Juan Facundo Rodríguez-CraveroMuseo Argentino de Ciencias Naturales "Bernardino Rivadavia" · Plantas Vasculares
Juan Facundo Rodríguez-Cravero
PhD
Currently working with genus Stevia for the southern part of South America.
Constantly learning about Eupatorieae
About
20
Publications
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Introduction
Publications
Publications (20)
Praxelis clematidea is a relatively unknown herb native to South America that has spread globally over the past four decades. In this study, we integrate ecological niche modelling (ENM) and niche shift analyses to understand its distribution, test niche conservatism hypotheses, and identify potential invasion sites under different climate change s...
Asteraceae is the world’s richest plant family and is found on all continents, in environments ranging from the coast to the highest mountains. The family shows all growth forms and, as in other angiosperm families, species richness is concentrated in tropical regions. South America has the highest diversity of Asteraceae in the world, yet taxonomi...
The South American central Andes have a great richness of Asteraceae, where the genus Stevia (Eupatorieae, Piqueriinae) is also especially diverse. The taxonomy of Stevia species in the southern part of the central Andes pose a challenge because of the unclear delimitation among the species and overlap of morphological characters. Two species compl...
Pteridium esculentum es un helecho ampliamente distribuido en regiones templadas y cálidas del hemisferio sur. Si bien ha sido reconocido como una maleza agresiva y su ciclo de crecimiento ha sido estudiado a nivel local en muchos países, las condiciones climáticas óptimas para su establecimiento son poco conocidas debido a la diversidad de hábitat...
En este trabajo de tesis se revisó la taxonomía del género Stevia para parte del Cono Sur de América del Sur, comprendiendo los países de Argentina, Chile y Uruguay. Se llevó a cabo un estudio morfológico de estructuras vegetativas y reproductivas en las especies analizadas de Stevia. Se exploró la variabilidad de los caracteres del género con anál...
Stevia diversipapposa was first described by Hieronymus in 1897, along with its forms breviaristata, exaristata and longiaristata. All these names are considered as later synonyms of S. vaga, a widespread shrub from northwestern and central Argentina, described by Grisebach in 1874. During our revision of the Argentinian species of Stevia, we found...
The Eupatorieae represent nearly 10% of the Asteraceae, including about 187 genera and 2500 species. With close to 116 genera, South America is one of the richest areas for Eupatorieae diversity. Understanding of the taxonomy of the tribe has been hindered by the morphological variation of its genera and by the partly incongruent circumscription of...
Stevia Cav. (Asteraceae, Eupatorieae) includes ca. 235 species distributed from United States of America to Chile and Argentina in South America. During the taxonomic revision of the Argentinian species several specimens belonging to Stevia mandonii Sch. Bip. were found in the province of Jujuy, where it had not been previously cited. In this frame...
La familia Asteraceae está constituida por aproximadamente 40 tribus que representan sus diversos linajes evolutivos. Entre ellas se destacan las tribus Cardueae y Eupatorieae por su alta riqueza (i.e. más de 2200 especies en cada una) y una amplia distribución geográfica mundial. Ambas tribus incluyen especies de importancia económica: cultivos al...
A revision and a morphological analysis of the Uruguayan species of Stevia (Compositae, Eupatorieae) were performed. Leaf, inflorescence, pubescence and pappus traits were identified as key to separate species. Stevia entreriensis, S. entreriensis var. minor, and Dissothrix hassleriana were considered synonymys of S. hirsuta, and S. opryodonta a sy...
Climatic change and modeling of species of Stevia (Asteraceae) in northwestern Argentina. The
high biodiversity and species richness, along with a great variety of ecosystems, turn northwestern Argentina
into an adequate area for study the possible effects of climate change on the distribution of organisms. Asteraceae is a well-represented family o...
The high biodiversity and species richness, along with a great variety of ecosystems, turn northwestern Argentina into an adequate area for study the possible effects of climate change on the distribution of organisms. Asteraceae is a well-represented family of flowering plants in this area; especially, the genus Stevia, with 25 species which inhab...
Cynara cardunculus (Asteraceae, Cardueae), “cardo de Castilla”, es una especie introducida en el sur de América del Sur, California, Australia y Nueva Zelanda. Registrada en América del Sur desde el siglo XXVIII es escaso el conocimiento sobre su rango de distribución. El objetivo del trabajo fue obtener su distribución actual y modelar la aptitud...
Acanthostyles buniifolius es un arbusto nativo distribuido en el sur de América del Sur, desde el nivel del mar alcanzando los 3000 m. Presenta un patrón distribucional ya reconocido para otros taxones que conecta las Sierras Pampeanas con las Sierras Subandinas, Tandilia-Ventania, Uruguay y el sur de Brasil. El objetivo del presente trabajo fue mo...
Eleven species of Stevia were reported from Uruguay: S. aristata, S. burkartii, S. cinerascens, S. congesta, S. entreriensis, S. gratioloides, S. multiaristata, S. ophryodonta, S. sabulonis, S. satureiifolia, and S. selloi. Seven are shared with Argentina, five with Brazil, four with Paraguay, and two are endemic to Uruguay. During the revision of...
A taxonomical study of the Chilean Stevia is herein presented since there is no agreement on current names and the number of species for Chile. A detailed morphological analysis of type and non-type specimens including new field observations was undertaken. In this work we recognized only one species of Stevia in Chile: S. philippiana. This species...
Tribu con unos 110 géneros y 830 especies de regiones templadas de toda América; sólo algunas especies de África, Eurasia, Hawai y Australia. En la Argentina habitan 14 géneros con 42 especies, distribuidas desde el norte hasta el extremo continental patagónico. En su mayoría son nativas, dos introducidas y una escapada de cultivo.
Questions
Question (1)
As the title says, I have performed multiple ILD tests on PAUP with different settings and all of them reflect congruence between chloroplastic genes and ITS sequences (P > 0.1). I was wondering what would the implications be for these sequences or the taxa involved? Does this mean that the rate of change in nuclear and plastidial sequences are comparable? What does the congruence tell me about the history of the genes?
I was not able to find many papers in plants where they have performed phylogenetic analyses with plastidial and nuclear sequences concatenated, so any suggestion would be highly appreciated. Thanks in advance for your response
