In biology, a mutation is a permanent change of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements.
Salinity is the saltiness or dissolved salt content of a body of water (see also soil salinity).onceptually the salinity is the quantity of dissolved salt content of the water. Salts are compounds like sodium chloride, magnesium sulfate, potassium nitrate, and sodium bicarbonate which dissolve into ions.
Changes in salinity levels can also affect the abundance and solubility of some minerals, particularly the major ionic species. The ionic composition of water âmodifies the way biota respond to high salinities,â and may also have a slight effect on water acidity (Nielsen et al., 2003).