A factory discharge a substances rich in nitrates in lake. How its is going to effect population fish in lake. Justify your answer
Answers
Answer:
It will cause Eutrophication.
Explanation:
Eutrophication is the process by which a body of water becomes overly enriched with minerals and nutrients which induce excessive growth of microorganisms.ex. algae and bacteria.
They consume high amount of dissolved oxygen in water.
As a result aquatic animals and plants die without oxygen and water becomes poisonous for aquatic live.
Answer:
After seeing the picture of children swimming in a sea of seaweed, you will surely wonder what strange phenomenon has hit the coast of Qingdao in eastern China. It is an abnormal growth of algae, a clear manifestation of a process called eutrophication.
“Eutrophication is an enrichment of water by nutrient salts that causes structural changes to the ecosystem such as: increased production of algae and aquatic plants, depletion of fish species, general deterioration of water quality and other effects that reduce and preclude use”. This is one of the first definitions given to the eutrophic process by the OECD (Organization for Economic Cooperation and Development) in the 70s.
Eutrophication is a serious environmental problem since it results in a deterioration of water quality and is one of the major impediments to achieving the quality objectives established by the Water Framework Directive (2000/60/EC) at the European level. According to the Survey of the State of the World’s Lakes, a project promoted by the International Lake Environment Committee, eutrophication affects 54% of Asian lakes, 53% of those in Europe, 48% of those in North America, 41% of those in South America and 28% of those in Africa (www.lescienze.it).
All water bodies are subject to a natural and slow eutrophication process, which in recent decades has undergone a very rapid progression due to the presence of man and his activities (so called cultural eutrophication).
The cultural eutrophication process consists of a continuous increase in the contribution of nutrients, mainly nitrogen and phosphorus (organic load) until it exceeds the capacity of the water body (i.e. the capacity of a lake, river or sea to purify itself) , triggering structural changes in the waters.
These structural changes mainly depend on 3 factors:
Use of fertilisers: Agricultural practices and the use of fertilisers in the soil contribute to the accumulation of nutrients. When these nutrients reach high concentration levels and the ground is no longer able to assimilate them, they are carried by rain into rivers and groundwater that flow into lakes or seas.