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| − | {{Definition| title = Indicator species
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| − | | definition = A species whose presence or absence indicates a certain environmental condition or a particular community or habitat.}}
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| − | ==Examples==
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| − | * Greasewood indicates saline soil;
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| − | * Mosses often indicate acid soil;
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| − | * Tubifex worms indicate oxygen-poor and stagnant water unfit to drink;
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| − | * ''Ammophila arenaria'' requires blown sand to thrive and will begin to die back if sheltered from further accommodation. Thus it is a good indicator of sediment supply to the system<ref>UK Government 2004. Common Standards Monitoring Guidance for Sand dune Habitats. http://data.jncc.gov.uk/data/7607ac0b-f3d9-4660-9dda-0e538334ed86/CSM-SandDuneHabitats-2004.pdf</ref>.
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| − | [Comment: The last example can be confusing; ''A. arenaria'' also occurs on retreating coasts.]
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| − | ==Related articles==
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| − | :[[Seagrass recovery and restoration in the Wadden Sea]]
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| − | :[[Common starfish can act as a bioindicator for heavy metal pollution]]
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| − | :[[Harbour porpoise in the Belgian part of the North Sea]]
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| − | ==References==
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| − | <references/>
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