| Titre : |
Plant Eco-Morphological Traits as Adaptations to Environmental Conditions : Some Comparisons Between Different Biomes Across the World |
| Type de document : |
Extrait d'ouvrage |
| Auteurs : |
Javier Loidi (1953-) |
| Année de publication : |
2018 |
| Importance : |
p. 59-71 |
| Langues : |
Français (fre) |
| Résumé : |
Vegetation has been studied by means of eco-morphological trait syndromes of dominant plants (physiognomy) since the beginning of vegetation science. Different approaches have tried to match eco-morphological traits with environmental conditions in the basic belief that physiognomically similar vegetation types occur in different geographical areas where similar environmental conditions occur, in a physiognomic convergence phenomenon. This has been considered a fundamental phenomenon in plant geography and a validation for this approach. Comparison of physiognomic types from the Southern Hemisphere vegetation with those from the Northern Hemisphere reveals that this statement is of limited value. Winter deciduousness is a common feature in woody vegetation in the temperate biomes of the Northern Hemisphere, but it is rare in the Southern Hemisphere. Sclerophylly is a unifying trait in all Australian vegetation regardless of the different climatic areas in which they live. This can be related to the common origin of its flora. Traits may have developed as an adaptation to environmental conditions but show no particular adaptive advantages under current conditions, giving rise to the phenomenon of exaptation. The fact that ecological and phenotypical similarity of related taxa is greater than one would expect on a random basis, can be explained by phylogenetic niche conservatism and phylogenetic signal. A part of the observed traits are inherited from ancestors and not all of them conserve an adaptive functionality nowadays, in spite of having had it when they differentiated a long time ago. Phylogeny matters, also for eco-morphological trait syndromes. |
| Identifiant : |
DOI : 10.1007/978-3-319-68738-4_3  |
| Permalink : |
https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=85856 |
Loidi, Javier (1953-)
2018
Plant Eco-Morphological Traits as Adaptations to Environmental Conditions : Some Comparisons Between Different Biomes Across the World.
In: Geographical Changes in Vegetation and Plant Functional Types. Springer, [S.l.]: 59-71.
|
Plant Eco-Morphological Traits as Adaptations to Environmental Conditions : Some Comparisons Between Different Biomes Across the World (2018)