Question

What’s the difference between food chains, food webs and pyramids of numbers?

Answer 1

Respuesta:

All food chains form this shape. It is called a pyramid of numbers. It has a broad base of plants (producers), supporting a smaller number of plant-eaters (primary consumers), and so on up the pyramid, with the numbers getting smaller as you get higher. The smallest number is always the one that shows the predators at the top.  

Enough to go round

The reason for the pyramid shape is simple. There must always be enough plants producing food at the bottom, or else the whole food chain would collapse. Higher up, no predator (consumer) can be as common as its prey, otherwise both animals would soon die out. This is why sparrowhawks can never be more common than blue tits in an ecosystem that they share.

Explicación:

Answer 2

Respuesta:

All food chains form this shape. It is called a pyramid of numbers. It has a broad base of plants (producers), supporting a smaller number of plant-eaters (primary consumers), and so on up the pyramid, with the numbers getting smaller as you get higher. The smallest number is always the one that shows the predators at the top.  

Enough to go round

The reason for the pyramid shape is simple. There must always be enough plants producing food at the bottom, or else the whole food chain would collapse. Higher up, no predator (consumer) can be as common as its prey, otherwise both animals would soon die out. This is why sparrowhawks can never be more common than blue tits in an ecosystem that they share.

Explicación: