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Concept
Tropical vegetation
Résumé
Tropical vegetation is any vegetation in tropical latitudes. Plant life that occurs in climates that are warm year-round is in general more biologically diverse that in other latitudes. Some tropical areas may receive abundant rain the whole year round, but others have long dry seasons which last several months and may vary in length and intensity with geographic location. These seasonal droughts have great impact on the vegetation, such as in the Madagascar spiny forests. Rainforest vegetation is categorized by five layers. The top layer being the upper tree layer. Here you will find the largest and widest trees in all the forest. These trees tend to have very large canopy's so they can be fully exposed to sunlight. A layer below that is the middle tree layer. Here you will find more compact trees and vegetation. These trees tend to be more skinny as they are trying to gain any sunlight they can. The third layer is the lower tree area. These trees tend to be around five to ten meters high and tightly compacted. The trees found in the third layer are young trees trying to grow into the larger canopy trees. The fourth layer is the shrub layer beneath the tree canopy. This layer is mainly populated by sapling trees, shrubs, and seedlings. The fifth and final layer is the herb layer which is the forest floor. The forest floor is mainly bare except for various plants, mosses, and ferns. The forest floor is much more dense than above because of little sunlight and air movement.
Plant species native to the tropics found in tropical ecosystems are known as tropical plants. Some examples of tropical ecosystem are the Guinean Forests of West Africa, the Madagascar dry deciduous forests and the broadleaf forests of the Thai highlands and the El Yunque National Forest in the Puerto Rico.
Tropical ecology and Tropical climate
The term "tropical vegetation" is frequently used in the sense of lush and luxuriant, but not all the vegetation of the areas of the Earth in tropical climates can be defined as such.
Source officielle
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Proximité ontologique
Cours associés (1)
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Concepts associés (8)
Seasonal tropical forest
Seasonal tropical forest, also known as moist deciduous, semi-evergreen seasonal, tropical mixed or monsoon forest, typically contains a range of tree species: only some of which drop some or all of their leaves during the dry season. This tropical forest is classified under the Walter system as (i) tropical climate with high overall rainfall (typically in the 1000–2500 mm range; 39–98 inches) and (ii) having a very distinct wet season with (an often cooler “winter”) dry season.
Jungle
La jungle est un terme polysémique qui n'a pas de signification biogéographique précise. Ce terme est un emprunt du hindi via la langue anglaise. La jangal désigne alors une formation végétale sèche comptant une proportion irrégulière d'arbres présente principalement dans le Teraï. Le succès du livre de Rudyard Kipling, Le Livre de la jungle, a popularisé le terme qui désigne désormais, par extension optimale, selon Roger Brunet, la forêt dense à la végétation verte et luxuriante, telle que la forêt tropicale.
Forêt tropicale
thumb|Forêt tropicale primaire de Bébour (Île de La Réunion). La forêt tropicale est la forêt caractéristique des régions tropicales et équatoriales. Sous ce terme se cachent des réalités très différentes, des forêts tropophiles, composées d'arbres assez épars poussant sous un climat tropical de savane, à la forêt dite tropicale humide dans des zones à climat équatorial, en passant par les forêts de nuages relativement froides.