Known as the" red ghost, red tide is also called “red”tide and
it is a kind of abnormal phenomenon in Marine ecological system.
It is formed by the red-tide algae family, which multiplies explosively
in particular environmental conditions.
Seaweed is a big family. In addition to some large algae, many are
often tiny plants and some are single-celled plants. According to
the cause of red tide species and different number, the sea sometimes
shows different colors such as yellow, green, brown.
Red tide is a complicated ecological anomaly and the reason is more complex.
The mechanism of the occurrence of red tide has not been determined.
But the principle condition of red tide is that the red tide creatures
reach a certain density. Otherwise, although other factors are appropriate,
there will be no red tide.
Under normal physical and chemical conditions, red tide creatures are
not much heavier than those in plankton and some of them are food for some fish
and shrimp. However, due to special environmental conditions, some red tide
organisms overreproduce, causing red tides to form.
The destruction of the sea ecological balance by red tide.
The ocean is a complex ecological system which is interdependent
and interactive with environment, organism and organism.
The material circulation and energy flow in the system are
in a state of relative stability and dynamic balance.
When the red tide occurs due to the abnormal explosive proliferation
of red tide organisms, this balance is seriously disturbed and
destroyed. In the early stage of plant red tide, the chlorophyll
a content increase, the pH increase, the dissolved oxygen
increase and the chemical oxygen consumption increase in the water body
of the red tide due to the photosynthesis of plants.
The change of environmental factors has caused some Marine life
to grow and reproduce abnormally, resulting in escape or even death
of some creatures and destroying the original ecological balance.