2006-07-27 01:26:39 · 6 answers · asked by sim 2 in Science & Mathematics ➔ Biology
Trees give off nitrogen in the evening, and oxygen in the day. Water makes them grow. Trees also prevent the rapid run off of the water, retaining the soil. But, trees don't make it rain.
2006-07-27 01:31:53 · answer #1 · answered by BuyTheSeaProperty 7 · 9⤊ 0⤋
Sorry people, very few trees are nitrogen fixers. It is the Mycorrhyzea that fixes nitrogen!! Nitrogen gas is not released in significant amounts either, oxygen is however.
The role of trees in runoff abatement is to stabilize the soil, by the roots and the slowing of the falling rain by the leaves and branches.
A secondary benefit is the absorption of water by the tree. As is the leaf litter which slows runoff, protects the soil and holds moisture.
2006-07-27 11:29:10 · answer #2 · answered by KLU 4 · 0⤊ 0⤋
1. Roots prevent soil erosion by holding onto the soil. Crown minimises impact of wind and rain.
2.Trees also reduce stormwater runoff, erosion, flooding and water pollution
3. Nitrogen fixation by the roots.
4. Carbon cycle.
2006-07-27 10:19:17 · answer #3 · answered by Shaun 1 · 0⤊ 0⤋
they absorb huge amounts of water preventing flooding and erosion . There were studies after forest fires and mining that the trees were lost or removed and it took a very long time for that small ecosystem to recover because there was nothing to soak up water and the land, bugs and smaller plants would drown and wash away.
2006-07-27 08:33:12 · answer #4 · answered by debra_har 4 · 0⤊ 0⤋
the roots of trees prevent the soil from being washed away by the rain. they help prevent erosion. trees also absorb rain/water which they need for food production and survival
2006-07-27 08:31:47 · answer #5 · answered by Anonymous · 0⤊ 0⤋
its mainly the root which retain the soil from being washed away and thus creating landslide
2006-07-27 08:35:02 · answer #6 · answered by ptikeur2 1 · 0⤊ 0⤋