Classification depends mainly forests position, distance from equator, altitude and climate.
Tropical forests - all year round temperatures are high and precipitation. Tropical moist forests are found near the equator. In tropical forests there is a season of drought. Most trees have crown umbeliforma. Flowers in tropical forests are pollinated by insects, birds, animals. The wood structure of trees is excellent, being strong and tough, with high resistance.
Sub-tropical forests - are found north of the tropical forests. Trees are drought tolerant summer.
Temperate forests - are found in eastern North America, Asia, North-eastern, eastern and western Europe. Temperate forests are a mixed and coniferous species decidue. Seasons are well defined.
Mediterranean forests - are found south of temperate regions, the Mediterranean Sea coast, in California, Cs and Western Australia. Vegetative cycle is short and almost all trees and shrubs are evergreen, but in combination with coniferous and leafy trees fell.
Coniferous forests - are found in cold regions, near the poles. Conifers are adapted to drought.
Mountain forests - are found in the temperate zone, subtropical and tropical high altitude. Plants are adapted to withstand cold, rain and intense sun light. Conifers predominate.
Band e Amir, the first national park in Afghanistan
National Park consists of a series of six deep lakes separated natural dykes of rock rich in red travertine. This rock is found only in few places in the world.
Of NCAR scientists discovered that plants in a forest respond to stress by producing nuts in significant amounts to a form of aspirin.
Unlike humans, who are advised to take aspirin to decrease a temperature, plants and their ability to produce their own aspirin, leading to the formation of proteins that stimulate the biochemical defense system, says Thomas Karl, NCAR, which led study.
Drawings inspired by nature
Each draft of my plant's leaves and ends with a human face, because every man should be reflected in the beauty of nature.
Global warming, a false theory
'Global warming, a false theory' - and journalist says botanist David Bellamy.
In the last 10 years has increased the concentration of CO2 in the atmosphere of 5%, this phenomenon has no influence on global average temperatures.
Daffodil bulbs and snowdrops against Alzheimer's disease
A Bulgarian researcher found that bulbs of snowdrops population used to treat headaches. After several trials, isolated from bulbs of snowdrops picked alcaloizii and found an ingredient called acitv galantamine.