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Marine Aquatic Biomes quiz #1

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  • What adaptations do organisms in the intertidal zone possess to survive the fluctuating conditions of exposure to air and submersion by ocean water?
    Organisms in the intertidal zone have adaptations such as tolerance to desiccation, ability to cling to surfaces to resist wave action, and mechanisms to cope with varying oxygen and nutrient levels due to periodic exposure to air and submersion by tides.
  • Why does the nutrient concentration increase with depth in the marine pelagic zone, while sunlight, oxygen, and biomass decrease?
    Nutrient concentration increases with depth in the marine pelagic zone because dead and decaying biomass from surface waters sinks to the ocean floor, bringing nutrients with it, while sunlight, oxygen, and biomass decrease due to reduced light penetration and less photosynthetic activity at greater depths.
  • What are coral reefs, and why are they considered biodiversity hotspots?
    Coral reefs are structures formed by the calcium carbonate exoskeletons of coral polyps in warm, shallow waters. They are considered biodiversity hotspots because they support the highest diversity of aquatic species, earning them the nickname 'rainforests of the sea.'
  • What is the marine benthic zone, and how does it support unique ecosystems such as those near hydrothermal vents?
    The marine benthic zone is the ocean floor, which is nutrient-rich due to decomposing biomass sinking from above. It supports unique ecosystems, including those near hydrothermal vents, where specialized organisms use chemical energy from vent emissions for primary production in the absence of sunlight.
  • What is the intertidal zone and how often does it experience exposure to air and submersion by ocean water?
    The intertidal zone is the coastal area between high and low tides, and it experiences exposure to air and submersion by ocean water about twice a day as tides change.
  • What adaptations help organisms survive in the intertidal zone's fluctuating conditions?
    Organisms in the intertidal zone have adaptations such as tolerance to desiccation, the ability to cling to surfaces to resist wave action, and mechanisms to cope with varying oxygen and nutrient levels.
  • Why does nutrient concentration increase with depth in the marine pelagic zone?
    Nutrient concentration increases with depth because dead and decaying biomass from surface waters sinks to the ocean floor, bringing nutrients with it.
  • How do sunlight, oxygen, and biomass levels change with increasing depth in the marine pelagic zone?
    Sunlight, oxygen, and biomass all decrease with increasing depth in the marine pelagic zone due to reduced light penetration and less photosynthetic activity.
  • What are coral reefs and why are they called the 'rainforests of the sea'?
    Coral reefs are structures formed by the calcium carbonate exoskeletons of coral polyps, and they are called the 'rainforests of the sea' because they support the highest diversity of aquatic species.
  • What is the marine benthic zone and how do hydrothermal vents support unique ecosystems there?
    The marine benthic zone is the ocean floor, which is nutrient-rich due to decomposing biomass, and hydrothermal vents there support unique ecosystems by providing chemical energy for specialized organisms in the absence of sunlight.
  • What is the intertidal zone ecosystem in marine aquatic biomes?
    The intertidal zone ecosystem is the coastal area between high and low tides, where organisms are adapted to periodic exposure to air and submersion by ocean water, experiencing fluctuating conditions twice daily.
  • What is an estuary ecosystem in the context of marine aquatic biomes?
    An estuary ecosystem is a coastal area where freshwater from rivers mixes with saltwater from the ocean, creating a unique and productive environment with varying salinity and supporting diverse organisms.
  • What is the neritic zone ecosystem in marine aquatic biomes?
    The neritic zone ecosystem refers to the shallow part of the ocean above the continental shelf, extending from the low tide mark to the edge of the continental shelf, and is characterized by abundant sunlight and high productivity.
  • What is a biotic factor in a marine ecosystem?
    A biotic factor in a marine ecosystem is any living component, such as fish, coral, algae, or other marine organisms.
  • Which marine ecosystem covers about three-quarters of Earth's surface?
    The marine pelagic zone, also known as the open ocean, covers about three-quarters of Earth's surface.