FAQ

# how deep is the photic zone

## How Deep Is The Photic Zone?

approximately two hundred meters

## At what depth does the photic zone end?

200 meters
In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 meters that photosynthesis is no longer possible.Nov 5, 2021

## How deep is the photic zone in the ocean?

photic zone, surface layer of the ocean that receives sunlight. The uppermost 80 m (260 feet) or more of the ocean, which is sufficiently illuminated to permit photosynthesis by phytoplankton and plants, is called the euphotic zone.

## How do you find the depth of the photic zone?

The depth of the disappearance of the Secchi disk multiplied by a factor of ~ 2.8 yields the depth of the 1% light level or the euphotic zone depth. For example, in blue water near Hawaii the Secchi disk will disappear at ~33 meters. Then 2.8 x 33 m = 92 meters for the depth of the euphotic zone or the 1% light level.

## Is the photic zone shallow?

Coral reefs are characterized by high biodiversity and the structures created by invertebrates that live in warm, shallow waters within the photic zone of the ocean. They are mostly found within 30 degrees north and south of the equator.

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## Does light reach the bottom of the ocean?

The ocean is very, very deep; light can only penetrate so far below the surface of the ocean. As the light energy travels through the water, the molecules in the water scatter and absorb it. … Below the photic zone, from 200 to 1,000 meters, is the aphotic (a meaning without and photic meaning light) zone.

## At what depth is there no light in the ocean?

200-1,000 meters
Light in the ocean decreases with depth, with minimal light penetrating between 200-1,000 meters (656-3,280 feet) and depths below 1,000 meters receiving no light from the surface.

## What is photic depth?

The ocean can be divided into depth layers depending on the amount of light penetration, as discussed in pelagic zone. The upper 200 metres is referred to as the photic or euphotic zone. This represents the region where enough light can penetrate to support photosynthesis, and it corresponds to the epipelagic zone.

## Where can 90% of the of the ocean’s life be found?

sunlit zone
Because photosynthesis occurs here, more than 90 percent of all marine life lives in the sunlit zone. The sunlit zones goes down about 600 feet. Many animals inhabit this zone. Most fish live in this zone.

## What color light penetrates water the deepest?

Blue light penetrates best, green light is second, yellow light is third, followed by orange light and red light. Red light is quickly filtered from water as depth increases and red light effectively never reaches the deep ocean.

## Which zone is the deepest part of the ocean?

The deepest zone of the ocean, the hadalpelagic zone extends from 19,700 feet (6,000 meters) to the very bottom at 36,070 feet (10,994 meters) in the Mariana Trench off the coast of Japan.

## What is the temperature of the photic zone?

104 to 27 degrees F.
On average, it extends to about 660 feet (200 meters); the depth of the ocean averages about 13,000 feet or 4,000 m. The temperature in this zone ranges from 104 to 27 degrees F.

## Why do phytoplankton live in the photic zone?

Planktonic aquatic organisms such as phytoplankton, are shallow water creatures; they are restricted to the photic zone in oceans because growth is totally dependent upon photosynthesis. … Because Phytoplankton are at the bottom of the food chain and Zooplankton feed on them.

## What marine zones are photic?

Photic Zone is the top layer, nearest the surface of the ocean and is also called the sunlight layer. In this zone enough light penetrates the water to allow photosynthesis. The Disphotic Zone is found just below the Photic Zone and is known as the twilight layer.

## What happens in a photic part of a body of water apex?

Photosynthesis occurs in the photic part of a water body. Explanation: The word photic means light.

## Which oceanic zone includes the photic zone?

pelagic realm
Within the pelagic realm is the photic zone, which is the portion of the ocean that light can penetrate (approximately 200 m or 650 ft).

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## Is the ocean pitch black?

Icy cold, pitch black and with crushing pressures – the deepest part of the ocean is one of the most hostile places on the planet.

## How did the ocean get so deep?

The deepest part of the ocean, the hadal zone, is anywhere deeper than six kilometres. … The extreme depth of the Mariana Trench and other oceanic trenches is caused by subduction – where on the boundary of two converging tectonic plates, one descends down into Earth’s mantle, creating a deep trough.

## How cold is the bottom of the ocean?

Therefore, the deep ocean (below about 200 meters depth) is cold, with an average temperature of only 4°C (39°F). Cold water is also more dense, and as a result heavier, than warm water.

## How deep can a human dive before being crushed?

Human bone crushes at about 11159 kg per square inch. This means we’d have to dive to about 35.5 km depth before bone crushes. This is three times as deep as the deepest point in our ocean.

## What is the depth of Mariana Trench?

Then explain to students that the Mariana Trench is the deepest part of the ocean and the deepest location on Earth. It is 11,034 meters (36,201 feet) deep, which is almost 7 miles.

## What is the darkest part of the ocean called?

Mariana Trench. Imagine the deepest, darkest place on Earth—an underwater trench plummeting to a depth of 35,800 feet, nearly seven miles below the ocean surface. The Mariana Trench is one of the least explored places on Earth.

## Does the photic zone have light?

The importance of nutrients and light in photic zone. Primary production in the photic zone is influenced by three major factors—nutrients and light, which are essential for photosynthesis, and grazing pressure, the rate at which the plants are eaten by herbivores.

## What can impact the depth of the photic zone?

The depth of the photic zone can vary from a few centimeters to several hundred meters. Sunlight is scattered and absorbed by particles and dissolved organic matter in the water column, and its intensity in water decreases with depth.

## How deep is the midnight zone in the ocean?

1,000 to 4,000 m
The bathyal zone or bathypelagic – from Greek βαθύς (bathýs), deep – (also known as midnight zone) is the part of the open ocean that extends from a depth of 1,000 to 4,000 m (3,300 to 13,100 ft) below the ocean surface. It lies between the mesopelagic above, and the abyssopelagic below.

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## How much of the ocean is discovered?

According to the National Ocean Service, it’s a shockingly small percentage. Just 5 percent of Earth’s oceans have been explored and charted – especially the ocean below the surface. The rest remains mostly undiscovered and unseen by humans.

## What is the flora of Marine?

Marine floras (ie, plants from the sea) primarily include brown, blue, green, blue-green, and red algae. The most commonly used marine floras are brown algae (kombu/kelp, wakame, and arame).

## How much of Earth is unexplored?

65 percent
The extent of human impact on these underwater ecosystems is impressive. Still, we’ve only mapped 5 percent of the world’s seafloor in any detail. Excluding dry land, that leaves about 65 percent of the Earth unexplored.

## How deep does red light go in the ocean?

Unlike blue light, red light becomes quickly filtered from water as the depth increases. At around 300 feet, no visible light can penetrate the water at all! Let’s take an apple for example.

## Which light travels the farthest?

The light of red color can penetrate to a longer distance than other lights because it is scattered the least by air molecules in the atmosphere and therefore red can actually be seen from the farthest distance!

## What colors do fish see?

The goldfish has four kinds of cones: red, green, blue and ultraviolet. Other fish have different numbers and kinds of cones meaning that they have the capability of seeing in color. However, simply finding cones in the eye does not mean that an animal has color vision.

## What are the depths of each zone?

The ocean is divided into five zones: the epipelagic zone, or upper open ocean (surface to 650 feet deep); the mesopelagic zone, or middle open ocean (650-3,300 feet deep); the bathypelagic zone, or lower open ocean (3,300-13,000 feet deep); the abyssopelagic zone, or abyss (13,000-20,000 feet deep); and the …

## How deep is the trench zone?

With depths exceeding 6,000 meters (nearly 20,000 feet), trenches make up the world’s “hadal zone,” named for Hades, the Greek god of the underworld, and account for the deepest 45 percent of the global ocean.

## What are the three major depth zones?

The three ocean zones, in order of depth, are the surface, middle realm and deep realm.

## Lab 05 photic zone depth 1

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