Vegetation-environment relationships based on a life-forms c1assification in a semiarid region of Tropical Mexico
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| Autores: | , , , , |
|---|---|
| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 1996 |
| Descripción: | Taking the view that morphological characteristics represent behavioral strategies of plants to cope with environmental pressures, we defined 18 life-forrns, using multivariate classification techniques in a tropical semiarid ecosystem in Central Mexico. A multiple discriminant analysis confirrned the existence of these groups. A nul! model of random rnembership of species to life-forrns was significantly different from our classification. Vegetation-envíronment relationships were exanúned wíth Detrended Canonical Correspondence Analysis (DCCA). Ordínation axes were ínterpreted mainly by altitude and soíl moisture. Response curves of life-forrns along these gradients were explored fitting generalized linear models (OLIM's). We believe that the life-forrns approach for the study of vegetation-envíronment relationships ís a valid alternative to the tradítional specíes approach usually used in phytosociological research because: í) lífe-forrns number was found to be an excellent specíes diversity predictor, ii) this approach enables considerable reduction in the bulk of data without losing ecological inforrnation, and iíi) life-forrns represent ecological strategies per se and, they constitute an index of the number of different ways the desert's resources are utilízed |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/21648 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/21648 |
| Palabra clave: | morphological attributes morphological strategies ordination multiple discriminant analysis response curves xerophyllous scrub desert plants |