1 / 7

A threatened area

A threatened area. CORAL REEFS. The Great Barrier R eef :. We will watch all three presentations. You will vote. Assessment : SKILLS: Individual grade for your section – slide content and presentation skills KNOWLEDGE: Individual grade for what you remember afterwards – worksheet.

yoland
Télécharger la présentation

A threatened area

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A threatened area CORAL REEFS

  2. The Great Barrier Reef: We will watch all three presentations. You will vote. Assessment: SKILLS: Individual grade for your section – slide content and presentation skills KNOWLEDGE: Individual grade for what you remember afterwards – worksheet. UNDERSTANDING AND APPLICATION: Exam question

  3. Where the Great Barrier Reef is Facts that let us know it is a biodiversity hotspot (1 person) How coral forms, How the GBR functions as an ecosystem – trophic levels, food web, energy, inputs, outputs, (all the key words up till now) (2 people) Human threats – tourism, farming, fishing, global warming (2 people) Natural threats – Predators – crown of thorns starfish, storms/cyclones/El Nino (1 person) Whoever finishes first: Conclusion – All of these threats combined – equilibrium – consequences for economy/coastal defence/biodiversity.

  4. Where the Great Barrier Reef isFacts that let us know it is a biodiversity hotspot • Length/area • No of species • Types of species • (Hard coral species, proportion soft coral out of world’s population) • No. of world’s threatened turtles, species of marine mammals

  5. Human threats – tourism, farming, fishing, global warming • Tourism • Over fishing • Sea floor trawling • Commercial/subsistence farming • Sedimentation • Mangroves • Sea pollution – causes • Coral bleaching

  6. Natural threats – Predators – crown of thorns starfish, storms/cyclones/El Nino • Diseases • Predators • Crown of thorns starfish • Storms • Cyclones • El Nino

  7. Conclusion • Can withstand one threat • Combined threats a problem • Irreversible damage • Breakdown of the reef system • Critical threshold reached – even if threats stop, damage cannot be reversed and ecosystem won’t recover • Loss of biodiversity • New equilibrium established – not a hotspot anymore

More Related