Q.53 Which of the following is/are part of marine ecosystem?
(A) Open ocean
(B) Chaparral
(C) Deep sea
(D) Estuaries
Open ocean, deep sea, and estuaries form key parts of the marine ecosystem, while chaparral does not.
Option Analysis
Open Ocean (A): This pelagic zone covers vast areas of the sea surface and water column, supporting phytoplankton, fish, and marine mammals through sunlight-driven photosynthesis in the photic zone.
Chaparral (B): Chaparral represents a terrestrial shrubland biome in Mediterranean climates, like coastal California, with drought-adapted plants and no saltwater influence, making it unrelated to marine systems.
Deep Sea (C): The deep sea, including bathypelagic and abyssal zones, hosts unique communities reliant on chemosynthesis around vents or organic detritus from above, beyond sunlight penetration.
Estuaries (D): These brackish transition zones where rivers meet oceans support high biodiversity and productivity via nutrient mixing, serving as nurseries for fish and shellfish.
Correct Answer
Options (A), (C), and (D) are parts of the marine ecosystem.
Marine ecosystem components cover over 70% of Earth’s surface, including open ocean, deep sea, and estuaries, vital for global biodiversity and oxygen production. These saltwater-based systems differ from terrestrial biomes like chaparral.
Key Marine Components
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Open Ocean: Vast pelagic waters where phytoplankton form the food web base, supporting nekton like tuna and whales.
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Deep Sea: Extreme-pressure zones with chemosynthetic bacteria at vents, hosting tube worms and unique fish.
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Estuaries: Nutrient-rich brackish areas mixing freshwater and seawater, boosting productivity for crabs, birds, and juvenile fish.
Non-Marine Exclusion
Chaparral, a dry shrubland with evergreen oaks and manzanita, thrives on land without oceanic influence, highlighting ecosystem biome distinctions.
