“Starfish” imepotea wapi? Takatoshi AKAI     JOCV/231       KWSMalindi Marine Park
Sometimes, star fish                                out break in the                                ocean.                ...
Seaweed       Mytilidae / Shell        Cellana mazatlandica                                          / ShellPollicipes mit...
3 months later…                     Mytilidae / ShellPollicipes mitella/ Shell
Barnacle!! Get out of here!!                     Pollicipes mitella                     / Shell                           ...
Mytilidae / ShellPollicipes mitella/ Shell
• Seaweed disappeared due to loss of  foothold, such as  Barnacle / Shell  Pollicipes mitella / Shell                     ...
Once seaweed reduced, its predator, such as Mytilidae, and Cellana mazatlandica disappeared, due to no food to eat.       ...
• Once some creatures disappeared,  other species are also start to disappear.  Even they are not related by food chain.
Conclusion• Among the eco-system, each creatures  connected each other complicated.• So, even take out only 1 species out ...
“Starfish” imepotea wapi
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“Starfish” imepotea wapi

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I am working in KWS as a environmental teacher. This presentation is about eco system. To understand all species are related, and even if 1 species dismiss, it will destroy all eco system.

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  • ヒトデを排除すると生態系はどう変わるのか 環境が変化することにより海岸で生活する生物の生態系も変化してしまう。 ときどき、ヒトデが大発生して貝を食い荒らし、漁業に大きな被害を与えます。 漁師にとってヒトデは何の役にもたたないばかりか、切り刻んで海に捨てても 腕の一本一本からヒトデが再生してしまうほど生命力の強い厄介者です。 そのヒトデを生態系から全部排除したらどうなるでしょうか?
  • 海藻、カメノテ、ムラサキイガイ、フジツボ、カサガイ、ヒトデ
  • ①ヒトデを除く 海藻、カメノテ、ムラサキイガイ、フジツボ、ヒザラガイ、カサガイ、ヒトデ の中からヒトデだけを除く
  • 数ヶ月後 ②カメノテとムラサキイガイが増えた
  • ③フジツボがその海域から追い出される
  • そのうち繁殖力の強いムラサキイガイが勢力を増しカメノテがほとんどいなくなる
  • 海藻は足場となるフジツボやカメノテがいなくなったため岩に付着できず消滅
  • 海藻を餌にしていたヒザラガイやカサガイがムラサキイガイに住み場所を奪われ餌の海藻不足から消滅
  • カイメンやイソギンチャクなどムラサキイガイとは直接、食物連鎖でつながっていない種類の動物達も次々といなくなる
  • 生態系では生物同士のつながりは複雑なのでヒトデを取り除いただけで生態系のバランスがくずれ、良きしない事態を招いてしまうこともある。
  • “Starfish” imepotea wapi

    1. 1. “Starfish” imepotea wapi? Takatoshi AKAI JOCV/231 KWSMalindi Marine Park
    2. 2. Sometimes, star fish out break in the ocean. They hit hardly to fishery.They are very strong. Even if you cut down star fish and throw away to sea.It will survive and recreate themselves from 1 peace.
    3. 3. Seaweed Mytilidae / Shell Cellana mazatlandica / ShellPollicipes mitella/ Shell Barnacle / Shell Starfish
    4. 4. 3 months later… Mytilidae / ShellPollicipes mitella/ Shell
    5. 5. Barnacle!! Get out of here!! Pollicipes mitella / Shell Mytilidae / Shell Barnacle!! Get out of here!!Barnacle / Shell
    6. 6. Mytilidae / ShellPollicipes mitella/ Shell
    7. 7. • Seaweed disappeared due to loss of foothold, such as Barnacle / Shell Pollicipes mitella / Shell Pollicipes mitella / Shell Seaweed
    8. 8. Once seaweed reduced, its predator, such as Mytilidae, and Cellana mazatlandica disappeared, due to no food to eat. SeaweedMytilidae / Shell Cellana mazatlandica / Shell
    9. 9. • Once some creatures disappeared, other species are also start to disappear. Even they are not related by food chain.
    10. 10. Conclusion• Among the eco-system, each creatures connected each other complicated.• So, even take out only 1 species out of its eco-system, it will lead to destroy whole eco-system.

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