There are two main types of aquatic ecosystems: freshwater and saltwater. Freshwater ecosystems include lakes, rivers, and wetlands, and are characterized by factors like light, dissolved gases, and temperature. Saltwater or marine ecosystems make up the oceans and coastal waters, and are regulated by light, salt levels, temperature, and currents. They contain a diversity of life including phytoplankton, invertebrates like jellyfish and coral, and vertebrates like fish and marine mammals. Estuaries are transitional ecosystems where freshwater mixes with saltwater from the ocean.

4. SALTWATER
SALTWATER
SALTWATER
FRESHWATER
FRESHWATER
FRESHWATER
FRESHWATER

6. There are two types of aquatic ecosystems:
•Freshwater or inland ecosystems.
•Saltwater or marine ecosystems.

7. Inland or freshwater ecosystems have important
factors such as: light, dissolved gases and
temperature.

8. freshwater ecosystems

9. freshwater ecosystems
Ecosystems of static water. They can be very
small like Cuicocha in Ecuador, or very big like
the Titicaca in Bolivia. Water plants and algae
grow on the surface.

10. freshwater ecosystems

11. freshwater ecosystems
They begin in the mountains and contain a lot of
oxygen. Plants grow on the rocks and fish are
abundant.

12. freshwater ecosystems

13. freshwater ecosystems
They are frequently flooded by fresh or
seawater. Lots of insects, birds and reptiles live
there.

15. Marine ecosystems provide human beings with great
quantities of food and other resources. Abiotic factors
that regulate these ecosystems are: light, dissolved salt,
temperature and ocean currents. These ecosystems are:

16. Marine ecosystems

17. Marine ecosystems
Large algae and microscopic plants produce the greatest
amount of oxygen on the planet by photosynthesis. It is
the home of invertebrates like jellyfish, anemones,
starfish, coral and octopuses (octopi), and vertebrates
like fish and marine mammals.

18. Marine ecosystems

19. Marine ecosystems

20. Marine ecosystems

21. Marine ecosystems
Microscopic plants
(Phytoplankton)

22. Marine ecosystems

23. Marine ecosystems

24. Marine ecosystems

25. Marine ecosystems

26. Marine ecosystems

27. Marine ecosystems
Salinity in this ecosystem is less than that of the
ocean.

28. Marine ecosystems

29. Marine ecosystems
An estuary is a partially enclosed body of water along the coast
where freshwater from rivers and streams meets and mixes with
salt water from the ocean.
A very large biological productivity and
biodiversity is found in this ecosystem.

30. Marine ecosystems

31. Marine ecosystems
They are formations produced from the remains
of living things in tropical water that gather in
colonies of corals. There are fish, crabs, starfish,
urchins and others.

33. An ecosystem should have living things that
interact among themselves and with the non-living
factors such as the sunlight, water, air and
soil.
MARINE ECOSYSTEM INLAND ECOSYSTEM

35. Do you think that a swimming pool is an
ecosystem?