Suppose that the local temperature changes in favor of greater oxygen levels in the water. Write a short paragraph to describe how both the population of the small fish species and wading bird population would change in response to the new oxygen levels over the next six months. Then explain why these changes occur.

I'm not exactly sure what the answer to this would be but here's my theory;

So for the oxygen levels to increase in the water, then the temperature would have to decrease. If the temperature decreases a lot, then the small fish will probably die in the cold temperatures or adapt to it. It generally would be harder for the small fish to survive. If many of them die then there won't be as much food for the wading birds, since they eat fish. Therefore I think that if the oxygen levels increase in the water, then the population of small fish and wading birds would decrease.

So is my answer correct, any other thoughts? Thanks! (=

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1. Hey, can someone please hurry and check my answer? I would appreciate it a lot!

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posted by Scarlet
Decreasing temps>>increased solubility of gases
however, decreasing temps>>lower respiration and life functions in fish, like growth and reproduction.
Increasing temp (as in daylength, sun light)>>increased plant growth>> increased oxygen levels being generated. When is it cold, plants in water do not grow.

I suggest you read this summary of current studies:
http://www.fs.fed.us/rm/boise/AWAE/projects/stream_temp/blogs/45Part4_MechanismsOfChange_TemperatureDegreeDaysAndFishDevelopment.pdf

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posted by bobpursley
3. Ok thanks! (=

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posted by Scarlet

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