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WorksheetsIndicator Species
Total questions: 14
Worksheet time: 7mins
What is an indicator species?
environmental indicators that offer an early signal of evironmental degradation or change.
any animal with a backbone and large enough to see without the aid of a microscope
plants that have adapted to living in harsh environments
microscopic, single-celled organisms that thrive in diverse environment
Species indicators show whether there is pollution in an area?
True
False
Only In cites
Only where an indicator species is present
Which of these is a species indicator?
Benthic macroinvertebrates
Sulpher Dioxide
earthworm
house cat
A life form that is very sensitive to environmental changes in its ecosystem. They can give us early-warning messages that a habitat is suffering.
Indicator Species
Flagship Species
Predators
Ecosystem Engineers
Indicator species usually are large animals?
True
False
Not animals only plants
What is a disadvantage of using indicator species as a method of determining levels of pollution
Requires specialist equipment
Time consuming
Difficult to do
Does not tell us how much pollution there is
Lichen is high in areas of...
High air pollution
Low air pollution
Medium pollution
No pollution
What types of lichen are there?
Crusty, leafy, and skinny
Crusty, leafy, and shruby
Crusty only
There are no types
These organisms only survive in very clean water
red tailed maggots and sludgeworms
Mayfly larvae and stonefly nymph
caddis fly larva and freshwater shrimps
water louse
Which of the following is a reason why freshwater macroinvertebrates are used as indicator species?
They are found in all aquatic habitats.
They are often diffulcult to collect.
None are capable of tolerating pollution.
Often live for less than one week.
Which is a better indication of the water quality, the number of organisms (for example 12 crayfish are found at one site) or the type of organisms (water penny larvae are found with lots of lunged snails and leeches) found at a site?
number of organisms
the type
neither are important
Why are frogs used as an indicator species.
They breath and take in water through their skin, meaning that anything in the environment is easily absorbed
They eat insects.
They spend most of their time in the water.
All of the above.
Which of the following is an example of using indicator species?
In restoring a wetland, researchers will monitor for Egrets, storks and ibises. If egrets are in the area, they knew that restoration efforts were not successful where as, storks and ibises meant restoration efforts were successful.
In monitoring a forest plot researchers find 30 species they know the area is healthy.
In monitoring a stream in researchers find the water is 10 degrees and has a low flow rate.
All of the above.
