Ecosystems can be divided in two main groups: aquatic ecosystems and terrestrial ecosystems.



AQUATIC ECOSYSTEMS

An aquatic ecosystem is an ecosystem in a body of water. There are two main aquatic ecosystems: freshwater and saltwater.

  1. Freshwater ecosystems: rivers, lakes and ponds.
  2. Saltwater ecosystems: seas and oceans. They incluide 3 main zones:

  • The coast: includes water and land. The water is warm. There are lots of nutrients in the coast, so many animals and plants can live there.

  • The open sea: there is a lot of sunlight, so there is lot of food for animals like whales, dolphins, sharks, tuna...

  • The deep sea: there is little sunlight, so there is little food. A few animals live there.

Saltwater Ecosystem Zones - Wikipedia.org.png
IMAGE FROM WIKIPEDIA.ORG


TERRESTRIAL ECOSYSTEMS

A terrestrial ecosystem is an ecosystem on land. All terrestrial ecosystems depend on temperature and water. Basic classification:

  • High temperature and low precipitations: deserts. There is little vegetation, so there are a few animals.

  • Warm temperature and regular precipitations: forests. There is a lot of vegetation (especially trees), so there are a lot of animals too.

  • Low temperature and regular precipitations (snow): tundra. The vegetation is poor: lichens, grass and bushes. There are a few animals and in winter they have to migrate south, where the temperture is warmer.



What about watching a couple of videos to ease all this information?


The first video is about aquatic ecosystems.




The second video is about terrestrial ecosystems.






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