human impacts on marine ecosystems three main problems
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Human impacts on marine ecosystems Three main problems. 1. OVERPOPULATION . 2. Fisheries. Humans living near the coast have probably always used the ocean as a source of food. - PowerPoint PPT PresentationTRANSCRIPT
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Human impacts on marine ecosystems
Three main problems
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1. OVERPOPULATION
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2. Fisheries
• Humans living near the coast have probably always used the ocean as a source of food
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• With advances in fishing equipment, larger ships and new tracking technologies, many fish stocks around the world have reduced significantly.
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For example, some fishing techniques such as dredging and trawling can cause widespread damage to marine habitats and
organisms living on the sea floor.
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These techniques also often capture non-target species (known as bycatch) that are then discarded.
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3. POLLUTIONBy accident
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Pollution from human activities has major impact on the world’s marine ecosystems. Plastic refuse is one of the most
pervasive types of pollution.
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More than 80 million tons of plastics are estimated to be produced globally each year. These plastics are durable, requiring about 500 years to decompose in the ocean.
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How can we solve the problem?
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1. Overpopulation
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2. Overfishing:
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對學生來說我們怎麼可以讓環境” Pollution FREE”:
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We just have one world and its time to take care of it.