Geography (9-1) - 0976 CIE

Characteristics Of The Antarctic Ecosystem

Gbogbo ọrọ náà

Antarctica is the coldest, windiest and driest continent on Earth, a place with no permanent human residents and a temperature that once fell to nearly minus ninety degrees. Yet beneath the frozen surface and in the icy Southern Ocean teems one of the planet's most remarkable food webs, built on tiny shrimp-like krill that feed penguins, seals and the largest animals that have ever lived.

This lesson explains where the Antarctic ecosystem lies, why its climate is so extreme, and how its plants and animals are adapted to survive. You will learn to link the abiotic factors of cold, ice, light and pressure to the living organisms that depend on them, exactly the kind of connected thinking examiners reward.

Ebumnobi

  1. The location of the Antarctic ecosystem.
  2. The characteristics of the Antarctic climate: high pressure, the influence of latitude, angle of the sun, temperature, precipitation.
  3. The features of the Antarctic ecosystem.
  4. The interrelationships between abiotic and biotic factors in the Antarctic ecosystem and how flora and fauna adapt to survive.

Nkuzi Olu

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Maapụ uche

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Akwụkwọ Ọmụmụ

An ecosystem is a community of living things (the biotic part) together with the non-living surroundings they depend on (the abiotic part), all interacting as one system. Antarctica is a striking case study because its abiotic conditions are so extreme that only highly specialised life can survive there. If you can explain how the cold, the ice and the long polar night shape life in Antarctica, you have understood the central idea of the whole 'Changing ecosystems' theme.

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Nnyocha Ọmụmụ

Ekele diri gi maka imecha ihe karịrị na Characteristics Of The Antarctic Ecosystem. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

  1. Antarctica is best described as a: A. tropical grassland B. polar desert C. temperate forest D. hot desert Answer: B
  2. Which organism is the keystone of the Antarctic marine food web? A. orca B. leopard seal C. krill D. polar bear Answer: C
  3. The Antarctic climate has high pressure mainly because: A. warm air rises B. cold dense air sinks C. there is heavy rainfall D. the Sun is overhead Answer: B
  4. Which is an abiotic factor in the Antarctic ecosystem? A. krill B. phytoplankton C. sea ice D. penguins Answer: C
  5. A thick layer of blubber helps Antarctic seals mainly by: A. helping them swim faster B. providing camouflage C. insulating against the cold D. storing oxygen Answer: C

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