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Published on 21 February 2022

Estuaries presentation for SST OMAR

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Transcript
00:04
Estuaries
00:07
By omar mahmoud
00:13
What are Estuaries?
00:16
An estuary is a semi-enclosed coastal water feature where freshwater from rivers and streams interacts with seawater. Estuaries also sustain distinct ecosystems of plants and animals that have evolved specifically for living at the sea's edge.
00:27
Rising sea levels resulted in the formation of estuaries. As the sea level rose, it submerged river valleys and filled glacial troughs, resulting in the formation of estuaries.
00:31
How are Estuaries formed?
00:38
PROS .Because many animal species rely on estuaries for feeding and mating, they are often referred to as the "nurseries of the sea." .22 of the world's 32 major cities are situated on estuaries. . Before rivers and streams flow into the ocean, estuaries filter away sediments and contaminants. CONS Coastal development, the introduction of invasive species, overfishing, dams, and global climate change have all contributed to the decline of estuaries' health, making them one of the world's most endangered ecosystems.
00:46
Life in Estuaries
00:48
The water content in nearly all estuaries changes regularly throughout the tidal cycle. Plants and animals living in estuaries must be able to respond quickly to extreme changes in salinity in order to survive in these environments.  Plants and animals are those that can only tolerate tiny variations in saltwater.
00:52
THANK YOU
00:54
Type here
00:54
Now leave me enjoy the beach
00:54