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Reef

reef

1. A chain or range of rocks lying at or near the surface of the water. See Coral reefs, under Coral.

2. (Science: chemical) A large vein of auriferous quartz; so called in australia. Hence, any body of rock yielding valuable ore.

(Science: zoology) Reef builder, any heron of the genus Demigretta; as, the blue reef heron (D.jugularis) of australia.

Origin: Akin to D. Rif, G. Riff, Icel. Rif, Dan. Rev; cf. Icel. Rifa rift, rent, fissure, rifa to rive, bear. Cf. Rift, Rive.


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Stromatolites

Stromatolites are pretty important organisms, seeing as they where the dominant reef builders for most of the Precambrian period. Stromatolites are made of Cyanobacteria as well as a few other prokaryotes. Their structures vary from laminar sheets to domes and ...

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by Draco
Tue Oct 28, 2008 2:41 pm
 
Forum: Ecology
Topic: Stromatolites
Replies: 0
Views: 785

Strange insect I've found

Ok so I visited my home country (Vietnam), and one day, in my house I found an insect in my room. So I took pictures of it and threw it out into my garden again. Since I forgot my wires, I can't connect my phone to my comp, so I'll give a description of it and hopefully post the picture soon. Basica...

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by Azedenkae
Wed Jun 20, 2007 2:44 pm
 
Forum: Zoology Discussion
Topic: Strange insect I've found
Replies: 5
Views: 1288

The Fiber Disease

... biosis = living). Examples are nitrogen-fixing bacteria (called rhizobia) which live in root nodules on legume roots, single-celled algae inside reef-building corals, and bacterial endosymbionts inside several insect species. Many other examples of endosymbiosis exist. It is estimated that beneficial ...

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by Skytroll
Mon Aug 21, 2006 7:46 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 712481

The Fiber Disease

... ciguatera. Alexandrium – produces the saxitoxins responsible for PSP. Large concentrations cause red tides. Gambierdiscus toxicus concentrates in reef fish that aren’t normally toxic, causes ciguatera. (symptoms include tingling around the lips, nausea, vomiting, weakness, and numbness). Oomycota ...

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by Skytroll
Fri Aug 04, 2006 3:26 pm
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 712481

What is the most poisonous snake in da world?

... must of took a direct hit to the carotid artery? Geographic and Textile are the 2 to watch out for I have seen these snails on the Barrier reef and left them well alone not really willing to take the risk of what end it fires from. It’s a wonder there have not been more reported deaths ...

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by vk4vfx
Wed Jun 28, 2006 2:56 am
 
Forum: Zoology Discussion
Topic: What is the most poisonous snake in da world?
Replies: 168
Views: 180637
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