Antarctic seas are extremely productive because phytoplankton grows abundantly during the extended daylight of summer and feeds huge populations of krill. Krill, shrimplike crustaceans, are a key animal in this ecosystem, as food for top predators: whales, penguins, and seals.
Why are Antarctic seas more productive?
Why is cold water more productive? Cold water can hold more dissolved oxygen than warm water. The levels of dissolved oxygen in Antarctic waters are so high that many fish have few or no red blood cells (the blood cells other animals, including humans, use to carry oxygen).
Which marine ecosystem is the most productive on earth?
Coral reefs are among the most productive ecosystems on the planet, with the primary producers at the base of the food chain (including corals) supporting their complex food webs.
Why is the Antarctic ocean important?
The Southern Ocean is the only ocean that encircles the globe uninhibited by land masses. The Southern Ocean connects the 3 main ocean basins (Atlantic, Pacific and Indian) and creates a global circulation system that is largely driven by the Antarctic Circumpolar Current (ACC)—the world’s largest current.
Why are cold oceans more productive?
Where phytoplankton grow depends on available sunlight, temperature, and nutrient levels. Because cold waters tend to have more nutrients than warm waters, phytoplankton tend to be more plentiful where waters ware cold.
Why is Antarctica such a special ecosystem?
The ecosystem of Antarctica has adapted to the harsh climatic conditions. These harsh conditions limit the complexity of the food web . On land, there are no trees or shrubs, and very few flowering plants. … Penguins, seen on land, rely on food in the sea for their energy and so are part of the marine ecosystem.
What is the Antarctic marine ecosystem?
The Antarctic environment is harsh and plants and animals need to have special adaptations to survive. Most of the animals that live on land in Antarctica are microscopic. The ocean surrounding Antarctica is a much richer source of food and supports a much higher level of biodiversity.
Why is the marine environment productive?
The most productive waters of the world are in regions of upwelling. Upwelling in coastal waters brings nutrients toward the surface. Phytoplankton reproduce rapidly in these conditions, and grazing zooplankton also multiply and provide abundant food supplies for nekton.
What are some very productive marine environments and why are they so productive?
The proximity to land and its nutrient sources, the interception of sinking organic matter by the shallow seafloor, and the propensity for coastal upwelling all result in highly productive ecosystems.
Which ecosystems are most productive and why?
What are the two most productive land ecosystems? The two most productive are estuaries, swamps and marshes, and tropical rain forests. The two least productive are open ocean, tundra, and desert.
Why Antarctica is known as the continent of science?
Antarctica is called the continent of science because it is inhabited primarily by research scientists.
What unique opportunities does the Antarctic environment provide to the scientists Class 12?
Answer: By visiting the Antarctica we can understand the earth’s past, present and future. A visit there can teach the next generation to understand and value our planet. Antarctica also holds within its ice-cores half-million-years old carbon records which will help us to study climatic changes by global warming.
Why is Antarctica important climate?
Why the Antarctic is so important
The huge frozen landmass at the bottom of our planet is more than just spectacular icing on the globe. It could be vital for our survival too. The Antarctic ice deflects some of the sun’s rays away from the Earth, keeping temperatures liveable.