Saturday 3 November 2012

Pollution Indicators

Pollution Indicators:

The more pollution caused the more harm there is to habitats.Indicator species are organisms that are so sensitive to polluting chemicals that we use them to help show us the presence of pollution. E.g. Blackspot fungus are when roses are infected and killed by sulfur dioxide in the air.

Lichens are mutualistic relationship between a fungus and alga, different species of lichens are affected differently by air pollution, so they can be used as pollution indicators.

Different animals that live in water need different amounts of oxygen. E.g. Stonefly larvae and freshwater shrimps need lots of oxygen whereas bloodworms and sludgeworms need little.

The UK produces a lot of waste which ends up being buried in landfill sites. There is a risk of pollution which means materials can't be used again. We're in danger of running out of some raw material.

Recycling is taking materials out of waste and converting them into new products that we can use:

  • Metals can be melted down and recycled as new drinks cans or part of a car
  • Paper can be recycled as more paper or cardboard
  • Plastic bottles can be recycled as fleece clothing.


Key Words:

Indicator species
Blackspot fungus
Lichens
Stonefly larvae 
Freshwater shrimps
Bloodworms
Sludgeworms
Recycling

Questions:

1. What is indicator species?
2. Why is clean air not good for rose growers?
3. Why do animals need oxygen?
4. What are the advantages of recycling?

What you should Know:

An understanding of how scientists can use the presence or absence of indicator species as evidence to assess the level of pollution:
a. polluted water indicator - bloodworn, sludgeworm
b. Clean water indicator - stonefly, freshwater shrimps
c.air quality indicator - lichen species, blackspot fungus on roses

An understanding of how recycling can reduce the demand for resources and the problem of waste disposal, including paper, plastics and metals.


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