Quick Answer: Discuss Why The Ocean Is Called A “biological Desert”?

Located on 5 Gyres of major oceans NOTE : Gyre – These are earth’s system of rotating ocean currents..Centre of this gyre is further away from any continent and productive ocean…This is why this region is called as oceanic desert.

Why is the ocean called a biological desert?

Regions of ocean that contain low phytoplankton biomass indexed as chlorophyll-concentrations are called “ocean biological deserts”. The concept of ocean fertilisation is based on the effectiveness of the biological pump to sequester large amount of atmospheric carbon into deep layers of the oceans.

Which sea is known as biological desert?

The sea remains still with seaweeds floating on the surface, the Sargasso Sea is an example of an ecosystem. Biologists often refer to it as a biological desert, because it’s largely devoid of plankton,which serve as the basic food supply for small organisms and fishes.

What are the causes of biological desert?

Declines in productivity may be the result of climate change, deforestation, overgrazing, poverty, political instability, unsustainable irrigation practices, or combinations of these factors.

Which area of marine ecosystem are called biological desert?

The Sahara, the Gobi, the Chihuahuan–all are great deserts. But what about the South Pacific’s subtropical gyre? This “biological desert” within a swirling expanse of nutrient-starved saltwater is the largest, and least productive, ecosystem of the South Pacific.

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What is a biological desert?

These are regions in ocean that contain low phytoplankton biomass or chlorophyl concentration. They are like oceanic desert characterised by nutriant starved saltwater and having least productive ecosystem.

Which one of the following is a biological desert?

The correct answer is Damodar. It is a river flowing across the Indian states of Jharkhand and West Bengal. It rises in the Palamau hills of Chota Nagpur at an elevation of about 609.75 m. It is known as a biological desert on account of its pollutants.

Which river is sorrow of Bengal?

Damodar River was earlier known as the “River of Sorrows”as it used to flood many areas of Bardhaman, Hooghly, Howrah and Medinipur districts. Even now the floods sometimes affect the lower Damodar Valley, but the havoc it wreaked in earlier years is now a matter of history.

What is an ocean desert?

So-called “ocean deserts” or “dead zones” are oxygen-starved (or “hypoxic”) areas of the ocean. They can occur naturally, or be caused by an excess of nitrogen from agricultural fertilizers, sewage effluent and/or emissions from factories, trucks and automobiles.

Is open ocean a desert?

The ocean is different there. Despite taking up 10 percent of the ocean’s surface, the South Pacific Gyre (SPG) – the largest of Earth’s five giant ocean-spanning current systems – is generally considered a ‘desert’ in terms of marine biology.

Why are subtropical gyres called ocean deserts?

The position of gyres away from land means that the amount of dust deposited in surface waters is insignificant, and the rotation of water within the gyre tends to prevent water being mixed in from adjacent waters. Compared to the coast, where marine life abounds, the subtropical gyres are oceanic deserts then.

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Where is the ocean desert?

Deep in the South Pacific ocean there is a region almost four times bigger than the U.S. where virtually no complex life exists. This “ocean desert” is one of the most remote and least studied parts of Earth—yet the microbial communities that do exist there play a huge role in chemical cycles around the globe.

What does marine water mean?

Marine ecosystems are the largest of Earth’s aquatic ecosystems and are distinguished by waters that have a high salt content. They also extend outwards from the coast to include offshore systems, such as the surface ocean, pelagic ocean waters, the deep sea, oceanic hydrothermal vents, and the sea floor.

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