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Water is the medium of the oceans, the medium which carries all the substances and elements involved in the marine biogeochemical cycles. Water as found in nature almost always includes dissolved substances, so water has been described as the "universal solvent" for its ability to dissolve so many substances.
The pelagic food web, showing the central involvement of marine microorganisms in how the ocean imports nutrients from and then exports them back to the atmosphere and ocean floor. A marine food web is a food web of marine life. At the base of the ocean food web are single-celled algae and other plant-like organisms known as phytoplankton.
A food pyramid and a corresponding food web, demonstrating some of the simpler patterns in a food web. A graphic representation of energy transfer between trophic layers in an ecosystem. Energy flow is the flow of energy through living things within an ecosystem . [ 1 ]
Pyramids of energy are normally upright, but other pyramids can be inverted (pyramid of biomass for marine region) or take other shapes (spindle shaped pyramid). Ecological pyramids begin with producers on the bottom (such as plants) and proceed through the various trophic levels (such as herbivores that eat plants, then carnivores that eat ...
El Niño occurs when westerly trade winds along the equator, which push warm Pacific Ocean water toward Asia and Australia, weaken and warm water is pushed back toward equatorial South America.
It is the largest ecosystem on Earth, located between the equator and 50° N latitude, and comprising 20 million square kilometers. [1] The gyre has a clockwise circular pattern and is formed by four prevailing ocean currents : the North Pacific Current to the north, the California Current to the east, the North Equatorial Current to the south ...
A food pyramid is a representation of the optimal number of servings to be eaten each day from each of the basic food groups. [2] The first pyramid was published in Sweden in 1974. [ 3 ] [ 4 ] [ 5 ] The 1992 pyramid introduced by the United States Department of Agriculture (USDA) was called the "Food Guide Pyramid" or "Eating Right Pyramid".
More than 30 pyramids in Egypt, including in Giza, may have been built along a branch of the Nile that has long since disappeared, a new study suggests. New research could solve the mystery behind ...