What is the difference between estuary and a fjord

The mix of seawater and freshwater results in brackish water, which is somewhat salty but not salty as seawater. Both seawater and freshwater constantly circulate in and out of estuaries. While tides generate the largest flow of saltwater, river mouths result in the largest flow of freshwater. Moreover, estuaries are typically protected from the full force of waves and winds by landforms like barrier islands and peninsulas. There are many types of habitats in and around estuaries, including marshes, sandy beaches, rocky shores, river deltas, shallow open water, and tidal pools.

Estuaries are also home to unique plant and animal species that thrive in brackish waters. Coastal plain estuaries form when sea levels rise and fill in an existing river valley.

The famous Chesapeake Bay in the United States is an example of a coastal plain estuary. Such estuaries form due to tectonic activity, i. Moreover, when a barrier island separates an estuary from the sea, we call it a bar-built estuary. Fjord estuaries are a form of estuaries glaciers create. Destroying the estuary also creates the conditions for flooding.

Estuaries provide a natural barrier to ocean waves, which can erode the shoreline and destroy coastal homes and businesses. Jakarta is particularly at risk for tsunami damage, as the area experiences frequent earthquakes. Pollution Pollution accumulate s in estuaries. The Hudson-Raritan Estuary, where the Hudson and Raritan rivers meet the Atlantic Ocean, is one of the most-trafficked and most-polluted estuaries in the world.

Debris in the estuary, including fuel, garbage, sewage, and ballast , remained unregulated for decades. Runoff from agriculture and industry in New York and New Jersey also contributed a toxic estuarine environment. Industrial waste and pesticide s travel downstream and settle in the water and sediment of the estuary. Today, strict regulations and community activities are working to protect and restore the Hudson-Raritan Estuary. The restoration of oyster beds is an important part of many projects.

Oysters are a keystone species in the estuary, filter feeder s that naturally help regulate toxins in the water. Millions of oyster beds greeted Henry Hudson when he entered the river in By the middle of the 20th century, however, the few remaining oysters were too toxic for human consumption. Today, several environmental groups are establishing oyster beds to repopulate the region's native species and reduce pollution in the estuary.

Overfishing Many estuaries have been overfish ed. Pacific bluefin tuna are not endangered, but their range has been drastically reduced. Japan provides one of the largest markets for bluefin tuna, and the fish used to swim in the estuary of Tokyo Bay. Bluefin tuna are large, predatory fish. They require an expansive habitat and many kilograms of food every day. As Tokyo's population grew and technology made it easier to catch more fish with less time and money, Tokyo Bay's bluefin tuna population shrank.

Today, there is not a bluefin tuna population in Tokyo Bay. However, Japanese scientists have established a successful tuna fish farming technique. Farm-raised tuna does not have a direct environmental impact on the Tokyo Bay estuary. Indonesian, American, and Japanese governments and environmental groups struggle to promote sustainable development in estuaries.

Sustainable development aims to preserve the environment while satisfying people's economic standard of living. Edo Tokyo, the most populous city in the world, was originally known as Edo, which means "estuary. Largest Estuary in the World Because the definition of "estuary" is fluid, determining which one is the world's largest is an ongoing debate. However, many scientists say that that St.

Lawrence River, which connects the Great Lakes to the Atlantic Ocean, is the world's largest estuary. The St.

Lawrence River is about 1, kilometers miles long. Between Land Some Native Americans called estuaries the "Between-Land" because they are not quite land and not quite water. Also called an alpha predator or top predator. Hurricanes are the same thing as typhoons, but usually located in the Atlantic Ocean region.

The last ice age peaked about 20, years ago. Also called glacial age. Usually rivers enter another body of water at their mouths. Pesticides can be fungicides which kill harmful fungi , insecticides which kill harmful insects , herbicides which kill harmful plants , or rodenticides which kill harmful rodents. Also called an autotroph. Also called a storm tide. The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit.

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