How many aquatic ecosystems are there

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Ecology 99, — Wardle, D. Ecological linkages between aboveground and belowground biota. Aquatic ecosystems are generally divided into two types --the marine ecosystem and the freshwater ecosystem. The largest water ecosystem is the marine ecosystem, covering over 70 percent of the earth's surface. Oceans, estuaries, coral reefs and coastal ecosystems are the various kinds of marine ecosystems. Freshwater ecosystems cover less than 1 percent of the earth and are subdivided into lotic, lentic and wetlands.

Although the oceans are connected, each of them has unique species and features. According to Barbara A. Oceans are home to different species of life. The waters of the Arctic and Southern Oceans are very cold, yet filled with life. The largest population of krill small, shrimp-like marine creatures lies under the ice of the Southern Ocean.

Estuaries are places where rivers meet the sea and may be defined as areas where salt water is diluted with fresh water. River mouths, coastal bays, tidal marshes and water bodies behind barrier beaches are some examples of estuaries. They are biologically productive as they have a special kind of water circulation that traps plant nutrients and stimulates primary production. According to Environmental Protection Agency, coral reefs are the world's second richest ecosystems and have a wide diversity of plants and animals.

As a result, coral reefs often are referred to as the rain forest of the oceans. Land and water join to create the coastal ecosystems. These ecosystems have a distinct structure, diversity, and flow of energy. Epic floods leave South Sudanese to face disease and starvation. Travel 5 pandemic tech innovations that will change travel forever These digital innovations will make your next trip safer and more efficient. But will they invade your privacy?

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