Coastal lain estuaries are formed by the sea level rising and filling an existing river valley. Coastal plain estuaries form from rising sea level, which fills an already existing river valley with water, creating an estuary. salinity, substrate, turbidity, and temperature. A flock of birds in the water at the Elkhorn Slough Reserve in California. Fjords and rias. what factors affect life in an estuary. NOAA's Estuary Education was developed to advance estuarine and coastal literacy by serving middle and high school educators through curriculum and professional development. Estuaries are sheltered bodies of water where rivers meet the sea, nutrient-rich freshwater mixes with saltwater, and sunlight penetrates the shallow depths. Examples of this are the Okura estuary, North Auckland. Coastal landforms - Coastal landforms - Barrier island/estuarine systems: Many depositional coasts display a complex of environments and landforms that typically occur together. Such embayments are called estuaries, and they receive much sediment due to runoff from an adjacent coastal plain. Estuaries- 6.09H Coastal Plain Estuaries This is also called "drowned river valleys" and are exactly what they sound like, the ocean level rises and flows over into a river valley and forms a coastal plain estuary. Tectonic estuaries for on faults, where tectonic activity has created a space that can be filled in with water. (a) bar-built estuary (b) coastal plain estuary (c) fjord (d) salt wedge estuary (e) tectonic estuary Estuary Formation Most estuaries can be grouped into four geomorphic categories based on the physical processes responsible for their formation: (1) rising sea level; (2) movement of sand and sandbars; (3) glacial processes; and (4) tectonic processes. The major estuaries of Georgia generally connect with the Atlantic Ocean through large bodies of water called sounds, which lie between coastal barrier islands and separate them. Estuary, partly enclosed coastal body of water in which river water is mixed with seawater. The term estuary is derived from the Latin words aestus (“the tide”) and aestuo (“boil”), Fjords and rias are U-shaped valleys formed by glacial action. The San Francisco Bay is an example of a tectonic estuary. Coastal plain estuaries were formed by the flooding of river valleys following a rise in sea level over geological time. Differences from other estuaries: -Common throughout the world Estuaries are one of the most productive ecosystems in the world, so there is a great diversity of animals and plants that live there. what kind of term is "community" an ecological term. They show little sedimentation, so that the ancient river valley still determines the estuarine topography. In another instance, an estuary may also reside in the channels of relict deltas. Some coastal-plain estuaries, for example, have essentially filled their former valleys without yet creating either a submerged or a protruding delta. resource partitoning. Coastal plain estuaries. drowned river valley, coastal plain estuary, bar built estuary, tectonic estuary, and fjords. Irregular coasts have numerous embayments, many of which are fed by streams. From north to south on Georgia's coast, they include Wassaw Sound, Ossabaw Sound, St. Catherines Sound, Sapelo Sound, Doboy Sound, Altamaha Sound, St. Simons Sound, St. Andrews Sound, and Cumberland Sound. In a general sense, the estuarine environment is defined by salinity boundaries rather than by geographic boundaries. Many coastal habitats are found in and around estuaries, including salt marshes, sandy beaches, mud and sand flats, rocky shores, oyster reefs, mangrove forests, tidal pools and seagrass beds. 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