Bioindicators

A bioindicator is organism that give us a clue of the health of its ecosistem Some organisms are very sentive to pollution in their environmet, so if pollutans are present, the organims may change its morphologypysiology or behaviour, or it could even die.

The mycroalga isn't usual, is an excellent bioindicator organism and it's very sensitive to any change in ecosystem. Staurastrum arctiscon lives in acid waters without organic matter like in the Black Loch in Soria.

Another living bioindicator is Tabellaria however this it’s very common and it’s an excellent bioindicator in aquatic systems.

There are more living bioindicators like Tradescantia, it is too sensitive to pollution from automobile and factory gases.

Our Water Footprint

This is a bar graph of our total water footprint, the average of water that we used during a year.

The first column shows the average of water that we used during a year in food. The second shows the quantity of domestic (washing machine, wash disher, the garden…). The third column is the water in the  industry for example, to manufacture objects. The last column indicates the total of the average that we consume during a year, 1074 cubic meter.

There are three water footprints:

*Green water footprint. Is water from precipitation that is stored on the floor and then it evaporates. It is important at the farmings.

*Blue water footprint. Is the water that we get from the underground , then the water evaporates. Then, the water is incorporated in one body and then it goes to another. The blue water footprint is at the irrigated agriculture, industry and in the domestic use.

*Blue water footprint. Is the quantity of sweet water necessary to assimilate pollutants to meet specific water quality standards.