all about ecosystems

What is an ecosystemScales of an ecosystemLevels of organisation of an ecosystemWhat is a biomeWhat is a food chainTrophic levels of an ecosystemThe Carbon CycleThe nitrogen cycleImportant ecosystem terminology

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DESERT
| AQUATIC | FOREST | GRASSLAND | TUNDRA


What is a biome?

Biomes are very large ecological areas on the earth’s surface, with fauna and flora (animals and plants) adapting to their environment. Biomes are often defined by abiotic factors such as temperature, climate, relief, geology, soils and vegetation.

A biome is NOT an ecosystem, although in a way it can look like a massive ecosystem. If you take a closer look, you will notice that plants or animals in any of the biomes have special adaptations that make it possible for them to exist in that area. You may find many units of ecosystems within one biome.

There are five major categories of biomes on earth. In these five, there are many sub-biomes, under which are many more well defined ecosystems.


Note that there may be more than five classifications of biomes, because scientists classify biomes in slightly different ways. For example, Aquatic biome may be classified into two: Marine Biome and Fresh Water Biome. Both will have very clear similarities and differences, but as you can tell, they are all aquatic biomes. In a similar way, scientists may consider different forests as different biomes.

Let us take a quick look at each of these biomes below:

The Desert Biomes:
They are the Hot and Dry Deserts, Semi Arid Deserts, Coastal Deserts and Cold Deserts. DESERT>>

The Aquatic Biomes:
Aquatic biomes are grouped into two, Freshwater Biomes (lakes and ponds, rivers and streams, wetlands) and Marine Biomes (oceans, coral reefs and estuaries). AQUATIC>>

The Forest Biomes:
There are three main biomes that make up Forest Biomes. These are the Tropical Rainforest, Temperate and Boreal Forests (also called the Taiga) FOREST>>

The Grassland Biomes:
There are two main types of grassland biomes: the Savanna Grasslands and the Temperate Grasslands.
GRASSLAND>>

The Tundra Biomes:
There are two major tundra biomes—The Arctic Tundra and the Alpine Tundra. TUNDRA>>

Biomes play a crucial role in sustaining life on earth. For example, the Aquatic biome is home to millions of fish species and the source of the water cycle. It also plays a very important role in climate formation. The terrestrial biomes provide foods, enrich the air with oxygen and absorb carbon dioxide and other bad gases from the air. They also help regulate climate and so on.

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