|
|
|
|
|
| Paniagua-Ibánez,Maribel; López-Caamal,Alfredo; Mussali-Galante,Patricia; Sánchez-Salinas,Enrique; Ortiz-Hernández,Ma. Laura; Ramírez-Rodríguez,Rolando; Tovar-Sánchez,Efraín. |
| BACKGROUND: Morphological variability can lead to serious taxonomic problems in species with wide distribution ranges. Although morphological variability is partly due to ontogenetic programming, abiotic variables can also exert a significant effect on micro- and macromorphological characters. in this paper, we studied the morphological variability (43 characters) of Cosmos bipinnatus associated to different vegetation types in central Mexico. We searched for significant correlations between the overall morphology of C. bipinnatus and abiotic variables such as altitude and soil parameters (pH, organic matter content, NH4,NO3,PO4, total N and total P content). We also analyzed the Simplified Relative Distance Plasticity index (RDPIs). RESULTS: Locality had... |
| Tipo: Journal article |
Palavras-chave: Macromorphology; Micromorphology; Phenotype; Phenotypic plasticity reproductive character; Vegetative character. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2015000100014 |
| |
|
|
| López-Caamal,Alfredo; Tovar-Sánchez,Efraín. |
| Natural hybridization is a frequent phenomenon among vascular plants. Hybridization is considered an important evolutionary force since it may lead to (1) an increase of the intraspecific genetic diversity of the participating populations, (2) the creation of new species, (3) species extinction through genetic assimilation, and (4) the generation of highly invasive genotypes. Because of the importance of plant hybridization in evolution, it is of great importance to accurately identify hybrid individuals. In this review, we give a general historical background of the study of plant hybridization. Also, we review some of the tools employed for hybrid recognition and their pattern of expression in hybrid individuals (morphological, chemical, chromosome... |
| Tipo: Journal article |
Palavras-chave: Chromosome number; DNA fingerprinting; Hybrid performance; Hybrid phenotype; Invasive species; Secondary metabolites. |
| Ano: 2014 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2014000100015 |
| |
|
|
| Valencia-Cuevas,Leticia; Tovar-Sánchez,Efraín. |
| Canopy of forest ecosystems has been recognized as a habitat that supports a wide variety of plants, vertebrates, invertebrates, and microbes. Within the invertebrate group, arthropods are characterized by their great abundance, diversity, and functional importance. Particularly in temperate forests, species of the genus Quercus (oaks) are one of the most important tree canopy groups, for its diversity and dominance. Different studies have shown that the oak canopy contains a high diversity of arthropods suggesting their importance as habitat for this group of organisms. In this review, we investigated the factors that determine the establishment, organization, and maintenance of arthropod communities in the oak canopy. In general, it was found that there... |
| Tipo: Journal article |
Palavras-chave: Quercus; Temperate forests; Species diversity; Conservation. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2015000100015 |
| |
|
|
| Tovar-Sánchez,Efraín; Martí-Flores,Erwin; Valencia-Cuevas,Leticia; Mussali-Galante,Patricia. |
| BACKGROUND: Quercus crassifolia is an oak species with characteristics of foundation species, which is a canopy dominant element of different forest types that supports a wide diversity of associated species. Therefore, it is an excellent system to address important ecological questions. We analyzed the effect of individual genetic relatedness of the host plant, forest type (Abies-Quercus, Quercus-Pinus, and Quercus forest), and season (dry vs. rainy) on the canopy arthropod community structure. Thirty oak canopies were fogged (five individuals/season/forest type). RESULTS: We identified 442 arthropod species belonging to 22 orders. The highest values of density, diversity, and richness were recorded during the rainy season for each forest type. Also, the... |
| Tipo: Journal article |
Palavras-chave: Quercus; Foundation species; Individual genetic diversity; Microsatellites; Forest type; Arthropods community. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2015000100007 |
| |
|
|
| Tovar-Sánchez,Efraín; Valencia-Cuevas,Leticia; Mussali-Galante,Patricia; Ramírez-Rodríguez,Rolando; Castillo-Mendoza,Elgar. |
| BACKGROUND: Recently it has been proposed that the genetic diversity of foundation species influences the structure and function of the community by creating locally stable conditions for other species and modulating ecosystem dynamics. Oak species are an ideal system to test this hypothesis because many of them have a wide geographical distribution, and they are dominant elements of the forest canopy. In this study we explored the response of canopy arthropod community structure (diversity and biomass) to the level of genetic diversity of Quercus crassipes and Q. rugosa, two important canopy species. Also, we examined the effect of oak species and locality on some community structure parameters (diversity, biomass, rare species, and richness of arthropod... |
| Tipo: Journal article |
Palavras-chave: Arthropods community; Canopy; Foundation species; Genetic diversity; Quercus. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2015000100012 |
| |
|
|
|
