Characteristics of Good Indicator Organisms?

About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.

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Characteristics of Good Indicator Organisms?

Post by Entropy » Sun Oct 28, 2012 5:53 pm

I need to determine why good indicator organisms are present in low numbers - <1% of the total population. I've tried researching, but most websites discuss why indicator organisms should be present in high concentrations (relative to pathogenic bacteria). Why do they need to be present in such low numbers? Is it related to sensitivity? Thanks so much in advance.

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Post by choozi » Sun Oct 28, 2012 6:38 pm

As far as i know, Indicator organisms are itself non-pathogenic. It should be greater in number as compared to Pathogens (in fecal sample) so that you could easily determine whether your water sample is fecal contaminated or not. To detect either water is potable or fit for drinking, you tried to find the indicator organism in your water sample. If the number of indicator organism is extremely low. It shows your water is fit for drinking.

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Re: Characteristics of Good Indicator Organisms?

Post by hilljason » Sat Jun 01, 2013 6:53 am

Characteristic of a good indicator organism are:
1.It should be sensitive to change in ecosystem integrity through space and time.
2.It should be easily measured and informative.
3.Its response to changing ecosystem integrity should be consistent in time and space.
4.It should be better than or complementary to other potential indicators.
Last edited by JackBean on Sat Jun 01, 2013 9:42 am, edited 1 time in total.
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