lecture: aquatic ecosystems

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Page 1: Lecture: Aquatic Ecosystems

Pgs.  268-­‐301  

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Oceans   1,370,000   97.61  Ice     29,000   2.08  

Ground  H20   4000   0.29  Fresh  Lakes   125   0.009  Salt  lakes   104   0.008  

Soils   67   0.005  Rivers   1.2   0.00009  

Atmosphere   14   0.0009  

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a)  Intertidals  b)  Estuaries  c)  Lagoons  d)  Deep  seas  e)  Coastal  areas  of  marshes,  swamps,  and  coral  

reefs  

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“It’s shrinkage. I was in the pool!”

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Lake Type How often does it mix? Where is it found?

How is this one unique…

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LAKE  NYOS

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"I could not speak. I became unconscious. I could not open my mouth because then I smelled something terrible . . . I heard my daughter snoring in a terrible way, very abnormal . . . When crossing to my daughter's bed . . . I collapsed and fell. I was there till nine o'clock in the (Friday) morning . . . until a friend of mine came and knocked at my door . . . I was surprised to see that my trousers were red, had some stains like honey. I saw some . . . starchy mess on my body. My arms had some wounds . . . I didn't really know how I got these wounds . . .I opened the door . . . I wanted to speak, my breath would not come out . . . My daughter was already dead . . . I went into my daughter's bed, thinking that she was still sleeping. I slept till it was 4:30 p.m. in the afternoon . . . on Friday. (Then) I managed to go over to my neighbors' houses. They were all dead . . . I decided to leave . . . . (because) most of my family was in Wum . . . I got my motorcycle . . . A friend whose father had died left with me (for) Wum . . . As I rode . . . through Nyos I didn't see any sign of any living thing . . . (When I got to Wum), I was unable to walk, even to talk . . . my body was completely weak."

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Before  and  after  photo.  

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