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New species invasion


Eutrophication may cause the ecosystem competitive by transforming the normal limiting nutrient to abundant level. This cause shifting in species composition of ecosystem

Toxicity


Some algal blooms when die or eaten, release neuro & hepatotoxins which can kill aquatic organism & pose threat to humans. (e.g) Shellfish poisoning.

Depletion of dissolved oxygen level.


Increased incidences of fish kills & loss of desirable fish species & reduction in harvesting


Loss of coral reefs.


Decrease in water transparency and increased turbidity.


Affects navigation due to increased turbidity.


Colour (yellow, green, red), smell and water treatment problems.


Increased biomass of inedible toxic phytoplankton


Increase in bloom of gelatinous zooplankton


Increased biomass of benthic and epiphytic algae


Unsuitable for aesthetic recreation, and reduction in value of water body


Do you know?


The world’s tallest tree is a coast redwood in California, measuring more than 360 ft or 110 m.