Water bloom and red tide are two different ecological phenomena, but their formation is related to the reproduction of microorganisms in water.
1. Bloom: This is a natural ecological phenomenon in fresh water, mainly caused by algae, such as cyanobacteria, green algae and diatoms. Water bloom is a characteristic of water eutrophication, which is mainly due to the fact that wastewater containing a large amount of nitrogen and phosphorus in life and industrial and agricultural production enters the water body, resulting in a large number of algae reproduction.
2. Red tide: Red tide is not always red, including water bloom in fresh water system, general red tide in the ocean, and newly defined brown tide (Trollius chinensis) and green tide (Enteromorpha prolifera) in recent years. Red tide is an abnormal phenomenon in marine ecosystem, which is caused by the explosive reproduction of red tide algae in algae family under specific environmental conditions. Depending on the species and quantity of organisms that cause red tides, water bodies may show different colors.
Brief introduction of red tide
Red tide is also called red tide. The phenomenon of abnormal color of seawater caused by explosive rapid reproduction of plankton in the ocean. Similar phenomena also occur in rivers and lakes, which are often called splashes or blooms. Red tides are not all red. Different plankton cause different colors of seawater. Red tide is just a general term for all kinds of color tides. Excessive nutrient elements lead to algae proliferation, and hypoxia is the main cause of red tide. Trace elements such as iron and manganese, and some organic substances are important incentives for the mass reproduction of red tide organisms.
Due to the increasingly serious marine pollution, the frequency of red tides is becoming more and more frequent, especially in bays and coastal waters. Red tide is a signal of marine pollution. During the red tide, a large number of rivers, fish, shrimp, crabs and shellfish died, which caused great damage to aquatic resources and formed sediments, which seriously affected the harbor construction. The effective measures to prevent red tide are to prevent nutrient pollution, especially to control a large number of nutrient elements such as nitrogen and phosphorus from entering the water body.