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Dictionary » P » Pyramid

Pyramid

pyramid

1. A solid body standing on a triangular, square, or polygonal base, and terminating in a point at the top; especially, a structure or edifice of this shape.

2. (Science: geometry) A solid figure contained by a plane rectilineal figure as base and several triangles which have a common vertex and whose bases are sides of the base.

3. The game of pool in which the balls are placed in the form of a triangle at spot.

(Science: geometry) altitude of a pyramid a pyramid whose axis is perpendicular to the base.

Origin: L. Pyramis, -idis, fr. Gr, of Egyptian origin: cf. F. Pyramide.


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Conditions for a stable ecosystem? (for a simulation)

... simulate? Is the reproduction rate of the top layers somewhat fine-tuned so that no matter the amount of food they have, they won't overflow the pyramid (since this would ensure their own survival)? Or maybe this destructive cycles I'm experiencing are much more common than I think? This also ...

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by Smig
Wed Dec 10, 2008 1:04 pm
 
Forum: Ecology
Topic: Conditions for a stable ecosystem? (for a simulation)
Replies: 11
Views: 3217

Re: Surviving cannibals

... never become one kilogram of cow, which itself will not allow to produce one kilogram of John Smith. This is why food chains have the shape of a pyramid when you consider biomass (or energy): it requires a lot of rabbits to sustain a single fox. This rule is also valid for detritivores/scavengers. ...

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by DrD
Sat Jun 28, 2008 8:08 pm
 
Forum: Ecology
Topic: Surviving cannibals
Replies: 3
Views: 1660

Re:

... than Homo sapiens. Without humans the ecosystem is still full of vigor, but without microbe or green plants the ecosystem is the same as Mars. As pyramid the most important stone is in its base but not on its top. Well that was really... not straight forward but okay, one person says no, the other ...

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by nibs02
Thu Feb 07, 2008 8:54 am
 
Forum: Ecology
Topic: Humans, a keystone species?
Replies: 10
Views: 3374

Humans, a keystone species?

... than Homo sapiens. Without humans the ecosystem is still full of vigor, but without microbe or green plants the ecosystem is the same as Mars. As pyramid the most important stone is in its base but not on its top.

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by tianlai
Wed Feb 06, 2008 4:47 am
 
Forum: Ecology
Topic: Humans, a keystone species?
Replies: 10
Views: 3374

Best diet???

DISCIPLINE...in relation to discipline i am perfectly with you, i can not say the same about the pyramid because in my opinion milk, meat, or eggs are not the important thing for a best diet. I think the quality and porportion of certain biochemical elements (Ca, Fe, proteins, ...

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by GegnianMD
Tue Jan 22, 2008 11:38 pm
 
Forum: Human Biology
Topic: Best diet???
Replies: 9
Views: 1896
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