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It is the site of an unusually intense collection of human-created marine debris, known as the Great Pacific Garbage Patch. The North Pacific Subtropical Gyre and the much smaller North Pacific Subpolar Gyre make up the two major gyre systems in the mid-latitudes of the Northern Pacific Ocean.
The low biomass results in clear water, allowing photosynthesis to occur to a substantial depth. The NPSG is classically described as a two-layered system. The upper, nutrient-limited layer accounts for most of the primary production, supported primarily by recycled nutrients. The lower layer has nutrients more readily available, but ...
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 ...
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".
The NPSG's salinity stratification creates a two-layer ocean in which the upper layer (0–80 m) of the water column is nutrient limited and primary production is supported by nitrogen fixation and recycled nutrients, while the lower layer's production is light limited. [45]
Archaeologists claim this pyramid is 27,000 years is old. But some scientists argue the structure can't be that ancient—and that humans couldn't have built it. ... Food. Games. Health.
These reference values include water from drinking water, other beverages, and from food. About 80% of our daily water requirement comes from the beverages we drink, with the remaining 20% coming from food. [54] Water content varies depending on the type of food consumed, with fruit and vegetables containing more than cereals, for example. [55]
The oldest known complex societies with settlements, which would be required to build pyramid-type structures, is 9,000 years old and located in modern-day Turkey.