Sci-Five | The Hindu Science Quiz: On Marine Ecosystems
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What is the title of the zone within the ocean the place daylight can’t penetrate and photosynthesis can’t happen?
- Abyssal zone
- Twilight zone
- Mesopelagic zone
- Aphotic zone
The aphotic zone is the portion of a lake or ocean the place there’s little or no daylight. It is formally outlined because the depths past which lower than 1% of daylight penetrates.
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Which marine ecosystem is characterised by underwater mountains and volcanoes the place a various vary of species might be discovered as a result of nutrient-rich upwelling?
- Coral reefs
- Hydrothermal vents
- Kelp forests
- Mangrove swamps
Hydrothermal vents are fissures on the seabed from which geothermally heated water discharges. They are generally discovered close to volcanically energetic locations, areas the place tectonic plates are transferring aside at mid-ocean ridges, ocean basins, and hotspots.
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Which of the next gases is mostly dissolved in seawater, contributing to its salinity?
- Oxygen
- Nitrogen
- Carbon dioxide
- Hydrogen
Increased carbon dioxide within the environment can result in elevated salinity within the ocean. As carbon dioxide ranges in ocean water enhance, this causes the formation of carbonic acid, reducing the pH of the ocean.
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Which marine biome is characterised by huge, open water with minimal vegetation and is residence to quite a lot of pelagic species?
- Open ocean
- Deep-sea flooring
- Intertidal zone
- Seagrass meadows
The oceanic zone is the huge open a part of the ocean the place animals similar to whales, sharks, and tuna reside.
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What is the time period for the world the place a river meets the ocean, creating a singular transitional ecosystem?
An estuary is an space the place a freshwater river or stream meets the ocean. When freshwater and seawater mix, the water turns into brackish. Estuaries kind a transition zone between river environments and maritime environments.
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