Why do marine scientists examine age structure?

Why do marine scientists examine age structure?

It provides insight into the future of the species. It is important for determining where in a region a species lives. It is very difficult to tell the age of sea creatures.

In what part of the ocean do most marine organisms live?


What percentage of sea life lives in the twilight zone?

According to the study, the Twilight Zone contains up to 90 percent of the world’s total fish biomass. There are so many creatures here that if estimates hold, it would be equivalent to 1.3 tons of fish biomass per person on earth, and that excludes squid and krill.

What is the Epipelagic zone?

The epipelagic zone (or upper open ocean) is the part of the ocean where there is enough sunlight for algae to utilize photosynthesis (the process by which organisms use sunlight to convert carbon dioxide into food). Generally speaking, this zone reaches from the sea surface down to approximately 200 m (650 feet).

Which ocean zone is the deepest?

hadalpelagic zone

Which ocean zone contains hydrothermal vents?

Hydrothermal vents in the deep ocean typically form along the mid-ocean ridges, such as the East Pacific Rise and the Mid-Atlantic Ridge. These are locations where two tectonic plates are diverging and new crust is being formed.

What 2 basic zones is the ocean divided into?

The open ocean makes up about 65 percent of ocean water. It is the water away from the coastal waters and contains a wide variety of life. The ocean can be divided into two basic areas: the benthic zone or ocean floor and the pelagic zone or ocean waters.

What part of the ocean has the highest oxygen levels?

Extensive measurements have shown that the highest oxygen concentrations are found at high latitudes, where the ocean is cold, especially well-mixed and ventilated.

Is there oxygen in the abyssal zone?

The abyssal zone has temperatures around 2 to 3 °C (36 to 37 °F) through the large majority of its mass. Due to there being no light, there are no plants producing oxygen, which primarily comes from ice that had melted long ago from the polar regions.

What fish live in the abyssal zone?

The species that live the abyssal zone include the black swallower, tripod fish, deep sea anglerfish, and the giant squid. These animals are able to withstand the pressures of the ocean depths which can be up to 76 megapascals or 11,000 psi.

How much oxygen is at the bottom of the ocean?

The volcano’s summit protrudes into an oxygen-minimum zone, where oxygen concentrations range from near zero to 0.5 milliliter of oxygen per liter of seawater (darker blues). At the volcano’s base, the oxygen concentration is much higher, at 3 milliliters per liter.

Where on earth has the most oxygen?


Does deep water have more oxygen?

Deep ocean waters hold far less oxygen than surface waters because they haven’t been in contact with air for centuries. Oxygen can get into the sea as wind and waves stir the surface or through photosynthesis, which takes place in surface regions where light penetrates. Warm water is lighter

Where do we typically observe the lowest oxygen concentrations in the ocean?

The oxygen minimum zone (OMZ), sometimes referred to as the shadow zone, is the zone in which oxygen saturation in seawater in the ocean is at its lowest. This zone occurs at depths of about 200 to 1,500 m (660–4,920 ft), depending on local circumstances.