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Marine Aquatic Biomes definitions

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  • Intertidal Zone
    Coastal area between high and low tides, experiencing both air exposure and submersion twice daily, supporting specially adapted organisms.
  • Marine Pelagic Zone
    Vast open ocean biome, spanning from the surface to just above the ocean floor, covering about three-quarters of Earth's surface.
  • Coral Reef
    Complex underwater structures formed by calcium carbonate exoskeletons of coral polyps, known for exceptional biodiversity.
  • Marine Benthic Zone
    Ocean floor region, ranging from shallow to deep areas, often nutrient-rich due to accumulation of decomposing biomass.
  • Tidal Pool
    Small water pocket in the intertidal zone, retaining marine life during low tide and replenished with nutrients and oxygen at high tide.
  • Sunlight Gradient
    Variation in light intensity with ocean depth, with high levels at the surface and complete darkness in deeper waters.
  • Nutrient Gradient
    Increase in nutrient concentration with ocean depth, primarily due to sinking and decomposition of surface biomass.
  • Biomass Gradient
    Decrease in living organic matter as ocean depth increases, with most biomass concentrated near the surface.
  • Oxygen Gradient
    Decline in dissolved oxygen levels as depth increases, affecting the distribution of marine organisms.
  • Coral Polyp
    Small aquatic animal that secretes calcium carbonate, building the foundational structure of coral reefs.
  • Calcium Carbonate
    Mineral compound secreted by coral polyps, forming the sturdy exoskeletons that make up coral reefs.
  • Hydrothermal Vent
    Deep-sea opening in the benthic zone emitting chemical-rich fluids, supporting unique ecosystems independent of sunlight.
  • Detritus
    Decomposing organic matter from dead organisms, accumulating on the ocean floor and enriching benthic habitats.
  • Marine Snow
    Continuous fall of organic particles from upper waters to the ocean floor, delivering nutrients to deep-sea environments.
  • Biodiversity Hotspot
    Area with exceptionally high species richness, such as coral reefs, supporting complex and productive ecosystems.