1. ALGAL BLOOMS
PRESENTED BY :- SIMRON AND AMAN MISHRA
M.SC. ZOOLOGY(1ST YEAR) SESSION:-2022-2024
REG. NO:-220705180008 SECTION:-A
SCHOOL OF APPLIED SCIENCE
WATER AND SOIL MANAGEMENT IN AQUACULTURE
CODE-1443
2. INTRODUCTION
An algal bloom is a rapid increase or accumulation in
the population of algae in fresh or marine water
system .
This is the rapid growth of unicellular algae and not
macroscopic .
Algal blooms is often recognised by discolouration in
the water from the algal pigments .
These are the result of a nutrients like nitrogen or
phosphorous from various sources.
An algal bloom affects the whole organism .
3. CAUSES OF ALGAL BLOOMS
Accumulation of large quantities of P and N.
Presence of dead organic matter .
High Temperature.
Slow moving water (algal blooms requires large
quantities of water.
4. TYPES OF ALGAL BLOOMS
Freshwater algal blooms .
Marine water algal blooms .
Harmful algal blooms .
FRESH WATER BLOOMS
They are the result of excess of nutrients particularly
some phosphorus.
Excess nutrients may originate from fertilizers that are
applied in land agricultural purpose.
Excess carbon and nitrogen have also been suspected as
causes.
5. when phosphates are released into water systems , higher
concentration cause increased growth of algae and plants .
Which gets decomposed gradually consuming dissolved
oxygen from the water which can lead in death of aquatic plants
and animals .
6. MARINE ALGAL BLOOMS
Turbulent storms churn the ocean in summer , adding
nutrients to sunlight waters near the surface.
This gives rise to massive blooms of phytoplankton .Tiny
molecules found inside these microscopic plants harvest vital
energy from sunlight during photosynthesis.
The highest the concentration of chlorophyll ,the larger of
blooms.
Observations show blooms typically lasts until late spring on
early summer.
7. HARMFUL ALGAL BLOOMS
An algal bloom that causes negative impacts to others organisms
via production of natural toxins , mechanical damage to others
organism as by other means .
The diversity of HABs are often large and threaten coastal areas.
These are associated with various types of shellfish poisonings
and other marine mortality events.
HABs have been proved harmful to humans as they too feed on
marine life .
This algal bloom is dense to cause water discolouration.
8. IMPORTANCE OF ALGAL
BLOOMS
As a source of oxygen
As a source of food
As an indicates of pollution
As a provision of habitat
HOW TO CONTROL ALGAL BLOOMS
Recycling and reusing the wastage so that it can work towards reducing
the overall nutrient towards reducing the overall nutreints load into the
water bodies and ease the water treatment process.
Optimal fertilizers application should be taught to farmers by
agriculture expects .
Proper sewage treatment.
9. Hydrogen peroxide is used which is suitable for small
water bodies such as ponds as small lakes .n ultrasonic
Ultrasound bloom treatment focuses ,on ultrasonic
sound waves in water bodies which reduce algal growth
by 90%.
Non –toxic phosphate free detergents soaps and
10. REFERENCES
Tett,P (1987). "The Ecophysiology of Exceptional
Blooms". Rapp. P. - v. Reun. Cons. Int.
Explor. Mer. 187: 47-60
https://www.epa.gov/nutrientpollution/ha
rmful-algal-blooms
11. ACKNOWLEDGEMENT
Special thanks to my subject teacher, Dr. Bikas School of
Applied Science , CUTM Bhubaneswar.
All the faculty members of Department of Zoology , School
of Applied Science , CUTM ,Bhubaneswar.
Family and Friends
