When an alien species (plant or animal) that does not belong to an ecosystem is introduced, it spreads and competes with the native plants for space and nutrients and becomes problematic in the absence of natural enemies. These intruders are called invasive alien species.
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Among the various options given regarding the negative impact of water hyacinth (Eichhornia crassipes) on ecological and marine life, the correct options are listed below;
Domination and phasing out of fish and other native species.
Change in the water quality with respect to the dissolved oxygen and the water pH due to release of CO2 .
Starving the water of oxygen.
Desilting of the water
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