Tropical rainforests provide a dense covering of all windward slopes in southern Mexico and Central America. The forests consist of such tall, broad-leaved evergreen trees as mahogany, ironwood, and palm, which form a spreading canopy over a lower tier of tree ferns, grape… Origin Tropical rainforests represent the oldest major vegetation type still present on the terrestrial Earth. Like all vegetation, however, that of the rainforest continues to evolve and change, so modern tropical rainforests are not identical with rainforests of the geologic past. Tropical rainforests grow mainly in three regions:
Amazon River rain forest in Peru Tropical rainforests can be characterized in two words: Tropical rainforests exhibit high levels of biodiversity.
Tropical rainforests are among the most threatened ecosystems globally due to large-scale fragmentation as a result of human activity. Habitat fragmentation caused by geological processes such as volcanism and climate change occurred in the past, and Tropical rainforest been identified as important drivers of speciation.
Tropical rain forests have been subjected to heavy logging and agricultural clearance throughout the 20th century, and the area covered by rainforests around the world is rapidly shrinking.
Most tropical rainforests today are on fragments of the Mesozoic era supercontinent of Gondwana. Other types of tropical forest Several biomes may appear similar-to, or merge via ecotones with, tropical rainforest: Moist seasonal tropical forest Daintree "rainforest" in Queensland is actually a seasonal tropical forest.
Moist seasonal tropical forests receive high overall rainfall with a warm summer wet season and a cooler winter dry season. Some trees in these forests drop some or all of their leaves during the winter dry season, thus they are sometimes called "tropical mixed forest".
They are found in parts of South America, in Central America and around the Caribbeanin coastal West Africaparts of the Indian subcontinentand across much of Indochina. Montane rainforests These are found in cooler-climate mountainous areas, becoming known as cloud forests at higher elevations.
Forest structure Rainforests are divided into different strata, or layers, with vegetation organized into a vertical pattern from the top of the soil to the canopy. Only the emergent layer is unique to tropical rainforests, while the others are also found in temperate rainforests.
Only plants adapted to low light can grow in this region. Away from riverbanks, swamps and clearings, where dense undergrowth is found, the forest floor is relatively clear of vegetation because of the low sunlight penetration. This more open quality permits the easy movement of larger animals such as: The forest floor also contains decaying plant and animal matter, which disappears quickly, because the warm, humid conditions promote rapid decay.
Many forms of fungi growing here help decay the animal and plant waste. Understory layer Main article: Understory The understory layer lies between the canopy and the forest floor. The understory is home to a number of birds, small mammals, insects, reptiles, and predators. Examples include leopard Panthera parduspoison dart frogs Dendrobates sp.
As an adaptation to these low light levels, understory plants have often evolved much larger leaves. Many seedlings that will grow to the canopy level are in the understory.
Canopy ecology The canopy is the primary layer of the forest forming a roof over the two remaining layers. It contains the majority of the largest trees, typically 30—45 m in height.The Tropical Rain Forest.
If you want to see more high-quality pictures of organisms from the temperate rainforest and other biomes, click here! Introduction: The tropical rainforest is earth’s most complex biome in terms of both structure and species diversity.
It occurs under optimal growing conditions: abundant precipitation and year round warmth.
There is no annual rhythm to the forest; rather each species has evolved its own flowering. The Bambusa tulda can be found in the biome of the Southeast Asian rainforest. It often grows as an undergrowth scattered or in patches in the forest.
Below are 35 facts on Tropical Rainforests. Fact 1: Rainforests only cover around 2 percent the total surface area of the Earth, but really about 50 percent of the plants and animals on the earth live in the rainforest.
A tropical rainforest climate, also known as an equatorial climate, is a tropical climate usually (but not always) found along the alphabetnyc.coms with this climate typically feature tropical rainforests, and it is designated Af by the Köppen climate classification.A tropical rainforest climate is typically hot and wet.
Places with this climate typically lie within 10º of the equator. Layers of the Rainforest. There are four very distinct layers of trees in a tropical rain forest.
These layers have been identified as the emergent, upper canopy, understory, and forest floor.. Emergent trees are spaced wide apart, and are to feet tall with .