Friday, March 8, 2013
Salmon
The effects of pollution on salmon
Facts
*Sock-eye salmon are the most sensitive to low p.h waters
*18 miles of river was lost/deemed dead because of the acid waters
*The current Alaska water quality standard requires a pH between 6.5 and 8.5
*pH less than 4.5: All salmon and other fish species will die or be displaced from a water body.
*An acceptable alkalinity level for salmon culture is in the 40 to 100 ppm range
*pH levels of 7.0 to 8.0 are considered optimal to maintain a productive ecosystem
*If pH falls below the tolerance range even for a short period, death can occur
*when having acidy waters prey species for salmon drop significantly.
Vocabulary
logarithm -A quantity representing the power to which a fixed number (the base) must be raised to produce a given number.
macro-invertebrates- small bugs with no backbone
acidification- the process of making waters have more acids In them
conductance- the degree to which an object conducts electricity.
Pictures
Wednesday, May 23, 2012
Monday, December 5, 2011
Tuesday, April 26, 2011
Friday, April 8, 2011
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