Páginas: 19 (4579 palabras) Publicado: 11 de marzo de 2012

The research is intended to define what is a biome, what are the biomes in the world and its distinctive climates. It will expose what are the different species of flora and fauna that live in each biome and how human activity affects the balance of these ecosystems. Besides the importance of creating an awareness of conservation of these natural areas and nests of life, forfuture generations.

General objective:
* Explain what is a biome, different types of biomes in the world, their main characteristics and the importance of environmental preservation.
Especific objectives:
* Expose the different biomes of the world, their specifications and weather conditions, and also plants and animals that live in each region.
* Inform people about theconsequences of our actions, we all must have a better understanding of how to preserve nature.

What is a Biome?
A biome is a large geographical area of distinctive plant and animal groups, which are adapted to that particular environment. The climate and geography of a region determines what type of biome can exist in that region. Major biomes include deserts, forests, grasslands, tundra, andseveral types of aquatic environments. Each biome consists of many ecosystems whose communities have adapted to the small differences in climate and the environment inside the biome.
All living things are closely related to their environment. Any change in one part of an environment, like an increase or decrease of a species of animal or plant, causes a ripple effect of change in through otherparts of the environment.
The earth includes a huge variety of living things, from complex plants and animals to very simple, one-celled organisms. But large or small, simple or complex, no organism lives alone. Each depends in some way on other living and nonliving things in its surroundings.
To understand a world biome, you need to know:
* What the climate of the region is like.
* Whereeach biome is found and and what its geography is like.
* The special adaptations of the vegetation.
* The types of animals found in the biome and their physical and behavioral adaptations to their environment.
Ecological Relationships of Biomes
The survival and well being of a biome and its organisms depends on ecological relationships throughout the world. Even changes in distantparts of the world and its atmosphere affect our environment and us. The eruption of a volcano in Mexico, or Southeast Asia can bring the temperature of the whole world down a few degrees for several years.
Biomes are classified in various types:

The Tundra Biome
-40°C to 18°C
150 to 250 mm of rain per year
Almost no trees due to short growing season andpermafrost; lichens, mosses, grasses, sedges, shrubs
Regions south of the ice caps of the Arctic and extending across North America, Europe, and Siberia (high mountain tops)
Tundra comes from the Finnish word tunturia, meaning "treeless plain"; it is the coldest of the biomes

The tundra is the coldest of the biomes. It also receives low amounts of precipitation,making the tundra similar to a desert. Tundra is found in the regions just below the ice caps of the Arctic, extending across North America, to Europe, and Siberia in Asia. Much of Alaska and about half of Canada are in the tundra biome. Tundra is also found at the tops of very high mountains elsewhere in the world. Temperatures are frequently extremely cold, but can get warm in the summers.Tundra winters are long, dark, and cold, with mean temperatures below 0°C for six to 10 months of the year. The temperatures are so cold that there is a layer of permanently frozen ground below the surface, called permafrost. This permafrost is a defining characteristic of the tundra biome. In the tundra summers, the top layer of soil thaws only a few inches down, providing a growing surface for the...
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