Science for Kids: Marine or Ocean Biome
The climate and the types of plants and animals found in a marine biome depend on a lot An estuary is where a body of freshwater meets a body of salt water. This land form is formed when water has covered a lot of the earths crust. Estauries are formed when freshwater and saltwater meet. the sizes of estauries vary. The aquatic biome can be broken down into two basic regions, freshwater (i.e, In the case of the insects, such as dragonflies and midges, only the egg and larvae stages are found in The evaporation of the seawater provides rainwater for the land. The intertidal zone is where the ocean meets the land—sometimes it is.
The temperature is cooler at the source than it is at the mouth. The water is also clearer, has higher oxygen levels, and freshwater fish such as trout and heterotrophs can be found there.Freshwater Biomes
Since there is less light, there is less diversity of flora, and because of the lower oxygen levels, fish that require less oxygen, such as catfish and carp, can be found. Wetlands Wetlands are areas of standing water that support aquatic plants.
Marshes, swamps, and bogs are all considered wetlands. Plant species adapted to the very moist and humid conditions are called hydrophytes.
These include pond lilies, cattails, sedges, tamarack, and black spruce. Marsh flora also include such species as cypress and gum.
Wetlands have the highest species diversity of all ecosystems. Many species of amphibians, reptiles, birds such as ducks and wadersand furbearers can be found in the wetlands.
Visit our gallery of wetlands imageswhich illustrate the amazing diversity of wetland ecosystems.
Types of Saltwater Ecosystems | Sciencing
The evaporation of the seawater provides rainwater for the land. Like ponds and lakes, the ocean regions are separated into separate zones: All four zones have a great diversity of species. Some say that the ocean contains the richest diversity of species even though it contains fewer species than there are on land.
Because of this, the communities are constantly changing.
- Land Features Around Freshwater Biomes
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- Land Features Under the Ocean
On rocky coasts, the zone is stratified vertically. Where only the highest tides reach, there are only a few species of algae and mollusks.
In those areas usually submerged during high tide, there is a more diverse array of algae and small animals, such as herbivorous snails, crabs, sea stars, and small fishes. At the bottom of the intertidal zone, which is only exposed during the lowest tides, many invertebrates, fishes, and seaweed can be found.
The intertidal zone on sandier shores is not as stratified as in the rocky areas. The pelagic zone includes those waters further from the land, basically the open ocean. The pelagic zone is generally cold though it is hard to give a general temperature range since, just like ponds and lakes, there is thermal stratification with a constant mixing of warm and cold ocean currents.
The flora in the pelagic zone include surface seaweeds. Estuaries also provide an important habitat for birds, mammals, reptiles, amphibians and insects, and estuary vegetation helps to filter runoff and other pollutants. However, since most water drains from the land to the ocean via estuaries, potential for pollution is high.
Pollution diminishes estuary ecosystems and impacts the humans who depend on estuaries for food. Tropical coral reefs occur in shallow, warm waters, typically off the coast of a land mass or in areas where islands once existed. Corals reefs are fragile ecosystems that are sensitive to imbalances in water quality and habitat species.
Coral reef food webs begin with algae, which are the primary source of energy in the reef. Corals and other filter feeders depend on plankton—a form of algae—and detritus.
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Brackish seas and lakes[ edit ] Some seas and lakes are brackish. The Baltic Sea is a brackish sea adjoining the North Sea. Originally the confluence of two major river systems prior to the Pleistocenesince then it has been flooded by the North Sea but still receives so much freshwater from the adjacent lands that the water is brackish. Because the salt water coming in from the sea is denser than freshwater, the water in the Baltic is stratified, with salt water at the bottom and freshwater at the top.
Limited mixing occurs because of the lack of tides and storms, with the result that the fish fauna at the surface is freshwater in composition while that lower down is more marine. Cod are an example of a species only found in deep water in the Baltic, while pike are confined to the less saline surface waters. The Caspian Sea is the world's largest lake and contains brackish water with a salinity about one-third that of normal seawater.
The Caspian is famous for its peculiar animal fauna, including one of the few non-marine seals the Caspian seal and the great sturgeonsa major source of caviar. The Hudson Bay is a brackish marginal sea of the arctic oceanit remains brackish due its limited connections to the open ocean, very high levels freshwater surface runoff input from the large Hudson Bay drainage basinand low rate of evaporation due to being completely covered in ice for over half the year.