A5035099502- Plant Diversity and Evolution
- Plant and animal studies
- Plant and Fungal Species Descriptions
- Evolution and Paleontology Studies
- Genomics and Phylogenetic Studies
- Ecology and Vegetation Dynamics Studies
- Fern and Epiphyte Biology
- Botanical Research and Applications
- Plant Parasitism and Resistance
- Paleontology and Stratigraphy of Fossils
- Genetic diversity and population structure
- Protist diversity and phylogeny
- Microbial Community Ecology and Physiology
- Botany, Ecology, and Taxonomy Studies
- Species Distribution and Climate Change
- Chemical synthesis and alkaloids
- Plant Pathogens and Fungal Diseases
- Plant and soil sciences
- Plant Reproductive Biology
- Land Use and Ecosystem Services
- Advanced Algorithms and Applications
- Conservation, Biodiversity, and Resource Management
- Scarabaeidae Beetle Taxonomy and Biogeography
- Mycorrhizal Fungi and Plant Interactions
- Plant Ecology and Taxonomy Studies
Universidad Nacional Autónoma de México
2015-2024
Instituto de Ecología
2021
Duke University
2017
Iowa State University
2017
Yale University
2017
University of Connecticut
2017
University of California, Los Angeles
2017
National Museum of Natural History
2017
Smithsonian Institution
2017
University of Cincinnati
2017
The establishment of modern terrestrial life is indissociable from angiosperm evolution. While available molecular clock estimates age range the Paleozoic to Late Cretaceous, fossil record consistent with diversification in Early Cretaceous. time-frame evolution here estimated using a sample representing 87% families and sequences five plastid nuclear markers, implementing penalized likelihood Bayesian relaxed clocks. A literature-based review palaeontological yielded calibrations for 137...
Abstract The extraordinary contemporary species richness and ecological predominance of flowering plants (angiosperms) are even more remarkable when considering the relatively recent onset their evolutionary diversification. We examine diversification angiosperms observed differential distribution in angiosperm clades by estimating rate for as a whole large set clades. also identify with standing diversity that is either much higher or lower than expected, given estimated background rate....
The extraordinary diversity of angiosperms is the ultimate outcome interplay speciation and extinction, which determine net diversification different lineages. We document temporal trends angiosperm rates during their early history. Absolute were estimated for order-level clades using ages derived from relaxed molecular clock analyses that included or excluded a maximal constraint to age. Diversification as whole ranged 0.0781 0.0909 events per million years, with dates constrained analysis....
Land plants play an essential role in the evolution of terrestrial life. Their time origin and diversification is fundamental to understanding life on land. We investigated timing rate molecular land plants, evaluating effects different types data, including temporal information from fossils, using clock methods. •Ages absolute rates were estimated independently with two substitutionally data sets: a highly conserved 4-gene set matK, fast-evolving gene. The vascular plant backbone crown...
Abstract Recent advances in molecular phylogenetics and a series of important palaeobotanical discoveries have revolutionized our understanding angiosperm diversification. Yet, the origin early evolution their most characteristic feature, flower, remains poorly understood. In particular, structure ancestral flower all living angiosperms is still uncertain. Here we report model-based reconstructions for flowers at deepest nodes phylogeny angiosperms, using largest data set floral traits ever...
Interactions between fungi and plants, including parasitism, mutualism, saprotrophy, have been invoked as key to their respective macroevolutionary success. Here we evaluate the origins of plant-fungal symbioses saprotrophy using a time-calibrated phylogenetic framework that reveals linked drastic shifts in diversification rates each kingdom. Fungal colonization land was associated with at least two terrestrial green algae preceded embryophytes (as evidenced by losses fungal flagellum, ca....
Summary Succulent plants are widely distributed, reaching their highest diversity in arid and semi‐arid regions. Their origin diversification is thought to be associated with a global expansion of aridity. We test this hypothesis by investigating the tempo pattern Cactaceae diversification. Our results contribute understanding evolution New World Biomes. use most taxonomically complete dataset currently available for Cactaceae. estimate divergence times utilize Bayesian maximum likelihood...
• Premise of the study: Cactaceae is one most charismatic plant families because extreme succulence and outstanding diversity growth forms its members. Although cacti are conspicuous elements arid ecosystems in New World model systems for ecological anatomical studies, high morphological convergence scarcity phenotypic synapomorphies make evolutionary relationships trends among lineages difficult to understand. Methods: We performed phylogenetic analyses implementing parsimony ratchet...
The recent proliferation of methodological advances in molecular phylogenetic and paleobiological research has resulted powerful approaches to investigate the temporal framework lineages. This article is a review paleontological methods estimate ages clades. Inferring clades complicated by nature process substitution uncertainties record. Some greatest problems associated with include stochastic substitution, assumption rate constancy among lineages when such absent, inextricable link...
An understanding of the evolution modern terrestrial ecosystems requires an dynamics associated with angiosperm evolution, including timing their origin and diversification into extraordinary present-day diversity. Molecular estimates age have varied widely, many substantially predate Early Cretaceous fossil appearance group. In this study, effect different genes, codon positions, chronological constraints on node ages are examined divergence time across seed plants, a special focus...
See also the Commentary by Dick and Pennington
Long branches are potentially problematic in molecular dating because they can encompass a vast number of combinations substitution rate and time. A long branch is suspected to have biased clock estimates the age flowering plants (angiosperms) be much older than their earliest fossils. This study explores effect subtending angiosperms how different relaxed clocks react it. Fossil angiosperm relatives, identified through combined morphological phylogenetic analysis for living fossil seed...
Why are some traits and trait combinations exceptionally common across the tree of life, whereas others vanishingly rare? The distribution diversity a clade at any time depends on ancestral state clade, rate which new phenotypes evolve, differences in speciation extinction rates lineages, whether an equilibrium has been reached. Here we examine role transition rates, differential diversification (speciation minus extinction) non-equilibrium dynamics evolutionary history angiosperms, well...
The origin of flowering plants (angiosperms) was one the most transformative events in history our planet. Despite considerable interest from multiple research fields, numerous questions remain, including age group as a whole. Recent studies have reported perplexing range estimates for crown-group angiosperms, ~140 million years (Ma; Early Cretaceous) to 270 Ma (Permian). Both ends spectrum are now supported by both macroevolutionary analyses fossil record and fossil-calibrated molecular...
Apicomplexan parasites, including the human pathogens Toxoplasma and Plasmodium , contain a vestigial plastid, apicoplast. This chloroplast-derived organelle is remnant of secondary endosymbiosis between an ancestral apicomplexan photosynthetic organism whose origin moot ([1–4][
Uncertainties in the age and phylogenetic position of Pinaceae fossils present significant obstacles to our understanding timing diversification family. We demonstrate that simultaneous analyses chloroplast DNA (matK rbcL) nonmolecular characters include both extant genera a limited number fossil taxa provide useful hypotheses for calibrating molecular trees. Root placements varied Pinaceae, with Bayesian recovering mutually monophyletic subfamilies Pinoideae Abietoideae parsimony as...
As angiosperms became one of the megadiverse groups macroscopic eukaryotes, they forged modern ecosystems and promoted evolution extant terrestrial biota. Unequal distribution species among lineages suggests that diversification, process ultimately determines richness, acted differentially through angiosperm evolution.