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write the effects of temperature on theorganisms adapted in a lake and pond in a tabular form

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Answered by Rajesh595
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Biology

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Write the effect of temperature on the organisms adapted in a lake and pond in a tabular form?

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 by Pavansai772305.02.2018

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writersparadise 

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Most of the organisms that are affected by the change in temperature are poikilothermic animals. The external temperature of their surroundings affects their internal temperature and thus, causes changes in their metabolic activities.

Organisms which can tolerate a wide range of temperatures are called as Eurotherm and the organisms that have a narrow tolerance range of temperatures are called as stenotherms.

As the temperature of water goes 4°C, the density of water decreases. So, this causes a decrease in the buoyancy of the plankton and they tend to sink with increasing temperature of the water.

The reproductive life of the fishes is most commonly affected by the temperature changes. Trout fish reproduces at a temperature of 3 - 14°C. However, when the temperature is above 24°C, it becomes lethal for the fish.

The optimal growth temperature of Carp fish is in between 20 - 30°C.

Many aquatic animals tend to change their colour with changes in the temperature. The animals that are active during the cold season are usually dark in colour.


Answered by roysten07
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Temperature is one of the major factors affecting freshwater ecosystems. Compared with others systems it has a high heat storage capacity, which means that between the seasons there is a minimum of impact compared with terrestrial ecosystems. However, the main effects of temperature are:

1. Distribution of organisms both seasonally and vertically through the water

2. Behaviour and reproduction of organisms

The reason that organisms are affected by temperature is largely due to the fact that they are cold blooded or poikilothermic. The external environment will determine their internal temperature and therefore metabolic activity.

Above 4 degrees celcius the density of water get progressively less. The most noticable effect of this will be on the plankton. Increases in temperature above 20 degrees will make them considerably less buoyant and they will be more likely to sink. Most aquatic invertebrates are sensitive to changes in temperature and therefore density. Being cold-blooded their metabolic rate will slow down as the temperature drops. Those needing to be active early in the year may be dark in colour. The large red damselfly is one of the first insects to emerge in the spring. It has a great deal of black on the body and a melanic (dark) form is fairly common. This will absorb a maximum of warmth.

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