Ocean Depth Zones

Each depth zone creates unique conditions that shape the ecosystems within

Sunlight Zone (0-200m)
Twilight Zone (200-1000m)
Midnight Zone (1000-4000m)
Abyssal Zone (4000-6000m)
Hadal Zone (6000m+)

Major Ocean Ecosystems

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Coral Reefs

Tropical shallow waters

Biodiversity hotspots often called the "rainforests of the sea." Built by coral polyps over thousands of years, these structures provide habitat for approximately 25% of marine species.

Primary Producers: Zooxanthellae algae
Key Species: Corals, reef fish, crustaceans
Unique Feature: Symbiotic relationships
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Kelp Forests

Cold temperate waters

Underwater forests formed by large brown algae. These ecosystems are among the most productive on Earth, growing up to 18 inches per day and providing shelter for numerous marine species.

Primary Producers: Giant kelp
Key Species: Sea otters, sea urchins, fish
Unique Feature: Rapid growth rate
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Open Ocean

Pelagic zone worldwide

Covering over 90% of the ocean's volume, this vast ecosystem is home to migratory species and complex food webs. Nutrient availability varies greatly by depth and location.

Primary Producers: Phytoplankton
Key Species: Whales, tuna, squid
Unique Feature: Vertical migration
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Deep Sea

Below 200 meters

Characterized by complete darkness, high pressure, and cold temperatures. Life here has evolved remarkable adaptations including bioluminescence and extreme pressure tolerance.

Primary Producers: Chemosynthetic bacteria
Key Species: Anglerfish, tube worms, giant squid
Unique Feature: Hydrothermal vents
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Mangrove Forests

Tropical coastal regions

Salt-tolerant trees that form dense coastal forests. These ecosystems serve as crucial nursery grounds for many marine species and provide coastal protection from storms.

Primary Producers: Mangrove trees
Key Species: Juvenile fish, crabs, birds
Unique Feature: Salt filtration systems

Interconnected Systems

How ocean ecosystems interact and depend on each other

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Nutrient Cycling

Deep sea upwelling brings nutrients to surface waters, supporting phytoplankton growth that forms the base of marine food webs.

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Species Migration

Many species move between ecosystems seasonally, connecting distant habitats through their life cycles.

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Climate Regulation

Oceans absorb heat and CO2, with different ecosystems playing unique roles in global climate regulation.

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Water Filtration

Coastal ecosystems like mangroves and oyster reefs filter pollutants and improve water quality for adjacent habitats.

Ocean Food Web

Interactive visualization of energy flow through marine ecosystems