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7 answers

Tropical rain forests do not allow the sunlight to penetrate to the ground. The plants shield the soil from increasing temperatures that would be caused by the soil absorption of sunlight.

The plants also remove the rain from thr soil and through transpiration, and release water into the atmosphere.

So the answer is it helps to control the temperature and humidity.

2006-09-25 05:52:51 · answer #1 · answered by Richard 7 · 71 0

i am not a very good geo student but this's what i know.
Countries in indonesia clear tropical forest for agriculture. We don't clear as much temperate coniferous or deciduous forest as those.
These trees also give out lots of carbon dioxide during the night.
Carbon dioxide is one of the greenhouse gases. Methane gas is also produced there. It's damp andmuddy, ideal for methaane- releasing gas to thrive.And lots of organisms dies there too. Tropiclaforest have a lot more organisms than other forest and so, more methane gas is produce. Now, green house gases causes green house efeect. Global warming occurs because the heat is trapped. It has been predicted that global warming would lead to an increase in the evaporation of water. A rise in the amount of water vopour in the atmosphere dould lead to fyrther glocal warming. With a greater amount of water vapour in the atmosphere, more rainfall would be expected. This rainfall is no evenly distributed. In dry regions, excessive evaporation would intensify the dry conditions and cause severe droughtsa and water shortage. Heatwaves, which are periods of abnormally hot weather, could become more frequent. In wetter regions,too much rainfall could cause floods.
I hope this helps=))
the reason i think , base on books and notes should be because of the gas produced( carbon dioxide and methane)

2006-09-26 07:02:09 · answer #2 · answered by Chan Meiyean 2 · 0 0

Do you mean as in "tropical rain forest"? For example, the Amazon rain forest functions as a the "lungs" of the planet. Without going into a ton of detail in this itty bitty space -- trees are very efficient at removing carbon dioxide and some impurities from the atmosphere; they release tons of oxygen into the air. They also modify the climate, by increasing the relative humidity in the area. This in turn, modifies the climate in the region, by lowering overall temperatures, and by also decreasing the temperature differences between night and day. This increases the amount of water vapor into the atmosphere, and that leads to more clouds, and more rain.
Trees / rain forests also increase the amount of biomass in the biosphere, which also provides more food for vegetarian animals, and in turn, more meat for carnivores. "Life is good..."

2006-09-25 12:52:37 · answer #3 · answered by Joya 5 · 1 0

The global climate varies with changes in the polar ice caps, in surface and subsurface temperatures of the oceans, by absorption, reflection and transmission of energy in the form of light and heat from the surface of the earth. Since nearly two thirds of the surface of the globe is covered by oceans and the polar ice caps, these, rather than forests and other land features, are the most significant physical features of the globe affecting climate.

2006-09-25 12:53:09 · answer #4 · answered by Al Bundy 4 · 0 1

The first Europeans to view humid tropical forests were stunned by the luxuriant growth, giant trees with huge buttresses, thick vines, plants growing on plants (epiphytes), etc. Such luxurious growth signals high productivity, and modern scientific measurements confirm this. If one measures the PS, or captures the litterfall of leaves, branches, fruit and other plant parts to the forest floor, one finds the production of tropical evergreen forests to be roughly double that of temperate forests.

It would be natural to infer that tropical soils are fertile, to support this high productivity. Generally speaking, such an assumption would be incorrect.

You already know that ecosystems are open with respect to nutrient cycling, meaning that inputs and outputs are significant. You also know from the Hubbard Brook example that nutrients are retained within forested ecosystems by recycling. What makes humid tropical forests so productive is the combination of high temperatures and rainfall year-round, coupled with especially efficient nutrient recycling.


What is the evidence for this claim?
First, analysis of soils of tropical regions shows them to be virtually devoid of soluble minerals. Rocks weather rapidly due to high temperatures and abundant moisture, and millennia of torrential rains have washed away nutrients from the soils.

Analysis of stream water draining tropical regions likewise reveals a scarcity of dissolved nutrients. Most tropical soils are clays with little soluble mineral content, and moderate to strong acidity which interferes with the ability of roots to take up nutrients. Only about 20% of the humid tropics has soils that can support agriculture, and most of this area is already in use.

A budget accounting shows that nutrients are found mainly in living plant biomass and the layer of decomposing litter. This suggests that plants are intercepting nutrients the moment they are released by decomposition.

There are many players in the decomposition process: termites, bacteria, fungi, various invertebrates. Of particular importance are microrhizal fungi which invade the roots of trees to obtain nourishment, but benefit the tree by providing a vastly expanded nutrient gathering network. In some circumstances tree roots grow upward to the surface, permeating the litter layer

2006-09-25 12:49:53 · answer #5 · answered by Anonymous · 1 1

They filter the majority of carbon from the atmosphere

2006-09-25 12:45:55 · answer #6 · answered by el bastard sanchez 2 · 0 1

Is this a homework question? You better go back and read the chapter yourself!

2006-09-25 12:46:12 · answer #7 · answered by Brooke's Mommy 3 · 1 1

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