Marine Habitat is a body of salty water.
5 characteristics of marine habitat are:
1.pressure increase with depth
2.oxygen concentration decreases with depth
3.the water is alkaline with oH of 8.0-9.0 near the surface
4.there is action of waves
5.there is tide action alternative rise and fall in the level of sea water twice a day
Mention 2 major zones of marine habitat
What are the characteristic features of each zone.
C.sub tidal zone
Basal or Alphotic zone
Pelagic or abysmal zone
What is Contential Shelf?
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The continental shelf refers to the shallow, submerged extension of a continent that extends from the shoreline to the point where there is a significant drop in the seabed depth, usually marked by a steep slope known as the continental slope. It is a part of the continental margin, which includes the continental shelf, continental slope, and the continental rise.
The continental shelf varies in width, ranging from a few kilometers to hundreds of kilometers, and its average depth is around 200 meters, although it can be shallower or deeper depending on the location. It is primarily composed of continental crust, which is an extension of the continent’s landmass.
The continental shelf plays a crucial role in various aspects:
- Economic Importance: The shallow waters of the continental shelf are rich in natural resources such as oil, gas, minerals, and fisheries. Many countries exploit these resources for economic purposes through activities like offshore drilling, mining, and fishing.
- Marine Ecosystems: The continental shelf supports diverse and productive marine ecosystems. The shallow waters receive ample sunlight, allowing for photosynthesis and supporting abundant plant and animal life. It serves as a nursery and feeding ground for various marine species.
- Coastal Protection: The width and gentle slope of the continental shelf help to dissipate the energy of incoming ocean waves, reducing the intensity of coastal erosion and providing a natural buffer against storms and coastal flooding. It also influences the formation of beaches and coastal landforms.
- Navigation and Transportation: The shallow waters of the continental shelf provide suitable conditions for navigation and the construction of ports and harbors. It allows ships to anchor close to the coastline and facilitates maritime transportation.
It is important to note that the extent and boundaries of the continental shelf are determined by international law, specifically the United Nations Convention on the Law of the Sea (UNCLOS). UNCLOS establishes guidelines for coastal states to determine the outer limits of their continental shelf and exercise sovereign rights over its resources.
Overall, the continental shelf is a significant geographical feature that has economic, ecological, and geological importance, contributing to the overall well-being of coastal regions and marine ecosystems.