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Beatriz Rumeu - One of the best experts on this subject based on the ideXlab platform.
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newly discovered seed dispersal system of juniperus Cedrus questions the pristine nature of the high elevation scrub of el teide tenerife canary islands
Arctic Antarctic and Alpine Research, 2014Co-Authors: Manuel Nogales, Beatriz Rumeu, Lea De Nascimento, Jose Maria FernandezpalaciosAbstract:As a working hypothesis, we examined evidence for the former presence of a climacic woodland of Juniperus Cedrus above the pine forest in the high elevation area of Tenerife (Canary Islands), which would indicate that the current dominant vegetation (endemic Spartocytisus supranubius scrub) may not be pristine. The main causes of the great regression of this woodland were caused by human activities (timber harvesting, herbivory by goats, and fires). The main support for this hypothesis is the survival of a presumably relict seed dispersal system of the endangered endemic J. Cedrus, which relies mainly on the wintering thrush Turdus torquatus. The fact that genetic factors are directly involved in the control of bird migration routes strongly supports the idea that this interaction could be remnant of an older system, probably more widespread in the past. To test this hypothesis, we propose that a paleoecological approach could reconstruct the vegetation dynamics in the Teide National Park (Tenerife) and the past presence of this seed disperser migratory thrush. The analysis of plant microfossils in sediments (e.g., pollen, spores, phytoliths, coprolites, and charcoal) would allow us to evaluate whether the current vegetation is the same as that which naturally existed in the past, and assess the impact of the anthropogenic and natural factors to which it has been subjected during history. The results of these analyses will be useful for future management policies and practices aimed at restoring the pristine landscape and biotic interactions of the Teide National Park. To our knowledge, the case presented in this contribution, based on the high dependence of the seed dispersal of an endemic tree (J. Cedrus) on a migratory bird, is the only reported in the context of oceanic islands.
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phylogeography and genetic structure of the threatened canarian juniperus Cedrus cupressaceae
Botanical Journal of the Linnean Society, 2014Co-Authors: Beatriz Rumeu, Manuel Nogales, Pablo Vargas, Ruth Jaenmolina, Juli CaujapecastellsAbstract:We used plastid sequences (trnL, trnL-trnF, petN-psbM and trnT-trnL) to infer the phylogenetic relationships and inter-island connections of the Canarian Juniperus Cedrus, and AFLP fingerprints to assess its genetic diversity patterns. Maximum Likelihood, Maximum Parsimony and Bayesian methods suggest independent colonization events for the three Macaronesian junipers and support the monophyly of J. Cedrus. Plastid sequences reveal a low genetic diversity (three haplotypes) and do not provide sufficient information to resolve its temporal and geographical origin. AFLPs indicate a greater isolation in J. Cedrus than in other Macaronesian trees with similar distributions and dispersal syndromes. Gran Canaria harbours the least genetically diverse population, which justifies immediate conservation actions. This island and Tenerife also show independent genetic structure, meaning that genetic exchange from other islands should be avoided in eventual reinforcements. Populations from La Palma and La Gomera show the highest genetic diversity levels and number of polymorphic AFLPs, probably because a lower incidence of felling has allowed a less dramatic influence of genetic bottlenecks. We suggest that management efforts should prioritize populations from these islands to preserve the evolutionary potential of the species, but we also stress the importance of knowledge of the evolutionary history, genetic structure and ecological interactions in conservation strategies. © 2014 The Linnean Society of London, Botanical Journal of the Linnean Society, 2014, 175, 376–394.
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development and characterization of 13 ssr markers for an endangered insular juniper juniperus Cedrus webb berth
Conservation Genetics Resources, 2013Co-Authors: Beatriz Rumeu, Manuel Nogales, Pedro A Sosa, M A GonzalezperezAbstract:We report the development of 13 microsatellite markers (SSR) for the Canarian endemic juniper, Juniperus Cedrus. Evaluated in a set of 28 individuals sampled on the island of Tenerife, all markers showed polymorphism and displayed 56 alleles. The number of alleles ranged from 2 to 8, with an average of 4.31 alleles per locus. This set of SSR markers will be very useful in further studies on the population genetics or phylogeography of this endangered species, leading to more appropriate and successful management.
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contrasting phenology and female cone characteristics of the two macaronesian island endemic cedars juniperus Cedrus and j brevifolia
European Journal of Forest Research, 2009Co-Authors: Beatriz Rumeu, Manuel Nogales, Rui B Elias, David P Padilla, Tiago Resendes, Airam Rodriguez, Francisco Valdes, Eduardo DiasAbstract:Phenology and female cone characteristics of the two endemic cedars (Juniperus Cedrus and J. brevifolia) from the Macaronesian islands were studied. Despite their closely taxonomic affinity and their evolution under insular conditions, different trends were recorded. Mature J. Cedrus female cones were present throughout the year, while those from J. brevifolia were only present in summer and autumn. J. Cedrus female cone size was significantly larger than that of J. brevifolia, a trend consistent with the presence of larger vertebrates (lizards and birds) in the Canary Islands. However, water content was four times higher in J. brevifolia female cones, which can be related with the higher rainfall existing in the Azores. J. Cedrus has two or three seeds per cone, whereas J. brevifolia frequently had three. Seeds from J. Cedrus were clearly larger and heavier, coinciding with the female cone size trend. However, tetrazolium tests revealed higher viability values in J. brevifolia. The relatively low percentage of filled seeds in J. Cedrus could be a consequence of the climatic stress and limits to pollination due to fragmented populations as described for other Juniperus species. In summary, our results reveal that some environmental factors such as the harsh conditions, high population fragmentation and the dependence on large dispersers have compromised the fitness of J. Cedrus in the Canary Islands.
Matthew E. Smith - One of the best experts on this subject based on the ideXlab platform.
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the Cedrus associated truffle trappeindia himalayensis is a morphologically unique and phylogenetically divergent species of rhizopogon
Mycologia, 2019Co-Authors: Alija Bajro Mujic, Joseph W. Spatafora, Michael A Castellano, Nan Zheng, Matthew E. SmithAbstract:: In the northwestern Himalayan mountains of India, the hypogeous sequestrate fungus Trappeindia himalayensis is harvested from forests dominated by the ectomycorrhizal tree Cedrus deodara (Himalayan cedar). This truffle has basidiospores that are ornamented with raised reticulation. The original description of Trappeindia himalayensis suggested that the gleba of this species is similar to young specimens of Scleroderma (Boletales), whereas its basidiospores are ornamented with raised reticulation, suggesting a morphological affinity to Leucogaster (Russulales) or Strobilomyces (Boletales). Given this systematic ambiguity, we have generated DNA sequence data from type material and other herbarium specimens and present the first molecular phylogenetic analysis of this unusual Cedrus-associated truffle. Despite the irregular ornamented basidiospore morphology, T. himalayensis is resolved within the genus Rhizopogon (Suillineae, Boletales) and represents a unique lineage that has not been previously detected. All known Rhizopogon species possess an ectomycorrhizal trophic mode, and because of its placement in this lineage, it is likely that Trappeindia himalayensis is an ectomycorrhizal partner of Cedrus deodara. This study highlights the importance of generating sequence data from herbarium specimens in order to identify fungal biodiversity and clarify the systematic relationships of poorly documented fungi.
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The Cedrus-associated truffle Trappeindia himalayensis is a morphologically unique and phylogenetically divergent species of Rhizopogon
Mycologia, 2019Co-Authors: Alija Bajro Mujic, Joseph W. Spatafora, Michael A Castellano, Nan Zheng, Matthew E. SmithAbstract:ABSTRACTIn the northwestern Himalayan mountains of India, the hypogeous sequestrate fungus Trappeindia himalayensis is harvested from forests dominated by the ectomycorrhizal tree Cedrus deodara (H...
Manuel Nogales - One of the best experts on this subject based on the ideXlab platform.
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newly discovered seed dispersal system of juniperus Cedrus questions the pristine nature of the high elevation scrub of el teide tenerife canary islands
Arctic Antarctic and Alpine Research, 2014Co-Authors: Manuel Nogales, Beatriz Rumeu, Lea De Nascimento, Jose Maria FernandezpalaciosAbstract:As a working hypothesis, we examined evidence for the former presence of a climacic woodland of Juniperus Cedrus above the pine forest in the high elevation area of Tenerife (Canary Islands), which would indicate that the current dominant vegetation (endemic Spartocytisus supranubius scrub) may not be pristine. The main causes of the great regression of this woodland were caused by human activities (timber harvesting, herbivory by goats, and fires). The main support for this hypothesis is the survival of a presumably relict seed dispersal system of the endangered endemic J. Cedrus, which relies mainly on the wintering thrush Turdus torquatus. The fact that genetic factors are directly involved in the control of bird migration routes strongly supports the idea that this interaction could be remnant of an older system, probably more widespread in the past. To test this hypothesis, we propose that a paleoecological approach could reconstruct the vegetation dynamics in the Teide National Park (Tenerife) and the past presence of this seed disperser migratory thrush. The analysis of plant microfossils in sediments (e.g., pollen, spores, phytoliths, coprolites, and charcoal) would allow us to evaluate whether the current vegetation is the same as that which naturally existed in the past, and assess the impact of the anthropogenic and natural factors to which it has been subjected during history. The results of these analyses will be useful for future management policies and practices aimed at restoring the pristine landscape and biotic interactions of the Teide National Park. To our knowledge, the case presented in this contribution, based on the high dependence of the seed dispersal of an endemic tree (J. Cedrus) on a migratory bird, is the only reported in the context of oceanic islands.
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phylogeography and genetic structure of the threatened canarian juniperus Cedrus cupressaceae
Botanical Journal of the Linnean Society, 2014Co-Authors: Beatriz Rumeu, Manuel Nogales, Pablo Vargas, Ruth Jaenmolina, Juli CaujapecastellsAbstract:We used plastid sequences (trnL, trnL-trnF, petN-psbM and trnT-trnL) to infer the phylogenetic relationships and inter-island connections of the Canarian Juniperus Cedrus, and AFLP fingerprints to assess its genetic diversity patterns. Maximum Likelihood, Maximum Parsimony and Bayesian methods suggest independent colonization events for the three Macaronesian junipers and support the monophyly of J. Cedrus. Plastid sequences reveal a low genetic diversity (three haplotypes) and do not provide sufficient information to resolve its temporal and geographical origin. AFLPs indicate a greater isolation in J. Cedrus than in other Macaronesian trees with similar distributions and dispersal syndromes. Gran Canaria harbours the least genetically diverse population, which justifies immediate conservation actions. This island and Tenerife also show independent genetic structure, meaning that genetic exchange from other islands should be avoided in eventual reinforcements. Populations from La Palma and La Gomera show the highest genetic diversity levels and number of polymorphic AFLPs, probably because a lower incidence of felling has allowed a less dramatic influence of genetic bottlenecks. We suggest that management efforts should prioritize populations from these islands to preserve the evolutionary potential of the species, but we also stress the importance of knowledge of the evolutionary history, genetic structure and ecological interactions in conservation strategies. © 2014 The Linnean Society of London, Botanical Journal of the Linnean Society, 2014, 175, 376–394.
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development and characterization of 13 ssr markers for an endangered insular juniper juniperus Cedrus webb berth
Conservation Genetics Resources, 2013Co-Authors: Beatriz Rumeu, Manuel Nogales, Pedro A Sosa, M A GonzalezperezAbstract:We report the development of 13 microsatellite markers (SSR) for the Canarian endemic juniper, Juniperus Cedrus. Evaluated in a set of 28 individuals sampled on the island of Tenerife, all markers showed polymorphism and displayed 56 alleles. The number of alleles ranged from 2 to 8, with an average of 4.31 alleles per locus. This set of SSR markers will be very useful in further studies on the population genetics or phylogeography of this endangered species, leading to more appropriate and successful management.
-
contrasting phenology and female cone characteristics of the two macaronesian island endemic cedars juniperus Cedrus and j brevifolia
European Journal of Forest Research, 2009Co-Authors: Beatriz Rumeu, Manuel Nogales, Rui B Elias, David P Padilla, Tiago Resendes, Airam Rodriguez, Francisco Valdes, Eduardo DiasAbstract:Phenology and female cone characteristics of the two endemic cedars (Juniperus Cedrus and J. brevifolia) from the Macaronesian islands were studied. Despite their closely taxonomic affinity and their evolution under insular conditions, different trends were recorded. Mature J. Cedrus female cones were present throughout the year, while those from J. brevifolia were only present in summer and autumn. J. Cedrus female cone size was significantly larger than that of J. brevifolia, a trend consistent with the presence of larger vertebrates (lizards and birds) in the Canary Islands. However, water content was four times higher in J. brevifolia female cones, which can be related with the higher rainfall existing in the Azores. J. Cedrus has two or three seeds per cone, whereas J. brevifolia frequently had three. Seeds from J. Cedrus were clearly larger and heavier, coinciding with the female cone size trend. However, tetrazolium tests revealed higher viability values in J. brevifolia. The relatively low percentage of filled seeds in J. Cedrus could be a consequence of the climatic stress and limits to pollination due to fragmented populations as described for other Juniperus species. In summary, our results reveal that some environmental factors such as the harsh conditions, high population fragmentation and the dependence on large dispersers have compromised the fitness of J. Cedrus in the Canary Islands.
Alija Bajro Mujic - One of the best experts on this subject based on the ideXlab platform.
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the Cedrus associated truffle trappeindia himalayensis is a morphologically unique and phylogenetically divergent species of rhizopogon
Mycologia, 2019Co-Authors: Alija Bajro Mujic, Joseph W. Spatafora, Michael A Castellano, Nan Zheng, Matthew E. SmithAbstract:: In the northwestern Himalayan mountains of India, the hypogeous sequestrate fungus Trappeindia himalayensis is harvested from forests dominated by the ectomycorrhizal tree Cedrus deodara (Himalayan cedar). This truffle has basidiospores that are ornamented with raised reticulation. The original description of Trappeindia himalayensis suggested that the gleba of this species is similar to young specimens of Scleroderma (Boletales), whereas its basidiospores are ornamented with raised reticulation, suggesting a morphological affinity to Leucogaster (Russulales) or Strobilomyces (Boletales). Given this systematic ambiguity, we have generated DNA sequence data from type material and other herbarium specimens and present the first molecular phylogenetic analysis of this unusual Cedrus-associated truffle. Despite the irregular ornamented basidiospore morphology, T. himalayensis is resolved within the genus Rhizopogon (Suillineae, Boletales) and represents a unique lineage that has not been previously detected. All known Rhizopogon species possess an ectomycorrhizal trophic mode, and because of its placement in this lineage, it is likely that Trappeindia himalayensis is an ectomycorrhizal partner of Cedrus deodara. This study highlights the importance of generating sequence data from herbarium specimens in order to identify fungal biodiversity and clarify the systematic relationships of poorly documented fungi.
-
The Cedrus-associated truffle Trappeindia himalayensis is a morphologically unique and phylogenetically divergent species of Rhizopogon
Mycologia, 2019Co-Authors: Alija Bajro Mujic, Joseph W. Spatafora, Michael A Castellano, Nan Zheng, Matthew E. SmithAbstract:ABSTRACTIn the northwestern Himalayan mountains of India, the hypogeous sequestrate fungus Trappeindia himalayensis is harvested from forests dominated by the ectomycorrhizal tree Cedrus deodara (H...
Juli Caujapecastells - One of the best experts on this subject based on the ideXlab platform.
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phylogeography and genetic structure of the threatened canarian juniperus Cedrus cupressaceae
Botanical Journal of the Linnean Society, 2014Co-Authors: Beatriz Rumeu, Manuel Nogales, Pablo Vargas, Ruth Jaenmolina, Juli CaujapecastellsAbstract:We used plastid sequences (trnL, trnL-trnF, petN-psbM and trnT-trnL) to infer the phylogenetic relationships and inter-island connections of the Canarian Juniperus Cedrus, and AFLP fingerprints to assess its genetic diversity patterns. Maximum Likelihood, Maximum Parsimony and Bayesian methods suggest independent colonization events for the three Macaronesian junipers and support the monophyly of J. Cedrus. Plastid sequences reveal a low genetic diversity (three haplotypes) and do not provide sufficient information to resolve its temporal and geographical origin. AFLPs indicate a greater isolation in J. Cedrus than in other Macaronesian trees with similar distributions and dispersal syndromes. Gran Canaria harbours the least genetically diverse population, which justifies immediate conservation actions. This island and Tenerife also show independent genetic structure, meaning that genetic exchange from other islands should be avoided in eventual reinforcements. Populations from La Palma and La Gomera show the highest genetic diversity levels and number of polymorphic AFLPs, probably because a lower incidence of felling has allowed a less dramatic influence of genetic bottlenecks. We suggest that management efforts should prioritize populations from these islands to preserve the evolutionary potential of the species, but we also stress the importance of knowledge of the evolutionary history, genetic structure and ecological interactions in conservation strategies. © 2014 The Linnean Society of London, Botanical Journal of the Linnean Society, 2014, 175, 376–394.