 2013), especially at the margins of its geographical range (Sanz, 2008;González-Martínez et al, 2010). In the Iberian Peninsula, T. baccata is widespread, but most populations are small and suffer from lack of regeneration due to constrained recruitment (Abel et al, 2007;Sanz et al, 2009;Linares, 2013).…”

Section: Introductionmentioning

confidence: 99%

Geographic consistency in the seed dispersal patterns of Taxus baccata L. in the Iberian Peninsula

Lavabre

García²

2015

For. syst.

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Aim of the study: Seed dispersal is a crucial process in tree population dynamics. In the case of yew, Taxus baccata L., seeds are dispersed by birds and mammals in a non-random, microhabitat-dependent way, a pattern constraining population renewal and expansion. While skewed dispersal has been frequently found, we lack knowledge on how consistent are spatial restrictions across time and yew’s geographical range. This sort of information is required for the development of trans-regional management tools for this species. Area of study: Three Taxus baccata stands across Spain, namely Cantabrian Range, Sierra de Gredos and Sierra de Cazorla.Material and methods: During two consecutive years, we have been studying the contribution of frugivorous animals to the seed dispersal patterns of Taxus baccata L., in three ecologically contrasted localities of the Iberian Peninsula. Main results: The spatial distribution of the seeds in the landscape was very heterogeneous, with the majority of the seeds consistently dispersed into forested microhabitats and almost none outside the forest. The main seed dispersers were always frugivorous birds, particularly thrushes (Turdus merula, T. viscivorus, T. philomelos and T. iliacus). Research highlights: The results highlighted the large-scale consistency of the seed dispersal system of Taxus baccata. We suggest that the generalized spatially-restricted dispersal contributes to the lack of regeneration and absence of population expansion of the species all over its range. As a trans-regional conservation strategy, we recommend measures aimed at maintaining as much as diverse assemblage of frugivores in order to provide complementary seed dispersal and therefore enhance population regeneration and expansion.Keywords: English Yew; frugivory; seed rain; microhabitats; Turdus spp.; carnivorous mammals; spatially-restricted dispersal.

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“…Moreover, T. wallichiana was also recognized globally as endangered A2acd in the IUCN Red List of Threatened Species (Thomas and Farjon, 2011). In all species of Taxus L., T. baccata, the only species present in Europe, was studied systematically in conservation biology, population ecology and phylogeography (Piovesan et al, 2009;Scarnati et al, 2009;Dubreuil et al, 2010;González-Martíneza et al, 2010;Chybicki et al, 2011). As for T. wallichiana var.…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and population structure of the endangered conifer Taxus wallichiana var. mairei (Taxaceae) revealed by Simple Sequence Repeat (SSR) markers

Zhang

2013

Biochemical Systematics and Ecology

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Spatial genetic structure of Taxus baccata L. in the western Mediterranean Basin: Past and present limits to gene movement over a broad geographic scale

Cited by 69 publications

References 67 publications

Increased inbreeding and strong kinship structure in Taxus baccata estimated from both AFLP and SSR data

Increased inbreeding and strong kinship structure in Taxus baccata estimated from both AFLP and SSR data

Geographic consistency in the seed dispersal patterns of Taxus baccata L. in the Iberian Peninsula

Genetic diversity and population structure of the endangered conifer Taxus wallichiana var. mairei (Taxaceae) revealed by Simple Sequence Repeat (SSR) markers

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