A5019485530- Botanical Research and Applications
- Botany, Ecology, and Taxonomy Studies
- Plant Diversity and Evolution
- Plant and animal studies
- Archaeology and Natural History
- Scarabaeidae Beetle Taxonomy and Biogeography
- Genetic diversity and population structure
- Plant and soil sciences
- Plant and Fungal Species Descriptions
- Animal Ecology and Behavior Studies
- Parasite Biology and Host Interactions
- Mycorrhizal Fungi and Plant Interactions
- Chemical synthesis and alkaloids
- Ecology and Vegetation Dynamics Studies
- Coastal wetland ecosystem dynamics
- Fern and Epiphyte Biology
- Parasitic Diseases Research and Treatment
- Primate Behavior and Ecology
Autonomous University of Queretaro
2010-2023
University of Reading
2007
Universidad Nacional Autónoma de México
1995-2001
Bayesian, maximum-likelihood, and maximum-parsimony phylogenies, constructed using nucleotide sequences from the plastid gene region trnK-matK, are employed to investigate relationships within Cactaceae. These phylogenies sample 666 plants representing 532 of 1438 species recognized in family. All four subfamilies, all nine tribes, 69% currently genera Cactaceae sampled. We found strong support for three although between subfamilies were not well defined. Major clades recovered largest...
The distributions of the majority endangered cacti in Chihuahuan Desert Region are concentrated southeastern and eastern segments area, where predominance narrow endemism is a remarkable phytogeographic phenomenon. We used three criteria—species richness, conservation value, complementarity—to evaluate 37 cactus‐rich area units Desert. evaluation these quantitative parameters together allowed us to determine that seven areas (Huizache, Tolimán, Ciudad Victoria, Metztitlán, Cuatro Ciénegas,...
: We mapped the geographical distributions of 93 endangered species cacti from Chihuahuan Desert Region. divided region into grids 30 minutes latitude by longitude and calculated frequencies for each grid. The with highest richness values are aggregated in areas moderate elevation, particularly towards southeastern to a lesser extent, eastern margins Region, northern San Luis Potosi southern portions Coahuila, Nuevo Leen, Tamaulipas. This vast area constitutes most important nucleus cactus...
Abstract DNA barcodes could be a useful tool for plant conservation. Of particular importance is the ability to identify unknown material, such as from customs seizures of illegally collected specimens. Mexican cacti are an example threatened group, under pressure because wild collection xeriscaping trade and private collectors. also provide taxonomically geographically coherent group with which test barcodes. Here, we sample matK barcode 528 species Cactaceae including approximately 75%...
Previous taxonomic schemes for the Cylindropuntieae were re-evaluated in light of a molecular phylogeny derived from Bayesian, maximum-likelihood and parsimony reconstructions with three plastid regions (atpB-rbcL, psbA-trnH trnK/matK data sets). The reconstruction revealed that Corynopuntia Grusonia as currently defined polyphyletic. Quiabentia, Micropuntia, Pereskiopsis Cylindropuntia only genera recovered monophyletic. s.s. (only including G. bradtiana) is nested polytomy rest species...
Molecular phylogenetic studies of the six currently accepted species in genus Echinocactus have partially clarified certain aspects its phylogeny. Most lack a complete sampling and are based only one source data. Phylogenetic uncertainties Echinocactus, such as recognition Homalocephala different from exclusion E.grusonii or affinities E.polycephalus, here resolved. relationships were reconstructed with maximum parsimony, likelihood Bayesian approach including 42 morphological characters,...
Se estudió la riqueza de especies plantas vasculares del municipio Guadalcázar en región Altiplano Potosino, un área clavada enla provincia fisiográfica conocida como Meseta Central y donde una parte significativa su superficie ha sido decretada natural protegida. registraron 813 5 tipos vegetación: matorral submontano, xerófilo, bosque Quercus, Pinus pastizal, siendo el submontano que alberga mayor florística, predominantemente familia Asteraceae. Un análisis patrón distribución todas las...
Ariocarpus bravoanus is common in trade but critically endangered its natural habitat. With the ultimate aim of developing a certification scheme to aid conservation this species, we have isolated A. microsatellites from nonenriched library. Fifty-four sequences contained microsatellite array, which eight were polymorphic among 23 individuals, 20 one population and three plants trade.
Opuntia pachyrrhiza, a new species of Caetaeeae from the southeastern portion Chi¬ huahuan Desert, Mexico, is described, illustrated, and mapped.The easily distinguished oth¬ er Mexican by its relatively short stature, long, massive rhizome, large, usually poor¬ ly branched cladodes.It appears to be restricted summits La Trinidad El Azul mountain ranges, in northern San Luis Potosf, Mexico.Resumen.Se describe, ilustra y mapea una nueva especie de Cactaceae del sureste la region Desierto...
The discovery of a previously unknown isotype Opuntia vilis Rose, collected by FE Lloyd in 1907 the state Zacatecas, Mexico, is reported collection herbarium New York Botanical Garden (NY). This was probably donated to NY United States National Herbarium (US) judging an annotation label included on voucher. composed seven flower sections, one detached pistil, and black white close-up photograph plant habitat. existence this has been unnoticed literature, because voucher deposited general...
The names Opuntia bulbispina, O. clavata, emoryi and grahamii, originally proposed by George Engelmann between 1848 1856, are reviewed typified after new findings of previously unknown voucher specimens. Original materials collected some the collaborators employed during Mexican Boundary Survey were discovered in a loan from Torrey Herbarium at New York Botanical Garden (NY). Many include fragments stems fruits, others only sectioned flowers seeds. Particularly good descriptions species here...
Molecular characterisation of the three taxa currently circumscribed under Strombocactus (Cactaceae, Cactoideae) based on analysis plastid matK, psbA-trnH and atpB-rbcL datasets, provided unambiguous identification two endangered highly wanted cacti species: S. corregidorae disciformis (including subsp. esperanzae). The combined autapomorphies in each markers even single molecular datasets provide a positive clear-cut for taxa. Bayesian, maximum likelihood parsimony phylogenetic analyses...
Nomenclatural proliferation is defined and characterized as a phenomenon of explosive increase in the number names within taxon. The monophyletic genus Grusonia illustrates how instability generic concept for this group species has produced disproportionate names. This large due mainly to treatments presenting new combinations at level without any significant reduction through synonymy, shows uncoupling generation from publication species. Three historical nomenclatural phases are identified...
Abstract Grusonia is an opuntioid genus in the Cylindropuntieae, Cactaceae, endemic to North American deserts Mexico and United States. The monophyletic status of degrees endemicity its species make a suitable study group order test biogeographic hypotheses such as vicariant or dispersal events, barriers time‐calibrated phylogenies propose speciation events group. statistical dispersal‐vicariance analysis (S‐DIVA) dispersal‐local extinction‐cladogenesis (S‐DEC) analyses show general...
A new classification proposal for the genus Grusonia is discussed and described. Three sectional names are advanced following a recently published phylogenetic scheme derived from five-plastid time-calibrated phylogeny. Two subgenera, Corynopuntia Grusonia, four sections, Radicaulenta, Xylocaulis, Spinicarpa recognized, described, discussed.
Three main genetic diversity hotspots were identified in a survey of the variability populations candy barrel cactus Echinocactus platyacanthus, protected and highly sought-after cacti for ornamental, culinary livestock water source Chihuahuan Desert Region, Mexico. This study one southern, central, northern population Region as first priorities conservation based on analysis matrix 4 ISSRs 183 individuals from 10 localities along 900 × 300 air km polygon geographic distribution species. The...