Characteristics of an estuary ecosystem

Estuary Characteristics. Salinity: An estuary is a place where sea water is measurably diluted by fresh water from land drainage. The mixture of fresh and salt water provides a variety of habitats for animals and plants in the area.

The most important variable characteristics of estuary water are the concentration of dissolved oxygen, salinity and sediment load. There is extreme spatial variability in salinity, with a range of near-zero at the tidal limit of tributary rivers to 3.4% at the estuary mouth.

Estuaries Are Critical Natural Habitats

And many marine organisms, including most commercially-important species of fish, depend on estuaries at some point during their development. Because they are biologically productive, estuaries provide ideal areas for migratory birds to rest and refuel during their long journeys.

Estuaries are very important to the lives of many animal species. They are often called the “nurseries of the sea” because numerous animal species rely on estuaries for nesting and breeding. Besides being a source for food, humans also rely on estuaries for recreation, jobs, and even our homes.

Estuaries have an important commercial value. Their resources provide tourism, fisheries and recreational activities to have a greater economic benefit. The protected coastal waters of estuaries also support public infrastructure such as harbors and ports which are a vital part of shipping and transportation.

Environmental Benefits

Birds, fish, amphibians, insects and other wildlife depend on estuaries to live, feed, nest, and reproduce. They are stopovers for migratory birds and nurseries and spawning grounds for fish and shellfish.

Environmental value

Estuaries are unique and important natural environments. Estuaries support a diversity of species of fish, shellfish, aquatic plants and animals. The protected waters provide vital nesting, breeding and feeding habitats for many species.

The intertidal or littoral zone maintains a balance between the land and the sea. It provides a home to specially adapted marine plants and animals. Those organisms, in turn, serve as food for many other animals. The intertidal zone also staves off erosion caused by storms.

maintain the health of coastal fisheries and waters. are a buffer between land and sea – protecting the land from storms and floods and protecting the sea from sediments and pollutants from the land. have commercial value to fishing industries. are ideal places for boats and ships to come in to land.

Answer:Sea level rise, erosion, strengthening storms, ocean acidification and rising temperatures are just some of the threats facing coastal and intertidal zones.

Answer: Industries like fishing and oyster farming can impact the water quality and also the movement of water in estuaries. Over-fishing and habitat loss reduces the amount of fish in the ocean and disrupts the food chain. – Boating can damage seagrass, reducing or degrading habitat and disrupting the food chain.

An estuary is a partially enclosed body of water, and its surrounding coastal habitats, where salt water from the ocean typically mixes with fresh water from rivers or streams. They are classified by the geology that defines them or the way in which water circulates throughout them.

A.

In an estuarine ecosystem these factors are light, oxygen, water, nutrients, temperature, salinity, and space.

This can result in the loss of aquatic plants such as seagrass, which can no longer photosynthesise to make their food. Loss of light and water clarity also affects visual predators, such as birds and some fish (such as snapper) who can’t find their prey.