Decay Processes

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  • Created by: Zaeema_
  • Created on: 13-03-16 19:10

Decay Processes

Detritus feeders start the process by eating dead animals and producing waste materials.

(http://seedbed.com/files/howardUP.jpg)

Decomposers digest everything, using some of the nutrients to grow and reproduce.

(http://seedbed.com/files/howardUP.jpg)

They produce waste products - CO2, water and nutrients.

(http://seedbed.com/files/howardUP.jpg)

This recycling means the soil contains mineral ions plants need to grow and clean up dead organisms.

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Conditions for decay

Warm - chemical reactions in microorganisms work faster when warm, reactions slow down and stop if too cold and enzymes denature if too hot.

(http://www.clker.com/cliparts/s/y/s/q/h/R/cartoon-sun-hi.png)

Moist - easier to dissolve foods, prevents drying out and microorganisms work better.

(http://b86a38.medialib.glogster.com/media/18b98963cad88cb515d40019f4383a2e56e17c62b02b2dbb0cacb5d9320d8420/waterdrop-cartoon.jpg)

Plenty of O2 - decomposers respire and need O2 to release energy. 

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Using decay

Decay helps to recycle resources:

1. Sewage treatment plants

2. Compost heaps

3. Fertiliser

Advantages:

1. Reduces landfill

2. Better for environment

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