Question

how change in temperature of water bodies affect aquatic organisms

Answer 1

Hi there,
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Changes in temperature affect aquatic life. Temperature determines which organisms will thrive and which will diminish in numbers and size. For each organism there is a thermal death point. Also there is a range of temperature of that produces optimal abundance. The effects of temperature upon life of a cold blooded or poikilotherm are profound. Poikilothermic animals, such as fish, are those whose body temperatures follow closely the temperature of their medium.
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Answer 2

HI
I think that the answer is:

If the temperature of water bodies is really very hot then aquatic organisms might die or if the temperature of water bodies is really very cold only some adapted to cold organisms might live others might die ....