Salinity can affect the density of ocean water: Water that has higher salinity is denser and heavier and will sink underneath less saline, warmer water. This can affect the movement of ocean currents. It can also affect marine life, which may need to regulate its intake of saltwater.
How does salinity affect fish?
In larger fish, salinity is also a key factor in controlling growth. … Better growth at intermediate salinities (8-20 psu) is very often, but not systematically, correlated to a lower standard metabolic rate. Numerous studies have shown that 20 to >50% of the total fish energy budget are dedicated to osmoregulation.
How does increased salinity affect water?
Salts are less likely to be leached from the soil in low rainfall areas and therefore poor quality irrigation water with high levels of salts will have a greater impact on the soil. Excessive amounts of water applied by irrigation may move past the root zone and contribute to rising water tables.
How does salinity affect aquatic plants?
Increased salinity may suppress plant sexual and asexual reproduction, as well as reducing plant size and growth rate at low salinities and increasing mature plant death at higher salinities (Sim et al.
Why is salinity important in the ocean?
It is a strong contributor to conductivity and helps determine many aspects of the chemistry of natural waters and the biological processes within them. Salinity, along with temperature and pressure, helps govern physical characteristics of water such as density and heat capacity.
How does salinity affect ocean currents?
Since warmer water thus can hold more salt and other molecules than cold water; it can have a higher salinity. To relate this to ocean currents, the higher the salinity of ocean water, the more dense it becomes. When the salinity is high enough, the water will sink, starting a convection current.
Why does salinity vary in different seas and oceans?
Oceans can vary in salinity by deficiencies/overabundance of fresh water (evaporation/precipitation), as the measure of saltiness is given in the form of a concentration. Salt concentration varies as well because oceans do not stand still. … Search ocean biochemistry for more information.
What would happen if the salinity in the ocean decreased?
Because water with lower salinity is less dense, adding fresh water may affect ocean flows like the conveyor belt – a system of Atlantic currents that exchanges cold water in the Arctic region for warm water from the tropics.