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Freshwater part 4 can support fresh water

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The salmon have arrived. This is the world's largest fresh water fish migration. Across the northern hemisphere salmon, returning from the ocean to their spawning grounds, battle their way for hundreds of miles upstream. The annual arrival of spawning salmon brings huge quantities of food into these high rivers that normally struggle to support much life. As rivers leave the mountains behind, they gradually warm and begin to support more life. Malawi may look like an inland sea, but it's dwarfed by 80 percent of its species are found nowhere else on Earth, including the world's only fresh water seal. The Amazon is so large and rich in fish that it can support fresh water dolphins. These botos are huge - two and a half metres long. In these murky waters they rely on sonar to navigate and hunt. They work together to drive shoals of fish into the shallows. Iguassu Falls on the border of Brazil and Argentina is one of the widest waterfalls in the world - one and a half miles across. In flood 30 million litres of water spill over every second. All the world's great broad waterfalls: Victoria, Niagara and here, Iguassu, are only found in the lower courses of their rivers.





Freshwater part 4 pictures


 
 

 
 

 
Planet Earth From Freshwater
Planet Earth Freshwater
  2 source of drinking water
2 source of drinking water
  3 journey in vast lakes
3 journey in vast lakes
  4 can support fresh water
4 can support fresh water