7.5 - Coral Reefs

71 %
29 %
Information about 7.5 - Coral Reefs
Education

Published on December 16, 2008

Author: ecumene

Source: slideshare.net

Coral Reefs

You should be able to… Describe the conditions required for the development of coral reefs Understand the global distribution of coral reefs that results from this Describe fringing and barrier reefs and atolls Appreciate that coral reefs are under threat from human activity

Describe the conditions required for the development of coral reefs

Understand the global distribution of coral reefs that results from this

Describe fringing and barrier reefs and atolls

Appreciate that coral reefs are under threat from human activity

Coral Reef Formation The polyp forms the basis of life on the coral reef. It builds reefs through the production of a calcium carbonate skeleton which it constructs as it grows. Polyp growth is the result of a symbiotic relationship between the polyp and zooxanthellae (algae) which rely on photosynthesis for their growth. The zooxanthellae provide essential nutrients to the polyp to enable growth.

The polyp forms the basis of life on the coral reef.

It builds reefs through the production of a calcium carbonate skeleton which it constructs as it grows.

Polyp growth is the result of a symbiotic relationship between the polyp and zooxanthellae (algae) which rely on photosynthesis for their growth.

The zooxanthellae provide essential nutrients to the polyp to enable growth.

Conditions required Temperature: 23-25°C; Water Depth: less than 25m but not exposed to air; Light: for photosynthesis; Salinity required; Clean, clear water, sediment free, Well oxygenated water produced by strong wave action;

Temperature: 23-25°C;

Water Depth: less than 25m but not exposed to air;

Light: for photosynthesis;

Salinity required;

Clean, clear water, sediment free,

Well oxygenated water produced by strong wave action;

Global Distribution Global distribution: Tropical seas between Tropics of Cancer and Capricorn. Offshore, on eastern and western continental and island margins. 92% of total found in Indo-Pacific region.

Type of Reef Fringing reef – reef that is directly attached to a shore or borders it with an intervening shallow channel or lagoon. Barrier reef – reef separated from a mainland or island shore by a deep lagoon ; see Great Barrier Reef . Atoll reef – a more or less circular or continuous barrier reef extending all the way around a lagoon without a central island; see atoll . From Wikipedia

Fringing reef – reef that is directly attached to a shore or borders it with an intervening shallow channel or lagoon.

Barrier reef – reef separated from a mainland or island shore by a deep lagoon ; see Great Barrier Reef .

Atoll reef – a more or less circular or continuous barrier reef extending all the way around a lagoon without a central island; see atoll .

From Wikipedia

Reef Theories Charles Darwin postulated that fringing reef, barrier reef and atoll development happened through geological time as a result of continued reef growth and volcanic subsidence. James Dwight Dana (a geologist) provided evidence top support Darwin's theory of uplift and subsidence.

Charles Darwin postulated that fringing reef, barrier reef and atoll development happened through geological time as a result of continued reef growth and volcanic subsidence.

James Dwight Dana (a geologist) provided evidence top support Darwin's theory of uplift and subsidence.

After Darwin

Dana’s Evidence

Reginald Daly (20 th Century) An island emerges from the surface of the sea. Sea levels drop significantly during an Ice Age. Horizontal terraces and ledges are cut by erosion during the period of low sea level. As the Ice Age ends the sea level rises. Coral reef growth subsequently takes place on the newly created submerged platforms.

An island emerges from the surface of the sea.

Sea levels drop significantly during an Ice Age.

Horizontal terraces and ledges are cut by erosion during the period of low sea level.

As the Ice Age ends the sea level rises.

Coral reef growth subsequently takes place on the newly created submerged platforms.

Daly in Diagrams

The 3D Theory of Coral Development The modern explanation of coral reef development should correctly be called the Darwin/Dana/Daly Theory (The 3D Theory!) of Coral Reef Formation since only the works of these three men taken together can fully explain the characteristics observed on atolls today.

Threats to Coral Reefs

The Impacts Coral Bleaching Damaged Coral

Coral Reef Management What can be done to protect the worlds coral reefs? Why is protecting coral reefs important? Case Study Great Barrier Reef (Australia) Marine Park Website

What can be done to protect the worlds coral reefs?

Why is protecting coral reefs important?

Case Study

Great Barrier Reef (Australia)

Marine Park Website

Add a comment

Related presentations

Related pages

7.5 - Coral Reefs - Education - documents

1. Coral Reefs 2. You should be able to… Describe the conditions required for the development of coral reefs Understand the global distribution of coral ...
Read more

Coral reef - Wikipedia, the free encyclopedia

Sponges are essential for the functioning of the coral reef's ecosystem. Algae and corals in coral reefs produce organic material.
Read more

The coral reefs of the Dominican Republic - Geografía Física

The coral reefs of the Dominican Republic 81 -Puma Cana and Momecristi, broad platform barrier reefs are found. Not so in Palenque,
Read more

Climate-change adaptation: Designer reefs : Nature News ...

Climate-change adaptation: Designer reefs. ... Coral reefs have been besieged in recent ... He and his team have built tanks out of 7.5-litre cooler ...
Read more

Reefs Sandals | Shoes - 7.5 | Millions of options, one ...

Reefs Sandals - 76 results like RYKA Women's Scamper Athletic Sandal - Coral Reef/Peach Nectar - 7.5 C/D US, Reef Rover Low (Women's) - Light Blue - Medium ...
Read more

The Action Plan to Conserve Coral Reef Ecosystem in Japan

The Action Plan to Conserve Coral Reef Ecosystem in Japan Stakeholders to the Action Plan The Action Plan was developed by the Working Group of
Read more

reef 7.5 | eBay

Find great deals on eBay for reef 7.5 reef 8. Shop with confidence.
Read more