Ten threats to ocean health
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Ten Threats to ocean health. April 2012. Global climate change. Sea levels rise Temperature rises Storms, floods, weather Current patterns Coral bleaching. Ocean Acidification & Climate Change. C aused by increasing man-made carbon dioxide emissions Makes the ocean more acidic

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Ten Threats to ocean health

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Ten threats to ocean health

Ten Threats to ocean health

April 2012


Global climate change

Global climate change

  • Sea levels rise

  • Temperature rises

  • Storms, floods, weather

  • Current patterns

  • Coral bleaching


Ocean acidification climate change

Ocean Acidification & Climate Change

  • Caused by increasing man-made carbon dioxide emissions

  • Makes the ocean more acidic

  • Changes the chemistry of the sea and is harmful for many forms of marine life


Dead zones

Dead Zones

  • Swaths of ocean that don't support life due to a lack of oxygen

  • Growing at an alarming rate

  • Over 400 known to exist

  • Thought to be caused by global climate change and fertilizer/pesticide runoff


Pollution

Pollution

  • Over 80% of marine pollution comes from land-based activities

  • Oil Spills

  • Production waste

  • Marine Debris

    • GPGP

  • Shipping


Overfishing

Overfishing

  • When the amount of fish caught is more than the amount of fish needed to sustain fish stocks in a given region

  • Disrupts the food chain

  • Bycatch‚Äď unintentional captures


Irresponsible fish farming

Irresponsible Fish Farming

  • Supposed to respond to overfishing

  • Poorly managed operations

  • Nutrient and chemical pollution released into environment

  • Accidental release of farmed fish is also damaging

  • Unregulated


Invasive species

Invasive Species

  • From:

    • Illegal Aquarium trade

    • Irresponsible aquarium owners

    • Release of foreign bait

    • Traveling Ships

  • Displace native species

  • Diminishes biodiversity


Resource extraction coastal development

Resource Extraction & Coastal Development

  • Mangrove destruction

  • Habitat loss

  • 25% of all species may be extinct by 2050

  • Tourism

  • Offshore drilling

    • Chemicals like mercury, arsenic, and lead also come up with the oil

    • Seismic waves used harm marine life

    • Infrastructure erodes coastline


Shark finning whaling

Shark Finning/Whaling

  • Affects everything

  • 50-100 million killed each year

    • Bycatch

    • Hunted

  • When finned sharks are thrown back still alive and bleed to death

  • They reproduce too slowly for populations to recover


Mercury poisoning

Mercury Poisoning

  • Coal plants

  • Ends up in the food we eat

  • Already contaminated water in all 50 states

  • Biomagnification

  • Tuna


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