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World Ecosystems

An ecosystem includes all of the living things (plants, animals and organisms) in a given area, interacting with each other, and also with their non-living environments (weather, earth, sun, soil, climate, atmosphere). These plants and animals depend on each other to survive. 




Disruptions to an ecosystem can be disastrous to all organisms within the ecosystem. For example, consider what happens when a new plant or animal is introduced into an ecosystem where it did not before exist. The new organism competes with the natural organisms from that location for available resources. These unnatural strangers can push other organisms out, causing them to become extinct.

Here you can watch some invading species which made their home in an ecosystem where they had never existed before ...

 Giant Catfish in the Ebro River

 Zebra Mussel 

 Argentinian Parrots have settled in many spanish parks and green zones.

Throughout the history of the Earth, the balance in ecosystems has been disrupted by natural disasters such as fires, floods, storms, volcano eruptions, and so. In recent years, however, humans have been affecting the many ecosystems around the world.


2 comentarios:

Anonymous said...

Más vale que retiren a esos bichos para que no se terminen acabando con los ecosistemas, porque están acabando con los peces, algas y ortos pajaros
:( :( :( :(

Anonymous said...

I recomend this page:
http://www.juegos-geograficos.com/juegos-geografia-Comunidades-de-Espana-_pageid92.html